L7985 datasheet(1/42 Pages) STMICROELECTRONICS

部件名	L7985

功能描述	Voltage feed-forward

PDF	42 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 42 page

This is information on a product in full production.

September 2014

DocID022446 Rev 7

1/42

L7985

2 A step-down switching regulator

Datasheet

- production data

Features

 2 A DC output current

 4.5 V to 38 V input voltage

 Output voltage adjustable from 0.6 V

 250 KHz switching frequency, programmable

up to 1 MHz

 Internal soft-start and enable

 Low dropout operation: 100% duty cycle

 Voltage feed-forward

 Zero load current operation

 Overcurrent and thermal protection

 VFQFPN 3 x 3 - 10L and HSOP8 package

Applications

 Consumer: STB, DVD, DVD recorder, car

audio, LCD TV and monitors

 Industrial: PLD, PLA, FPGA, chargers

 Networking: XDSL, modems, DC-DC modules

 Computer: optical storage, hard disk drive,

printers, audio/graphic cards

 LED driving

Description

The L7985/A is a step-down switching regulator

with a 2.5 A (minimum) current limited embedded

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

current to the load depending on the application

conditions. The input voltage can range from

4.5 V to 38 V, while the output voltage can be set

starting from 0.6 V to VIN. 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

QFN and the HSOP packages with exposed pad

allow the reduction of RthJA down to 60 °C/W and

40 °C/W respectively.

Figure 1. Application circuit

VFQFPN10 3 x 3 mm

HSOP8 exp. pad

www.st.com

类似零件编号 - L7985

制造商	部件名	数据表	功能描述
STMicroelectronics	L7980	1Mb / 44P	2 A step-down switching regulator 13-Dec-2010
	L7980A	1Mb / 44P	2 A step-down switching regulator 13-Dec-2010
	L7980ATR	1Mb / 44P	2 A step-down switching regulator 13-Dec-2010
	L7980TR	1Mb / 44P	2 A step-down switching regulator 13-Dec-2010
	L7981	1Mb / 44P	3 A step-down switching regulator 01-Jul-2010

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类似说明 - L7985

制造商	部件名	数据表	功能描述
Texas Instruments	TPS40074	529Kb / 38P	MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
Intersil Corporation	ISL6740A	320Kb / 15P	Flexible Double-Ended Voltage-Mode PWM Controller with Voltage Feed Forward February 7, 2005
Texas Instruments	TPS40075	809Kb / 44P	MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
ON Semiconductor	CS51220	470Kb / 16P	Feed Forward Voltage Mode PWM Controller with Programmable Synchronization July, 2006??Rev. 7
Texas Instruments	TPS40074	999Kb / 42P	MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
	TPS40074	454Kb / 38P	MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
	TPS40075	1Mb / 44P	MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
STMicroelectronics	A5975AD	2Mb / 50P	Voltage feed-forward 19-Apr-2011
STMicroelectronics	A5975D	1Mb / 50P	Voltage feed-forward 19-Apr-2011
Renesas Technology Corp	ISL6740A	660Kb / 14P	Flexible Double-Ended Voltage-Mode PWM Controller with Voltage Feed Forward