S19500

Seiko Instruments Inc

FOR AUTOMOTIVE 125C OPERATION HIGH-WITHSTAND VOLTAGE

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www.sii-ic.com FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION © Seiko Instruments Inc., 2014-2015 Rev.1.2_00 Seiko Instruments Inc. 1 The S-19500/19501 Series, developed by using high-withstand voltage CMOS technology, is a low dropout positive voltage regulator with the watchdog timer and the reset function, which has high-withstand voltage. The monitoring time of watchdog timer can be adjusted by an external capacitor. Moreover, a voltage detection circuit which monitors the output voltage is also prepared. Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to SII is indispensable.  Features Regulator block

Output voltage: 3.0 V to 5.3 V, selectable in 0.1 V step
Input voltage: 4.0 V to 36.0 V
Output voltage accuracy: ±2.0% (Tj = −40°C to +150°C)
Dropout voltage: 120 mV typ. (5.0 V output product, I OUT = 100 mA)
Output current: Possible to output 200 mA (V IN = VOUT(S) + 1.0 V)*1
Input and output capacitors: A ceramic capacitor of 2.2 μF or more can be used.
Ripple rejection: 70 dB typ. (f = 100 Hz)
Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
Built-in thermal shutdown circuit: Detection temperature 170°C typ. Detector block
Detection voltage: 2.6 V to 5.0 V, selectable in 0.1 V step
Detection voltage accuracy: ±100 mV (Tj = −40°C to +150°C)
Hysteresis width: 0.12 V min.
Release delay time: 18 ms typ. (C DLY = 47 nF)
Output form: Nch open-drain output (Built-in pull-up resistor) Watchdog timer block
Autonomous watchdog operation function: The watchdog timer operates due to detection of load current.
Watchdog activation current is adjustable: 1.5 mA typ. (WADJ pin is open)
Product type is selectable: S-19500 Series (Product with watchdog enable function (Output: WO / RO pin)) S-19501 Series (Product without watchdog enable function (Output: WO pin and RO pin))
Watchdog trigger time is adjustable: 43 ms typ. (C DLY = 47 nF)
Output form: Nch open-drain output (Built-in pull-up resistor) Overall
Current consumption: 60 μA typ. (IOUT = 0 mA, When the watchdog timer is deactivated.) 75 μA typ. (IOUT ≤ 5 mA, When the watchdog timer is activated.)
Operation temperature range: Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
Withstand 45 V load dump
AEC-Q100 qualified*2 *1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large. *2. Contact our sales office for details.  Applications
Constant-voltage power supply for automotive el ectric component, monitoring of microcotroller  Package
HSOP-8A

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 3  AEC-Q100 Qualified This IC supports AEC-Q100 for the operation temperature grade 1. Contact our sales office for details of AEC-Q100 reliability specification.  Product Name Structure Users can select the product type, output voltage and detection voltage for the S-19500/19501 Series. Refer to "1. Product name " regarding the contents of product name, " 3. Package " regarding the package drawings and "4. Product name list " for details of product names. 1. Product name S-1950 x A x x A - E8T1 U 4 Package abbreviation and IC packing specifications*1 E8T1: HSOP-8A, Tape Environmental code U: Lead-free (Sn 100%), halogen-free Operation temperature A: Ta = −40°C to +125°C Product type 2 0: S-19500 Series (Product with watchdog enable function) 1: S-19501 Series (Product wi thout watchdog enable function) Product type 1 A: WEN pin positive logic type Detection voltage*2 F to Z, 0 to 5 Output voltage*2 C to Z, 0, 1 *1. Refer to the tape drawing. *2. Refer to " 2. Product option list ". 2. Product option list 2. 1 Output voltage 2. 2 Detection voltage Set Output Voltage Symbol Set Output Voltage Symbol Set Detection Voltage Symbol Set Detection Voltage Symbol 5.3 V C 4.1 V Q 5.0 V F 3.7 V U 5.2 V D 4.0 V R 4.9 V G 3.6 V V 5.1 V E 3.9 V S 4.8 V H 3.5 V W 5.0 V F 3.8 V T 4.7 V J 3.4 V X 4.9 V G 3.7 V U 4.6 V K 3.3 V Y 4.8 V H 3.6 V V 4.5 V L 3.2 V Z 4.7 V J 3.5 V W 4.4 V M 3.1 V 0 4.6 V K 3.4 V X 4.3 V N 3.0 V 1 4.5 V L 3.3 V Y 4.2 V P 2.9 V 2 4.4 V M 3.2 V Z 4.1 V Q 2.8 V 3 4.3 V N 3.1 V 0 4.0 V R 2.7 V 4 4.2 V P 3.0 V 1 3.9 V S 2.6 V 5

3.8 V T

Remark Set output voltage ≥ Set detection voltage + 0.3 V

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 4 3. Package Table 1 Package Drawing Codes Package Name Dimension Tape Reel Land HSOP-8A FH008-A-P-SD FH008-A-C-SD FH008-A-R-SD FH008-A-L-SD 4. Product name list 4. 1 S-19500 Series (Product with watchdog enable function) Table 2 Output Voltage Detection Voltage HSOP-8A 3.1 V ± 2.0% 2.8 V ± 0.1 V S-19500A03A-E8T1U4 3.3 V ± 2.0% 2.8 V ± 0.1 V S-19500AY3A-E8T1U4 3.3 V ± 2.0% 3.0 V ± 0.1 V S-19500AY1A-E8T1U4 5.0 V ± 2.0% 2.8 V ± 0.1 V S-19500AF3A-E8T1U4 5.0 V ± 2.0% 4.2 V ± 0.1 V S-19500AFPA-E8T1U4 5.0 V ± 2.0% 4.5 V ± 0.1 V S-19500AFLA-E8T1U4 5.0 V ± 2.0% 4.6 V ± 0.1 V S-19500AFKA-E8T1U4 5.0 V ± 2.0% 4.7 V ± 0.1 V S-19500AFJA-E8T1U4 5.3 V ± 2.0% 5.0 V ± 0.1 V S-19500ACFA-E8T1U4 Remark Please contact our sales office for products with specifications other than the above. 4. 2 S-19501 Series (Product without watchdog enable function) Table 3 Output Voltage Detection Voltage HSOP-8A 3.3 V ± 2.0% 2.8 V ± 0.1 V S-19501AY3A-E8T1U4 5.0 V ± 2.0% 2.9 V ± 0.1 V S-19501AF2A-E8T1U4 5.0 V ± 2.0% 3.5 V ± 0.1 V S-19501AFWA-E8T1U4 5.0 V ± 2.0% 4.2 V ± 0.1 V S-19501AFPA-E8T1U4 5.0 V ± 2.0% 4.5 V ± 0.1 V S-19501AFLA-E8T1U4 5.0 V ± 2.0% 4.6 V ± 0.1 V S-19501AFKA-E8T1U4 5.0 V ± 2.0% 4.7 V ± 0.1 V S-19501AFJA-E8T1U4 Remark Please contact our sales office for products with specifications other than the above.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 5  Pin Configuration 1. HSOP-8A Bottom view Top view *1. Connect the heat sink of backside at shadowed area to the board, and set electric potential open or GND. However, do not use it as the function of electrode. Figure 3 Table 4 S-19500 Series (Produc t with Watchdog Enable Function) Pin No. Symbol Description

