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L6928D

February 2005

1FEATURES

µA MAX SHUTDOWN SUPPLY CURRENT

DUTY CYCLE

CONSUMPTION MODE AT LIGHT LOAD

1MHz TO 2MHz

2APPLICATIONS

3DESCRIPTION

The device is dc-dc monolithic regulator specifically

designed to provide extremely high efficiency.

L6928D supply voltage can be as low as 2V allowing

its use in single Li-ion cell supplied applications. Out-

put voltage can be selected by an external divider

down to 0.6V. Duty Cycle can saturate to 100% al-

lowing low drop-out operation. The device is based

on a 1.4MHz fixed-frequency, current mode-architec-

ture. Low Consumption Mode operation can be se-

lected at light load conditions, allowing switching

losses to be reduced. L6928D is externally synchro-

nizable with a clock which makes it useful in noise-

sensitive applications. Other features like Power-

good, Overvoltage protection, Shortcircuit protection

and Thermal Shutdown (150°C) are also present.

HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS

STEP DOWN REGULATOR

Figure 2. 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

Figure 1. Packages

Table 1. Order Codes

Part Number

Package

L6928D

MSOP8 in Tube

L6928D013TR

MSOP8 in Tape & Reel

MSOP8

Rev. 2