ADP1108 Analog Devices, ADP1108 Datasheet

ADP1108

Manufacturer Part Number

ADP1108

Description

Micropower DC-DC Converter Adjustable and Fixed 3.3 V/ 5 V/ 12 V

Manufacturer

Analog Devices

Datasheet

1.ADP1108.pdf (12 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ADP1108AR-5

Manufacturer:

ADI/亚德诺

Quantity:

20 000

Current page: 1 of 12
Download datasheet (235Kb)

GENERAL DESCRIPTION

The ADP1108 is a highly versatile micropower switch-mode

dc-dc converter that operates from an input voltage supply as

low as 2.0 V and typically starts up from 1.8 V.

The ADP1108 can be programmed into a step-up or step-down

dc-to-dc converter with only three external components. The

fixed outputs are 3.3 V, 5 V and 12 V. An adjustable version is

also available. In step-up mode, supply voltage range is 2.0 V to

12 V, and 30 V in step-down mode. The ADP1108 can deliver

150 mA at 5 V from a 2 AA cell input and 300 mA at 5 V from

a 9 V input in step-down mode. Switch current limit can be

programmed with a single resistor.

For battery operated and power conscious applications, the

ADP1108 offers a very low power consumption of less than

110 A.

The auxiliary gain block available in ADP1108 can be used

as a low battery detector, linear post regulator, under voltage

lockout circuit or error amplifier.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Operates at Supply Voltages From 2.0 V to 30 V

Consumes Only 110 A Supply Current

Step-Up or Step-Down Mode Operation

Minimum External Components Required

Low Battery Detector Comparator On-Chip

User-Adjustable Current Limit

Internal 1 A Power Switch

Fixed or Adjustable Output Voltage Versions

8-Pin DIP or SO-8 Package

APPLICATIONS

Notebook/Palm Top Computers

3 V to 5 V, 5 V to 12 V Converters

9 V to 5 V, 12 V to 5 V Converters

LCD Bias Generators

Peripherals and Add-On Cards

Battery Backup Supplies

Cellular Telephones

Portable Instruments

Adjustable and Fixed 3.3 V, 5 V, 12 V

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

Tel: 617/329-4700

Fax: 617/326-8703

Micropower DC-DC Converter

REFERENCE

1.245V

GND

FUNCTIONAL BLOCK DIAGRAMS

SET

753k

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

COMPARATOR

GAIN BLOCK/

ERROR AMP

GAIN BLOCK/

ERROR AMP

SENSE

OSCILLATOR

ADP1108-3.3: R1 = 456k

ADP1108-5: R1 = 250k

ADP1108-12: R1 = 87.4k

ADP1108-3.3

ADP1108-5

ADP1108-12

ADP1108

DRIVER

SW2

SW1

SW2

SW1

LIM

Related parts for ADP1108

Related keywords

ADP1108 datasheet
ADP1108 data sheet
ADP1108 pdf datasheet
ADP1108 component
ADP1108 part
ADP1108 distributor
ADP1108 RoHS
ADP1108 datasheet download