1 VOUT Voltage output pin (Regulator block)

2 WADJ

Connection pin for watchdog activation threshold current adjustment resistor

3 VSS GND pin

4 DLY Connection pin for delay time

5 WO / RO*1 WO Watchdog output pin

6 WEN Watchdog enable pin

7 WI Watchdog input pin

8 VIN Voltage input pin (Regulator block)

*1. The WO / RO pin combines the watchdog output pin and the reset output pin. Table 5 S-19501 Series (Product without Watchdog Enable Function) Pin No. Symbol Description Connection pin for watchdog activation threshold current adjustment resistor

5 RO Reset output pin

6 WO Watchdog output pin

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 6  Pin Functions 1. WADJ pin This is a pin to connect an external resistor in order to adjust watchdog activation threshold current (I O,WDact). Table 6 shows the connection of the WADJ pin depending on the usage of the watchdog timer. In the S-19500 Series, the watchdog timer is deactivated regardless of the connection of the WADJ pin if the watchdog timer is set to Disable by the WEN pin. Table 6 Usage of Watchdog Timer Connection of WADJ Pin Watchdog timer is not in use Connect to the VSS pin Watchdog timer is always activated Connect to the VOUT pin via a resistor of 270 k Ω Watchdog timer turns on and off autonomously depending on the load current (Autonomous watchdog operation function *1) Open, or connect to the VSS pin via an external resistor *2 *1. Refer to "3. Watchdog timer block " in " Operation" for details. *2. Refer to " Selection of Watchdog Activation Threshold Current Adjustment Resistor (R WADJ,ext)" for details. 2. DLY pin This is a pin to connect an external capacitor in order to adjust the release delay time (t rd) of the detector and monitoring time of the watchdog timer. Refer to "  Selection of Delay Time Adjustment Capacitor (C DLY)" for the selection of an external capacitor. 3. WO / RO pin (S-19500 Series only) This is an output pin for the detector and the watchdog time r. The output level is AND l ogic of the detector and the watchdog timer. (For example, the WO / RO pin is "L" when the WO pin is "L" and the RO pin is "H".) 4. WO pin (S-19501 Series only) This is an output pin for the watchdog timer. It outputs "H " when the watchdog timer stops or if the DLY pin voltage (VDLY) exceeds the upper timing threshold voltage (V DU) when the watchdog timer ope rates. It outputs "L" if V DLY falls below the lower watchdog timing threshold voltage (V DWL) when the watchdog timer operates. 5. RO pin (S-19501 Series only) This is an output pin for the detector. It outputs "H" when V DLY exceeds V DU, and outputs "L" when V DLY falls below the lower reset timing threshold voltage (V DRL). 6. WEN pin (S-19500 Series only) This is a pin to switch Enable / Disable of the watchdog timer. The watchdog timer becomes Enable if the input is "H", and becomes Disable when the input is "L". Since the WEN pin has a built-in pull-down current source, the input becomes "L" when using it in open. 7. WI pin This is an input pin to recieve a trigger signal from the monitored object by the watchdog timer. By being input a rising edge at an appropriate timing, the WI pin confirms the normal operation of the monitored object. Refer to "3. Watchdog timer block " in " Operation".

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 7  Absolute Maximum Ratings Table 7 (Tj = −40°C to +150°C unless otherwise specified) Item Symbol Abso lute Maximum Rating Unit VIN pin voltage V IN V SS − 0.3 to VSS + 45.0 V VOUT pin voltage V OUT V SS − 0.3 to VIN + 0.3 ≤ VSS + 7.0 V DLY pin voltage V DLY V SS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V RO pin voltage V RO V SS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V WADJ pin voltage V WADJ V SS − 0.3 to VIN + 0.3 ≤ VSS + 7.0 V WEN pin voltage V WEN V SS − 0.3 to VSS + 7.0 V WI pin voltage V WI V SS − 0.3 to VSS + 7.0 V WO pin voltage V WO V SS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V WO / RO pin voltage V WO / RO V SS − 0.3 to VOUT + 0.3 ≤ VSS + 7.0 V Output current I OUT 260 mA Junction temperature T j −40 to +150 °C Operation ambient temperature T opr −40 to +125 °C Storage temperature T stg −40 to +150 °C Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefor e not be exceeded under any conditions.  Thermal Resistance Value Table 8 Item Symbol Condition Min. Typ. Max. Unit Junction-to-ambient thermal resistance *1 θja HSOP-8A Board 1 − 104 − °C/W Board 2 − 74 − °C/W Board 3 − 39 − °C/W Board 4 − 37 − °C/W Board 5 − 31 − °C/W *1. Test environment: compliance with JEDEC STANDARD JESD51-2A Remark Refer to " Thermal Characteristics " for details of power dissipation and test board.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 8  Recommended Operation Conditions Table 9 Item Symbol Condition Min. Typ. Max. Unit VIN pin voltage V IN − 4.0 − 36.0 V When using autonomous watchdog operation function *1 VOUT(S) + 1.0 − 36.0 V VOUT pin voltage V OUT Detector block 1.0 − − V Watchdog timer block +VDET − − V Watchdog input voltage "H" *2 VWIH − 2 − − V Watchdog input voltage "L" *2 VWIL − − − 0.8 V Watchdog input "H" time *2 thigh V WI ≥ VWIH 5.0 − − μ s Watchdog input "L" time *2 tIow V WI ≤ VWIL 5.0 − − μ s Slew rate*2 dVWI dt VWI = VWIL + (VWIH − VWIL) × 0.1 to VWIL + (VWIH − VWIL) × 0.9 1 − − V/μs Watchdog input frequency f WI Duty ratio 50% − − 0.2 MHz WEN pin input voltage "H" V WENH − 2.0 − VOUT(S) V WEN pin input voltage "L" V WENL − 0 − 0.8 V *1. Refer to "3. Watchdog timer block " in " Operation" for the autonomous watchdog operation function. *2. When inputting a rising edge that satisfies the condition of Figure 4 to the WI pin, the watchdog timer detects a trigger. The signal input from the monitored object by the watchdog timer should satisfy the condition of Figure 4. VWIH VWIL VWI tlow thigh dVWI dt t Figure 4

