廬
REG1117
REG1117A
800mA and 1A Low Dropout Positive Regulator
2.85V, 3V, 3.3V, 5V, and Adjustable
FEATURES
q
2.85V, 3V, 3.3V, 5V, and ADJUSTABLE
VERSIONS
q
2.85V MODEL FOR SCSI-2 ACTIVE
TERMINATION
q
OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
q
OUTPUT TOLERANCE:
鹵
1% max
q
DROPOUT VOLTAGE:
REG1117: 1.2V max at I
O
= 800mA
REG1117A: 1.3V max at I
O
= 1A
q
INTERNAL CURRENT LIMIT
q
THERMAL OVERLOAD PROTECTION
q
SOT-223 SURFACE MOUNT PACKAGE
APPLICATIONS
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SCSI-2 ACTIVE TERMINATION
q
HAND-HELD DATA COLLECTION DEVICES
q
HIGH EFFICIENCY LINEAR REGULATORS
q
5V LINEAR REGULATORS
q
BATTERY POWERED INSTRUMENTATION
q
BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
DROPOUT VOLTAGE (V
IN
鈥?V
OUT
)
1.6
1.4
Dropout Voltage (V)
DESCRIPTION
The REG1117 is a family of three-terminal volt-
age regulators capable of up to 800mA output.
Fixed output models include 2.85V, 3V, 3.3V
and 5V versions. The REG1117A provides 1A
of output current in an adjustable version. Output
voltage of the adjustable versions is set with two
external resistors. The REG1117鈥檚 low dropout
voltage allows its use with as little as 1V input-
output voltage differential.
Laser trimming assures excellent output voltage
accuracy without adjustment. An NPN output
stage allows output stage drive to contribute to
the load current for maximum efficiency.
REG1117 and REG1117A are packaged in an
SOT-223 surface-mount package, suitable for
reflow soldering techniques.
Max, T
J
= 0擄C to 125擄C
1.2
1.0
0.8
0.6
0.4
0
100
200 300 400 500
600 700 800
900 1000
Output Current (mA)
Typical, T
J
= 25擄C
Max,
T
J
= 25擄C
= Test Points, REG1117A only
= Test Points, REG1117 and REG1117A
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111
Internet: http://www.burr-brown.com/ 鈥?FAXLine: (800) 548-6133 (US/Canada Only) 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
漏
1992 Burr-Brown Corporation
PDS-1162E
Printed in U.S.A. November, 1996
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