S1721

S1721 SII | Alldatasheet

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www.sii-ic.com SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR © Seiko Instruments Inc., 2007-2010 Rev.2.0_00 Seiko Instruments Inc. 1 S-1721 Series, developed using the CMOS technology, is a 2- channel positive voltage regulat or IC which has the low dropout voltage, the high-accuracy output voltage and the low output current consumption of 150 mA. Users are able to use a sma ll ceramic capacitor of 1.0 μF for this IC. This IC includes two regulator circuits in the package SOT-23-6 or super-small SNT-6A. S-1721 Series has much lower current consumption than S-1711 Series, this IC is ideal for mobile devices. „ Features

• Output voltage: 1.2 V to 5.0 V, selectable in 0.05 V step.
• A ceramic capacitor of 1.0 μF or more can be used as the I/O capacitor.
• Wide input voltage range: 1.7 V to 6.5 V
• High-accuracy output voltage: ±1.0%
• Low dropout voltage: 130 mV typ. (products having the output of 3.0 V, IOUT = 100 mA)
• Low current consumption: During operation: 25 μA typ., 45 μA max. (products having the output of

3.0 V, per circuit)

During shutdown: 0.1 μA typ., 1.0 μA max.

• Output current: Possible to output 150 mA (at VIN ≥ VOUT(S) + 1.0 V)*1 (per circuit)
• High ripple rejection: 80 dB typ. (products having the output under 1.8 V, at 1.0 kHz)
• Built-in overcurrent protector: lim its overcurrent of output transistor
• Built-in ON/OFF circuit: Ensures long battery life.
• Pull-up or pull-down resistor can be selected.
• Lead-free, Sn 100%, halogen-free*2 *1. Attention should be paid to the power dissipation of the package when the output current is large. *2. Refer to “„ Product Name Structure” for details. „ Applications
• Power supply for cellular phones
• Power supply for battery-powered devices „ Packages
• SNT-6A
• SOT-23-6

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 6 „ Product Name Structure Users can select the product type, output voltage, and package type fo r the S-1721 Series. Refer to “1. Product name” regarding the contents of product name, “ 2. Function list of product type ” regarding the product type, “3. Package” regarding the package drawings and “4. Product name list” regarding details of product name. 1. Product name 1. 1 SNT-6A S-1721 x xx xx - I6T1 x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) Package abbreviation and IC packing specifications *1 I6T1: SNT-6A, tape product Output voltage of voltage regulator 2 *3 12 to 50 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) Output voltage of voltage regulator 1 *3 12 to 50 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) Product type A to H *1. Refer to the tape specifications. *2. Refer to “2. Function list of product type ”. *3. If you request the product which has 0.05 V step, contact our sales office. 1. 2 SOT-23-6 S-1721 x xx xx - M6T1 x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) Package abbreviation and IC packing specifications *1 M6T1: SOT-23-6, tape product Output voltage of voltage regulator 2 *3 12 to 50 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) Output voltage of voltage regulator 1 *3 12 to 50 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) Product type A to H *1. Refer to the tape specifications. *2. Refer to “2. Function list of product type ”. *3. If you request the product which has 0.05 V step, contact our sales office.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 7 2. Function list of product type Table 1 Product Type ON/OFF Logic Pull-up Resistor Pull-down Resistor A type 1ch Active “H” 2ch Active “H” 1ch None 2ch None 1ch Available 2ch Available B type 1ch Active “H” 2ch Active “L” 1ch None 2ch Available 1ch Available 2ch None C type 1ch Active “L” 2ch Active “H” 1ch Available 2ch None 1ch None 2ch Available D type 1ch Active “L” 2ch Active “L” 1ch Available 2ch Available 1ch None 2ch None E type 1ch Active “H” 2ch Active “H” 1ch None 2ch None 1ch None 2ch None F type 1ch Active “H” 2ch Active “L” 1ch None 2ch None 1ch None 2ch None G type 1ch Active “L” 2ch Active “H” 1ch None 2ch None 1ch None 2ch None H type 1ch Active “L” 2ch Active “L” 1ch None 2ch None 1ch None 2ch None 3. Package Drawing Code Package Name Package Tape Reel Land SNT-6A PG006-A-P-SD PG006-A-C-SD PG006-A-R-SD PG006-A-L-SD SOT-23-6 MP006-A-P-SD MP006-A-C-SD MP006-A-R-SD −

