S-1721 Series
www.ablicinc.com
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION
LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
© ABLIC Inc., 2007-2015 Rev.2.1_02
1
The S-1721 Series, developed using the CMOS technology, is a 2-channel positive voltage regulator 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 small ceramic capacitor of 1.0 F 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 the 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
Input voltage: 1.7 V to 6.5 V
Output voltage accuracy: 1.0%
Dropout voltage: 130 mV typ. (3.0 V output product, IOUT = 100 mA)
Current consumption: During operation: 25 A typ., 45 A max. (3.0 V output product, per circuit)
During power-off: 0.1 A typ., 1.0 A max.
Output current: Possible to output 150 mA (VIN VOUT
(
S
)
1.0 V)*1 (per circuit)
Input and output capacitors: A ceramic capacitor of 1.0 F or more can be used.
Ripple rejection: 80 dB typ. (products having the output under 1.8 V, f = 1.0 kHz)
Built-in overcurrent protection circuit: Iimits overcurrent of output transistor.
Built-in ON/OFF circuit: Ensures long battery life.
Pull-up or pull-down resistor is selectable.
Operation temperature range: Ta = 40°C to 85°C
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
Constant-voltage power supply for cellular phone
Constant-voltage power supply for battery-powered device
Packages
SNT-6A
SOT-23-6
www.ablic.com
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
2
Block Diagrams
1. S-1721 Series A type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “H”
2ch Active “H”
Pull-up resistor 1ch
None
2ch None
Pull-down resistor 1ch Available
2ch Available
Figure 1
2. S-1721 Series B type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “H”
2ch Active “L”
Pull-up resistor 1ch
None
2ch Available
Pull-down resistor 1ch Available
2ch None
Figure 2
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
3
3. S-1721 Series C type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “L”
2ch Active “H”
Pull-up resistor 1ch
Available
2ch None
Pull-down resistor 1ch None
2ch Available
Figure 3
4. S-1721 Series D type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “L”
2ch Active “L”
Pull-up resistor 1ch
Available
2ch Available
Pull-down resistor 1ch None
2ch None
Figure 4
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
4
5. S-1721 Series E type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “H”
2ch Active “H”
Pull-up resistor 1ch
None
2ch None
Pull-down resistor 1ch None
2ch None
Figure 5
6. S-1721 Series F type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “H”
2ch Active “L”
Pull-up resistor 1ch
None
2ch None
Pull-down resistor 1ch None
2ch None
Figure 6
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
5
7. S-1721 Series G type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “L”
2ch Active “H”
Pull-up resistor 1ch
None
2ch None
Pull-down resistor 1ch None
2ch None
Figure 7
8. S-1721 Series H type
*1. Parasitic diode
ON/OFF1
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
VIN
ON/OFF2
VOUT1
VSS
VOUT2
Overcurrent
protection
circuit
ON/OFF
circuit
Reference
voltage circuit
*1
*
1
Function Status
ON/OFF logic 1ch Active “L”
2ch Active “L”
Pull-up resistor 1ch
None
2ch None
Pull-down resistor 1ch None
2ch None
Figure 8
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
6
Product Name Structure
Users can select the product type, output voltage, and package type for 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 U
Environmental code
U : Lead-free (Sn 100%), halogen-free
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
*2
A to H
*1. Refer to the tape drawing.
*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*2
A to H
*1. Refer to the tape drawing.
*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.2.1_02 S-1721 Series
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
Package Name Drawing Code
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.2.1_02
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-I6T1U S-1721A1212-M6T1x
1.2 V 15 mV 1.5 V 1.0% S-1721A1215-I6T1U S-1721A1215-M6T1x
1.2 V 15 mV 1.8 V 1.0% S-1721A1218-I6T1U
1.2 V 15mV 2.5 V 1.0% S-1721A1225-I6T1U
1.2 V 15 mV 2.6 V 1.0% S-1721A1226-I6T1U
