Datasheet > L5985_08

L5985_08

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器开关
页数	文件大小	规格书
37页	973K
描述
2 A step-down switching regulator

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L5985_08 数据手册

L5985

2 A step-down switching regulator

Features

■ 2 A DC output current

■ 2.9 V to 18 V input voltage

■ Output voltage adjustable from 0.6 V

■ 250 kHz switching frequency, programmable

VFQFPN8 3 mm x 3 mm

up to 1 MHz

■ Internal soft-start and Inhibit

■ Low dropout operation: 100 % duty cycle

■ Voltage feed-forward

Description

The L5985 is a step down switching regulator with

2.5 A (min) current limited embedded power

MOSFET, so it is able to deliver up to 2 A DC

current to the load depending on the application

condition.

■ Zero load current operation

■ Over current and thermal protection

■ VFQFPN8 3 mm x 3 mm package

The input voltage can range from 2.9 V to 18 V,

while the output voltage can be set starting from

Applications

■ Consumer: STB, DVD, DVD recorder, car

0.6 V to V . Having a minimum input voltage of

audio, LCD TV and monitors

2.9 V, the device is suitable for 3.3 V bus.

■ Industrial: Chargers, PLD, PLA, FPGA

Requiring a minimum set of external components,

the device includes an internal 250 kHz switching

frequency oscillator that can be externally

adjusted up to 1 MHz.

■ Networking: XDSL, modems, DC-DC modules

■ Computer: Optical storage, hard disk drive,

printers, audio/graphic cards

The VFQFPN8 package with exposed pad allows

■ LED driving

reducing the R

60 °C/W.

down to approximately

thJA

Figure 1. Application circuit

September 2008

Rev 3

1/37

www.st.com

12 3 4 5 6 7...37

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