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 8 4. Product name list

4.1 S-1721 series A type

ON/OFF logic : 1ch : Active “H”, 2ch : Active “H” Pull-up resistor : 1ch : None, 2ch : None Pull-down resistor : 1ch : Available, 2ch : Available Table 2 (1 / 2) Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 1.2 V ±15 mV 1.2 V ±15 mV S-1721A1212-I6T1x S-1721A1212-M6T1x 1.2 V ±15 mV 1.5 V ±1.0% S-1721A1215-I6T1x S-1721A1215-M6T1x 1.2 V ±15 mV 1.8 V ±1.0% S-1721A1218-I6T1x − 1.2 V ±15mV 2.5 V ±1.0% S-1721A1225-I6T1x − 1.2 V ±15 mV 2.6 V ±1.0% S-1721A1226-I6T1x − 1.2 V ±15 mV 2.8 V ±1.0% S-1721A1228-I6T1x S-1721A1228-M6T1x 1.2 V ±15 mV 2.85 V ±1.0% S-1721A122J-I6T1x − 1.2 V ±15 mV 3.0 V ±1.0% S-1721A1230-I6T1x − 1.2 V ±15 mV 3.3 V ±1.0% S-1721A1233-I6T1x S-1721A1233-M6T1x 1.25 V ±15 mV 1.8 V ±1.0% S-1721A1C18-I6T1x − 1.3 V ±15 mV 2.8 V ±1.0% − S-1721A1328-M6T1x 1.3 V ±15 mV 3.0 V ±1.0% − S-1721A1330-M6T1x 1.5 V ±1.0% 1.2 V ±15 mV S-1721A1512-I6T1x − 1.5 V ±1.0% 1.3 V ±15 mV S-1721A1513-I6T1x − 1.5 V ±1.0% 2.85 V ±1.0% S-1721A152J-I6T1x − 1.5 V ±1.0% 3.0 V ±1.0% S-1721A1530-I6T1x S-1721A1530-M6T1x 1.5 V ±1.0% 3.3 V ±1.0% S-1721A1533-I6T1x S-1721A1533-M6T1x 1.8 V ±1.0% 1.2 V ±15 mV S-1721A1812-I6T1x − 1.8 V ±1.0% 2.5 V ±1.0% S-1721A1825-I6T1x S-1721A1825-M6T1x 1.8 V ±1.0% 2.8 V ±1.0% S-1721A1828-I6T1x S-1721A1828-M6T1x 1.8 V ±1.0% 2.85 V ±1.0% S-1721A182J-I6T1x − 1.8 V ±1.0% 3.0 V ±1.0% S-1721A1830-I6T1x S-1721A1830-M6T1x 1.8 V ±1.0% 3.3 V ±1.0% S-1721A1833-I6T1x S-1721A1833-M6T1x 2.0 V ±1.0% 2.0 V ±1.0% S-1721A2020-I6T1x S-1721A2020-M6T1x 2.5 V ±1.0% 1.2 V ±15 mV S-1721A2512-I6T1x − 2.5 V ±1.0% 1.8 V ±1.0% S-1721A2518-I6T1x S-1721A2518-M6T1x

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 9 Table 2 (2 / 2) Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 2.5 V ±1.0% 2.8 V ±1.0% S-1721A2528-I6T1x S-1721A2528-M6T1x 2.5 V ±1.0% 2.85 V ±1.0% S-1721A252J-I6T1x − 2.6 V ±1.0% 1.3 V ±15 mV S-1721A2613-I6T1x − 2.8 V ±1.0% 1.2 V ±15 mV S-1721A2812-I6T1x S-1721A2812-M6T1x 2.8 V ±1.0% 1.5 V ±1.0% S-1721A2815-I6T1x S-1721A2815-M6T1x 2.8 V ±1.0% 1.8 V ±1.0% S-1721A2818-I6T1x S-1721A2818-M6T1x 2.8 V ±1.0% 2.8 V ±1.0% S-1721A2828-I6T1x S-1721A2828-M6T1x 2.8 V ±1.0% 2.85 V ±1.0% S-1721A282J-I6T1x − 2.8 V ±1.0% 3.0 V ±1.0% S-1721A2830-I6T1x S-1721A2830-M6T1x 2.8 V ±1.0% 3.3 V ±1.0% S-1721A2833-I6T1x S-1721A2833-M6T1x 2.85 V ±1.0% 1.2 V ±15 mV S-1721A2J12-I6T1x − 2.85 V ±1.0% 1.5 V ±1.0% S-1721A2J15-I6T1x − 2.85 V ±1.0% 1.8 V ±1.0% S-1721A2J18-I6T1x − 2.85 V ±1.0% 2.85 V ±1.0% S-1721A2J2J-I6T 1x S-1721A2J2J-M6T1x 2.85 V ±1.0% 3.3 V ±1.0% S-1721A2J33-I6T1x − 3.3 V ±1.0% 1.2 V ±15 mV − S-1721A3312-M6T1x 3.3 V ±1.0% 1.8 V ±1.0% S-1721A3318-I6T1x S-1721A3318-M6T1x 3.3 V ±1.0% 3.3 V ±1.0% S-1721A3333-I6T1x S-1721A3333-M6T1x Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 10

4.2 S-1721 series B type

ON/OFF logic : 1ch : Active “H”, 2ch : Active “L” Pull-up resistor : 1ch : None, 2ch : Available Pull-down resistor : 1ch : Available, 2ch : None Table 3 Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 1.8 V ±1.0% 1.2 V ±15 mV S-1721B1812-I6T1x − 2.85 V ±1.0% 2.85 V ±1.0% S-1721B2J2J-I6T1x −

4.3 S-1721 series C type

ON/OFF logic : 1ch : Active “L”, 2ch : Active “H” Pull-up resistor : 1ch : Available, 2ch : None Pull-down resistor : 1ch : None, 2ch : Available Table 4 Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 2.85 V ±1.0% 2.85 V ±1.0% S-1721C2J2J-I6T 1x S-1721C2J2J-M6T1x

4.4 S-1721 series D type

ON/OFF logic : 1ch : Active “L”, 2ch : Active “L” Pull-up resistor : 1ch : Available, 2ch : Available Pull-down resistor : 1ch : None, 2ch : None Table 5 Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 3.3 V ±1.0% 1.8 V ±1.0% S-1721D3318-I6T1x S-1721D3318-M6T1x Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 11

4.5 S-1721 series E type

ON/OFF logic : 1ch : Active “H”, 2ch : Active “H” Pull-up resistor : 1ch : None, 2ch : None Pull-down resistor : 1ch : None, 2ch : None Table 6 Voltage Regulator 1 Output Voltage Voltage Regulator 2 Output Voltage SNT-6A SOT-23-6 1.3 V ±15 mV 2.8 V ±1.0% S-1721E1328-I6T1x − 1.5 V ±1.0% 2.8 V ±1.0% S-1721E1528-I6T1x S-1721E1528-M6T1x 1.8 V ±1.0% 2.8 V ±1.0% S-1721E1828-I6T1x S-1721E1828-M6T1x 1.8 V ±1.0% 3.3 V ±1.0% S-1721E1833-I6T1x S-1721E1833-M6T1x 2.8 V ±1.0% 1.3 V ±15 mV − S-1721E2813-M6T1x 2.8 V ±1.0% 1.8 V ±1.0% S-1721E2818-I6T1x S-1721E2818-M6T1x 2.8 V ±1.0% 3.3 V ±1.0% S-1721E2833-I6T1x S-1721E2833-M6T1x 2.85 V ±1.0% 2.5 V ±1.0% S-1721E2J25-I6T1x S-1721E2J25-M6T1x 2.85 V ±1.0% 2.85 V ±1.0% S-1721E2J2J-I6T1x − 3.0 V ±1.0% 1.2 V ±15 mV S-1721E3012-I6T1x − 3.3 V ±1.0% 1.2 V ±15 mV − S-1721E3312-M6T1x Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 12 „ Pin Configurations Table 7 Pin No. Symbol Description