1.2 V 15 mV 2.8 V 1.0% S-1721A1228-I6T1U S-1721A1228-M6T1x
1.2 V 15 mV 2.85 V 1.0% S-1721A122J-I6T1U
1.2 V 15 mV 3.0 V 1.0% S-1721A1230-I6T1U
1.2 V 15 mV 3.3 V 1.0% S-1721A1233-I6T1U S-1721A1233-M6T1x
1.25 V 15 mV 1.8 V 1.0% S-1721A1C18-I6T1U
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-I6T1U
1.5 V 1.0% 1.3 V 15 mV S-1721A1513-I6T1U
1.5 V 1.0% 1.5 V 1.0% S-1721A1515-I6T1U
1.5 V 1.0% 1.8 V 1.0% S-1721A1518-I6T1U
1.5 V 1.0% 2.5 V 1.0% S-1721A1525-I6T1U
1.5 V 1.0% 2.8 V 1.0%
S-1721A1528-M6T1x
1.5 V 1.0% 2.85 V 1.0% S-1721A152J-I6T1U
1.5 V 1.0% 3.0 V 1.0% S-1721A1530-I6T1U S-1721A1530-M6T1x
1.5 V 1.0% 3.3 V 1.0% S-1721A1533-I6T1U S-1721A1533-M6T1x
1.8 V 1.0% 1.2 V 15 mV S-1721A1812-I6T1U
1.8 V 1.0% 1.5 V 1.0% S-1721A1815-I6T1U
1.8 V 1.0% 1.8 V 1.0% S-1721A1818-I6T1U
1.8 V 1.0% 2.5 V 1.0% S-1721A1825-I6T1U S-1721A1825-M6T1x
1.8 V 1.0% 2.6 V 1.0% S-1721A1826-I6T1U
1.8 V 1.0% 2.8 V 1.0% S-1721A1828-I6T1U S-1721A1828-M6T1x
1.8 V 1.0% 2.9 V 1.0% S-1721A1829-I6T1U
1.8 V 1.0% 2.85 V 1.0% S-1721A182J-I6T1U
1.8 V 1.0% 3.0 V 1.0% S-1721A1830-I6T1U S-1721A1830-M6T1x
1.8 V 1.0% 3.3 V 1.0% S-1721A1833-I6T1U S-1721A1833-M6T1x
2.0 V 1.0% 2.0 V 1.0% S-1721A2020-I6T1U S-1721A2020-M6T1x
2.1 V 1.0% 2.1 V 1.0% S-1721A2121-I6T1U
2.5 V 1.0% 1.2 V 15 mV S-1721A2512-I6T1U
2.5 V 1.0% 1.5 V 1.0% S-1721A2515-I6T1U
2.5 V 1.0% 1.8 V 1.0% S-1721A2518-I6T1U S-1721A2518-M6T1x
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
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% 2.5 V 1.0% S-1721A2525-I6T1U
2.5 V 1.0% 2.8 V 1.0% S-1721A2528-I6T1U
S-1721A2528-M6T1x
2.5 V 1.0% 2.85 V 1.0% S-1721A252J-I6T1U
2.5 V 1.0% 3.0 V 1.0% S-1721A2530-I6T1U
2.5 V 1.0% 3.3 V 1.0% S-1721A2533-I6T1U
2.6 V 1.0% 1.3 V 15 mV S-1721A2613-I6T1U
2.8 V 1.0% 1.2 V 15 mV S-1721A2812-I6T1U S-1721A2812-M6T1x
2.8 V 1.0% 1.5 V 1.0% S-1721A2815-I6T1U S-1721A2815-M6T1x
2.8 V 1.0% 1.8 V 1.0% S-1721A2818-I6T1U S-1721A2818-M6T1x
2.8 V 1.0% 2.5 V 1.0% S-1721A2825-I6T1U
2.8 V 1.0% 2.6 V 1.0% S-1721A2826-I6T1U
2.8 V 1.0% 2.8 V 1.0% S-1721A2828-I6T1U S-1721A2828-M6T1x
2.8 V 1.0% 2.85 V 1.0% S-1721A282J-I6T1U
2.8 V 1.0% 3.0 V 1.0% S-1721A2830-I6T1U
S-1721A2830-M6T1x
2.8 V 1.0% 3.3 V 1.0% S-1721A2833-I6T1U S-1721A2833-M6T1x
2.85 V 1.0% 1.2 V 15 mV S-1721A2J12-I6T1U
2.85 V 1.0% 1.5 V 1.0% S-1721A2J15-I6T1U
2.85 V 1.0% 1.8 V 1.0% S-1721A2J18-I6T1U
2.85 V 1.0% 2.85 V 1.0% S-1721A2J2J-I6T1U S-1721A2J2J-M6T1x
2.85 V 1.0% 3.3 V 1.0% S-1721A2J33-I6T1U
3.0 V 1.0% 1.8 V 1.0% S-1721A3018-I6T1U
3.0 V 1.0% 2.8 V 1.0% S-1721A3028-I6T1U
3.0 V 1.0% 3.0 V 1.0% S-1721A3030-I6T1U
3.0 V 1.0% 3.3 V 1.0% S-1721A3033-I6T1U
3.1 V 1.0% 1.9 V 1.0% S-1721A3119-I6T1U
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-I6T1U S-1721A3318-M6T1x
3.3 V 1.0% 2.8 V 1.0%
S-1721A3328-M6T1x
3.3 V 1.0% 3.0 V 1.0% S-1721A3330-I6T1U
3.3 V 1.0% 3.3 V 1.0% S-1721A3333-I6T1U 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.2.1_02
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
1.5 V 1.0% 1.5 V 1.0% S-1721B1515-I6T1U
1.5 V 1.0% 1.8 V 1.0% S-1721B1518-I6T1U
1.8 V 1.0% 1.2 V 15 mV S-1721B1812-I6T1U
1.8 V 1.0% 1.8 V 1.0% S-1721B1818-I6T1U
2.8 V 1.0% 1.8 V 1.0% S-1721B2818-I6T1U
2.8 V 1.0% 2.8 V 1.0% S-1721B2828-M6T1x
2.85 V 1.0% 2.85 V 1.0% S-1721B2J2J-I6T1U
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-I6T1U 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
1.8 V 1.0% 1.8 V 1.0% S-1721D1818-I6T1U
1.8 V 1.0% 2.8 V 1.0% S-1721D1828-M6T1x
3.3 V 1.0% 1.8 V 1.0% S-1721D3318-I6T1U 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.2.1_02 S-1721 Series
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-I6T1U
1.5 V 1.0% 2.8 V 1.0% S-1721E1528-I6T1U S-1721E1528-M6T1x
1.8 V 1.0% 2.5 V 1.0% S-1721E1825-M6T1x
1.8 V 1.0% 2.6 V 1.0% S-1721E1826-M6T1x
1.8 V 1.0% 2.8 V 1.0% S-1721E1828-I6T1U S-1721E1828-M6T1x
1.8 V 1.0% 3.0 V 1.0% S-1721E1830-M6T1x
1.8 V 1.0% 3.3 V 1.0% S-1721E1833-I6T1U S-1721E1833-M6T1x
2.0 V 1.0% 2.5 V 1.0% S-1721E2025-M6T1x
2.5 V 1.0% 1.8 V 1.0% S-1721E2518-I6T1U
2.5 V 1.0% 2.5 V 1.0% S-1721E2525-I6T1U
2.5 V 1.0% 3.0 V 1.0% S-1721E2530-I6T1U
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-I6T1U S-1721E2818-M6T1x
2.8 V 1.0% 3.3 V 1.0% S-1721E2833-I6T1U S-1721E2833-M6T1x
2.85 V 1.0% 2.5 V 1.0% S-1721E2J25-I6T1U S-1721E2J25-M6T1x
