lt1106cf Linear Technology Corporation, lt1106cf Datasheet

lt1106cf

Manufacturer Part Number

lt1106cf

Description

Micropower Step-up Dc/dc Converter For Pcmcia Card Flash Memory

Manufacturer

Linear Technology Corporation

Datasheet

1.LT1106CF.pdf (8 pages)

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Quantity

Price

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Bonase Electronics (HK) Co., Limited

Part Number:

LT1106CF

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LT1106CF

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FEATURE

TYPICAL

Contact Linear Technology for Potential Replacement

PPLICATI

60mA Output Current at 12V from 3V Supply

Shutdown to 10µA

Programmable 12V or 5V Output

Up to 85% Efficiency

Quiescent Current: 750µA

Low V

Uses Low Value, Thin, Surface Mount Inductors

Ultra-Thin 20-Lead TSSOP Package

PCMCIA Card Flash Memory VPP Generator

Portable Computers

Portable Instruments

DC/DC Converter Module Replacements

3.3V/5V

FOR INFORMATION PURPOSES ONLY

VPP1

VPP2

DALE ILS-3825-01 OR

COILTRONICS CTX02-11238-3

MOTOROLA MBR0530

CESAT

0.1µF

4.7µF

TANT

ALUM

Switch: 300mV at 0.5A Typical

12V, 60mA Flash Memory Programming Supply

OBSOLETE:

POWER ON

PPLICATI

BSS84

0.1µF

VPP1

VPP2

ON/OFF

PGND

LT1106

10µH

GND

SOFT START

L1*

3/5 DETECT

VPP VALID

AVPP

12/5

D1**

0.1µF

LT1106 • TA01

1µF

470pF

PCMCIA Card Flash Memory

The LT

designed for use on Type I and Type II PCMCIA cards. The

device senses the VPP1 and VPP2 lines at the PCMCIA

socket and generates a regulated 12V, 60mA program-

ming supply if the socket does not provide it. Internal logic

simplifies the interface to PCMCIA card microcontrollers.

One input selects a 12V or 5V regulated output, while

another input controls micropower shutdown. Two logic

outputs indicate when the selected programming voltage

is valid and whether the input supply is 3.3V or 5V.

The regulator features Burst Mode

300mV switch for efficiency up to 85%. High frequency

500kHz switching permits the use of small value, flat

inductors that fit neatly on PCMCIA cards. The device

requires just 1µF of output capacitance.

Quiescent current is 750µA which drops to 350µA when

the card runs off the socket supply. The shutdown pin

reduces supply current to only 10µA. The device includes

a soft start feature which limits supply current transients

when the card is inserted into a hot socket.

Burst Mode is a trademark of Linear Technology Corporation.

, LTC and LT are registered trademarks of Linear Technology Corporation.

12V/60mA

VPP VALID

3/5

ESCRIPTIO

1106 is the industry’s first DC/DC converter

DC/DC Converter for

Micropower Step-Up

D1 = MBR0530

D1 = 4 BAT54Cs

IN PARALLEL

12V Output Efficiency

LOAD CURRENT (mA)

operation with a 0.5A,

= 5V

LT1106

= 3.3V

LT1106 • TA02

100

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