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 9  Electrical Characteristics 1. Regulator block Table 10 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Output voltage*1 VOUT(E) VIN = 13.5 V, IOUT = 30 mA VOUT(S) − 2.0% VOUT(S) VOUT(S) + 2.0% V 1 Output current*2 IOUT VIN ≥ VOUT(S) + 1.0 V 200*4 − − mA 2 Dropout voltage*3 Vdrop IOUT = 30 mA, Ta = +25°C, VOUT(S) = 3.0 V to 5.3 V − 40 50 mV 1 IOUT = 100 mA, Ta = +25°C, VOUT(S) = 3.0 V to 5.3 V − 120 200 mV 1 Line regulation ΔVOUT1 ΔVIN • VOUT VOUT(S) + 1.0 V ≤ VIN ≤ 36.0 V, IOUT = 30 mA, Ta = +25°C − 0.02 0.10 %/V 1 Load regulation ΔVOUT2 VIN = 13.5 V, 100 μA ≤ IOUT ≤ 100 mA, Ta = +25°C − 20 40 mV 1 Input voltage V IN − 4.0 − 36.0 V − Ripple rejection |RR| VIN = 13.5 V, IOUT = 30 mA, f = 100 Hz, ΔVrip = 1.0 Vp-p − 70 − dB 3 Short-circuit current I short VIN = 13.5 V, VOUT = 0 V, Ta = +25°C − 60 − mA 2 Thermal shutdown detection temperature TSD Junction temperature − 170 − °C − Thermal shutdown release temperature TSR Junction temperature − 135 − °C − *1. V OUT(S): Set output voltage V OUT(E): Actual output voltage Output voltage when fixing I OUT (= 30 mA) and inputting 13.5 V *2. The output current at which the output voltage becomes 95% of V OUT(E) after gradually increasing the output current. *3. V drop = VIN1 − (VOUT3 × 0.98) V OUT3 is the output voltage when V IN = VOUT(S) + 1.0 V. VIN1 is the input voltage at which t he output voltage becomes 98% of V OUT3 after gradually decreasing the input voltage. *4. The output current can be at least this value. Due to limitation of the power dissipation, this value may not be satisfied. Attention should be paid to the power dissipation when the output current is large. This specification is guaranteed by design.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 10 2. Detector block Table 11 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Detection voltage*1 −VDET − −VDET(S) − 0.1 −VDET(S) −VDET(S) + 0.1 V 4 Hysteresis width V HYS − 120 150 − mV 4 Reset output voltage "H" V ROH − VOUT(S) × 0.9 − − V 4 Reset output voltage "L" V ROL VOUT ≥ 1.0 V, RextR ≥ 3 kΩ, Connect to VOUT pin − 0.2 0.4 V 4 Reset pull-up resistance RRO VOUT pin internal resistance 20 30 45 k Ω − Reset output current I RO V RO = 0.4 V, VOUT = −VDET(S) − 0.1 V 3.0 − − mA 5 Lower reset timing threshold voltage VDRL − 0.2 0.3 0.4 V 6 Upper timing threshold voltage VDU − 1.5 1.9 2.3 V 6 Charge current I D,cha V DLY = 1.0 V 2.0 5.0 8.0 μA 6 Release delay time*2 trd C DLY = 47 nF 11 18 25 ms 4 Reset reaction time*3 trr C DLY = 47 nF − − 50 μs 4 *1. −VDET: Actual detection voltage, −VDET(S): Set detection voltage *2. The time period from when V OUT changes to −VDET(S) − 0.15 V → VOUT(S) to when VRO reaches VOUT / 2. *3. The time period from when V OUT changes to VOUT(S) → −VDET(S) − 0.15 V to when VRO reaches VOUT / 2.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 11 3. Watchdog timer block 3. 1 S-19500 Series (Product with watchdog enable function) Table 12 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Watchdog activation threshold current IO,WDact WADJ pin is open 1.1 1.5 1.9 mA 7 Watchdog deactivation threshold current IO,WDdeact WADJ pin is open − 1.3 − mA 7 Watchdog activation hysteresis current IO,WDhys WADJ pin is open 0.1 0.2 − mA 7 Watchdog activation threshold voltage VWADJ,th − 1.28 1.35 1.45 V 8 WADJ pin current ratio IOUT IWADJ VWADJ = 0 V, IOUT = 10 mA − 750 − − 8 WADJ pin internal resistance R WADJ,int − 490 650 845 k Ω − Charge curernt I D,cha V DLY = 1.0 V 2 5 8 μA 9 Discharge current I D,dcha V DLY = 1.0 V 0.6 1.3 2.0 μA 9 Upper timing threshold voltage VDU − 1.5 1.9 2.3 V 9 Lower watchdog timing threshold voltage VDWL − 0.5 0.7 0.9 V 9 Watchdog output pulse period tWD,p CDLY = 47 nF 38 54 72 ms 7 Watchdog output "L" time t WD,l VOUT > −VDET, CDLY = 47 nF Watchdog timer is activated 6 11 16 ms 7 Watchdog trigger time t WI,tr C DLY = 47 nF 32 43 56 ms 7 WEN pin input voltage "H" V SH − 2 − − V 10 WEN pin input voltage "L" V SL − −− 0.8 V 10 WEN pin input current "H" I SH V WEN = VOUT(S) −− 1 μA 10 WEN pin input current "L" I SL V WEN = 0 V −− 0.1 μA 10 tWI,tr t VDLY VDU VDWL tWD,l t VWO / RO tWD,p Figure 5

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 12 3. 2 S-19501 Series (Product without watchdog enable function) Table 13 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Watchdog activation threshold current I O,WDact WADJ pin is open 1.1 1.5 1.9 mA 7 Watchdog deactivation threshold current IO,WDdeact WADJ pin is open − 1.3 − mA 7 Watchdog activation hysteresis current IO,WDhys WADJ pin is open 0.1 0.2 − mA 7 Watchdog activation threshold voltage VWADJ,th − 1.28 1.35 1.45 V 8 WADJ pin current ratio IOUT IWADJ VWADJ = 0 V, IOUT = 10 mA − 750 − − 8 WADJ pin internal resistance R WADJ,int − 490 650 845 k Ω − Watchdog output voltage "H" V WOH − VOUT(S) × 0.9 − − V 13 Watchdog output voltage "L" V WOL RextW ≥ 3 kΩ, Connect to VOUT pin − 0.2 0.4 V 13 Watchdog pull-up resistance R WO VOUT pin internal resistance 20 30 45 k Ω − Watchdog output current I WO VWO = 0.4 V, VOUT = −VDET(S) − 0.1 V 3.0 − − mA 14 Charge current I D,cha V DLY = 1.0 V 2 5 8 μA 9 Discharge current I D,dcha V DLY = 1.0 V 0.6 1.3 2.0 μA 9 Upper timing threshold voltage VDU − 1.5 1.9 2.3 V 9 Lower watchdog timing threshold voltage VDWL − 0.5 0.7 0.9 V 9 Watchdog output pulse period tWD,p C DLY = 47 nF 38 54 72 ms 7 Watchdog output "L" time t WD,l VOUT > −VDET, CDLY = 47 nF Watchdog timer is activated 6 11 16 ms 7 Watchdog trigger time t WI,tr C DLY = 47 nF 32 43 56 ms 7 tWI,tr t VDLY VDU VDWL tWD,l t VWO tWD,p Figure 6

