S1142A

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www.sii-ic.com HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR © Seiko Instruments Inc., 2009-2014 Rev.4.2_00 Seiko Instruments Inc. 1 The S-1142A/B Series, developed by using high-withstand voltage CMOS technology, is a positive voltage regulator with a high-withstand voltage, low current consum ption, and high-accuracy output voltage. The S-1142A/B Series operates at a high maximum operati ng voltage of 50 V and a low cu rrent consumption of 4.0 μA typ. In addition to a built-in low on-resistance transistor which pr ovides a very small dropout voltage and a large output current, this voltage regulator also has a built-in ON / OFF circuit. An overcurrent protection circuit prevents the load current fr om exceeding the capacitance of the output transistor, and a built-in thermal shutdown circuit prevents damage caused by heat. A high heat radiation HSOP-6 package enables high-density mounting.  Features

• Output voltage: 2.0 V to 15.0 V, selectable in 0.1 V step
• Input voltage: 3.0 V to 50 V
• Output voltage accuracy: ±1.0% (Tj = +25°C)
• Current consumption: During operation: 4.0 μA typ., 9.0 μA max. (Ta = −40°C to +85°C) During power-off: 0.1 μA typ., 1.0 μA max. (Ta = −40°C to +85°C)
• Output current: Possible to output 200 mA (V IN ≥ VOUT(S) + 2.0 V)*1
• Input and output capacitors: A ceramic capacitor of 0.1 μF or more can be used.
• Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
• Built-in thermal shutdown circuit: Prevents damage caused by heat.
• Built-in ON / OFF circuit: Ensures long battery life.
• Operation temperature range: Ta = − 40°C to +85°C
• Lead-free (Sn 100%), halogen-free *1. Attention should be paid to the power dissipation of the package when the output current is large.  Application
• Constant-voltage power supply for home electric appliance  Package
• HSOP-6

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 2  Block Diagram Reference voltage circuit ON / OFF ON / OFF circuit VIN VSS VOUT Overcurrent protection circuit Thermal shutdown circuit *1. Parasitic diode Figure 1

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 3  Product Name Structure Users can select the product type and output voltage for the S-1142A/B Series. Refer to " 1. Product name " regarding the contents of product name, " 2. Package " regarding the package drawings and " 3. Product name list" for details of product names. 1. Product name S-1142 x xx I - E6T1 U Package abbreviation and IC packing specifications*1 E6T1: HSOP-6, Tape Operation temperature I: Ta = −40°C to +85°C Output voltage 20 to F0 (e.g., when the output voltage is 2.0 V, it is expressed as 20. when the output voltage is 10 V, it is expressed as A0. when the output voltage is 11 V, it is expressed as B0. when the output voltage is 12 V, it is expressed as C0. when the output voltage is 15 V, it is expressed as F0.) Product type*2 A: ON / OFF pin negative logic B: ON / OFF pin positive logic Environmental code U: Lead-free (Sn 100%), halogen-free *1. Refer to the tape drawing. *2. Refer to " 3. ON / OFF pin " in " Operation". Remark When overshoot of the S-1142A/B Series has some influences, consider to use the S-1142C/D Series. Refer to "6. Overshoot of output voltage " in " Operation" regarding details of overshoot. 2. Package Table 1 Package Drawing Codes Package Name Dimension Tape Reel Land HSOP-6 FH006-A-P-SD FH006-A-C-SD FH006-A-R-SD FH006-A-L-SD

