L6928 datasheet(1/16 Pages) STMICROELECTRONICS

部件名	L6928

功能描述	High efficiency monolithic synchronous step down regulator

PDF	16 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 16 page

October 2006

Rev 4

1/16

16

L6928

High efficiency monolithic synchronous step down regulator

General features

■ 2V to 5.5V battery input range

■ High efficiency: up to 95%

■ Internal synchronous switch

■ No external schottky required

■ Extremely low quiescent current

■ 1

µA max shutdown supply current

■ 800mA max output current

■ Adjustable output voltage from 0.6V

■ Low drop-out operation: up to 100% duty cycle

■ Selectable low noise/low consumption mode at

light load

■ Power good signal

■ ±1% output voltage accuracy

■ Current-mode control

■ 1.4MHz switching frequency

■ Externally synchronizable

from 1MHz to 2MHz

■ OVP

■ Short circuit protection

Applications

■ Battery-powered equipments

■ Portable instruments

■ Cellular phones

■ PDAs and hand held terminals

■ DSC

■ GPS

Description

The device is dc-dc monolithic regulator

specifically designed to provide extremely high

efficiency.

L6928 supply voltage can be as low as 2V

allowing its use in single Li-ion cell supplied

applications. Output voltage can be selected by

an external divider down to 0.6V. Duty Cycle can

saturate to 100% allowing low drop-out operation.

The device is based on a 1.4MHz fixed-frequency,

current mode-architecture.

Low Consumption Mode operation can be

selected at light load conditions, allowing

switching losses to be reduced. L6928 is

externally synchronizable with a clock which

makes it useful in noise-sensitive applications.

Other features like Powergood, Overvoltage

protection, Shortcircuit protection and Thermal

Shutdown (150°C) are also present.

MSOP8

VFQFPN8

www.st.com

Application test circuit

L 4.7

µH

SYNC

LX

VFB

C1

10

µF

6.3V

C2

220pF

C4

10

µF

6.3V

R2

200K

R3

500K

R1

100K

VIN=2V to 5.5V

VOUT=1.8V

VCC

RUN

COMP

GND

PGOOD

D01IN1528

7

6

1

8

3

5

24

类似零件编号 - L6928

制造商	部件名	数据表	功能描述
STMicroelectronics	L6928	194Kb / 16P	High efficiency monolithic synchronous step down regulator 11-Apr-2011
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	L6928D	194Kb / 16P	High efficiency monolithic synchronous step down regulator 11-Apr-2011
	L6928D013TR	197Kb / 9P	HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR Rev. 2

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类似说明 - L6928

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