UC282-2 Datasheet PDF


Part Number

UC282-2

Description

Fast LDO Linear Regulator

Manufacture

etcTI

Total Page 17 Pages
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UC282-2 Datasheet
ą UC282Ć1, UC282Ć2, UC282Ć3, UC282ĆADJ, UC382Ć1, UC382Ć2, UC382Ć3, UC382ĆADJ
FAST LDO LINEAR REGULATOR
D Fast Transient Response
D 10-mA to 3-A Load Current
D Short Circuit Protection
D Maximum Dropout of 450-mV at 3-A Load
Current
D Separate Bias and VIN Pins
D Available in Adjustable or Fixed-Output
Voltages
D 5-Pin Package Allows Kelvin Sensing of
Load Voltage
D Reverse Current Protection
SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004
5-PIN TO-220
T PACKAGE (TOP VIEW)
5-PIN TO-263
TD PACKAGE
(TOP VIEW)
description
Note: Tab = Ground
The UC382 is a low-dropout-linear regulator providing a quick response to fast load changes. Combined with
its precision onboard reference, the UC382 excels at driving GTL and BTL buses. Due to its fast response to
load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased
when compared to standard LDO linear regulators.
Dropout voltage (VIN to VOUT) is only 450 mV maximum at 100°C and 350 mV typical at 3-A load.
The onboard bandgap reference is stable with temperature and scaled for a 1.2-V input to the internal-power
amplifier. The UC382 is available in fixed-output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the
adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage
defaults to 1.2 V.
block diagram
VB
1
THERMAL
SHUTDOWN
1.2 V
BANDGAP
REFERENCE
+
UC382−ADJ
UC382−1 (1.5 V)
UC382−2 (2.1 V)
UC382−3 (2.5 V)
R1
OPEN
2k
2k
2k
R2
0
500
1.5 k
2.16 k
2 VIN
R1 R2
SHORT
CIRCUIT
SENSE
35
4
GND
ADJ
VOUT
UDG-00080
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 2000−2004, Texas Instruments Incorporated
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