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 13 4. Overall Table 14 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Current consumption during operation I SS1 IOUT ≤ 5 mA, WADJ pin is open, Watchdog timer is activated, WO pin = "H" − 75 115 μA 11 IOUT = 50 mA, WADJ pin is open, Watchdog timer is activated, WO pin = "H" − 80 125 μA 11 IOUT = 200 mA, WADJ pin is open, Watchdog timer is activated, WO pin = "H" − 100 150 μA 11 Current consumption when watchdog timer is deactivated I SS2 IOUT = 0 mA, Watchdog timer is deactivated − 60 95 μA 12

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 19  Condition of Application Input capacitor (CIN) : 2 . 2 μF or more Output capacitor (CL) : 2 . 2 μF or more ESR of output capacitor : 10 Ω or less Delay time adjustment capacitor (C DLY) : 1.0 nF or more Watchdog activation threshold current adjustment resistor (R WADJ,ext) : 10 k Ω or more External pull-up resistors (R extR, RextW) : 3 k Ω or more Caution Generally a series regulator may cause oscilla tion, depending on the selection of external parts. Confirm that no oscillation occurs in the appli cation for which the abov e capacitors are used.  Selection of Input and Output Capacitors (CIN, CL) The S-19500/19501 Series requires C L between the VOUT pin and the VSS pin fo r phase compensation. Operation is stabilized by a ceramic capacitor wi th an output capacitance of 2.2 μF or more over the entire temperature range. When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capaci tor, the capacitance must be 2.2 μF or more, and the ESR must be 10 Ω or less. The values of output overshoot and undershoot, which are tr ansient response characteristics, vary depending on the value of the output capacitor. The required value of capacitance for the input ca pacitor differs depending on the application. Caution Define the capacitance of C IN and C L by sufficient evaluation including the temperature characteristics under the actual usage conditions.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 20  Selection of Delay Time Adjustment Capacitor (CDLY) In the S-19500/19501 Series, the delay time adjustment capacitor (C DLY) is necessary between the DLY pin and the VSS pin to adjust the release delay time (t rd) of the detector and the monitoring time of the watchdog timer. The set release delay time (t rd(S)), the set watchdog trigger time (t WI,tr(S)), the set watchdog output "L" time (t WD,l(S)) and the set watchdog output pulse period (t WD,p(S)) are calculated by using following equations, respectively. The release delay time (t rd), the watchdog trigger time (t WI,tr), the watchdog output "L" time (t WD,l) and the watchdog output pulse period (t WD,p) at the time of the condition of C DLY = 47 nF are shown in "  Electrical Characteristics ". trd(S) [ms] = trd [ms] × CDLY [nF] 47 [nF] tWI,tr(S) [ms] = tWI,tr [ms] × CDLY [nF] 47 [nF] tWD,l(S) [ms] = tWD,l [ms] × CDLY [nF] 47 [nF] tWD,p(S) [ms] = tWI,tr(S) [ms] + tWD,l(S) [ms] Caution 1. The above equations will not guarantee successful operation. Perform thorough evaluation including the temperature characteristics using an actual application to set the constants. 2. Mounted board layout should be made in such a way that no current flows into or flows from the DLY pin since the impedance of the DLY pin is high, otherwise correct delay time and monitoring time may not be provided. 3. Select C DLY whose leakage current can be ignored against the built-in constant current. The leakage current may cause deviation in delay time and monitoring time. When the leakage current is larger than the built-in constant current, no release takes place.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 21  Selection of Watchdog Activation Thres hold Current Adjustment Resistor (R WADJ,ext) In the S-19500/19501 Series, the watchdog activa tion threshold current adjustment resistor (R WADJ,ext) can be connected between the WADJ pin and the VSS pin to adjust the watchdog timer activation threshold current. The set watchdog activation threshold current (I O,WDact(S)), the set watchdog deactivation threshold current (I O,WDdeact(S)) and the set watchdog activation hysteresis current (I O,WDhys(s)) are calculated by using following equations, respectively. The watchdog activation threshold current (I O,WDact), the watchdog deactivation threshold current (I O,WDdeact) and the watchdog activation hysteresis current (I O,WDhys) when the WADJ pin is open are shown in "  Electrical Characteristics". IO,WDact(S) [mA] = IO,WDact [mA] ×  1 + RWADJ,int [kΩ] RWADJ,ext [kΩ] IO,WDdeact(S) [mA] = IO,WDdeact [mA] ×  1 + RWADJ,int [kΩ] RWADJ,ext [kΩ] IO,WDhys(S) [mA] = IO,WDact(S) [mA] − IO,WDdeact(S) [mA] Caution 1. The above equations will not guarantee successful operation. Perform thorough evaluation including the temperature characteristics using an actual application to set the constants. 2. Mounted board layout should be made in such a way that no current flows into or flows from the WADJ pin since the impedance of the WADJ pin is high, otherwise correct I O,WDact and I O,WDdeact may not be provided.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 22  Explanation of Terms 1. Regulator block 1. 1 Low dropout voltage regulator This voltage regulator has the low dropout volta ge due to its built-in low on-resistance transistor. 1. 2 Output voltage (V OUT) The accuracy of the outp ut voltage is ensured at ±2.0% under specified conditions of fixed input voltage *1, fixed output current, and fixed temperature. *1. Differs depending on the product. Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range of the output voltage. Refer to "1. Regulator block" in "  Electrical Characteristics" and "1. Regulator block" in "  Characteristics (Typical Data)" for details. 1. 3 Line regulation  ΔVOUT1 ΔVIN • VOUT Indicates the dependency of the output voltage against the input voltage. T hat is, the value shows how much the output voltage changes due to a change in the inpu t voltage after fixing ou tput current constant. 1. 4 Load regulation ( ΔVOUT2) Indicates the dependency of the output voltage against t he output current. That is, the value shows how much the output voltage changes due to a change in the ou tput current after fixing input voltage constant. 1. 5 Dropout voltage (V drop) Indicates the difference between input voltage (V IN1) and the output voltage when; decreasing input voltage (V IN) gradually until the output vo ltage has dropped out to the value of 98% of output voltage (V OUT3), which is at V IN = VOUT(S) + 1.0 V. Vdrop = VIN1 − (VOUT3 × 0.98)

