L5985 datasheet(1/37 Pages) STMICROELECTRONICS

部件名	L5985

功能描述	2 A step-down switching regulator

PDF	37 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 37 page

September 2008

Rev 3

1/37

1

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

up to 1 MHz

■ Internal soft-start and Inhibit

■ Low dropout operation: 100 % duty cycle

■ Voltage feed-forward

■ Zero load current operation

■ Over current and thermal protection

■ VFQFPN8 3 mm x 3 mm package

Applications

■ Consumer: STB, DVD, DVD recorder, car

audio, LCD TV and monitors

■ Industrial: Chargers, PLD, PLA, FPGA

■ Networking: XDSL, modems, DC-DC modules

■ Computer: Optical storage, hard disk drive,

printers, audio/graphic cards

■ LED driving

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.

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

while the output voltage can be set starting from

0.6 V to VIN. Having a minimum input voltage of

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

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.

The VFQFPN8 package with exposed pad allows

reducing the RthJA down to approximately

60 °C/W.

VFQFPN8 3 mm x 3 mm

Figure 1.

Application circuit

www.st.com

类似零件编号 - L5985

制造商	部件名	数据表	功能描述
STMicroelectronics	L5985	955Kb / 36P	2A step-down switching regulator 16-Oct-2007
STMicroelectronics	L5985TR	955Kb / 36P	2A step-down switching regulator 16-Oct-2007

More results

类似说明 - L5985

制造商	部件名	数据表	功能描述
STMicroelectronics	L5973AD	491Kb / 21P	2 A switch step down switching regulator 10-Jan-2008
	B5973D	781Kb / 12P	2 A step down switching regulator for automotive applications 14-Jan-2008
	L5986	1Mb / 39P	2.5 A step-down switching regulator 28-Aug-2008
	L5987	1Mb / 42P	3 A step-down switching regulator 29-Aug-2008
	L5981	872Kb / 37P	1 A step-down switching regulator 09-Sep-2008
	L7980	1Mb / 44P	2 A step-down switching regulator 13-Dec-2010
	L7981ATR	1Mb / 44P	3 A step-down switching regulator 01-Jul-2010
	E-L5973AD	489Kb / 22P	2 A switch step down switching regulator 01-Nov-2009
ON Semiconductor	LV5744V	81Kb / 6P	2-channel Step-down Switching Regulator August, 2013
ON Semiconductor	LM2596	455Kb / 25P	3.0 A, Step-Down Switching Regulator November, 2008 ??Rev. 0