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B1117 Datasheet

Low Dropout Voltage Regulator

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Bay Linear
Inspire the Linear Power
1.0Amp Low Dropout Voltage Regulator
Adjustable & Fix (0.40Volt Dropout)
B1117
Description
The Bay Linear B1117 is a three terminal positive NPN
regulator offered as adjustable or fix voltages of 1.5V,1.8V,
2.5V, 2.85V, 3.3V, and 5Volts. The output current has a
capability up to 1.0Amp,. This device has been optimized for
low voltage where transient response and minimum input
voltage are critical. The 2.85V version is designed specifically
to be used in active terminators for SCSI bus.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-Chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
The B1117 is offered in a 3-pin SOT-223, and TO-252
(DPAK) packages compatible with other 3 terminal regulators.
5-pin version in TO-263 with lower dropout of 0.4 volt is
available.
Features
Adjustable Output Down to 1.2V
Output Current of 1.0Amp
Low Dropout 1.0V for B1117
Dropout of 0.40 V in for B1117A
Adjustable & Fix 1.5V, 1.8V, 2.5V, 2.85V,
3.0V, 3.3V, 5.0V
0.05% Load Regulation
Current & Thermal Limiting
Lower Cost SOT-89 Package
Available in SOT-223, and TO-252,
TO-263 & SO-8
Similar to industry Standard LT1117
Applications
Active SCSI terminators
High efficiency Linear Regulator
Post regulators fro Switching Supplies
Battery Charger
5V to 3.3V linear Regulators
Motherboard Clock Supplies
Pin Connection
8-Pin Surface Mount
ADJ 1
8 IN
NC 2
7 IN
OUT
3
6 IN
OUT
4
5 N.C.
Top View
SOT-223
Tab VOUT
Adj/GND OUT IN
Front View
Ordering Information
Devices
B1117D-X
B1117N-X
B1117T-X
B1117S-X
B1117M-X
Package
TO-252
TO-223
TO-220
TO-263
SO-8
Temp.
0 °C to 125 °C
0 °C to 125 °C
0 °C to 125 °C
0 °C to 125 °C
0 °C to 125 °C
SOT -223-5
Tab V OUT
1234 5
Front View
#1 Sense
#2 Adj/GND
#3 OUT
#4 Control
#5 VIN
TO-252
1 23
ADJ/GN VOUT VIN
Front
5 VPOWER
4 VCONTROL
3 OUTPUT
2 ADJ/GND.
1 SENSE
TO-263-5 Package
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
Bay Linear
Bay Linear



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