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 24 2. 5 Reset reaction time (t rr) The reset reaction time is the time period from when V OUT falls below the detection voltage ( −VDET) to when the RO pin output inverts (Refer to Figure 37). Since t rr depends on the reaction time of internal circuit and the discharge time of CDLY, it becomes longer if the capacitance of C DLY becomes larger. Refer to " 2. 9 Reset reaction time vs. Capacitance for delay time adjustment capacitor " in " Characteristics (Typical Data) ". trr VOUT VRO V −VDET VDRL VDLY Figure 37 Reset Reaction Time Caution Values shown in "2. Detector block" in "  Electrical Characteristics" are values when watchdog timer stops. trr may shorten since the discharge operation of C DLY may be performed while the watchdog timer operates.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 25 3. Watchdog timer block 3. 1 Watchdog trigger time (t WI,tr) The watchdog trigger time is the time period from when the watchdog timer initiates the detection of a trigger signal to when a time-out is detected and t he WO pin output changes to "L" (Refer to Figure 38 ). This value changes according to C DLY. t WI,tr is determined by a built-in cons tant current which charges C DLY, the charge detection threshold of the DLY pin, and the capacitance of C DLY. It is calculated by using the following equation. tWI,tr = CDLY × (VDU − VDWL) ID,dcha tWI,tr t VDLY VDU VDWL tWD,l t VWO tWD,p Figure 38 Watchdog Trigger Time 3. 2 Watchdog output "L" time (tWD,I) The watchdog output "L" time is the time period when the WO pin continues "L" after the watchdog timer detects a time-out. This value changes according to C DLY, and is calculated by using the following equation. tWD,I = CDLY × (VDU − VDWL) ID,dcha 3. 3 Watchdog output pulse period (t WD,p) The watchdog output pulse period is the period of the co ntinuous rectangular wave that appears in the WO pin when the watchdog timer repeats the detection of a time-o ut. It is calculated by using the following equation. t WD,p = tWI,tr + tWD,I Caution Values shown in "3. Watchdog timer block" in "  Electrical Characteristics" and "  Characteristics (Typical Data)" are values when V OUT decreases to −VDET or lower and the discharge operation of C DLY due to the detector operation is not performed. The discharge operation of C DLY could be performed when V OUT decreases to −VDET o r l o we r , a t t h a t time, tWI,tr, tWD,I and tWD,p may be changed.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 27 1. 3 Overcurrent protection circuit The S-19500/19501 Series includes an overcurrent protection circuit which having the characteristics shown in "1. 1 Output voltage vs. Output current (When load current increases) (Ta = +25°C)" of " 1. Regulator block" in " Characteristics (Typical Data) ", in order to limit an excessive out put current and overcurrent of the output transistor due to short-circuiting between the VO UT pin and the VSS pin. The current when the output pin is short-circuited (I short) is internally set at approx. 60 mA typ., and the load current when short-circuiting is limited based on this value. The output voltage restarts regulating if the output transistor is released from overcurrent status. Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps short circuiting, pay attention to the conditions of input voltage and load current so that, under the usage conditions including short circuit, th e loss of the IC will not exceed power dissipation. 1. 4 Thermal shutdown circuit The S-19500/19501 Series has a thermal shutdown circuit to limit self-heating. When the junction temperature rises to 170 °C typ., the thermal shutdown circuit operates to stop regulating. After that, when the junction temperature drops to 135 °C typ., the thermal shutdown circuit is released to restart regulating. Due to self-heating of the S-19500/19 501 Series, if the thermal shutdown circuit starts operating, it stops regulating so that the output voltage drops. For this reason , self-heating is limited and the IC's temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus self-heating is generated again due to rising of the output voltage. Repeating this procedure makes the waveform of the VOUT pin output into a pulse-like form. This phenomenon continue s unless decreasing either or both of the input voltage and the output current in order to reduce the internal po wer consumption, or decreasin g the ambient temperature. Note that the product may suffer physical damage such as deterioration if the above phenomenon occurs continuously. Table 15 Thermal Shutdown Circuit VOUT Pin Voltage Detect: 170°C typ.*1 VSS level Release: 135°C typ.*1 Set value *1. Junction temperature

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 29 2. 2 Delay circuit When the output voltage (V OUT) of the regulator rises under the status t hat "L" is output to the RO pin, the reset release signal is output to the RO pin later than when V OUT becomes +VDET. The release delay time (t rd) changes according to CDLY. Refer to " Selection of Delay Time Adjustment Capacitor (C DLY)" for details. Moreover, when V OUT decreases to −VDET or lower, the delay time of the same time length as the reset reaction time (t rr) occurs in the output to the RO pin. Refer to " 2. Detector block " in "  Explanation of Terms " for details. If the time period from when V OUT decreases to −VDET or lower to when V OUT increases to +VDET or higher is significantly shorter compared to the length of t rr, VDLY may not decrease to V DRL or lower. In that case, "H" output remains in the RO pin. Caution Since t rd depends on the charge time of C DLY, t rd may be shorter than the set value if the charge operation is initiated under the condition that a residual electric charge is left in C DLY. 2. 3 Output circuit The output form of the RO pi n is Nch open-drain. The RO pin can output a signal without an external pull-up resistor since it has a built-in resistor to pull up to the VOUT pin internally. Do not connect to the pin other than VOUT pin when conn ecting an external pull-up resistor to the RO pin. In the S-19500 Series, the reset output pin is prepared as the WO / RO pin. Caution Define the external pull-up resistance by sufficient evaluation including the temperature characteristics under the actual usage conditions.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 30 3. Watchdog timer block 3. 1 Basic operation The watchdog timer operates as follows during monitoring operation. (1) When the WO pin outputs "H", C DLY is discharged by an internal constant current source, and the DLY pin voltage (VDLY) decreases. The watchdog timer detects a trigger and the C DLY is charged by an internal constant current source if a rising edge is input to the WI pin from a monitored object by the watchdog timer, and then VDLY rises. The discharge operation is restarted if V DLY reaches the upper timing threshold voltage (V DU), and VDLY decreases again. By inputting a rising edge to the WI pin again during the discharge operation, the similar operation is repeated. At this time, t he WO pin outputs "H" continuously. (2) The watchdog timer does not detect a trigger if the rising edge is not input to the WI pin from a monitored object by the watchdog timer when the C DLY is discharged and V DLY decreases. The WO pin outputs "L" if the discharge operation continues not detecting a trigger when V DLY reaches the lower watchdog timing threshold voltage (VDWL). This operation is called the time-out detection. (3) After the time-out detection, C DLY is charged while the WO pin outputs "L", and V DLY increases. The WO pin outputs "H" and restarts t he discharge operation if V DLY reaches VDU. (4) By the operation of (3), a monitored object by the watc hdog timer is reset. If a rising edge is input to the WI pin again, the operation similar to (1) is continued since the watchdog timer detects a trigger. (5) After the operation of (3), if the st atus in which a rising edge is not input to the WI pin continues, the watchdog timer repeats the operation of (5) → (3) → (5) →... DLY WO Reference voltage circuit WI WDT input circuit VOUT WEN Charge- discharge control circuit Output current detection circuit WDT enable circuit VSS VIN WADJ CDLY Figure 42