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 4 3. Product name list Table 2 Output Voltage HSOP-6 2.0 V ± 1.0% S-1142B20I-E6T1U 2.5 V ± 1.0% S-1142B25I-E6T1U 2.7 V ± 1.0% S-1142B27I-E6T1U 2.8 V ± 1.0% S-1142B28I-E6T1U 2.85 V ± 1.0% S-1142B2JI-E6T1U 3.0 V ± 1.0% S-1142B30I-E6T1U 3.2 V ± 1.0% S-1142B32I-E6T1U 3.3 V ± 1.0% S-1142B33I-E6T1U 3.5 V ± 1.0% S-1142B35I-E6T1U 3.7 V ± 1.0% S-1142B37I-E6T1U 4.0 V ± 1.0% S-1142B40I-E6T1U 5.0 V ± 1.0% S-1142B50I-E6T1U 8.0 V ± 1.0% S-1142B80I-E6T1U 12.0 V ± 1.0% S-1142BC0I-E6T1U 12.5 V ± 1.0% S-1142BC5I-E6T1U 15.0 V ± 1.0% S-1142BF0I-E6T1U Remark Please contact our sales office for products with an output voltage other than those listed above or type A products.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 5  Pin Configuration 1. HSOP-6 13 2 465 Top view Figure 2 Table 3 Pin No. Symbol Description

1 VOUT Output voltage pin

2 VSS GND pin

3 ON / OFF ON / OFF pin

4 NC*1 No connection

5 VSS GND pin

6 VIN Input voltage pin

*1. The NC pin is electrically open. The NC pin can be connected to the VIN pin or the VSS pin.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 6  Absolute Maximum Ratings Table 4 (Ta = +25°C unless otherwise specified ) Item Symbol Absolute Maximum Rating Unit Input voltage VIN V SS − 0.3 to VSS + 60 V VON / OFF V SS − 0.3 to VIN + 0.3 V Output voltage VOUT V SS − 0.3 to VIN + 0.3 V Power dissipation PD 1900*1 mW Junction temperature Tj −40 to +125 °C Operation ambient temperature T opr −40 to +85 °C Storage temperature Tstg −40 to +125 °C *1. When mounted on board [Mounted board] (1) Board size: 50 mm × 50 mm × t1.6 mm (2) Board material: Glass epoxy resin (two layers) (3) Wiring ratio: 50% (4) Test conditions: When mounted on board (wind speed: 0 m/s) (5) Land pattern: Refer to the recommended land pattern (drawing code: FH006-A-L-SD) Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. 0 50 100 150 2400 1600 Power dissipation (PD) [mW] Ambient temperature (Ta) [°C] 800 2000 1200 400 Figure 3 Power Dissipation of Package (When Mounted on Board) Table 5 Condition Power Dissipation Thermal Resistance Value ( θj − a) HSOP-6 (When mounted on board) 1900 mW 53°C/W

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 7 Power dissipation of HSOP-6 (reference) Package power dissipation differs depending on the mounting conditions. The power dissipation characteristics under the following test conditions should be taken as reference values only. [Mounted board] (1) Board size: 50 mm × 50 mm × t1.6 mm (2) Board material: Glass epoxy resin (two layers) (3) Wiring ratio: 90% (4) Test conditions: When mounted on board (wind speed: 0 m/s) (5) Land pattern: Refer to the recommended land pattern (drawing code: FH006-A-L-SD) 0 50 100 150 2400 1600 Power dissipation (PD) [mW] Ambient temperature (Ta) [°C] 800 2000 1200 400 Figure 4 Power Dissipation of Package (When Mounted on Board) Table 6 Condition Power Dissipation (Reference) Thermal Resistance Value ( θj − a) HSOP-6 (When mounted on board) 2000 mW 50°C/W

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 8  Electrical Characteristics Table 7 (Tj = −40°C to +125°C, Ta = −40°C to +85°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Output voltage*1 VOUT(E) VIN = VOUT(S) + 1.0 V, IOUT = 30 mA, −40°C ≤ Tj ≤ +105°C VOUT(S) × 0.97 VOUT(S) VOUT(S) × 1.03 V1 Output current*2 I OUT V IN ≥ VOUT(S) + 2.0 V 200*4 − − mA 3 Dropout voltage*3 Vdrop IOUT = 100 mA Ta = +25°C 9.0 V ≤ VOUT(S) ≤ 15.0 V − 0.18 − V1 IOUT = 200 mA Ta = +25°C Line regulation OUTIN