2.85 V 1.0% 2.85 V 1.0% S-1721E2J2J-I6T1U
3.0 V 1.0% 1.2 V 15 mV S-1721E3012-I6T1U
3.0 V 1.0% 2.5 V 1.0% S-1721E3025-I6T1U
3.0 V 1.0% 3.3 V 1.0% S-1721E3033-I6T1U
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.2.1_02
12
Pin Configurations
1. SNT-6A
5
4
6
2
3
1
Top view
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
Figure 9
2. SOT-23-6
132
546
Top view
Table 8
Pin No. Symbol Description
1 ON/OFF1 ON/OFF pin 1
2 VIN Input voltage pin
3 ON/OFF2 ON/OFF pin 2
4 VOUT2 Output voltage pin 2
5 VSS GND pin
6 VOUT1 Output voltage pin 1
Figure 10
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
13
Absolute Maximum Ratings
Table 9
(Ta 25C unless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
Input voltage VIN V
SS 0.3 to VSS 7.0 V
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
Power dissipation SNT-6A PD 400*1 mW
SOT-23-6 650*1 mW
Operating ambient temperature To
40 to 85 °C
Storage temperature Tst
g
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 which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
0
50
100
150
400
200
0
700
300
100
SNT-6A
SOT-23-6
500
600
Power Dissipation (P
D
) [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.2.1_02
14
Electrical Characteristics
Table 10
Voltage regulator 1 and voltage regulator 2 (per circuit) (Ta = 25C unless otherwise specified)
Item Symbol Conditions Min. Typ. Max. Unit
Test
Circuit
Output voltage
*1
V
OUT(E)
V
IN
= V
OUT(S)
1.0 V,
I
OUT
= 30 mA
1.2 V
V
OUT(S)
< 1.5 V V
OUT(S)
0.015 V
OUT(S)
V
OUT(S)
+ 0.015 V 2, 3
1.5 V
V
OUT(S)
5.0 V V
OUT(S)
0.99 V
OUT(S)
V
OUT(S)
1.01 V 2, 3
Output current
*2
I
OUT
V
IN
V
OUT
(
S
)
1.0 V 150
*5
mA 4, 5
Dropout voltage
*3
V
drop
I
OUT
= 100 mA
1.2 V
V
OUT
(
S
)
< 1.3 V 0.50 0.54 0.58 V 2, 3
1.3 V
V
OUT
(
S
)
< 1.4 V 0.40 0.44 0.48 V 2, 3
1.4 V
V
OUT
(
S
)
< 1.5 V 0.30 0.34 0.39 V 2, 3
1.5 V
V
OUT
(
S
)
< 1.7 V
0.26 0.39 V 2, 3
1.7 V
V
OUT
(
S
)
< 2.0 V
0.20 0.35 V 2, 3
2.0 V
V
OUT
(
S
)
< 2.8 V
0.16 0.24 V 2, 3
2.8 V
V
OUT
(
S
)
5.0 V
0.13 0.23 V 2, 3
Line regulation
OUTIN
OUT1
VV
V
V
OUT(S)
0.5 V
V
IN
6.5 V, I
OUT
= 30 mA
0.05 0.2 %/V 2, 3
Load regulation
V
OUT2
V
IN
= V
OUT
(
S
)
1.0 V, 100
A
I
OUT
100 mA
20 40 mV 2, 3
Output voltage
temperature coefficient
*4
OUT
OUT
VTa
V
V
IN
= V
OUT(S)
1.0 V, I
OUT
= 30 mA,
40
C
Ta
+85
C
120
ppm/
C2, 3
Current consumption
during operation
(per circuit)
I
SS1
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON, no load
1.2 V
V
OUT
(
S
)
< 1.5 V
35 45
A 1
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON, no load
1.5 V
V
OUT
(
S
)
< 1.8 V
32 45
A 1
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON, no load
1.8 V
V
OUT
(
S
)
5.0 V
25 45
A 1
Current consumption
during shutdown I
SS2
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = OFF, no load
0.1 1.0
A 1
Input voltage V
IN
1.7
6.5 V 1
ON/OFF pin
input voltage “H” V
SH
V
IN
= V
OUT(S)
1.0 V, R
L
= 1.0 k
1.2
V
6, 7
ON/OFF pin
input voltage “L” V
SL
V
IN
= V
OUT(S)
1.0 V, R
L
= 1.0 k
0.3 V
6, 7
ON/OFF pin
input current “H” I
SH
V
IN
= 6.5 V,
V
ON/OFF
= 6.5 V
B (2ch)/C (1ch)/D/E/F/G/H type
0.1
0.1
A 6, 7
A/B (1ch)/C (2ch) type 1.0 2.5 4.2
A
ON/OFF pin
input current “L” I
SL
V
IN
= 6.5 V,
V
ON/OFF
= 0 V
A/B (1ch)/C (2ch)/E/F/G/H type
0.1
0.1
A 6, 7
B (2ch)/C (1ch)/D type 1.0 2.5 4.2
A
Ripple rejection
RR
V
IN
= V
OUT(S)
1.0 V,
f = 1.0 kHz,
V
rip
= 0.5 Vrms,
I
OUT
= 30 mA
1.2 V
V
OUT(S)
< 1.8 V
80
dB
8, 9
1.8 V
V
OUT(S)
< 3.1 V
75
dB
8, 9
3.1 V
V
OUT(S)
5.0 V
70
dB
8, 9
Short-circuit current I
short
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON, V
OUT
= 0 V
150
mA
4, 5
Shutdown pull-up/pull-
down resistor R
PD
1.5 2.6 6.5 M
6, 7
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
15
*1. VOUT(S): Set output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT(= 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. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
VOUT
Ta []
mV/°C *1 = VOUT(S)[]
V*2 VOUT
TaVOUT
[]
ppm/°C *3 1000
*1. Change in temperature of output voltage
*2. Set 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 value 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.2.1_02
16
Test Circuit
1. VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
A
*1
*1
*1. Set to VIN or GND
Figure 12
2.