1 ON/OFF2 ON/OFF pin 2

2 VIN Input voltage pin

3 ON/OFF1 ON/OFF pin 1

4 VSS GND pin

5 VOUT1 Output voltage pin 1

6 VOUT2 Output voltage pin 2

Pin No. Symbol Description

1 ON/OFF1 ON/OFF pin 1

3 ON/OFF2 ON/OFF pin 2

4 VOUT2 Output voltage pin 2

5 VSS GND pin

6 VOUT1 Output voltage pin 1

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 13 „ Absolute Maximum Ratings Table 9 (Ta = 25°C unless otherwise specified) Item Symbol Absolute Maximum Rating Unit VIN V SS − 0.3 to VSS + 7.0 V Input voltage VON/OFF1, 2 V SS − 0.3 to VIN + 0.3 V Output voltage VOUT1, 2 V SS − 0.3 to VIN + 0.3 V SNT-6A 400*1 mW Power dissipation SOT-23-6 PD 650*1 mW Operating 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 : 114.3 mm × 76.2 mm × t1.6 mm (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding whic h the product could suffer physical damage. These values must therefore not be exceeded under any conditions. 0 50 100 150 400 200 700 300 100 SNT-6A SOT-23-6 500 600 Power Dissipation (PD) [mW] Ambient Temperature (Ta) [°C] Figure 11 Power Dissipation of Package (when mounted on board)

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 14 „ Electrical Characteristics Table 10 Voltage regulator 1 and voltage regulator 2 (per circuit) (Ta = 25 °C unless otherwise specified) Item Symbol Conditions Min. Typ. Max. Unit Test Circuit 1.2 V ≤ VOUT(S) < 1.5 V VOUT(S) − 0.015 VOUT(S) VOUT(S) + 0.015 V 2, 3 Output voltage*1 VOUT(E) VIN = VOUT(S) + 1.0 V, IOUT = 30 mA 1.5 V ≤ VOUT(S) ≤ 5.0 V VOUT(S) × 0.99 VOUT(S) VOUT(S) × 1.01 V 2, 3 Output current*2 IOUT V IN ≥ VOUT(S) + 1.0 V 150*5 ⎯ ⎯ mA 4, 5 1.5 V ≤ VOUT(S) < 1.7 V ⎯ 0.26 0.39 V 2, 3 1.7 V ≤ VOUT(S) < 2.0 V ⎯ 0.20 0.35 V 2, 3 2.0 V ≤ VOUT(S) < 2.8 V ⎯ 0.16 0.24 V 2, 3 Dropout voltage*3 Vdrop I OUT = 100 mA 2.8 V ≤ VOUT(S) ≤ 5.0 V ⎯ 0.13 0.23 V 2, 3 Line regulation OUT IN OUT1 V V V

• Δ Δ VOUT(S) + 0.5 V ≤ VIN ≤ 6.5 V, IOUT = 30 mA ⎯ 0.05 0.2 %/V 2, 3 Load regulation ΔVOUT2 V IN = VOUT(S) + 1.0 V, 100 μA ≤ IOUT ≤ 100 mA ⎯ 20 40 mV 2, 3 Output voltage temperature coefficient*4 OUT OUT V Ta V
• Δ Δ VIN = VOUT(S) + 1.0 V, IOUT = 30 mA, VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load 1.2 V ≤ VOUT(S) < 1.5 V ⎯ 35 45 μA 1 VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load 1.5 V ≤ VOUT(S) < 1.8 V ⎯ 32 45 μA 1 Current consumption during operation (per circuit) I SS1 VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load 1.8 V ≤ VOUT(S) ≤ 5.0 V ⎯ 25 45 μA 1 Current consumption during shutdown I SS2 V IN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load ⎯ 0.1 1.0 μA 1 Input voltage VIN ⎯ 1.7 ⎯ 6.5 V 1 ON/OFF pin input voltage “H” V SH V IN = VOUT(S) + 1.0 V, RL = 1.0 kΩ 1.2 ⎯ ⎯ V 6, 7 ON/OFF pin input voltage “L” V SL V IN = VOUT(S) + 1.0 V, RL = 1.0 kΩ ⎯ ⎯ 0.3 V 6, 7 B (2ch)/C (1ch)/D/E/F/G/H type −0.1 ⎯ 0.1 μA ON/OFF pin input current “H” I SH VIN = 6.5 V, VON/OFF = 6.5 V A/B (1ch)/C (2ch) type 1.0 2.5 4.2 μA 6, 7 A/B (1ch)/C (2ch)/E/F/G/H type −0.1 ⎯ 0.1 μA ON/OFF pin input current “L” I SL VIN = 6.5 V, VON/OFF = 0 V B (2ch)/C (1ch)/D type 1.0 2.5 4.2 μA 6, 7 1.2 V ≤ VOUT(S) < 1.8 V ⎯ 80 ⎯ dB 8, 9 1.8 V ≤ VOUT(S) < 3.1 V ⎯ 75 ⎯ dB 8, 9 Ripple rejection RR VIN = VOUT(S) + 1.0 V, f = 1.0 kHz, ΔVrip = 0.5 Vrms, IOUT = 30 mA 3.1 V ≤ VOUT(S) ≤ 5.0 V ⎯ 70 ⎯ dB 8, 9 Short-circuit current I short V IN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V ⎯ 150 ⎯ mA 4, 5 Shutdown pull-up/pull- down resistor R PD ⎯ 1.5 2.6 6.5 M Ω 6, 7

