NR263S Datasheet, PDF (1/29 Pages) Sanken electric – Light Load High Efficiency Synchronous Buck Regulator IC

Light Load High Efficiency Synchronous Buck Regulator IC
NR263S
DATA SHEET
General Descriptions
The NR263S is Synchronous Rectification buck
regulator ICs integrates PowerMOSFETs. With the
current mode control, ultra low ESR capacitors such
as ceramic capacitors can be used. The ICs can
realize super-high efficiency by performing pulse
skip operation at light load condition. The ICs have
protection functions such as Over-Current Protection
(OCP), Under-Voltage Lockout (UVLO) and
Thermal Shutdown (TSD). Soft starting time can be
set up by selecting an external capacitor value. The
ON/OFF pin (EN Pin) turns the regulator ON/OFF.
The NR263S is available in an 8-pin SOP package.
Features & Benefits
● Synchronous Rectification with internal
PowerMOSFETs
● Current mode PWM control (Normal load)
● Pulse Skip Operation(at Light Load Condition)
● Up to 94% efficiency at normal load condition
● Up to 86% efficiency at light load condition
(@Vin=12V,Vout=5V,Iout=10mA)
● Stable with low ESR ceramic output capacitors
● Built-in protection function
Drooping type Over Current Protection (OCP) with
Auto-restart
Thermal Shutdown (TSD) with Auto-restart
Under Voltage Lockout(UVLO)
Vo Short Circuit Protection (HICCUP)
● By Vo = 5V fixed and external component count
reduction (NR263S)
● Soft-start Function by External Timing Capacitor
● Turn ON/OF the regulator function
Package
SOP8 Package
*Image: Not to scale
Electrical Characteristics
● Input Voltage Range V_IN = 8.0V～31V
● Output Voltage V_O=5V Fixed
● Output Current I_O=1A
● Operationg Frequency Fsw=500kHz Fixed
Applications
● Refrigerator
● Air conditioner
● LCD-TV
● Blu-ray
● Power supply for digital consumer
Basic Circuit Connection
NR263S (Vo=5V Fixed)
NR263S series-DSE Rev.1.0
SANKEN ELECTRIC CO.,LTD
1
2016.03.09
http://www.sanken-ele.co.jp/en/
© SANKEN ELECTRIC CO.,LTD. 2016