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
A
*1
*2
V
*1. Set to OFF
*2. Set to ON
Figure 13
3.
*1
*2
*1. Set to ON
*2. Set to OFF
A
V
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
Figure 14
4.
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
A
*1
*2
V
*1. Set to OFF
*2. Set to VIN or GND
Figure 15
5.
*1
*2
*1. Set to VIN or GND
*2. Set to OFF
A
V
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
Figure 16
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
17
6.
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
A
*1
V
*1. Set to OFF
R
L
Figure 17
7.
*1
*1. Set to OFF
R
L
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
A
V
Figure 18
8.
*1
V
*1. Set to OFF
*2. Set to ON
R
L
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
*2
Figure 19
9.
*1
*1. Set to ON
*2. Set to OFF
*2
R
L
V
VIN
VOUT2 VOUT1
ON/OFF2 ON/OFF1
VSS
Figure 20
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
18
Standard Circuit
*1. C
IN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 1.0 F 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
*2
CL1
*2
CIN
*1
Figure 21
Caution The above connection diagram 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 F or more
Output capacitor (CL1, CL2) : 1.0 F or more
Caution Generally a series regulator may cause oscillation, depending on the selection of external parts.
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 capacitor between the VOUT pin and VSS pin for phase compensation.
Operation is stabilized by a ceramic capacitor with an output capacitance of 1.0 F or more over the entire temperature
range. When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, the capacitance must
be 1.0 F or more.
The value of the output overshoot 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 CIN 1.0 F, CL1 1.0 F, CL2 1.0 F; however, when selecting
the output capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual
device.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
19
Explanation of Terms
1. Low dropout voltage regulator
This 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 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 the “ Electrical Characteristics” and “ Characteristics
(Typical Data) (Per Circuit)” for details.
3. Line regulation
Indicates the dependency of the output voltage on the input voltage. 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 (VOUT2)
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 difference between input voltage (VIN1) and the output voltage when; decreasing input voltage (VIN)
gradually until the output voltage has dropped out to the value of 98% of output voltage (VOUT3), which is at VIN =
VOUT(S) 1.0 V.
Vdrop VIN1  (VOUT3 0.98)
VOUT1
VIN VOUT
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
20
6. Output voltage temperature coefficient
The shaded area in Figure 22 is the range where VOUT varies in the operation temperature range when the output
voltage temperature coefficient is 120 ppm/C.
Example of VOUT = 3.0 V typ. product
40 25
0.36 mV/C
VOUT [V]
85 Ta [C]
VOUT(E)*1
0.36 mV/C
*1. VOUT(E) is the value of the output voltage measured at Ta = 25C.
Figure 22
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
VOUT
Ta []
mV/°C *1 = VOUT(S)[]
V*2 VOUT
TaVOUT
[]
ppm/°C *3 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
VOUT
Ta VOUT
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
21
Operation
1. Basic operation
Figure 23 shows the block diagram of S-1721 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the constant
output voltage which is not influenced by the input voltage and temperature change, to the output transistor.
*1
*1. Parasitic diode
VSS
Current
supply
Vfb
Vref
VIN
VOUT
Rf
Rs
Error
amplifier
Reference voltage
circuit
Figure 23
2. Output transistor
In the S-1721 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN 0.3 V to prevent the voltage regulator from being damaged due to reverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential of VOUT became higher
than VIN.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
22
3. ON/OFF pin 1 and 2
These pins start and stop the regulator.
When the ON/OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in P-channel MOS
FET output transistor between the VIN pin and VOUT pin is turned off, reducing current consumption significantly.
The VOUT pin becomes the VSS level due to the internally divided resistance of several hundreds k between the
VOUT pin and the VSS pin.
Note that the current consumption increases when a voltage of 0.3 V to 1.2 V (@Ta = 25C) 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 type, the
ON/OFF pin is internally pulled up to VIN pin or pulled down to VSS pin 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 type, the ON/OFF pin is not internally pulled up or pulled down, so do not use it
in the floating status.
When not using the ON/OFF pin in the S-1721 Series E, F, G, and H type, connect the ON/OFF pin to the VIN pin in
the E/F (1ch only), and G (2ch only) type. In the F (2ch only)/G (1ch only) and H type, connect the ON/OFF pin to
the VSS pin.
