L6926(2004) 查看數據表（PDF） - STMicroelectronics

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L6926
(Rev.:2004)

HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR

STMicroelectronics 

L6926

HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS

STEP DOWN REGULATOR

1 FEATURES

■ 2V TO 5.5V BATTERY INPUT RANGE

■ HIGH EFFICIENCY: UP TO 95%

■ INTERNAL SYNCHRONOUS SWITCH

■ NO EXTERNAL SCHOTTKY REQUIRED

■ EXTREMELY LOW QUIESCENT CURRENT

■ 1µA 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

■ ±1% OUTPUT VOLTAGE ACCURACY

■ CURRENT-MODE CONTROL

■ 600kHz SWITCHING FREQUENCY

■ EXTERNALLY SYNCHRONIZABLE FROM

500kHz TO 1.4MHz

■ OVP

■ SHORT CIRCUIT PROTECTION

2 APPLICATIONS

■ BATTERY-POWERED EQUIPMENTS

■ PORTABLE INSTRUMENTS

■ CELLULAR PHONES

■ PDAs AND HAND HELD TERMINALS

■ DSC

■ GPS

Figure 2. Application Test Circuit

Figure 1. Packages

MSOP8

VFSON8 (3x4.9x1mm)

Table 1. Order Codes

Part Number

L6926

L6926013TR

L6926D1

L6926D1013TR

Package

MSOP8 in Tube

MSOP8 in Tape & Reel

VFSON-8 in Tube

VFSON8 in Tape & Reel

3 DESCRIPTION

The device is dc-dc monolithic regulator specifically

designed to provide extremely high efficiency.

L6926 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. L6926 is externally synchroni-

zable with a clock which makes it useful in noise-sen-

sitive applications. Other features like Powergood,

Overvoltage protection, Shortcircuit protection and

Thermal Shutdown (150°C) are also present.

VIN=2V to 5.5V

C1

10µF

6.3V

SYNC

7

VCC

6

RUN

1

2

COMP

D01IN1305

C2

220pF

L 6.8µH

5

LX

R3

500K

8

PGOOD

3

4

VFB

GND

R2

200K

R1

100K

November 2004

VOUT=1.8V

C4

10µF

6.3V

Rev. 4

1/11

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