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 15 *1. VOUT(S): Specified output voltage VOUT(E): Actual output voltage at the fixed load Output voltage when fixing I OUT(= 30 mA) and inputting VOUT(S) +1.0 V *2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current. *3. Vdrop = VIN1 − (VOUT3 × 0.98) V OUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 100 mA. VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage. *4. The change in temperature [mV/°C] is calculated using the following equation. [] [ ] [] 1000C ppm/VΔTa ΔVV V C mV/ΔTa ΔV OUT OUT OUT(S) OUT *1. Change in temperature of the output voltage *2. Specified output voltage *3. Output voltage temperature coefficient *5. The output current can be at least this value. Due to restrictions on the package power dissipation, this va lue 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.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 18 „ Standard Circuit *1. C IN is a capacitor for stabilizing the input. *2. A ceramic capacitor of 1.0 μF or more can be used for CL1 and CL2. VOUT1 ON/OFF1 ON/OFF2 GND VIN VOUT2 Single GND OUTPUT 1 INPUT VSS OUTPUT 2 CL2 CL1 *2 CIN Figure 21 Caution The above connection diag ram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. „ Condition of Application Input capacitor (CIN) : 1.0 μF or more Output capacitor (CL1, CL2) : 1.0 μF or more (ceramic capacitor) Caution A general series regulator may oscillate, depending on the external components. Confirm that no oscillation occurs in the application for which the above capacitors are used. „ Selection of Input and Output Capacitors (CIN, CL1, CL2) The S-1721 Series requires an output c apacitor between the VOUT and VSS pin for phase compensation. Operation is stabilized by a ceramic capacitor with an output c apacitance of 1.0 μF or more over the ent ire temperature range. When using an OS capacitor, tantalum c apacitor, or aluminum electrolytic capacitor, the capac itance must be 1.0 μF or more. The value of the output ov ershoot or undershoot transient response varies depending on the value of the output capacitor. The required capacitance of the input capacitor differs depending on the application. The recommended capacitance for an application is C IN ≥ 1.0 μF, CL1 ≥ 1.0 μF, CL2 ≥ 1.0 μF; however, when selecting the output capacitor, perform sufficient ev aluation, including evaluation of temper ature characteristi cs, on the actual device.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 19 „ Explanation of Terms 1. Low dropout voltage regulator This IC’s voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor. 2. Output voltage (VOUT) The accuracy of the output voltage is ensured at ±1.0% under the specified condi tions 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. See “„ Electrical Characteristics” and “ „ Characteristics (Typical Data) (Per Circuit)” for details. 3. Line regulation Indicates the dependency of the output voltage on the input volt age. That is, the values show how much the output voltage changes due to a change in the input voltage with the output current remaining unchanged. 4. Load regulation (ΔVOUT2) Indicates the dependency of the output voltage on the output current. That is, the values show how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 5. Dropout voltage (Vdrop) Indicates the differenc e between input voltage V IN and the output voltage when; decreasing input voltage V IN gradually until the output voltage 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) ΔVOUT1 ΔVIN •VOUT

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 20 6. Temperature coefficient of output voltage The shaded area in Figure 22 is the range where V OUT varies in the operating temperature range when the temperature coefficient of the output voltage is ±120 ppm/°C. VOUT(E) Example of VOUT = 3.0 V Typ. products −40 25 +0.36 mV/°C VOUT [V] *1. V OUT(E) is the value of the output voltage measured at 25°C.

85 Ta [°C]

−0.36 mV/°C Figure 22 A change in the temperature of the output voltage [mV/°C] is calculated using the following equation. [] [ ] [] 1000 C ppm/VΔTa ΔVV V C mV/ΔTa ΔV OUT OUT OUT(S) OUT *1. Change in temperature of output voltage *2. Specified output voltage *3. Output voltage temperature coefficient ΔVOUT ΔTa •VOUT

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 22 3. ON/OFF pin 1 and 2 These pins start and stop the regulator. When the ON/OFF pin is set to the power-off level, the ent ire internal circuit stops operating, and the built-in P- channel MOS FET output transistor betw een the VIN and VOUT pin is turned o ff, in order to reduce the current consumption significantly. The VOUT pin is set to the V SS level by the internal dividing resistor of several hundred kΩ which is placed between the VOUT and VSS pin. Note that the current consumption increases when a voltage of 0.3 V to 1.2 V (@Ta = 25°C) is applied to the ON/OFF pin. The ON/OFF pin is configured as shown in Figures 24 and 25. In the S-1721 Series A, B C, and D types, the ON/OFF pin is internally pulled up to VIN or pulled down to VSS when in the floating status , so the VOUT pin is set to the VSS level. In the S-1721 Series E, F, G and H types, do not use S-1721 Series in the floating status because the ON/OFF pin is not internally pulled up or pulled down. When not using the ON/OFF pin in the S-1721 Series E, F, G, and H types, c onnect the ON/OFF pin to the VIN pin in the E, F (1ch only), and G (2ch only) types. In the F (2ch only), G (1ch only) and H types, connect the ON/OFF pin to the VSS pin. Table 11 Logic Type ON/OFF Pin Internal Circuits VOUT Pin Voltage Current Consumption A 1ch “H”: Power on 2ch “H”: Power on Operate Operate Set value Set value I SS1 ISS1 B 1ch “H”: Power on 2ch “L”: Power on Operate Operate Set value Set value I SS1 ISS1 C 1ch “L”: Power on 2ch “H”: Power on Operate Operate Set value Set value I SS1 ISS1 D 1ch “L”: Power on 2ch “L”: Power on Operate Operate Set value Set value I SS1 ISS1 E 1ch “L”: Power off 2ch “L”: Power off Stop Stop V SS level VSS level ISS2 ISS2 F 1ch “L”: Power off 2ch “H”: Power off Stop Stop V SS level VSS level ISS2 ISS2 G 1ch “H”: Power off 2ch “L”: Power off Stop Stop V SS level VSS level ISS2 ISS2 H 1ch “H”: Power off 2ch “H”: Power off Stop Stop V SS level VSS level ISS2 ISS2 (1) S-1721 Series A, B, C, D Types (2) S-1721 Series E, F, G, H Types VSS VIN ON/OFF B (2ch), C (1ch), D types A, B (1ch), C (2ch) type VSS VIN ON/OFF Figure 24 Figure 25