1 OUT

V

• Δ Δ VOUT(S) + 1.0 V ≤ VIN ≤ 30 V, IOUT = 30 mA − 0.05 0.3 %/V 1 Load regulation ΔVOUT2 VIN = VOUT(S) + 1.0 V, 2.0 V ≤ VOUT(S) < 5.1 V, 0.1 mA ≤ IOUT ≤ 40 mA − 20 40 mV 1 VIN = VOUT(S) + 1.0 V, 5.1 V ≤ VOUT(S) < 12.1 V, 0.1 mA ≤ IOUT ≤ 40 mA − 20 60 mV 1 VIN = VOUT(S) + 1.0 V, 12.1 V≤ VOUT(S) ≤ 15.0 V, 0.1 mA ≤ IOUT ≤ 40 mA − 20 80 mV 1 Current consumption during operation ISS1 VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON, no load − 4.0 9.0 μA 2 Current consumption during power-off ISS2 VIN = VOUT(S) + 1.0 V, ON / OFF pin = OFF, no load − 0.1 1.0 μA 2 Input voltage V IN − 3.0 − 50 V − ON / OFF pin input voltage "H" V SH VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ, determined by VOUT output level 1.5 − − V4 ON / OFF pin input voltage "L" V SL VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ, determined by VOUT output level − − 0.3 V 4 ON / OFF pin input current "H" I SH VIN = VOUT(S) + 1.0 V, VON / OFF = VOUT(S) + 1.0 V −0.1 − 0.1 μA 4 ON / OFF pin input current "L" ISL VIN = VOUT(S) + 1.0 V, VON / OFF = 0 V −0.1 − 0.1 μA 4 Ripple rejection |RR| VIN = VOUT(S) + 1.0 V, f = 100 Hz, ΔVrip = 0.5 Vrms, IOUT = 30 mA, Ta = +25°C 2.0 V ≤ VOUT(S) < 2.3 V − 50 − dB 5 2.3 V ≤ VOUT(S) < 3.6 V − 45 − dB 5 3.6 V ≤ VOUT(S) < 6.1 V − 40 − dB 5 6.1 V ≤ VOUT(S) < 10.1 V − 35 − dB 5 10.1 V ≤ VOUT(S) ≤ 15.0 V − 30 − dB 5 Short-circuit current I short VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON, VOUT = 0 V, Ta = +25°C − 80 − mA 3 Thermal shutdown detection temperature TSD Junction temperature − 150 − ° C − Thermal shutdown release temperature TSR Junction temperature − 125 − ° C −

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 9 *1. V OUT(S): Set output voltage VOUT(E): Actual output voltage The output voltage when fixing I OUT (= 30 mA) and inputting V OUT(S) + 1.0 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) VOUT3 is the output voltage when V IN = VOUT(S) + 2.0 V, and IOUT = 100 mA or 200 mA. 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 package power dissipation, this valu e may not be satisfied. Attention should be paid to the power dissipation of the package when the output current is large. This specification is guaranteed by design.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 11  Standard Circuit CIN *1 CL Input Output GNDSingle GND VOUTVIN VSS ON / OFF *1. CIN is a capacitor for stabilizing the input. *2. A ceramic capacitor of 0.1 μF or more can be used as C L. Figure 10 Caution The above connection diagram and constants will not guarantee successful operation. Perform thorough evaluation using an actual application to set the constants.  Condition of Application Input capacitor (C IN): 0.1 μF or more Output capacitor (CL): 0.1 μF 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-1142A/B Series requires an output capacitor between the VOUT pin and the VSS pin for phase compensation. Operation is stabilized by a ceramic capa citor with an output capacitance of 0.1 μF or more over the entire temperature range. When using an OS capacitor, a tant alum capacitor, or an aluminum electrol ytic capacitor, the capacitance must be 0.1 μF or more. 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 capacitor differs depending on the application. Set the value for input capacitor (C IN) and output capacitor (C L) as follows. CIN ≥ 0.1 μF CL ≥ 0.1 μF Caution Define the capacity values of C IN and C L by sufficient evaluation including the temperature characteristics under the actual usage conditions.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 12  Explanation of Terms 1. Low dropout voltage regulator This voltage regulator has the low dropout volta ge due to its built-in low on-resistance transistor. 2. Output voltage (V OUT) The accuracy of the outpu t voltage is ensured at ±3.0% under specified conditio ns 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 "  Electrical Characteristics" and " Characteristics (Typical Data)" for details. 3. Line regulation  ΔVOUT1 ΔVIN • VOUT Indicates the dependency of the output voltage against the input voltage. That 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. 4. Load regulation ( ΔVOUT2) Indicates the dependency of the output voltage against the 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. 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 volt age has dropped out to the valu e of 98% of output voltage (V OUT3), which is at V IN = VOUT(S) + 2.0 V. Vdrop = VIN1 − (VOUT3 × 0.98)

