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L6926D

HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS

STEP DOWN REGULATOR

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

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2V TO 5.5V BATTERY INPUT RANGE

HIGH EFFICIENCY: UP TO 95%

INTERNAL SYNCHRONOUS SWITCH

NO EXTERNAL SCHOTTKY REQUIRED

EXTREMELY LOW QUIESCENT CURRENT

1碌A(chǔ) MAX SHUTDOWN SUPPLY CURRENT

800mA MAX OUTPUT CURRENT

ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V

LOW DROP-OUT OPERATION: UP TO100%

DUTY CYCLE

SELECTABLE LOW NOISE/LOW

CONSUMPTION MODE AT LIGHT LOAD

POWER GOOD SIGNAL

鹵1% OUTPUT VOLTAGE ACCURACY

CURRENT-MODE CONTROL

600kHz SWITCHING FREQUENCY

EXTERNALLY SYNCHRONIZABLE FROM

500kHz TO 1.4MHz

OVP

SHORT CIRCUIT PROTECTION

MSOP8

ORDERING NUMBERS: L6926D

L6926D013TR (Tape & Reel)

s

GPS

DESCRIPTION

The device is dc-dc monolithic regulator specifically

designed to provide extremely high efficiency.

L6926D 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 600kHz fixed-frequency, current mode-architec-

ture. Low Consumption Mode operation can be se-

lected at light load conditions, allowing switching

losses to be reduced. L6926D 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擄C) are also present.

APPLICATIONS

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BATTERY-POWERED EQUIPMENTS

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PORTABLE INSTRUMENTS

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CELLULAR PHONES

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PDAs AND HAND HELD TERMINALS

s

DSC

APPLICATION TEST CIRCUIT

L 6.8碌H

V

IN

=2V to 5.5V

C1

10碌F

6.3V

SYNC

V

CC

RUN

5

7

6

1

2

COMP

D01IN1305

V

OUT

=1.8V

R2

200K

C4

10碌F

6.3V

LX

R3

500K

8

PGOOD

4

C2

220pF

3

VFB

GND

R1

100K

May 2003

1/8

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