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 31 The time period from when the watchdog timer detects a trigger to when it detects a time-out (t WD,TO) is indicated as the following expression. Figure 43 shows a timing chart of the watchdog timer. tWI,tr ≤ tWD,TO ≤ tWD,p t VDLY VDU VDWL t VWO t VWI tWI,tr tWD,TO Figure 43 Regardless of the status of the watc hdog timer, the capacitance of C DLY could be discharged by the detector operation. Even if watchdog timer detects a trigger of sign al input to the WI pin, the WO pin outputs "L" when V DLY reaches VDWL. After that, the watchdog timer restarts the monitoring operation if the WO pin outputs "H" when V DLY reaches VDU. 3. 2 Output current detection circuit Since the S-19500/19501 Series has a built-in output current detection circuit, the watchdog timer operates autonomously. When using the autonomous watchdog operation function, the current flows in the load is detected by the output current of the regulator, the watchdog time r initiates the activation when the output current is the watchdog activation threshold current (I O,WDact) or more, the watchdog timer is deactivated when the output current is the watchdog deactivation threshold current (I O,WDdeact) or less When not using the autonomous watchdog operation func tion, select a connection of the WADJ pin from Table 6 in " Pin Functions ".

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 33 3. 3 Watchdog enable circuit S-19500 Series has a built-in watchdog Enable circuit that switches Enable or Disable of the watchdog timer due to input to the WEN pin. When inputting "L" to the WE N pin, the watchdog timer becomes Disable and stops the output current detection operation and monitoring activati on. When inputting "H" to the WEN pin, the watchdog timer becomes Enable. The watchdog timer monitoring activa tion is performed depending on the connection of the WADJ pin. The internal equivalent circuit of the WEN pin is configured as shown in Figure 46, and is pulled down internally by the constant current source. For th is reason, the WEN pin is set to "L" when using the WEN pin in the floating status, and the watchdog timer becomes Disable. However, in order that the watchdog timer become Disable certainly, connect the WEN pin to GND so that "L" is input to the WEN pin certainly, since the impedance of the WEN pin is high when using the WEN pin in the floating status. In order to fix the watchdog timer to Enable, connect the WE N pin to the VOUT pin so that "H" is input to the WEN pin. Table 16 shows the relation between status of each pins and the watchdog timer. Table 16 WEN Pin Input Logic WADJ Pin Connection*1 Output Current*2 Output Current Detection Circuit Watchdog Timer Monitoring Activation WO Pin Input Logic "H" Open, or connect to VSS pin via external resistor *3 "H" Operate Activate "H" or "L" "H" Open, or connect to VSS pin via external resistor *3 "L" Operate Deactivate "H" "H" Connect to VOUT pin via resistor of 270 kΩ Don't care Stop Activate "H" or "L" "H" Connect to VSS pin Don't care Stop Deactivate "H" "L" Don't care Don't care Stop Deactivate "H" *1. Refer to " 1. WADJ pin " in " Pin Functions". *2. Output current "H": I OUT > IO,WDact Output current "L": I OUT < IO,WDdeact *3. Refer to "  Selection of Watchdog Activation Threshold Current Adjustment Resistor (R WADJ,ext)". VSS WEN VOUT Figure 46

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 34 3. 4 Watchdog input circuit By inputting a rising edge to the WI pin, the watchdog timer detects a trigger. The S-19500/19501 Series has a built-in watchdog input circuit which contains a band pass f ilter in the WI pin, and detects a rising edge which satisfies an input condition as a trigger signal. Refer to *2 and Figure 4 in "  Recommended Operation Conditions". During the operation of the watchdog timer, a trigger is detected only when the DLY pin voltage is in V DU to VDWL and while the discharge operation of C DLY is being performed. Refer to " 3. Watchdog timer block " in " Operation " for details. The signal input from a monitored object by the watchdog timer to the watchdog timer should be input with a time interval which is sufficiently shorter than the watchdog trigger time (t WI,tr). Caution Under a noisy environment, the watchdog input circuit may detect the noise as a trigger signal. Sufficiently evaluate with the actual application to confirm that a trigger is detected only in the intended signal. 3. 5 Watchdog output circuit The output form of the WO pin is Nch open-drain. The WO pin can output a signal without an external pull-up resistor since it has a built-in resistor to pull up to the VOUT pin internally. Do not connect to the pin other than VOUT pin when connecting an external pull-up resistor to the WO pin. In the S-19500 Series, the watchdog output pin is prepared as the WO / RO pin. Caution Define the external pull-up resistance by sufficient evaluation including the temperature characteristics under the actual usage conditions.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 37  Precautions

Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When mounting an output capacitor between the VOUT pin and the VSS pin (C L) and a capacitor for stabilizing the input between the VIN pin and the VSS pin (C IN), the distance from the capacitors to these pins should be as short as possible.
Note that generally the output voltage may increase when a series regulator is used at low load current (0.1 mA or less).
Note that generally the output voltage may increase due to the leakage current from an output transistor when a series regulator is used at high temperature.
Generally a series regulator may cause oscillation, dep ending on the selection of external parts. The following conditions are recommended for the S-19500/19501 Series. Ho wever, be sure to perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. Refer to " 3. Equivalent series resistance vs. Output current characteristics (Ta = +25°C)" in "  Reference Data " for the equivalent series resistance (RESR) of the output capacitor. Input capacitor (C IN): 2.2 μF or more Output capacitor (C L): 2.2 μF or more
In a series regulator, generally the values of oversh oot and undershoot in the output voltage vary depending on the variation factors of power-on, power supply fluctuat ion and load fluctuation, or output capacitance. Determine the conditions of the output capacitor after sufficiently evaluating the temperature characteristics of overshoot or undershoot in the output voltage with the actual device.
The voltage regulator may oscillate wh en the impedance of the power supply is high and the input capacitance is small or an input capacitor is not connected.
Overshoot may occur in the output voltage momentarily if t he voltage is rapidly raised at power-on or when the power supply fluctuates. Sufficiently evaluate the output voltage at that time with the actual device.
If the VOUT pin is steeply shorted with GND, a negative voltage exceeding the absolute maximum ratings may occur to the VOUT pin due to resonance of the wiring induct ance and the output capacitance in the application. The negative voltage can be limited by inse rting a protection diode between the VO UT pin and the VSS pin or inserting a series resistor to the output capacitor.
The application conditions for the input voltage, the output voltage, and the load current should not exceed the power dissipation.
Do not apply an electrostatic discharge to this IC that ex ceeds the performance ratings of the built-in electrostatic protection circuit.
In determining the output current, attention should be paid to the output current value specified in Table 10 in "  Electrical Characteristics " and footnote *4 of the table.
SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party.

