E-L6920D datasheet(1/13 Pages) STMICROELECTRONICS

Part #	E-L6920D

Description	1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER

PDF	13 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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L6920

February 2005

1

Features

■ 0.6 TO 5.5V OPERATING INPUT VOLTAGE

■ 1V START UP INPUT VOLTAGE

■ INTERNAL SYNCHRONOUS RECTIFIER

■ ZERO SHUT DOWN CURRENT

■ 3.3V AND 5V FIXED OR ADJUSTABLE

OUTPUT VOLTAGE (2V UP TO 5.2V)

■ 120m

Ω INTERNAL ACTIVE SWITCH

■ LOW BATTERY VOLTAGE DETECTION

■ REVERSE BATTERY PROTECTION

1.1 Applications

■ ONE TO THREE CELL BATTERY DEVICES

■ PDA AND HAND HELD INSTRUMENTS

■ CELLULAR PHONES - DIGITAL CORDLESS

PHONE

■ PAGERS

■ GPS

■ DIGITAL CAMERAS

2

Description

The L6920 is a high efficiency step-up controller re-

quiring only three external components to realize the

conversion from the battery voltage to the selected

output voltage.

The start up is guaranteed at 1V and the device is op-

erating down to 0.6V.

Internal synchronous rectifier is implemented with a

120m

Ω P-channel MOSFET and, in order to improve

the efficiency, a variable frequency control is imple-

mented.

1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER

Figure 1. Application Circuit

L1

LX

8

OUT

1

FB

3

6

LBO

GND

SHDN

7

5

LBI

2

REF

4

VCC

VOUT

2.5V

3.3V

500mA

L6920D

C2

C3

C1

Figure 1. Package

Table 1. Order Codes

Part Number

Package

L6920D

TSSOP8 Tube

L6920DTR

Tape & Reel

TSSOP8

Rev. 2

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E-L6920D Datasheet(PDF) 1 Page - STMicroelectronics

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