Table 11
Product Type ON/OFF Pin Internal
Circuits VOUT Pin Voltage Current
Consumption
A type 1ch “H”: ON
2ch “H”: ON
Operate
Operate
Set value
Set value
ISS1
ISS1
B type 1ch “H”: ON
2ch “L”: ON
Operate
Operate
Set value
Set value
ISS1
ISS1
C type 1ch “L”: ON
2ch “H”: ON
Operate
Operate
Set value
Set value
ISS1
ISS1
D type 1ch “L”: ON
2ch “L”: ON
Operate
Operate
Set value
Set value
ISS1
ISS1
E type 1ch “L”: OFF
2ch “L”: OFF
Stop
Stop
VSS level
VSS level
ISS2
ISS2
F type 1ch “L”: OFF
2ch “H”: OFF
Stop
Stop
VSS level
VSS level
ISS2
ISS2
G type 1ch “H”: OFF
2ch “L”: OFF
Stop
Stop
VSS level
VSS level
ISS2
ISS2
H type 1ch “H”: OFF
2ch “H”: OFF
Stop
Stop
VSS level
VSS level
ISS2
ISS2
(1) S-1721 Series A, B, C, D type (2) S-1721 Series E, F, G, H type
VSS
VIN
ON/OFF
B (2ch), C (1ch), D type
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.2.1_02 S-1721 Series
23
4. Overcurrent protection circuit
The S-1721 Series has a built-in overcurrent protection circuit having the characteristics shown in “(1) Output
Voltage vs. Output Current (When Load Current Increases) (Ta = 25°C)” in “ Characteristics (Typical Data)
(Per Circuit)”, 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 when the output pin is short-circuited (Ishort) is internally set at
approx. 150 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.
5. Pull-down/pull-up resistor (S-1721 Series A, B, C, and D type)
In the S-1721 Series A, B, C, and D type, the ON/OFF pin is internally pulled up to VIN pin or pulled down to VSS
pin in the floating status, so the VOUT pin is set to VSS level.
In A/B (1ch only) and C (2ch only), the ON/OFF pin is connected to VIN pin,
In B (2ch only)/C (1ch only)/D type, the ON/OFF pin is connected to VSS pin;
Note that during operation in these cases, the current consumption of the IC is generated as much as the current
which flows into a pull-up resistor of 2.6 M or a pull-down resistor of 2.6 M.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
24
Precautions
Wiring patterns for the VIN pin, the VOUT pin and GND should be designed and that the impedance is low. When
mounting an output capacitor between the VOUT pin and VSS pin (CL1, CL2), a capacitor for stabilizing the input
between the VIN pin and the VSS pin (CIN), 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 (1.0 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.
Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for the S-1721 Series. However, be sure to perform sufficient evaluation under the
actual usage conditions for selection, including evaluation of temperature characteristics. Refer to “(5) Example of
Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25C)” in “ Reference Data (Per
Circuit)” for the equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN) : 1.0 F or more
Output capacitor (CL1, CL2) : 1.0 F 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 around 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.
Overshoot may occur in the output voltage momentarily if the 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 10 in “
Electrical Characteristics” and footnote *5 of the table.
ABLIC Inc. 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.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
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
V
OUT
[V]
1.2
0.8
0.4
0
I
OUT
[mA]
1.6
300
1.4
1.0
0.6
0.2
V
IN
= 1.5 V
1.7 V
2.2 V
3.2 V
6.5 V
V
OUT
[V]
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
I
OUT
[mA]
0 100 200 400300
V
IN
= 3.3 V
3.5 V
4.0 V
5.0 V
6.5 V
VOUT = 5.0 V
0 100 200 400
V
OUT
[V]
5
3
1
0
I
OUT
[mA]
6
300
4
2
V
IN
= 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 of 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
1.0 1.5 2.0 2.5 3.0
VOUT [V]
1.30
1.20
1.15
1.05
1.00
VIN [V]
3.5
IOUT = 1 mA
IOUT = 50 mA
IOUT = 30 mA
1.10
1.25
2.5 3.0 3.5 4.0 4.5
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
I
OUT
= 1 mA
I
OUT
= 50 mA
I
OUT
= 30 mA
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
26
(3) Dropout Voltage vs. Output Current
VOUT = 1.2 V VOUT = 3.0 V
0100 200
V
drop
[V]
0.45
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
I
OUT
[mA]
15050
85°C
25°C
−40°C
0.40
0100 200
V
drop
[V]
0.30
0.20
0.15
0.10
0.05
0
I
OUT
[mA]
15050
85°C
25°C
−40°C
0.25
VOUT = 5.0 V
0100 200
V
drop
[V]
0.25
0.20
0.15
0.10
0.05
0
I
OUT
[mA]
15050
85°C
25°C
−40°C
(4) Dropout Voltage vs. Set Output Voltage
023
V
drop
[V]
0.40
0.35
0.25
0.20
0.15
0.10
0.05
