ADM663AAR Analog Devices, ADM663AAR Datasheet

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ADM663AAR

Manufacturer Part Number
ADM663AAR
Description
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
The ADM663A/ADM666A are precision linear voltage regula-
tors featuring a maximum quiescent current of 9 A. 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 V
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.
*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.
FEATURES
Tri-Mode Operation
Low Power CMOS: 9 A max Quiescent Current
High Current 100 mA Output
Low Dropout Voltage
Upgrade for ADM663/ADM666
“Small” 0.1 F 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
3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable
SET
input. The low quiescent cur-
Micropower Linear Voltage Regulators
Tri-Mode: +3.3 V, +5 V, Adjustable
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
SHDN
SHDN
GND
GND
V
V
IN
IN
FUNCTIONAL BLOCK DIAGRAMS
ADM663A/ADM666A*
A1
A1
R3
R3
R1
R2
R1
R2
1.3V
1.3 V
O
O
D
E
C
D
E
R
D
E
C
D
E
R
0.9V
1.3V
ADM666A
ADM663A
C2
C3
C2
C3
A2
C4
C1
C1
50mV
50mV
V
V
IN
IN
–50mV
–50mV
0.5V
0.5V
Fax: 617/326-8703
V
V
V
V
V
V
LBI
LBO
SENSE
SENSE
OUT2
OUT1
OUT
SET
TC
SET

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ADM663AAR Summary of contents

Page 1

... 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 ...

Page 2

ADM663A/ADM666A–SPECIFICATIONS Parameter Input Voltage Quiescent Current Output Voltage, V (+5 V Mode) OUT(2) Output Voltage, V (+3.3 V Mode) OUT(2) Dropout Voltage Dropout Voltage Line Regulation ( OUT(2) ...

Page 3

... Scale) GND 4 5 ORDERING GUIDE Temperature Model Range ADM663AAN – +85 C ADM663AAR – +85 C ADM666AAN – +85 C ADM666AAR – +85 C REV. 0 TERMINOLOGY Dropout Voltage: The input/output voltage differential at which the regulator no longer maintains regulation against fur- ther reductions in input voltage ...

Page 4

ADM663A/ADM666A GENERAL INFORMATION The ADM663A/ADM666A contains a micropower bandgap reference voltage source; an error amplifier, A1; three compara- tors, C1, C2, C3, and a series pass output transistor. A P-chan- nel FET and an NPN transistor are used on the ...

Page 5

The resistor values may be selected by first choosing a value for R1 and then selecting R2 according to the following equation: V OUT R2 R1 1.30 The input leakage current maximum. This al- SET ...

Page 6

ADM663A/ADM666A Temperature Proportional Output The ADM663A contains a V output with a positive tempera- TC ture coefficient of +2.5 mV/ C. This may be connected to the summing junction of the error amplifier (V tor resulting in a negative temperature ...

Page 7

C. The resistor value is calculated 4/0 resistor power rating of 400 mW or greater may be used. Bypass Capacitors The high frequency performance of the ADM663A/ADM666A may be improved by decoupling ...

Page 8

ADM663A/ADM666A 0.160 (4.06) 0.115 (2.93) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Pin Plastic DIP (N- 0.280 (7.11) PIN 1 0.240 (6.10 0.325 (8.25) 0.430 (10.92) 0.300 (7.62) 0.348 (8.84) 0.060 (1.52) 0.210 0.015 (0.38) ...

Page 9

... ORDERING GUIDE Temperature Model Range ADM663AAN – +85 C ADM663AAR – +85 C ADM666AAN – +85 C ADM666AAR – +85 C *For outline information see Package Information section. REV. 0 Package Option* N-8 R-8 N-8 R-8 –9– ADM663A/ADM666A ...

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