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 38  Characteristics (Typical Data) 1. Regulator block 1. 1 Output voltage vs. Output current (When load current increases) (Ta = +25°C) 4.0 0.0 0 600 IOUT [mA] 3.0 2.0 1.0 VOUT [V] 500400300200100 VIN = 3.8 V VIN = 4.3 V VIN = 13.5 V 6.0 0.0 0 600 IOUT [mA] VOUT [V] 500400300200100 5.0 4.0 3.0 2.0 1.0 VIN = 5.5 V VIN = 6.0 V VIN = 13.5 V 1. 2 Output voltage vs. Input voltage (Ta = +25°C) 4.0 0.0 01 8 VIN [V] 3.0 2.0 1.0 VOUT [V] 1512963 IOUT = 1 mA IOUT = 30 mA IOUT = 10 mA IOUT = 100 mA 6.0 0.0 01 8 VIN [V] VOUT [V] 1512963 5.0 4.0 3.0 2.0 1.0 IOUT = 1 mA IOUT = 30 mA IOUT = 10 mA IOUT = 100 mA 1. 3 Dropout voltage vs. Output current 200 0 200 IOUT [mA] 150 100 Vdrop [mV] 15010050 Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C 200 0 200 IOUT [mA] 150 100 Vdrop [mV] 15010050 Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C 1. 4 Dropout voltage vs. Junction temperature −25 0 150 125100755025−40 Tj [°C] 100 Vdrop [mV] IOUT = 30 mA IOUT = 100 mA −25 0 150 125100755025−40 Tj [°C] 100 Vdrop [mV] IOUT = 30 mA IOUT = 100 mA

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 39 1. 5 Output voltage vs. Junction temperature 1. 5. 1 V OUT = 3.3 V VIN = 13.5 V 1. 5. 2 V OUT = 5.0 V VIN = 13.5 V −25 0 150 125100755025−40 Tj [°C] 3.0 3.6 VOUT [V] 3.5 3.4 3.3 3.2 3.1 −25 0 150 125100755025−40 Tj [°C] 4.7 5.3 VOUT [V] 5.2 5.1 5.0 4.9 4.8 1. 6 Ripple rejection (Ta = +25°C) 1. 6. 1 V OUT = 3.3 V VIN = 13.5 V, CL = 2.2 μF 1. 6. 2 V OUT = 5.0 V VIN = 13.5 V, CL = 2.2 μF 100 1k 10k Ripple Rejection [dB] Frequency [Hz] 10 1M 100 100k IOUT = 1 mA IOUT = 30 mA IOUT = 100 mA 100 1k 10k Ripple Rejection [dB] Frequency [Hz] 10 1M 100 100k IOUT = 1 mA IOUT = 30 mA IOUT = 100 mA 2. Detector block 2. 1 Detection voltage, Release voltage vs. Junction temperature 25 0 150 12510075502540 Tj [°C] 2.2 3.2 3.0 2.8 2.6 2.4 VDET, VDET [V] VDET VDET 25 0 150 12510075502540 Tj [°C] 4.3 5.3 5.1 4.9 4.7 4.5 VDET, VDET [V] VDET VDET 2. 2 Hysteresis width vs. Junction temperature −25 0 150 125100755025−40 Tj [°C] 300 VHYS [mV] 250 200 150 100 −25 0 150 125100755025−40 Tj [°C] 300 VHYS [mV] 250 200 150 100

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 40 2. 3 Nch transistor output current vs. VDS 100 0.0 3.0 IRO [mA] VDS [V] Ta = +125°C Ta = +25°C Ta = −40°C 200 IRO [mA] VDS [V] 160 120 4321 Ta = +125°C Ta = +25°C Ta = −40°C 2. 4 Nch transistor output current vs. Output voltage 2. 4. 1 −VDET = 2.6 V VDS = 0.4 V 2. 4. 2 −VDET = 4.7 V VDS = 0.4 V 0.0 3.0 IRO [mA] VOUT [V] Ta = +125°C Ta = +25°C Ta = −40°C IRO [mA] VOUT [V] 4321 Ta = +125°C Ta = +25°C Ta = −40°C 2. 5 Nch transistor output voltage vs. Output voltage 2. 5. 1 −VDET = 2.6 V VDS = 0.4 V 2. 5. 2 −VDET = 4.7 V VDS = 0.4 V 0.0 3.0 VRO [V] VOUT [V] Tj = +125°CTj = +150°C Tj = +25°C Tj = −40°C VRO [V] VOUT [V] 4321 Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C Remark VDS: Drain-to-source voltage of the output transistor

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 41 2. 6 Release delay time vs. Junction temperature −25 0 150 125100755025−40 Tj [°C] trd [ms] −25 0 150 125100755025−40 Tj [°C] trd [ms] 2. 7 Release delay time vs. Capacitance for delay time adjustment capacitor 1000 1000 100 0.1 100101 trd [ms] CDLY [nF] Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C 1000 1000 100 0.1 100101 trd [ms] CDLY [nF] Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C 2. 8 Reset reaction time vs. Junction temperature 25 0 150 12510075502540 Tj [C] trr [s] 25 0 150 12510075502540 Tj [C] trr [s] 2. 9 Reset reaction time vs. Capacitance for delay time adjustment capacitor 100 1000 100101 trr [μs] CDLY [nF] Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C 100 1000 100101 trr [μs] CDLY [nF] Tj = +125°C Tj = +150°C Tj = +25°C Tj = −40°C

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 42 3. Watchdog timer block 3. 1 Watchdog trigger time vs. Junction temperature 3. 1. 1 V OUT = 3.3 V VIN = 13.5 V 3. 1. 2 V OUT = 5.0 V VIN = 13.5 V 25 0 150 12510075502540 Tj [C] tWI,tr [ms] 25 0 150 12510075502540 Tj [C] tWI,tr [ms] 3. 2 Watchdog trigger time vs. Capacitance for delay time adjustment capacitor 3. 2. 1 V OUT = 3.3 V VIN = 13.5 V 3. 2. 2 V OUT = 5.0 V VIN = 13.5 V 1000100101 tWI,tr [ms] CDLY [nF] 10000 1000 100 0.1 Tj = 125C Tj = 150C Tj = 25C Tj = 40C 1000100101 tWI,tr [ms] CDLY [nF] 10000 1000 100 0.1 Tj = 125C Tj = 150C Tj = 25C Tj = 40C 3. 3 Charge current, discharge current vs. Junction temperature 3. 3. 1 V OUT = 3.3 V VIN = 13.5 V 3. 3. 2 V OUT = 5.0 V VIN = 13.5 V 25 0 150 12510075502540 Tj [°C] ID,cha, ID,dcha [A] 6 ID,dcha ID,cha 25 0 150 12510075502540 Tj [°C] ID,cha, ID,dcha [A] 6 ID,dcha ID,cha 3. 4 Upper timing threshold voltage, lower watchdog timing thre shold voltage, lower reset timing threshold voltage vs. Junctio n temperature 3. 4. 1 V OUT = 3.3 V VIN = 13.5 V 3. 4. 2 V OUT = 5.0 V VIN = 13.5 V 25 0 150 12510075502540 Tj [C] 0.0 2.5 VDU, VDWL, VDRL [V]2.0 1.5 1.0 0.5 VDWL VDRL VDU 25 0 150 12510075502540 Tj [C] 0.0 2.5 2.0 1.5 1.0 0.5 VDU, VDWL, VDRL [V] VDWL VDRL VDU