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 23 4. Overcurrent protector The S-1721 Series has a built-in overcurr ent protector having the characterist ics shown in (1) Output Voltage vs. Output Current (Ta = 25° C) in “„ Characteristics (Typical Data) (Per Circuit) ” to protect the output transistor against an excessive output current and short circuiting between the VOUT and VSS pin. The current (I short) when the output pin is short-circuited is internally set at approximately 150 mA (Typ.), and the initial value is restored for the output voltage, if releasing a short circuit once. Caution Note that the overcurrent protect circuit does not provide a thermal protection function, therefore pay attention to the conditions of input voltage and load current so that the IC’s loss under the usage conditions, including the short circui t conditions, does not exceed the package power dissipation if the condition in which a short circ uiting or large current state (150 mA or more) continues for a long time. 5. Pull-down/pull-up resistor (S-1721 Series A, B, C, and D types) In the S-1721 Series A, B, C, and D ty pes, the ON/OFF pin is internally pulled up to VIN or pulled down to VSS, so the VOUT pin is in the VSS level when in the floating status. In A/B (1ch only) and C (2ch only), the ON/OFF pin is connected to VIN, In B (2ch only)/C (1ch only)/D type, the ON/OFF pin is connected to VSS; Note that during operation in these cases, the current cons umption of the IC is generat ed as much as the current which flows into a pull-up resistor of 2.6 MΩ or a pull-down resistor of 2.6 MΩ.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 24 „ Precautions

• Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low. When mounting an output capacitor between the VOUT and VSS pin (C L1, CL2) and a capacitor for stabiliz ing the input between VIN and VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
• Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or less).
• Note that the output vo ltage may increase due to the leak age current from a driver when a series regulator is used at high temperature.
• Generally a series regulator may c ause oscillation, depending on the selecti on of external parts. The following conditions are recommended for this IC. However, be sure to perform sufficient eval uation under the actual usage conditions for selection, including evaluation of temperature characteristics. See “(5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25° C)” in “„ Reference Data (Per Circuit) ” for the equivalent series resistance (RESR) of the output capacitor. Input capacitor (C IN) : 1.0 μF or more Output capacitor (C L1, CL2) : 1.0 μF or more
• The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small or an input capacitor is not connected. Note that, if the capacitance of the output capacitor is greater than that of the input capacitor, the voltage regulator may oscillate.
• Note that an oscillation may occur when the load current is high (100 mA or higher) and the difference between the voltage input and output is ar ound the dropout voltage if the inductance of the power supply is high. Perform sufficient evaluation including electrical characteristics under the actual use conditions to select an input capacitor.
• Concerning the fluctuation of output voltage due to power-supplying and load, confirm with the actual device.
• If the power supply suddenly increases, a momentary overshoot may be output. It is ther efore important to sufficiently evaluate the output voltage at power application in the actual equipment.
• The application conditions for the i nput voltage, output volt age, and load current shoul d not exceed the package 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 out put current value specified in Table 10 in “„ Electrical Characteristics” and footnote *5 of the table.
• SII claims no responsibility for any disputes arising out of or in connecti on with any infringement by products including this IC of patents owned by a third party.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 25 „ Characteristics (Typical Data) (Per Circuit) (1) Output Voltage vs. Output Current (When Load Current Increases) (Ta = 25°C) VOUT = 1.2 V VOUT = 3.0 V 0 100 200 400 VOUT [V] 1.2 0.8 0.4 IOUT [mA] 1.6 300 1.4 1.0 0.6 0.2 VIN = 1.5 V 1.7 V 2.2 V 3.2 V 6.5 V VOUT [V] 3.5 3.0 2.5 2.0 1.5 1.0 0.5 IOUT [mA] 0 100 200 400300 VIN = 3.3 V 3.5 V 4.0 V 5.0 V 6.5 V VOUT = 5.0 V 0 100 200 400 VOUT [V] IOUT [mA] 300 VIN = 5.3 V 5.5 V 6.0 V 6.5 V Remark In determining the output current, attention should be paid to the following. 1. The minimum output current value and footnote *5 in Table 10 in the “„ Electrical Characteristics” 2. The package power dissipation (2) Output Voltage vs. Input Voltage (Ta = 25°C) VOUT = 1.2 V VOUT = 3.0 V VOUT [V] 1.30 1.20 1.15 1.05 1.00 VIN [V] 3.5 IOUT = 1 mA IOUT = 50 mA IOUT = 30 mA1.10 1.25 VOUT [V] 3.1 3.0 2.9 2.8 2.7 2.6 2.5 VIN [V] 5.0 IOUT = 1 mA IOUT = 50 mA IOUT = 30 mA VOUT = 5.0 V 4.5 5.0 5.5 6.0 VOUT [V] 5.2 5.1 5.0 4.8 4.7 4.6 4.5 VIN [V] 6.5 4.9 IOUT = 1 mA IOUT = 50 mA IOUT = 30 mA

