April 2011

Doc ID 11051 Rev 6

1/16

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L6928

High efficiency monolithic synchronous step down regulator

Features

light load

MHz

Applications

Description

The device is DC-DC monolithic regulator

specifically designed to provide extremely high

efficiency. L6928 supply voltage can be as low as

2 V allowing its use in single Li-Ion cell supplied

applications. Output voltage can be selected by

an external divider down to 0.6 V. Duty cycle can

saturate to 100% allowing low dropout operation.

The device is based on a 1.4 MHz 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 Power

Good, overvoltage protection, short-circuit

protection and thermal shutdown (150 °C) are

also present.

VFQFPN8

MSOP8

(3x3x1.0 mm)

Figure 1.

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

RUN

COMP

GND

PGOOD

D01IN1528

7

6

1

8

3

5

24

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