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 14 3. ON / OFF pin This pin starts and stops the regulator. When the ON / OFF pin is set to the OFF level, the entire internal circuit stops operating, and the built-in P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing cu rrent consumption significantly. The VOUT pin is set to the V SS level by the internal divi ding resistor of several M Ω between the VOUT pin and the VSS pin. Note that the current consumption incr eases when a voltage of 0.3 V to V IN − 0.3 V is applied to the ON / OFF pin. The ON / OFF pin is configured as shown in Figure 12. Since the ON / OFF pin is neither pulled down nor pulled up internally, do not use it in the floatin g status. When not using the ON / OFF pi n, connect it to the VSS pin in the product A type, and connect it to the VIN pin in the B type. Table 8 Product Type ON / OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption A "L": ON Operate Set value I SS1 A "H": OFF Stop V SS level ISS2 B "L": OFF Stop V SS level ISS2 B "H": ON Operate Set value I SS1 VSS ON / OFF VIN Figure 12 4. Overcurrent protection circuit The S-1142A/B Series includes an overcurrent protection circuit which having the characteristics shown in "1. Output voltage vs. Output current (When load current increases) (Ta = +25°C)" in "  Characteristics (Typical Data) ", in order to protect the output transistor against an excessive output current and short circuiting between the VOUT pin and the VSS pin. The current w hen the output pin is short-circuited (I short) is internally set at approx. 80 mA typ., and the normal value is restored for the output voltage, if releasing a short circuit once. Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps short circuiting inside, pay attention to the conditions of input voltage and load current so that, under the usage conditions including short circuit, the loss of the IC will not exceed power dissipation of the package.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 15 5. Thermal shutdown circuit The S-1142A/B Series has a thermal shutdown circuit to protect the device from damage due to overheat. When the junction temperature rises to 150 °C typ., the thermal shutdown circuit operates to stop regulating. When the junction temperature drops to 125 °C typ., the thermal shutdown circuit is released to restart regulating. Due to self-heating of the S-1142A/B Series, if the thermal shutdown circuit starts operating, it stops regulating so that the output voltage drops. When regulation stops, the S-1142A/B Seri es does not itself generate heat and the IC’s temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus this IC generates heat again. R epeating this procedure makes the wa veform of the output voltage into a pulse-like form. Stop or restart of regul ation continues unless decreasing either or both of the input voltage and the output current in order to reduce the internal power consumption, or decreasing the ambient temperature. Table 9 Thermal Shutdown Circuit VOUT Pin Voltage Operate: 150°C typ.*1 VSS level Release: 125°C typ.*1 Set value *1. Junction temperature

