L5985 datasheet(1/36 Pages) STMICROELECTRONICS

部件名	L5985

功能描述	2A step-down switching regulator

PDF	36 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 36 page

October 2007

Rev 2

1/36

1

L5985

2A step-down switching regulator

Features

■ 2A DC output current

■ 2.9V to 18V input voltage

■ Output voltage adjustable from 0.6V

■ 250KHz switching frequency, programmable

up to 1MHz

■ Internal Soft-start and Inhibit

■ Low dropout operation: 100% duty cycle

■ Voltage feed-forward

■ Zero load current operation

■ Over current and thermal protection

■ VQFN3x3-8L package

Applications

■ Consumer:

STB, DVD, DVD recorder, car audio, LCD TV

and monitors

■ Industrial:

Chargers, car battery, PLD, PLA, FPGA

■ Networking: XDSL, modems, DC-DC modules

■ Computer:

Optical storage, hard disk drive, printers,

audio/graphic cards

Description

The L5985 is a step down switching regulator with

2.5A current limited embedded power MOSFET,

so it is able to deliver up to 2A DC current to the

load depending on the application condition.

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

while the output voltage can be set starting from

0.6V to VIN. Having a minimum input voltage of

2.9V, the device is suitable for buses staring from

for 3.3V bus.

Requiring a minimum set of external components,

the device includes an internal 250KHz switching

frequency oscillator that can be externally

adjusted up to 1MHz.

The QFN package with exposed pad allows

reducing the RthJA down to approximately

60°C/W.

VFQFPN8 3x3

www.st.com

Figure 1.

Application circuit

类似零件编号 - L5985

制造商	部件名	数据表	功能描述
STMicroelectronics	L5985	971Kb / 37P	2 A step-down switching regulator 16-Sep-2008
	L5985TR	971Kb / 37P	2 A step-down switching regulator 16-Sep-2008
	L5985	971Kb / 37P	2 A step-down switching regulator 16-Sep-2008

More results

类似说明 - L5985

制造商	部件名	数据表	功能描述
STMicroelectronics	L4978	135Kb / 12P	2A STEP DOWN SWITCHING REGULATOR May-2000
	L5972D	173Kb / 10P	2A SWITCH STEP DOWN SWITCHING REGULATOR May-2003
	L5973AD	185Kb / 14P	2A SWITCH STEP DOWN SWITCHING REGULATOR Rev. 3
Anpec Electronics Corop...	APW1173	444Kb / 21P	2A SWITCH STEP DOWN SWITCHING REGULATOR
STMicroelectronics	L5973AD	488Kb / 21P	2A switch step down switching regulator 15-Jan-2007
Semtech Corporation	SC4518H	266Kb / 15P	600kHz, 2A Step-Down Switching Regulator
Semtech Corporation	SC4524B	770Kb / 18P	16V 2A Step-Down Switching Regulator
STMicroelectronics	L4978	584Kb / 13P	2A STEP DOWN SWITCHING REGULATOR May-2005
Semtech Corporation	SC4524A	776Kb / 19P	28V 2A Step-Down Switching Regulator
Samtec, Inc	SC4524CSETRT	573Kb / 22P	28V 2A Step-Down Switching Regulator