Datasheet > L3751

L3751

更新时间： 2024-09-29 14:58:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		控制器
页数	文件大小	规格书
42页	2892K
描述
6 V至75 V的宽输入电压同步降压控制器

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L3751 数据手册

L3751

Datasheet

Wide 6 V to 75 V input voltage synchronous buck controller

Features

•

Wide 6 V to 75 V input voltage range

Adjustable output voltage from 0.8 V to 60 V

100 kHz - 1 MHz switching frequency range

40 ns minimum on-time for extreme duty ratio

Low dropout operation during line transient

Adjustable soft-start or input voltage tracking

Pulse skipping or forced PWM operation at light load

Synchronization

Adjustable precision enable

Power Good open collector output validates V_OUT

7.5 V gate drivers for standard V_THMOSFETs

Constant current protection with hiccup mode

Precision or lossless programmable current sensing

Improved line transient response

Maturity status link

L3751

Input voltage undervoltage lockout

Internal voltage monitoring

Thermal protection

Operating junction temperature range: -40 °C to 150 °C

Applications

•

Telecom, networking and industrial applications

Failsafe systems

Unregulated 24 V and 48 V input voltage bus

Conversion from high voltage battery to 12 V and 5 V rail

Description

The 6 V to 75 V wide input voltage range L3751 synchronous buck controller features

extreme voltage conversion ratio over switching frequency range (100 kHz - 1 MHz)

thanks to 40 ns minimum conduction time.

The diode emulation (DEM) implements pulse skipping mode that maximizes the

efficiency at light-load giving controlled output voltage ripple. The forced PWM

(FPWM) over the load range makes the switching frequency constant and minimizes

the output voltage ripple.

The Power Good open collector output validates the regulated output voltage for

monitoring and it is useful to implement output voltage sequencing for digital ICs

during the power-up phase.

An embedded gate driver minimizes the number of external components and it is

designed for standard V_THMOSFET.

Embedded protections–output overcurrent, input voltage UVLO, internal voltage

monitoring, thermal shutdown - feature controlled and safe operation for critical

environments in telecom, networking and industrial applications.

The device is available in a QFN 20 leads 3.5 x 4.5 mm package with wettable flanks.

DS13841 - Rev 3 - February 2023

www.st.com

For further information contact your local STMicroelectronics sales office.

12 3 4 5 6 7...42

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与L3751相关器件

型号	品牌	获取价格	描述	数据表
L37-5-100-100-0.5-1A	ETC	获取价格	THERM PAD 100MMX100MM W/ADH GRAY
L37-5-100-100-1.0-0	ETC	获取价格	THERM PAD 100MMX100MM GRAY
L37-5-100-100-1.0-1A	ETC	获取价格	THERM PAD 100MMX100MM W/ADH GRAY
L37-5-100-100-10.0-0	ETC	获取价格	THERM PAD 100MMX100MM GRAY
L37-5-100-100-10.0-1A	ETC	获取价格	THERM PAD 100MMX100MM W/ADH GRAY
L37-5-100-100-2.0-0	ETC	获取价格	THERM PAD 100MMX100MM GRAY
L37-5-100-100-2.0-1A	ETC	获取价格	THERM PAD 100MMX100MM W/ADH GRAY
L37-5-100-100-3.0-0	ETC	获取价格	THERM PAD 100MMX100MM GRAY
L37-5-100-100-3.0-1A	ETC	获取价格	THERM PAD 100MMX100MM W/ADH GRAY
L37-5-100-100-5.0-0	ETC	获取价格	THERM PAD 100MMX100MM GRAY

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