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 26 (3) Dropout Voltage vs. Output Current VOUT = 1.2 V VOUT = 3.0 V 0 100 200 Vdrop [V] 0.45 0.35 0.30 0.25 0.20 0.15 0.10 0.05 IOUT [mA] 15050 85°C 25°C −40°C 0.40 0 100 200 Vdrop [V] 0.30 0.20 0.15 0.10 0.05 IOUT [mA] 15050 85°C 25°C −40°C 0.25 VOUT = 5.0 V 0 100 200 Vdrop [V] 0.25 0.20 0.15 0.10 0.05 IOUT [mA] 15050 85°C 25°C −40°C (4) Dropout Voltage vs. Set Output Voltage 0 23 Vdrop [V] 0.40 0.35 0.25 0.20 0.15 0.10 0.05 VOTA [V] 1 456 150 mA 100 mA 50 mA 30 mA 10 mA 0.30

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 27 (5) Output Voltage vs. Ambient Temperature VOUT = 1.2 V VOUT = 3.0 V −40 0 25 50 75 VOUT [V] 1.30 1.20 1.15 1.10 Ta [°C] 1.25 −25 85 −40 0 25 50 75 VOUT [V] 3.20 3.00 2.90 2.80 Ta [°C] 3.10 −25 85 3.05 2.95 2.85 3.15 VOUT = 5.0 V −40 0 25 50 75 VOUT [V] 5.3 5.0 4.9 4.7 Ta [°C] 5.2 −25 85 5.1 4.8 (6) Current Consumption vs. Input Voltage VOUT = 1.2 V VOUT = 3.0 V 02 5 6 7 ISS1 [μA] VIN [V] 1 34 85°C 25°C −40°C 02 5 6 7 ISS1 [μA] VIN [V] 1 34 85°C 25°C −40°C VOUT = 5.0 V 02 5 6 7 ISS1 [μA] VIN [V] 1 34 85°C 25°C −40°C

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 28 (7) Ripple Rejection (Ta = 25°C) VOUT = 1.2 V VIN = 2.2 V, CLn = 1.0 μF VOUT = 3.0 V VIN = 4.0 V, CLn = 1.0 μF /K31/K30 /K31/K30/K30 /K31/K6B /K31/K30/K6B /K31/K30/K30/K6B /K52/K69/K70/K70/K6C/K65 /K52/K65/K6A/K65/K63/K74/K69/K6F/K6E /K5B/K64/K42/K5D/K30 /K32/K30 /K34/K30 /K36/K30 /K38/K30 /K46/K72/K65/K71/K75/K65/K6E/K63/K79 /K5B/K48/K7A/K5D /K31/K4D /K31/K32/K30 /K49 /K4F/K55/K54 /K3D /K31/K30/K30 /K6D/K41 /K49 /K4F/K55/K54 /K3D/K33 /K30/K6D /K41 /K49 /K4F/K55/K54 /K3D/K31/K6D /K41 /K31/K30/K30 /K31/K30 /K31/K30/K30 /K31/K6B /K31/K30/K6B /K31/K30/K30/K6B /K52/K69/K70/K70/K6C/K65 /K52/K65/K6A/K65/K63/K74/K69/K6F/K6E /K5B/K64/K42/K5D/K30 /K32/K30 /K34/K30 /K36/K30 /K38/K30 /K46/K72/K65/K71/K75/K65/K6E/K63/K79 /K5B/K48/K7A/K5D /K31/K4D /K31/K32/K30 /K31/K30/K30 /K49 /K4F/K55/K54 /K3D /K31/K30/K30 /K6D/K41 /K49 /K4F/K55/K54 /K3D/K33 /K30/K6D /K41 /K49 /K4F/K55/K54 /K3D/K31/K6D /K41 VOUT = 5.0 V VIN = 6.0 V, CLn = 1.0 μF /K31/K30 /K31/K30/K30 /K31/K6B /K31/K30/K6B /K31/K30/K30/K6B /K52/K69/K70/K70/K6C/K65 /K52/K65/K6A/K65/K63/K74/K69/K6F/K6E /K5B/K64/K42/K5D/K30 /K32/K30 /K34/K30 /K36/K30 /K38/K30 /K46/K72/K65/K71/K75/K65/K6E/K63/K79 /K5B/K48/K7A/K5D /K31/K4D /K31/K32/K30 /K31/K30/K30 /K49 /K4F/K55/K54 /K3D /K31/K30/K30 /K6D/K41 /K49 /K4F/K55/K54 /K3D/K33 /K30/K6D /K41 /K49 /K4F/K55/K54 /K3D/K31/K6D /K41 Remark CLn: Capacitor set to VOUTn pin externally (n = 1, 2)

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 29 „ Reference Data (Per Circuit) (1) Transient Response Characteristics when Input (Ta = 25°C) Common to VR1 and VR2 VOUT = 1.2 V IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF VOUT = 3.0 V IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF VOUT [V] 1.30 1.28 1.26 1.24 1.22 1.20 1.18 1.16 1.14 t [μs] VIN [V] 4.0 3.0 2.5 2.0 0.5 1.0 1.5 3.5 −50 200 3000 50 100 150 250 350−100 VOUT VIN VOUT [V] 3.10 3.08 3.06 3.04 3.02 3.00 2.98 2.96 t [μs] VIN [V] 7.0 5.0 4.0 1.0 2.0 3.0 6.0 −50 200 3000 50 100 150 250 350−100 VOUT VIN VOUT = 5.0 V IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF VOUT [V] 5.04 5.03 5.02 5.01 5.00 4.99 4.98 4.97 t [μs] VIN [V] 7.0 6.0 5.5 3.5 4.0 4.5 5.0 6.5 −50 200 3000 50 100 150 250 350−100 VOUT VIN (2) Transient Response Characteristics of Load (Ta = 25°C) VOUT = 1.2 V VIN = 2.2 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA VOUT = 1.2 V VIN = 2.2 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA VOUT [V] 1.46 1.42 1.34 1.30 1.26 1.22 1.14 1.10 t [μs] IOUT [mA] 100 −150 −125 −50 −25 −50 200 3000 50 100 150 250 350−100 −1001.18 1.38 VOUT IOUT VOUT [V] 1.42 1.38 1.30 1.26 1.22 1.18 1.10 1.06 t [μs] IOUT [mA] 200 −250 −200 −100 −50 150 −50 200 3000 50 100 150 250 350−100 VOUT IOUT 100 −1501.14 1.34 VOUT = 3.0 V VIN = 4.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA VOUT = 3.0 V VIN = 4.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA VOUT [V] 3.25 3.20 3.10 3.05 3.00 2.95 2.85 2.80 t [μs] IOUT [mA] 100 −125 −100 −50 −25 −50 200 3000 50 100 150 250 350−100 −752.90 3.15 VOUT IOUT VOUT [V] 3.25 3.20 3.10 3.05 3.00 2.95 2.85 2.80 t [μs] IOUT [mA] 200 −250 −200 −100 −50 150 −50 200 3000 50 100 150 250 350−100 100 −1502.90 3.15 VOUT IOUT Remark CLn: Capacitor set to VOUTn pin externally (n = 1, 2)