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 17  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 driver when a series regulator is used at high temperature.
• Note that the output voltage may increase due to the leakage current from an output driver even if the ON / OFF pin is at OFF level 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-1142A/B Series. Howe ver, be sure to perform sufficient evaluation under the actual usage conditions for selection, including ev aluation of temperature characteristics. Refer to " 6. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)" in " Reference Data " for the equivalent series resistance (R ESR) of the output capacitor. Input capacitor (C IN): 0.1 μF or more Output capacitor (C L): 0.1 μF or more
• The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is small or an input capacitor is not connected.
• Sufficiently evaluate the output voltage fluctuations caus ed by the power supply or the load fluctuations with the actual device.
• 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 power-on with the actual device.
• The application conditions for the input voltage, the output voltage, and the load current should not exceed the package power dissipation.
• Do not apply an electrostatic discharge to this IC that exceeds 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 7 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.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 18  Characteristics (Typical Data) 1. Output voltage vs. Output current (When load current increases) (Ta = +25°C) 1. 1 V OUT = 2.0 V 1. 2 V OUT = 5.0 V 100 200 300 400 500 600 700 8000 2.5 1.0 0.5 1.5 2.0 13.5 V 4.0 V VOUT [V] IOUT [mA] VIN = 3.0 V 100 200 300 400 500 600 700 8000 VOUT [V] IOUT [mA] 13.5 V 6.0 V 7.0 V VIN = 5.5 V 1. 3 V OUT = 12.0 V 100 200 300 400 500 600 700 8000 VOUT [V] IOUT [mA] 13.5 V 13.0 V VIN = 12.5 V Remark In determining the output current, attention should be paid to the following. 1. The minimum output current value and footnote *4 of Table 7 in the " Electrical Characteristics" 2. Power dissipation of the package 2. Output voltage vs. Input voltage (Ta = +25°C) 2. 1 V OUT = 2.0 V 2. 2 V OUT = 5.0 V 5 1 01 52 02 53 00 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 VOUT [V] VIN [V] 50 mA IOUT = 1 mA 30 mA 5 1 01 52 02 53 00 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4.5 VOUT [V] VIN [V] 50 mA IOUT = 1 mA 30 mA 2. 3 V OUT = 12.0 V 15 20 25 3010 12.4 12.2 12.0 11.8 11.6 11.4 11.2 11.0 VOUT [V] VIN [V] 50 mA IOUT = 1 mA 30 mA

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 19 3. Dropout voltage vs. Output current 3. 1 V OUT = 2.0 V 3. 2 V OUT = 5.0 V 50 100 150 200 2500 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 Vdrop [V] IOUT [mA] +25C 40C Tj = +125C 50 100 150 200 2500 0.7 0.6 0.5 0.4 0.3 0.2 0.1 I OUT [mA] 25C 40C Tj = 125C Vdrop [V] 3. 3 V OUT = 12.0 V 50 100 150 200 2500 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 I OUT [mA] 25C 40C Tj = 125C Vdrop [V] 4. Dropout voltage vs. Temperature 4. 1 V OUT = 2.0 V 4. 2 V OUT = 5.0 V 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 40 25 0 25 50 75 100 125 Tj [C] IOUT = 100 mA 10 mA Vdrop [V] 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 40 25 0 25 50 75 100 125 Tj [C] IOUT = 100 mA 10 mA Vdrop [V] 4. 3 V OUT = 12.0 V 40 25 0 25 50 75 100 125 0.30 Tj [C] 0.25 0.20 0.15 0.10 0.05 IOUT = 100 mA 10 mA Vdrop [V]

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 20 5. Dropout voltage vs. Set output voltage (Tj = +25°C) 2468 1 0 1 2 1 40 0.6 0.4 0.2 0.8 1.0 1.2 Vdrop [V] VOUT(S) [V] 100 mA 30 mA 10 mA 1 mA IOUT = 200 mA 6. Output voltage vs. Temperature 6. 1 V OUT = 2.0 V VIN = 3.0 V 6. 2 V OUT = 5.0 V VIN = 6.0 V 40 25 0 25 50 75 100 125 2.04 2.02 2.00 1.98 1.96 Tj [C] VOUT [V] 5.2 5.1 5.0 4.9 4.8 40 25 0 25 50 75 100 125 Tj [C] VOUT [V] 6. 3 V OUT = 12.0 V VIN = 13.0 V 12.4 12.2 12.0 11.8 11.6 40 25 0 25 50 75 100 125 Tj [C] VOUT [V]