V
OUT(S)
[V]
1456
0
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.2.1_02 S-1721 Series
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
02 567
ISS1 [μA]
35
25
10
0
VIN [V]
134
40
30
20
15
5
85
°C
25
°C
−40
°C
02 567
ISS1 [μA]
35
25
10
0
VIN [V]
134
40
30
20
15
5
85
°C
25
°C
−40
°C
VOUT = 5.0 V
02 567
ISS1 [μA]
35
25
10
0
VIN [V]
134
40
30
20
15
5
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.2.1_02
28
(7) Ripple Rejection (Ta = 25°C)
VOUT = 1.2 V
VIN = 2.2 V, CLn = 1.0 F
VOUT = 3.0 V
VIN = 4.0 V, CLn = 1.0 F
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
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VOUT = 5.0 V
VIN = 6.0 V, CLn = 1.0 F
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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.2.1_02 S-1721 Series
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, t
r
= tf = 5.0 s, CLn = 1.0 F, CIN = 1.0 F
VOUT = 3.0 V
IOUT = 30 mA, t
r
= tf = 5.0 s, CLn = 1.0 F, CIN = 1.0 F
V
OUT
[V]
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
t [μs]
V
IN
[V]
4.0
3.0
2.5
2.0
0
0.5
1.0
1.5
3.5
−50 200 3000 50 100 150 250 350−100
V
OUT
V
IN
V
OUT
[V]
3.10
3.08
3.06
3.04
3.02
3.00
2.98
2.96
t [μs]
V
IN
[V]
7.0
5.0
4.0
0
1.0
2.0
3.0
6.0
−50 200 3000 50 100 150 250 350−100
V
OUT
V
IN
VOUT = 5.0 V
IOUT = 30 mA, t
r
= tf = 5.0 s, CLn = 1.0 F, CIN = 1.0 F
V
OUT
[V]
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
t [μs]
V
IN
[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
V
OUT
V
IN
(2) Transient Response Characteristics of Load (Ta = 25°C)
V
OUT
= 1.2 V
V
IN
= 2.2 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
50 mA
V
OUT
= 1.2 V
V
IN
= 2.2 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
100 mA
V
OUT
[V]
1.46
1.42
1.34
1.30
1.26
1.22
1.14
1.10
t [μs]
I
OUT
[mA]
100
25
0
−150
−125
−50
−25
75
−50 200 3000 50 100 150 250 350−100
50
−100
1.18
1.38
V
OUT
I
OUT
V
OUT
[V]
1.42
1.38
1.30
1.26
1.22
1.18
1.10
1.06
t [μs]
I
OUT
[mA]
200
50
0
−250
−200
−100
−50
150
−50 200 3000 50 100 150 250 350−100
V
OUT
I
OUT
100
−150
1.14
1.34
V
OUT
= 3.0 V
V
IN
= 4.0 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
50 mA
V
OUT
= 3.0 V
V
IN
= 4.0 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
100 mA
V
OUT
[V]
3.25
3.20
3.10
3.05
3.00
2.95
2.85
2.80
t [μs]
I
OUT
[mA]
100
25
0
−125
−100
−50
−25
75
−50 200 3000 50 100 150 250 350−100
50
−75
2.90
3.15
V
OUT
I
OUT
VOUT [V]
3.25
3.20
3.10
3.05
3.00
2.95
2.85
2.80
t [μs]
IOUT [mA]
200
50
0
−250
−200
−100
−50
150
−50 200 3000 50 100 150 250 350−100
100
−150
2.90
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.2.1_02
30
V
OUT
= 5.0 V
V
IN
= 6.0 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
50 mA
V
OUT
= 5.0 V
V
IN
= 6.0 V, C
Ln
= 1.0
F, C
IN
= 1.0
F, I
OUT
= 10 mA
100 mA
V
OUT
[V]
5.50
5.40
5.20
5.10
5.00
4.90
4.70
4.60
t [μs]
I
OUT
[mA]
100
25
0
−125
−100
−50
−25
75
−50 200 3000 50 100 150 250 350−100
50
−75
4.80
5.30
V
OUT
I
OUT
VOUT [V]
5.50
5.40
5.20
5.10
5.00
4.90
4.70
4.60
t [μs]
IOUT [mA]
200
50
0
−250
−200
−100
−50
150
−50 200 3000 50 100 150 250 350−100
100
−150
4.80
5.30
VOUT
IOUT
(3) Transient Response Characteristics of ON/OFF Pin (Ta = 25°C)
VOUT = 1.2 V
VIN = 2.2 V, t
r
= 5.0 s, CLn = 1.0 F, CIN = 1.0 F, IOUT = 100 mA
VOUT = 3.0 V
VIN = 4.0 V, t
r
= 5.0 s, CLn = 1.0 F, CIN = 1.0 F, IOUT = 100 mA
V
OUT
[V]
1.2
0.8
0.4
0
t [μs]
V
ON / OFF
[V]
4.0
2.0
0
0 50 100 150 200
V
OUT
V
ON / OFF
1.6
2.0
2.4
−2.0
−4.0
−6.0
−8.0
V
OUT
[V]
3.0
2.0
1.0
0
t [μs]
V
ON / OFF
[V]
6.0
4.0
0
0 50 100 150 200
V
OUT
V
ON / 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, t
r
= 5.0 s, CLn = 1.0 F, CIN = 1.0 F, IOUT = 100 mA
V
OUT
[V]
3.0
2.0
1.0
0
t [μs]
V
ON / OFF
[V]
8.0
4.0
0
0 50 100 150 200
2.0
4.0
5.0 V
OUT
V
ON / 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.2.1_02 S-1721 Series
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 F, CIN = 1.0 F,
IOUT1 = 10 mA 100 mA, IOUT2 = no load
VOUT1 = VOUT2 = 3.0 V
VIN = 4.0 V, CL1 = CL2 = 1.0 F, CIN = 1.0 F,
IOUT1 = 10 mA 100 mA, IOUT2 = no load
V
OUT1
[V]
1.26
1.22
1.18
1.10
1.06
t [μs]
−50 200 3000 50 100 150 250 350−100
1.14 V
OUT1
V
OUT2
[V]
1.30
1.26
1.22
1.18
1.14
V
OUT2
I
OUT1
[mA]
150
0
−50
100
50
I
OUT1
V
OUT1
[V]
3.05
3.00
2.95
2.85
2.80
t [μs]
−50 200 3000 50 100 150 250 350−100
2.90
V
OUT2
[V]
3.10
3.05
3.00
2.95
2.90
V
OUT2
I
OUT1
[mA]
150
0
−50
100
50
I
OUT1
V
OUT1
VOUT1 = VOUT2 = 5.0 V
VIN = 6.0 V, CL1 = CL2 = 1.0 F, CIN = 1.0 F,
IOUT1 = 10 mA 100 mA, IOUT2 = no load
