ADP1109AAR datasheet(1/8 Pages) AD

部件名	ADP1109AAR

功能描述	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter

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a

ADP1109A

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

Micropower Low Cost

Fixed 3.3 V, 5 V, 12 V and Adjustable

DC-to-DC Converter

FUNCTIONAL BLOCK DIAGRAM

120kHz

OSCILLATOR

ADP1109A-3.3: R1 = 152k

ADP1109A-5:

R1 = 83k

ADP1109A-12: R1 = 29k

VIN

SENSE

SW

PGND

SHUTDOWN

GND

1.25V

REFERENCE

R2

250k

R1

DRIVER

COMPARATOR

Q1

A1

120kHz

OSCILLATOR

ADP1109A

VIN

FB

SW

PGND

SHUTDOWN

GND

1.25V

REFERENCE

DRIVER

COMPARATOR

Q1

A1

FEATURES

Operates at Supply Voltages 2 V to 9 V

Fixed 3.3 V, 5 V, 12 V and Adjustable Output

Minimum External Components Required

Ground Current: 460

A

Oscillator Frequency: 120 kHz

Logic Shutdown

8-Lead DIP and SO-8 Packages

APPLICATIONS

Cellular Telephones

Single-Cell to 5 V Converters

Laptop and Palmtop Computers

Pagers

Cameras

Battery Backup Supplies

Portable Instruments

Laser Diode Drivers

Hand-Held Inventory Computers

GENERAL DESCRIPTION

The ADP1109A is a versatile step-up switching regulator. The

device requires only minimal external components to operate as

a complete switching regulator.

The ADP1109A-5 can deliver 100 mA at 5 V from a 3 V input

and the ADP1109A-12 can deliver 60 mA at 12 V from a 5 V

input. The device also features a logic controlled shutdown

capability that, when a logic low is applied, will shut down the

oscillator. The 120 kHz operating frequency allows for the use

of small surface mount components.

The gated oscillator capability eliminates the need for frequency

compensation.

TYPICAL APPLICATION

7

8

1

3

4

5

L1

33 H

D1

VOUT

12V

60mA

C1

22 F

16V

SHUTDOWN

PGND

GND

VIN

SW

SENSE

ADP1109A-12

VIN

5V

SHUTDOWN/PROGRAM

+

Flash Memory VPP Generator

类似零件编号 - ADP1109AAR

制造商	部件名	数据表	功能描述
Analog Devices	ADP1109AN	131Kb / 8P	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter REV. 0
	ADP1109AN-12	131Kb / 8P	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter REV. 0
	ADP1109AN-33	131Kb / 8P	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter REV. 0
	ADP1109AN-5	131Kb / 8P	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter REV. 0
	ADP1109AR	131Kb / 8P	Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter REV. 0

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