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 21 7. Current consumption during operation vs. Input voltage (When ON / OFF pin is ON, no load) 7. 1 V OUT = 2.0 V 7. 2 V OUT = 5.0 V 5 1 01 52 02 53 00 ISS1 [A] VIN [V] 25C 40C Tj = 125C ISS1 [A] VIN [V] 5 1 01 52 02 53 00 ISS1 [A] VIN [V] 25C 40C Tj = 125C 7. 3 V OUT = 12.0 V 5 1 01 52 02 53 00 ISS1 [A] VIN [V] 25C 40C Tj = 125C 8. Current consumption during operation vs. Temperature 8. 1 V OUT = 2.0 V VIN = 3.0 V 8. 2 V OUT = 5.0 V VIN = 6.0 V 6.0 2.5 5.5 5.0 4.5 4.0 3.5 3.0 40 25 0 25 50 75 100 125 Tj [C] ISS1 [A] 6.0 2.5 5.5 5.0 4.5 4.0 3.5 3.0 40 25 0 25 50 75 100 125 Tj [C] ISS1 [A] 8. 3 V OUT = 12.0 V VIN = 13.0 V 6.0 2.5 5.5 5.0 4.5 4.0 3.5 3.0 40 25 0 25 50 75 100 125 Tj [C] ISS1 [A]

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 22 9. Current consumption during operation vs. Output current (Ta = +25°C) 9. 1 V OUT = 2.0 V 9. 2 V OUT = 5.0 V 25 50 75 100 125 1500 160 140 120 100 ISS1 [A] IOUT [mA] 3.0 V VIN = 13.5 V 25 50 75 100 125 1500 160 140 120 100 ISS1 [A] IOUT [mA] 6.0 V VIN = 13.5 V 9. 3 V OUT = 12.0 V 25 50 75 100 125 1500 160 140 120 100 ISS1 [A] IOUT [mA] 13.0 V VIN = 20.0 V 10. Output current vs. Input voltage *1 10. 1 V OUT = 3.3 V 10. 2 V OUT = 5.0 V 10 20 30 40 500 250 IOUT [mA] VIN [V] 200 150 100 +25C Ta = +85C 10 20 30 40 500 250 IOUT [mA] VIN [V] 200 150 100 +25C Ta = +85C *1. When mounted on board [Mounted board] (1) Board size: 50 mm × 50 mm × t1.6 mm (2) Board material: Glass epoxy resin (two layers) (3) Wiring ratio: Surface approx. 75%, reverse side approx. 90% (4) Through hole: Diameter 0.5 mm × 24

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 23 11. Ripple rejection (Ta = +25°C) 11. 1 V OUT = 2.0 V VIN = 13.5 V, CL = 0.1 μF 11. 2 V OUT = 5.0 V VIN = 13.5 V, CL = 0.1 μF 100 1k 10k Ripple Rejection [dB] Frequency [Hz] 10 1M 100k IOUT = 1 mA 30 mA 100 mA 100 1k 10k Ripple Rejection [dB] Frequency [Hz] 10 1M 100k IOUT = 1 mA 30 mA 100 mA 11. 3 V OUT = 12.0 V VIN = 13.5 V, CL = 0.1 μF 100 1k 10k Ripple Rejection [dB] Frequency [Hz] 10 1M 100k IOUT = 1 mA 30 mA 100 mA