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 30 VOUT = 5.0 V VIN = 6.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA VOUT = 5.0 V VIN = 6.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA VOUT [V] 5.50 5.40 5.20 5.10 5.00 4.90 4.70 4.60 t [μs] IOUT [mA] 100 −125 −100 −50 −25 −50 200 3000 50 100 150 250 350−100 −754.80 5.30 VOUT IOUT VOUT [V] 5.50 5.40 5.20 5.10 5.00 4.90 4.70 4.60 t [μs] IOUT [mA] 200 −250 −200 −100 −50 150 −50 200 3000 50 100 150 250 350−100 100 −1504.80 5.30 VOUT IOUT (3) Transient Response Characteristics of ON/OFF Pin (Ta = 25°C) VOUT = 1.2 V VIN = 2.2 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA VOUT = 3.0 V VIN = 4.0 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA VOUT [V]1.2 0.8 0.4 t [μs] VON / OFF [V] 4.0 2.0 0 50 100 150 200 VOUT VON / OFF 1.6 2.0 2.4 −2.0 −4.0 −6.0 −8.0 VOUT [V] 3.0 2.0 1.0 t [μs] VON / OFF [V] 6.0 4.0 0 50 100 150 200 VOUT VON / OFF 2.0 4.0 5.0 6.0 7.0 −2.0 −4.0 −6.0 −8.0 VOUT = 5.0 V VIN = 6.0 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA VOUT [V] 3.0 2.0 1.0 t [μs] VON / OFF [V] 8.0 4.0 0 50 100 150 200 2.0 4.0 5.0 VOUT VON / OFF 6.0 6.0 7.0 8.0 9.0 10.0 −2.0 −4.0 −6.0 −8.0 −10.0 −12.0 Remark CLn: Capacitor set to VOUTn pin externally (n = 1, 2)

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 31 (4) Transient Response Characteristics of Load’s Mutual Interference (Ta = 25°C) VOUT1 = VOUT2 = 1.2 V VIN = 2.2 V, CL1 = CL2 = 1.0 μF, CIN = 1.0 μF, IOUT1 = 10 ↔ 100 mA, IOUT2 = no load VOUT1 = VOUT2 = 3.0 V VIN = 4.0 V, CL1 = CL2 = 1.0 μF, CIN = 1.0 μF, IOUT1 = 10 ↔ 100 mA, IOUT2 = no load VOUT1 [V] 1.26 1.22 1.18 1.10 1.06 t [μs] −50 200 3000 50 100 150 250 350−100

1.14 VOUT1

VOUT2 [V] 1.30 1.26 1.22 1.18 1.14 VOUT2 IOUT1 [mA] 150 −50 100 50IOUT1 VOUT1 [V] 3.05 3.00 2.95 2.85 2.80 t [μs] −50 200 3000 50 100 150 250 350−100

2.90 VOUT2 [V]

3.10 3.05 3.00 2.95 2.90 VOUT2 IOUT1 [mA] 150 −50 100 50IOUT1 VOUT1 VOUT1 = VOUT2 = 5.0 V VIN = 6.0 V, CL1 = CL2 = 1.0 μF, CIN = 1.0 μF, IOUT1 = 10 ↔ 100 mA, IOUT2 = no load VOUT1 [V] 5.10 5.00 4.90 4.70 4.60 t [μs] −50 200 3000 50 100 150 250 350−100

4.80 VOUT2 [V]

5.20 5.10 5.00 4.90 4.80 VOUT2 IOUT1 [mA] 150 −50 100 50IOUT1 VOUT1 (5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25°C) 100 0 150 IOUT [mA] RESR [Ω] CIN = CLn = 1.0 μF 0.01 Stable Remark CLn: Capacitor set to VOUTn pin externally (n = 1, 2)

