ADM666AAN データシートの表示（PDF） - Analog Devices

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ADM666AAN

Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators

Analog Devices 

a

Tri-Mode: +3.3 V, +5 V, Adjustable

Micropower Linear Voltage Regulators

ADM663A/ADM666A*

FEATURES

Tri-Mode Operation

3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable

Low Power CMOS: 9 µA max Quiescent Current

High Current 100 mA Output

Low Dropout Voltage

Upgrade for ADM663/ADM666

“Small” 0.1 µF Output Capacitor (0805 Style)

+2 V to +16.5 V Operating Range

Low Battery Detector ADM666A

No Overshoot on Power-Up

Thermal Shutdown

APPLICATIONS

Handheld Instruments

LCD Display Systems

Pagers

Battery Operated Equipment

GENERAL DESCRIPTION

The ADM663A/ADM666A are precision linear voltage regula-

tors featuring a maximum quiescent current of 9 µA. They can

be used to give a fixed +3.3 V or +5 V output with no additional

external components or can be adjusted from 1.3 V to 16 V

using two external resistors. Fixed or adjustable operation is au-

tomatically selected via the VSET input. The low quiescent cur-

rent makes these devices especially suitable for battery powered

systems. The input voltage range is 2 V to 16.5 V, and an out-

put current up to 100 mA is provided. Current limiting may be

set using a single external resistor. For additional safety, an

internal thermal shutdown circuit monitors the internal die

temperature.

The ADM666A features additional low battery monitoring cir-

cuitry to detect for low battery voltages.

The ADM663A/ADM666A are pin compatible enhancements

for the ADM663/ADM666. Improvements include an addi-

tional 3.3 V output range, higher output current, and operation

with a small output capacitor.

The ADM663A/ADM666A are available in an 8-pin DIP and

narrow surface mount (SOIC) packages.

FUNCTIONAL BLOCK DIAGRAMS

VIN

SHDN

GND

VIN

SHDN

GND

1.3V

A1

VOUT2

VOUT1

0.5V

C1

SEN SE

D

E

C2 VIN–50mV

C

O

D

E

C3

VSET

R

50mV

R1

R2

0.9V A2

VTC

R3

ADM663A

1.3 V

A1

VOUT

0.5V

C1

SEN SE

D

E

C2 VIN–50mV

C

O

VSET

D

E

C3

R

50mV

R1

LBI

1.3V C4

R2

LBO

R3

ADM666A

*Patent pending.

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.

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

Tel: 617/329-4700

Fax: 617/326-8703

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