V
OUT1
[V]
5.10
5.00
4.90
4.70
4.60
t [μs]
−50 200 3000 50 100 150 250 350−100
4.80
V
OUT2
[V]
5.20
5.10
5.00
4.90
4.80
V
OUT2
I
OUT1
[mA]
150
0
−50
100
50
I
OUT1
V
OUT1
(5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25C)
100
0 150
IOUT [mA]
RESR []
CIN = CLn = 1.0
F
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.2.1_02
32
Marking Specifications
(1) SNT-6A
Top view
132
645
(1) (2) (3)
(4) (5) (6)
(1) to (3) : Product code (Refer to Product name vs. Product code)
(4) to (6) : Lot number
Product name vs. Product code
(a) S-1721 Series A type
Product Name Product code Product Name Product code
(1) (2) (3) (1) (2) (3)
S-1721A1212-I6T1U S 2 B S-1721A2515-I6T1U S 6 P
S-1721A1215-I6T1U S 2 D S-1721A2518-I6T1U S 2 Z
S-1721A1218-I6T1U S 2 S S-1721A2525-I6T1U S 6 Q
S-1721A1225-I6T1U S 6 D S-1721A2528-I6T1U S 6 R
S-1721A1226-I6T1U S 6 7 S-1721A252J-I6T1U S 6 S
S-1721A1228-I6T1U S 6 E S-1721A2530-I6T1U S 6 T
S-1721A122J-I6T1U S 6 F S-1721A2533-I6T1U S 6 U
S-1721A1230-I6T1U S 6 G S-1721A2613-I6T1U S 6 A
S-1721A1233-I6T1U S 2 N S-1721A2812-I6T1U S 6 B
S-1721A1C18-I6T1U S 2 W S-1721A2815-I6T1U S 2 H
S-1721A1512-I6T1U S 6 H S-1721A2818-I6T1U S 2 I
S-1721A1513-I6T1U S 2 P S-1721A2825-I6T1U S 6 V
S-1721A1515-I6T1U S 2 Q S-1721A2826-I6T1U S 2 8
S-1721A1518-I6T1U S 6 I S-1721A2828-I6T1U S 2 A
S-1721A1525-I6T1U S 6 J S-1721A282J-I6T1U S 6 W
S-1721A152J-I6T1U S 6 K S-1721A2830-I6T1U S 6 X
S-1721A1530-I6T1U S 6 L S-1721A2833-I6T1U S 6 C
S-1721A1533-I6T1U S 6 M S-1721A2J12-I6T1U S 6 9
S-1721A1812-I6T1U S 2 T S-1721A2J15-I6T1U S 7 A
S-1721A1815-I6T1U S 6 N S-1721A2J18-I6T1U S 2 V
S-1721A1818-I6T1U S 2 X S-1721A2J2J-I6T1U S 2 J
S-1721A1825-I6T1U S 2 F S-1721A2J33-I6T1U S 6 8
S-1721A1826-I6T1U S 2 7 S-1721A3018-I6T1U S 2 6
S-1721A1828-I6T1U S 2 G S-1721A3028-I6T1U S 6 Y
S-1721A1829-I6T1U S 6 4 S-1721A3030-I6T1U S 2 K
S-1721A182J-I6T1U S 2 U S-1721A3033-I6T1U S 6 Z
S-1721A1830-I6T1U S 2 3 S-1721A3119-I6T1U S 2 L
S-1721A1833-I6T1U S 2 2 S-1721A3318-I6T1U S 2 M
S-1721A2020-I6T1U S 2 C S-1721A3330-I6T1U S 6 2
S-1721A2121-I6T1U S 2 R S-1721A3333-I6T1U S 2 O
S-1721A2512-I6T1U S 6 O
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.1_02 S-1721 Series
33
(b) S-1721 Series B type (e) S-1721 Series E type
Product Name Product code Product Name Product code
(1) (2) (3) (1) (2) (3)
S-1721B1515-I6T1U S 3 A S-1721E1328-I6T1U S 5 A
S-1721B1518-I6T1U S 3 B S-1721E1528-I6T1U S 5 B
S-1721B1812-I6T1U S 3 C S-1721E1828-I6T1U S 5 D
S-1721B1818-I6T1U S 3 D S-1721E1833-I6T1U S 5 L
S-1721B2818-I6T1U S 3 E S-1721E2518-I6T1U S 5 E
S-1721B2J2J-I6T1U S 3 F S-1721E2525-I6T1U S 5 F
S-1721E2530-I6T1U S 5 O
(c) S-1721 Series C type S-1721E2818-I6T1U S 5 G
Product Name Product code S-1721E2833-I6T1U S 5 H
(1) (2) (3) S-1721E2J25-I6T1U S 5 K
S-1721C2J2J-I6T1U S 4 A S-1721E2J2J-I6T1U S 5 I
S-1721E3012-I6T1U S 5 S
(d) S-1721 Series D type S-1721E3025-I6T1U S 5 P
Product Name Product code S-1721E3033-I6T1U S 5 J
(1) (2) (3)
S-1721D1818-I6T1U S 4 T
S-1721D3318-I6T1U S 4 S
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series Rev.2.1_02
34
(2) SOT-23-6
123
465
Top view
(1) (2) (3) (4)
(1) to (3) : Product code (Refer to Product name vs. Product code)
(4) : Lot number
Product name vs. Product code
(a) S-1721 Series A type
Product Name Product code Product Name Product code
(1) (2) (3) (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 Name Product code Product Name Product code
(1) (2) (3) (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 Name Product code S-1721E1828-M6T1x S 5 D
(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 Name Product code S-1721E2818-M6T1x S 5 G
(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. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
SNT-6A-A-PKG Dimensions
PG006-A-P-SD-2.1
No. PG006-A-P-SD-2.1
0.2±0.05
0.48±0.02
0.08 +0.05
-0.02
0.5
1.57±0.03
123
45
6
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
Feed direction
4.0±0.1
2.0±0.05
4.0±0.1
ø1.5 +0.1
-0
ø0.5
1.85±0.05 0.65±0.05
0.25±0.05
mm
PG006-A-C-SD-2.0
SNT-6A-A-Carrier Tape
No. PG006-A-C-SD-2.0
+0.1
-0
1
2
4
3
56
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY.
No. PG006-A-R-SD-1.0
PG006-A-R-SD-1.0
Enlarged drawing in the central part
SNT-6A-A-Reel
5,000
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
SNT-6A-A
-Land Recommendation
PG006-A-L-SD-4.1
No. PG006-A-L-SD-4.1
0.3
0.2
0.52
1.36
0.52
1
2
Caution 1. Do not do silkscreen printing and solder printing under the mold resin of the package.
