Power Management ICs

6.5 V Input, 400 mA Voltage Regulator with Reset Function S-1701 Series

The S-1701 Series, developed based on CMOS technology, is a voltage regulator with a reset function and integrates a high-accuracy voltage detector with on-chip delay circuit and a positive voltage regulator with a low dropout voltage and high output voltage on one chip. The S-1701 Series is available in many types according to the selection of the voltage detector block of the voltage detector, including a SENSE pin input product. A built-in low on-resistance transistor provides a low dropout voltage and large output current. Small ceramic capacitors are available and an external capacitor for delay is needless. Small SOT-23-5 and SOT-89-5 packages realize high-density mounting.


Regulator block

Output voltage
1.5 to 5.0 V, selectable in 0.1 V steps.
High-accuracy output voltage
High peak current capacity
400 mA output is possible. (@ Vin Vout(s) +2.0 V) *1
Built-in ON/OFF circuit
Ensures long battery life.
During power-off.1 µA typ., 1.0 µA max.
Low ESR capacitor can be used
A ceramic capacitor of 1.0 µF or more can be used for the output capacitor.
High ripple rejection
70 dB typ. (@ 1.0 kHz)
Built-in overcurrent protector
Overcurrent of output transistor can be restricted.
Operating voltage range
2.0 to 6.5 V

Detector block

Output voltage
1.5 to 5.5 V, selectable in 0.1 V steps.
High-accuracy output voltage
Output mode
Nch open-drain active low output
No need of an external capacitor for delay
Three delay time settings
No delay (60 µs), 50 ms, 100 ms
Operating voltage range
0.8 to 6.5 V

Whole regulator

Low current consumption
During operation 85 µA typ.
Lead-free products

*1. Attention should be paid to the power dissipation of the package when the output current is large.


  • Power supply and reset circuit for battery-powered devices
  • Power supply for personal communication devices
  • Power supply for home appliances

Standard Circuit

Standard Circuit

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.