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 43 3. 5 Watchdog activation current, watchdog d eactivation current vs. Junction temperature 3. 5. 1 V OUT = 3.3 V VIN = 13.5 V 3. 5. 2 V OUT = 5.0 V VIN = 13.5 V 25 0 150 12510075502540 Tj [C] 0.0 3.0 IO,WDact, IO,WDdeact [mA]2.5 2.0 1.5 1.0 0.5 IO,WDdeact IO,WDact 25 0 150 12510075502540 Tj [C] 0.0 3.0 IO,WDact, IO,WDdeact [mA]2.5 2.0 1.5 1.0 0.5 IO,WDdeact IO,WDact 3. 6 Watchdog activation current, Watchdog deactivation current vs. Watchdog activation threshold current adjustment resistor (Ta = +25°C) 3. 6. 1 V OUT = 3.3 V VIN = 13.5 V 3. 6. 2 V OUT = 5.0 V VIN = 13.5 V 100 10000 100010010 IO,WDact, IO,WDdeact [mA] RWADJ,ext [k] IO,WDdeact IO,WDact 100 10000 100010010 IO,WDact, IO,WDdeact [mA] RWADJ,ext [k] IO,WDdeact IO,WDact

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION S-19500/19501 Series Rev.1.2_00 Seiko Instruments Inc. 44 4. Overall 4. 1 Current consumption during operation vs. input voltage 4. 1. 1 V OUT = 3.3 V, −VDET = 2.6 V When watchdog timer is deactivated 4. 1. 2 V OUT = 5.0 V, −VDET = 4.7 V When watchdog timer is deactivated 300 0 18 ISS1 [A] VIN [V] 15963 250 200 150 100 Tj = +125°C Tj = +150°C Tj = +25°C Tj = 40°C 300 ISS1 [A] VIN [V] 250 200 150 100 0 1815963 12 Tj = +125°C Tj = +150°C Tj = +25°C Tj = 40°C 4. 2 Current consumption during operation vs. Output current 4. 2. 1 V OUT = 3.3 V, −VDET = 2.6 V VIN = 13.5 V, WADJ pin is open 4. 2. 2 V OUT = 5.0 V, −VDET = 4.7 V VIN = 13.5 V, WADJ pin is open 160 0 200 ISS1 [μA] IOUT [mA] 1601208040 120 Ta = +125°C Ta = −40°C Ta = +25°C 160 0 200 ISS1 [μA] IOUT [mA] 1601208040 120 Ta = +125°C Ta = −40°C Ta = +25°C 4. 3 Current consumption during operation vs. Junction temperature 4. 3. 1 V OUT = 3.3 V, −VDET = 2.6 V VIN = 13.5 V, WADJ pin is open 4. 3. 2 V OUT = 5.0 V, −VDET = 4.7 V VIN = 13.5 V, WADJ pin is open 160 ISS1 [μA] 120 −25 0 150 125100755025−40 Tj [°C] IOUT = 50 mAIOUT = 5 mA IOUT = 200 mA 160 ISS1 [μA] 120 −25 0 150 125100755025−40 Tj [°C] IOUT = 50 mAIOUT = 5 mA IOUT = 200 mA

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 45  Reference Data 1. Transient response characteristics when input (Ta = +25°C) 1. 1 V OUT = 3.3 V IOUT = 30 mA, CL = 2.2 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs 1. 2 VOUT = 5.0 V IOUT = 30 mA, CL = 2.2 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs 3.8 3.2 100 500 VOUT [V] 4003002001000 3.7 3.6 3.5 3.4 3.3 t [s] VIN [V] VOUT VIN 6.0 4.8 100 500 VOUT [V] 4003002001000 5.8 5.6 5.4 5.2 5.0 t [s] VIN [V] VOUT VIN 2. Transient response characteristics of load (Ta = +25°C) 2. 1 V OUT = 3.3 V VIN = 13.5 V, CL = 2.2 μF, IOUT = 50 mA ↔ 100 mA 2. 2 VOUT = 5.0 V VIN = 13.5 V, CL = 2.2 μF, IOUT = 50 mA ↔ 100 mA 3.7 3.1 100 500 VOUT [V] 4003002001000 3.6 3.5 3.4 3.3 3.2 t [s] 150 150 100 50 100 IOUT [mA] VOUT IOUT 5.8 4.6 100 500 VOUT [V] 4003002001000 5.6 5.4 5.2 5.0 4.8 t [s] 150 150 100 50 100 IOUT [mA] VOUT IOUT 3. Load dump characteristics (Ta = +25°C) 3. 1 V OUT = 5.0 V IOUT = 0.1 mA, V IN = 13.5 V ↔ 45.0 V, CIN = CL = 2.2 μF 6.0 4.8 0.1 0.9 VOUT [V] 0.40.30.20.10 5.8 5.6 5.4 5.2 5.0 t [s] 10 VIN [V] 0.5 0.6 0.7 0.8 VOUT VIN 4. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C) CIN = CL = 2.2 μF, CDLY = 47 nF 0.1 200 IOUT [mA] RESR [Ω] Stable CIN VIN VSS CL RESR S-19500 Series VOUT WO / ROWEN WI DLY CDLY WADJ *1. CL: Murata Manufacturing Co., Ltd. G C M 3 1 C R 7 1 H 2 2 5 K ( 2 . 2 μF)

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_00 S-19500/19501 Series Seiko Instruments Inc. 47 1. 3 Board 3 76.2 mm 114.3 mm Figure 54 Table 19 Item Specification Thermal resistance value (θja) 39°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 1 Land pattern and wiring for testing: t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm 1. 4 Board 4 76.2 mm 45 mm 114.3 mm 50 mm Pattern for heat radiation Figure 55 Table 20 Item Specification Thermal resistance value (θja) 37°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer

1 Pattern for heat radiation:

45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via − 1. 5 Board 5 76.2 mm 45 mm 114.3 mm 50 mm Figure 56 Table 21 Item Specification Thermal resistance value (θja) 31°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm

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Product Information

S19500 specifications and overview.

Summary

FOR AUTOMOTIVE 125C OPERATION HIGH-WITHSTAND VOLTAGE

Description

FOR AUTOMOTIVE 125C OPERATION HIGH-WITHSTAND VOLTAGE

Source title S19500 Datasheet(PDF) - Seiko Instruments Inc

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