Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC

SANKEN ELECTRIC CO., LTD.

Sep/10/2013

Rev.1.1

1

http://www.sanken-ele.co.jp

Tentative

General Descriptions

The NR130D series is buck regulator ICs integrates

High-side power MOSFETs. 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

or off and helps to achieve low power consumption

requirements. The NR130D series is available in an 8-pin

DIP package.

Features & Benefits

 Current mode PWM control

 Up to 94% efficiency at normal load condition

 Up to 85% efficiency at light load condition

 Stable with low ESR ceramic output capacitors

 Built-in protection function

Over Current Protection (OCP)

Thermal Shutdown (TSD)

Under Voltage Lockout (UVLO)

 Built-in phase compensation

 Adjustable Soft-Start with an external capacitor

 Turn ON/OF the regulator function

Programable Pulse-Skip operation

Package

 DIP8

Electrical Characteristics

 3A Continuous output current

 Operating input range V

 Output adjustable V

 Fixed 350kHz frequency

Applications

 LCD TV / Blu-Ray / Set top box

 Green Electronic products

 Other power supply

Typical Application Circuit

Arial 10pt

発行日

C1, C2: 10μF / 25V, C4, C5: 22μF / 16V, C7: 0.1μF, C9:1800pF, C11: 220pF(Option), R1: 510kΩ , R3: 10Ω, R4: 36 kΩ, R5: 27kΩ

(VO=5.0V), R6: 12kΩ, R7:510kΩ(Option), D1: SJPJ-L4, L1: 10μH

NR131D

For NR131D