Datasheet > NR131S

NR131S

更新时间： 2024-11-21 17:15:43

品牌	Logo	应用领域
三垦 - SANKEN		过电流保护
页数	文件大小	规格书
13页	871K
描述
提供各种DC/DC转换控制IC，分别可对应输出电压固定/可变、宽范围输入电压、同步/非同步整流方式，低ESR要求。同时产品内置过电流保护，过热保护、UVLO等各种保护功能。

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NR131S 数据手册

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

NR131S

Jul./09/2015

General Descriptions

Package

 SOIC8

The NR131S 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

NR131S is available in an 8-pin SOIC 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

Electrical Characteristics

 3A Continuous output current

Over Current Protection (OCP)

 Operating input range V_IN= 4.5V～17V

 Output adjustable V_O= 0.8V～14V

 Fixed 350kHz frequency

Thermal Shutdown (TSD)

Under Voltage Lockout (UVLO)

 Built-in phase compensation

 Adjustable Soft-Start with an external capacitor

 Turn ON/OFF the regulator function

Programable Pulse-Skip operation

Applications

 LCD TV / Blue-ray / Set top box

 Green electronic products

 Other power supply

Typical Application Circuit

NR131S

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

SANKEN ELECTRIC CO., LTD.

Rev.2.0

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

12 3 4 5 6 7...13

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