NR131S |Sanken Electric



Data Sheetdownload (PDF:871.56KB)
Application Notedownload (PDF:1509.67KB)


NR131S is a switching regulator IC with built-in power MOSFET.
Supports ultra low ESR capacitor including ceramic capacitors, using current mode control.
Realizes high efficiency with pulse skip operation at light load.
The product reducies component count with built-in phase compensation.
Includes OCP, UVLO, TSD protection functions.
Soft start time can be adjusted by selecting the value of external capacitor. EN function allows ON/OFF with an external signal.
SOIC8 package.


・VIN=12V type for power supply bus unit
・Power supply for standby applications
 (TV, Audio, Motor Driver), USB-Power


・Current mode type PWM (normal load)
・Pulse skip operation (light load)
 Switch mode for pulse skip load current
・Up to 95% Efficiency
・Up to 85% Efficiency at light load
 (Vin=12V, Vo=5V, Io=10mA)
・Low ESR capacitor can be used for output
・Built-in phase compensation circuit
・Time adjustable soft start function
・External ON/OFF function
・Built-in protection functions
 -Overcurrent protection (OCP):
  Drooping-type, auto restart
 -Thermal shutdown (TSD): Auto restart
 -Undervoltage lock out circuit (UVLO)
・DIP8 package suitable for single sided PCB



Package Name:SOIC8

Package Diagram

Design Support


Built-in PowerYES
Output Voltage0.8V to 14V
Output Current3.0A
Input Voltage Range4.5V to 17V
Operating Frequency350kHz
Current Mode ControlYES
Maximum Input Voltage19.0V
Minimum Input Voltage4.5V
Output on/offYES
Low ESR Capacitor SupportYES
Overcurrent ProtectionDrooping Type
Phase CompensationBuilt-in
Thermal ProtectionYES

Representative Circuit

Internal Block Diagram

Pin-Out Diagrams

Data Sheetdownload (PDF:871.56KB)
Application Notedownload (PDF:1509.67KB)
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