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 24  Reference Data 1. Characteristics of input transient response (Ta = +25°C) 1. 1 V OUT = 2.0 V IOUT = 30 mA, CIN = 0.1 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs 1. 2 V OUT = 5.0 V IOUT = 30 mA, CIN = 0.1 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 VIN [V] 2.5 2.4 2.3 2.2 2.1 2.0 1.9 CL = 10 μF 22 μF VIN VOUT 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 VIN [V] 6.0 5.8 5.6 5.4 5.2 5.0 4.8 CL = 10 μF 22 μF VIN VOUT 1. 3 V OUT = 12.0 V IOUT = 30 mA, CIN = 0.1 μF, VIN = 13.5 V ↔ 15.5 V, tr = tf = 5.0 μs 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 VIN [V] 13.2 11.8 13.0 12.8 12.6 12.4 12.2 12.0 CL = 10 μF 22 μF VIN VOUT 2. Characteristics of load transient response (Ta = +25°C) 2. 1 V OUT = 2.0 V VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA ↔ 100 mA 2. 2 V OUT = 5.0 V VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA ↔ 100 mA 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 IOUT [mA] 2.4 150 100 50 100 150 2.3 2.2 2.1 2.0 1.9 1.8 CL = 10 μF 22 μF VOUT IOUT 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 IOUT [mA] 5.8 150 100 50 100 150 5.6 5.4 5.2 5.0 4.8 4.6 CL = 10 μF 22 μF VOUT IOUT 2. 3 V OUT = 12.0 V VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA ↔ 100 mA 0 200 VOUT [V] t [μs] 200 600400 800 1000 1200 14.0 150 100 50 100 150 13.5 13.0 12.5 12.0 11.5 11.0 IOUT [mA]CL = 22 μF 10 μF VOUT IOUT

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 25 3. Transient response characteristics of ON / OFF pin (Ta = + 25°C) 3. 1 V OUT = 3.3 V VIN = 13.5 V, CL = 10 μF, CIN = 0.1 μF, IOUT = 100 mA, VON / OFF = 0 V → 13.5 V 3. 2 V OUT = 5.0 V VIN = 13.5 V, CL = 10 μF, CIN = 0.1 μF, IOUT = 100 mA, VON / OFF = 0 V → 13.5 V VOUT [V]6 12 VON/OFF [V] 18 t [μs] 0 500500 1000 1500 2000 VOUT VON/OFF VOUT [V] VON/OFF [V] t [μs] 0 500500 1000 1500 2000 12 18 VOUT VON/OFF 4. Load transient response characteristics dependent on capacitance (Ta = +25°C) 4. 1 V OUT = 5.0 V VIN = 13.5 V, CIN = 0.1 μF, IOUT = 50 mA → 100 mA VIN = 13.5 V, CIN = 0.1 μF, IOUT = 100 mA → 50 mA 20 40 60 80 1000 0.5 Undershoot [V] CL [μF] 0.4 0.3 0.2 0.1 20 40 60 80 1000 0.5 Overshoot [V] CL [μF] 0.4 0.3 0.2 0.1 5. Input transient response characteristics dependent on capacitance (Ta = +25°C) 5. 1 V OUT = 5.0 V VIN = 7.0 V → 12.0 V, tr = 5.0 μs, CIN = 0.1 μF, IOUT = 30 mA VIN = 12.0 V → 7.0 V, tr = 5.0 μs, CIN = 0.1 μF, IOUT = 30 mA 20 40 60 80 1000 0.7 Overshoot [V] CL [μF] 0.6 0.5 0.4 0.3 0.2 0.1 20 40 60 80 1000 0.7 Undershoot [V] CL [μF] 0.6 0.5 0.4 0.3 0.2 0.1

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1142A/B Series Rev.4.2_00 Seiko Instruments Inc. 26 6. Example of equivalent series resistan ce vs. Output current characteristics (Ta = +25°C) 100 0.1 200 IOUT [mA] RESR [Ω] CIN = CL = 0.1 μF Stable CIN VIN VSS CL RESR S-1142 A/B Series VOUT ON / OFF *1. CL: TDK Corporation C3216X8R2A104K (0.1 μF) Figure 15 Figure 16

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.4.2_00 S-1142A/B Series Seiko Instruments Inc. 27  Marking Specification 1. HSOP-6 (1) (2) (3) (4) (7) (8) (9) (10) (13) (14) (5) (6) (11) (12) (15) (16) Top view 654 123 (1) to (5): Product name: S1142 (Fixed) (6): Product type (7), (8): Value of output voltage (9): Operation temperature (10) to (16): Lot number

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