Datasheet > L7983PU50R

L7983PU50R

更新时间： 2024-11-15 02:52:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
43页	1938K
描述
60 V, 300 mA synchronous step-down switching regulator with 10 Î¼A quiescent current

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L7983PU50R 数据手册

L7983

Datasheet

60 V, 300 mA synchronous step-down switching regulator with 10 µA quiescent

current

Features

•

3.5 V to 60 V operating input voltage

Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to V_IN

300 mA DC output current

Dynamic low consumption mode to low noise mode selection

10 µA operating quiescent current (L7983PU33R, V_IN> 24 V, LCM)

2.3 µA shutdown current

200 kHz to 2.2 MHz programmable switching frequency

Optional spread spectrum (dithering)

Internal soft-start

Enable / adjustable UVLO threshold

Synchronization to external clock

Internal compensation network

Internal current limiting

Overvoltage protection

Output voltage sequencing

Thermal shutdown

Applications

•

Designed for 12 V, 24 V and 48 V buses

Battery powered applications

Decentralized intelligent nodes

Fail safe system

Maturity status link

L7983

Sensors and low noise applications (LNM)

Description

The L7983 device is a step-down monolithic switching regulator able to deliver up to

300 mA DC based on peak current mode architecture.

The output voltage adjustability ranges from 0.85 V to V_IN. The wide input voltage

range and adjustable UVLO threshold meet the specification for the 12 V, 24 V and

48 V industrial bus standards.

The “Low Consumption Mode” (LCM) is designed for applications active during idle

mode, so it maximizes the efficiency at light load with controlled output voltage ripple.

The “Low Noise Mode” (LNM) makes the switching frequency constant overload

current range, meeting the low noise application specification. The L7983 supports

dynamic LCM to LNM transition.

The soft-start time is internally fixed and the output voltage supervisor manages the

reset phase for any digital load (microcontroller, FPGA, etc.).

The internal compensation network features high noise immunity, simple design and

saves on the component cost.

The RST open collector output can also implement output voltage sequencing during

the power-up phase.

DS13354 - Rev 1 - October 2020

www.st.com

For further information contact your local STMicroelectronics sales office.

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