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 32 „ Marking Specifications (1) SNT-6A (1) to (3) : Product code (Refer to Product name vs. Product code ) (4) to (6) : Lot number SNT-6A Top view 3 4 (1) (4) (2) (5) (3) (6) Product name vs. Product code (a) S-1721 Series A type Product code Product code Product Name (1) (2) (3) Product Name (1) (2) (3) S-1721A1212-I6T1x S 2 B S-1721A2515-I6T1x S 6 P S-1721A1215-I6T1x S 2 D S-1721A2518-I6T1x S 2 Z S-1721A1218-I6T1x S 2 S S-1721A2525-I6T1x S 6 Q S-1721A1225-I6T1x S 6 D S-1721A2528-I6T1x S 6 R S-1721A1226-I6T1x S 6 7 S-1721A252J-I6T1x S 6 S S-1721A1228-I6T1x S 6 E S-1721A2530-I6T1x S 6 T S-1721A122J-I6T1x S 6 F S-1721A2533-I6T1x S 6 U S-1721A1230-I6T1x S 6 G S-1721A2613-I6T1x S 6 A S-1721A1233-I6T1x S 2 N S-1721A2812-I6T1x S 6 B S-1721A1C18-I6T1x S 2 W S-1721A2815-I6T1x S 2 H S-1721A1512-I6T1x S 6 H S-1721A2818-I6T1x S 2 I S-1721A1513-I6T1x S 2 P S-1721A2825-I6T1x S 6 V S-1721A1515-I6T1x S 2 Q S-1721A2826-I6T1x S 2 8 S-1721A1518-I6T1x S 6 I S-1721A2828-I6T1x S 2 A S-1721A1525-I6T1x S 6 J S-1721A282J-I6T1x S 6 W S-1721A152J-I6T1x S 6 K S-1721A2830-I6T1x S 6 X S-1721A1530-I6T1x S 6 L S-1721A2833-I6T1x S 6 C S-1721A1533-I6T1x S 6 M S-1721A2J12-I6T1x S 6 9 S-1721A1812-I6T1x S 2 T S-1721A2J15-I6T1x S 7 A S-1721A1815-I6T1x S 6 N S-1721A2J18-I6T1x S 2 V S-1721A1818-I6T1x S 2 X S-1721A2J2J-I6T1x S 2 J S-1721A1825-I6T1x S 2 F S-1721A2J33-I6T1x S 6 8 S-1721A1826-I6T1x S 2 7 S-1721A3018-I6T1x S 2 6 S-1721A1828-I6T1x S 2 G S-1721A3028-I6T1x S 6 Y S-1721A1829-I6T1x S 6 4 S-1721A3030-I6T1x S 2 K S-1721A182J-I6T1x S 2 U S-1721A3033-I6T1x S 6 Z S-1721A1830-I6T1x S 2 3 S-1721A3119-I6T1x S 2 L S-1721A1833-I6T1x S 2 2 S-1721A3318-I6T1x S 2 M S-1721A2020-I6T1x S 2 C S-1721A3330-I6T1x S 6 2 S-1721A2121-I6T1x S 2 R S-1721A3333-I6T1x S 2 O S-1721A2512-I6T1x S 6 O Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.0_00 S-1721 Series Seiko Instruments Inc. 33 (b) S-1721 Series B type (e) S-1721 Series E type Product code Product code Product Name (1) (2) (3) Product Name (1) (2) (3) S-1721B1515-I6T1x S 3 A S-1721E1328-I6T1x S 5 A S-1721B1518-I6T1x S 3 B S-1721E1528-I6T1x S 5 B S-1721B1812-I6T1x S 3 C S-1721E1828-I6T1x S 5 D S-1721B1818-I6T1x S 3 D S-1721E1833-I6T1x S 5 L S-1721B2818-I6T1x S 3 E S-1721E2518-I6T1x S 5 E S-1721B2J2J-I6T1x S 3 F S-1721E2525-I6T1x S 5 F S-1721E2530-I6T1x S 5 O (c) S-1721 Series C type S-1721E2818-I6T1x S 5 G Product code S-1721E2833-I6T1x S 5 H Product Name (1) (2) (3) S-1721E2J25-I6T1x S 5 K S-1721C2J2J-I6T1x S 4 A S-1721E2J2J-I6T1x S 5 I S-1721E3012-I6T1x S 5 S (d) S-1721 Series D type S-1721E3025-I6T1x S 5 P Product code S-1721E3033-I6T1x S 5 J Product Name (1) (2) (3) S-1721D1818-I6T1x S 4 T S-1721D3318-I6T1x S 4 S Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1721 Series Rev.2.0_00 Seiko Instruments Inc. 34 (2) SOT-23-6 (1) to (3) : Product code (Refer to Product name vs. Product code ) (4) : Lot number 6 4 1 3 2 (1) (2) (3) (4) SOT-23-6 Top view Product name vs. Product code (a) S-1721 Series A type Product code Product code Product Name (1) (2) (3) Product Name (1) (2) (3) S-1721A1212-M6T1x S 2 B S-1721A2518-M6T1x S 2 Z S-1721A1215-M6T1x S 2 D S-1721A2528-M6T1x S 6 R S-1721A1228-M6T1x S 6 E S-1721A2812-M6T1x S 6 B S-1721A1233-M6T1x S 2 N S-1721A2815-M6T1x S 2 H S-1721A1328-M6T1x S 2 4 S-1721A2818-M6T1x S 2 I S-1721A1330-M6T1x S 2 E S-1721A2828-M6T1x S 2 A S-1721A1528-M6T1x S 2 Y S-1721A2830-M6T1x S 6 X S-1721A1530-M6T1x S 6 L S-1721A2833-M6T1x S 6 C S-1721A1533-M6T1x S 6 M S-1721A2J2J-M6T1x S 2 J S-1721A1825-M6T1x S 2 F S-1721A3312-M6T1x S 2 9 S-1721A1828-M6T1x S 2 G S-1721A3318-M6T1x S 2 M S-1721A1830-M6T1x S 2 3 S-1721A3328-M6T1x S 6 3 S-1721A1833-M6T1x S 2 2 S-1721A3333-M6T1x S 2 O S-1721A2020-M6T1x S 2 C (b) S-1721 Series B type (e) S-1721 Series E type Product code Product code Product Name (1) (2) (3) Product Name (1) (2) (3) S-1721B2828-M6T1x S 3 G S-1721E1528-M6T1x S 5 B S-1721E1825-M6T1x S 5 U (c) S-1721 Series C type S-1721E1826-M6T1x S 5 C Product code S-1721E1828-M6T1x S 5 D Product Name (1) (2) (3) S-1721E1830-M6T1x S 5 Q S-1721C2J2J-M6T1x S 4 A S-1721E1833-M6T1x S 5 L S-1721E2025-M6T1x S 5 T (d) S-1721 Series D type S-1721E2813-M6T1x S 5 M Product code S-1721E2818-M6T1x S 5 G Product Name (1) (2) (3) S-1721E2833-M6T1x S 5 H S-1721D1828-M6T1x S 4 R S-1721E2J25-M6T1x S 5 K S-1721D3318-M6T1x S 4 S S-1721E3312-M6T1x S 5 N Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

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