LT1585A Datasheet, PDF (1/9 Pages) ON Semiconductor – 5A LOW DROPOUT FAST RESPONSE POSITIVE ADJUSTABLE AND FIXED VOLTAGE REGULATOR

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5A Low Dropout Fast Response
Positive Adjustable and Fixed
Voltage Regulators
The LT1585A is a low dropout 3–terminal voltage regulator with 5A output
current capability.
Design has been optimized for low voltage applications where transient
response and minimum input voltage are critical. This voltage regulator
features a low dropout voltage and fast transient response. These
improvements make them ideal for low voltage microprocessor applications
requiring a regulated 2.5V to 3.6V output with an input supply below 7V.
Current limits is trimmed to ensure specified output current and controlled
short–circuit current. On–chip thermal limiting provides protection against
any combination of overload that would create excessive junction
temperatures. The LT1585A is available in the industry standard 3–pin
TO–220 and D2PAK power package.
Features
• Fast Transient Response
• Guaranteed Dropout Voltage at Multiple Currents
• Load Regulation: 0.05% Typ
• Trimmed Current Limit
• On–Chip Thermal Limiting
• Standard 3–Pin Power Package
Applications
• Pentium^® Processor Supplies
• Power PC™ Supplies
• Other 2.5V to 3.6V Microprocessor Supplies
• Low Voltage Logic Supplies
• Battery–Powered Circuitry
• Post Regulator for Switching Supply
LT1585A
5A LOW DROPOUT FAST
RESPONSE POSITIVE
ADJUSTABLE AND FIXED
VOLTAGE REGULATOR
SILICON MONOLITHIC
INTEGRATED CIRCUIT
1
2
3
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Adjustable output:
Pin 1. Adjust
Pin 2. Vout
Pin 3. Vin
Fixed 1.5V output:
Pin 1. Gnd
Pin 2. Vout
Pin 3. Vin
Simplified Block Diagram
Vin
+
–
12
3
CM SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Thermal
Limit
Adjust
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Tested
Operating
Temp.
Range
Output
Voltage
Type
Package
LT1585ACT
0 to 125°C ADJ. TO–220
LT1585ACM
0 to 125°C ADJ. D2PAK
Vout
LT1585ACT–1.5 0 to 125°C ^FIXED TO–220
1.5V
LT1585ACM–1.5 0 to 125°C ^FIXED D2PAK
1.5V
© Motorola, Inc. 1999
Rev 0
1