2. The thickness of the solder resist on the wire pattern under the package should be 0.03 mm
or less from the land pattern surface.
3. Match the mask aperture size and aperture position with the land pattern.
4. Refer to "SNT Package User's Guide" for details.
1. (0.25 mm min. / 0.30 mm typ.)
2. (1.30 mm ~ 1.40 mm)
0.03 mm
SNT
1. Pay attention to the land pattern width (0.25 mm min. / 0.30 mm typ.).
2. Do not widen the land pattern to the center of the package ( 1.30 mm ~ 1.40 mm ).
1.
2. (1.30 mm ~ 1.40 mm)
(0.25 mm min. / 0.30 mm typ.)
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
2.9±0.2
0.15
1.9±0.2
123
4
65
0.35±0.15
0.95
+0.1
-0.05
0.95
mm
No. MP006-A-P-SD-2.1
MP006-A-P-SD-2.1
SOT236-A-PKG Dimensions
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
123
45
6
ø1.5 +0.1
-0 2.0±0.05
ø1.0 +0.2
-0 4.0±0.1
1.4±0.2
0.25±0.1
3.2±0.2
No. MP006-A-C-SD-3.1
MP006-A-C-SD-3.1
SOT236-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY 3,000
Enlarged drawing in the central part
No. MP006-A-R-SD-2.1
MP006-A-R-SD-2.1
SOT236-A-Reel
Disclaimers (Handling Precautions)
1. All the information described herein
(product data,
specifications,
figures,
tables,
programs,
algorithms and application
circuit examples,
etc.)
is current as of publishing date of this document and is subject to change without notice.
2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein
(hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use
of the information described herein.
3. ABLIC Inc. is not responsible for damages caused by the incorrect information described herein.
4. Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings,
operation voltage range and electrical characteristics, etc.
ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the
products outside their specified ranges.
5. When using the products, confirm their applications, and the laws and regulations of the region or country where they
are used and verify suitability, safety and other factors for the intended use.
6. When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related
laws, and follow the required procedures.
7. The products must not be used or provided (exported) for the purposes of the development of weapons of mass
destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to
develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use.
8. The products are not designed to be used as part of any device or equipment that may affect the human body, human
life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control
systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment,
aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do
not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc.
Especially, the products cannot be used for life support devices, devices implanted in the human body and devices
that directly affect human life, etc.
Prior consultation with our sales office is required when considering the above uses.
ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products.
9. Semiconductor products may fail or malfunction with some probability.
The user of the products should therefore take responsibility to give thorough consideration to safety design including
redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or
death, fires and social damage, etc. that may ensue from the products' failure or malfunction.
The entire system must be sufficiently evaluated and applied on customer's own responsibility.
10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the
product design by the customer depending on the intended use.
11. The products do not affect human health under normal use. However, they contain chemical substances and heavy
metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be
careful when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.
13. The information described herein contains copyright information and know-how of ABLIC Inc.
The information described herein does not convey any license under any intellectual property rights or any other
rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any
part of this document described herein for the purpose of disclosing it to a third-party without the express permission
of ABLIC Inc. is strictly prohibited.
14. For more details on the information described herein, contact our sales office.
2.2-2018.06
www.ablic.com
Mouser Electronics
Authorized Distributor
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