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LT1528CT

Description
LDO Regulator Pos 3.3V 3A 5-Pin(5+Tab) TO-220 Tube
CategoryPower/power management    The power supply circuit   
File Size164KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric Compare View All

LT1528CT Overview

LDO Regulator Pos 3.3V 3A 5-Pin(5+Tab) TO-220 Tube

LT1528CT Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
TypeLDO
Number of Outputs1
PolarityPositive
Output TypeFixed
Output Voltage (V)3.3
Maximum Output Current (A)3
Minimum Input Voltage (V)3.9
Maximum Input Voltage (V)15
Maximum Dropout Voltage @ Current (V)0.45@1500mA|0.32@700mA|0.2@100mA|0.67@3A|0.11@10mA
Line Regulation1mV
Load Regulation20mV
Special FeaturesReverse Battery Protection|Shutdown|Thermal Protection
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)125
Supplier Temperature GradeCommercial
PackagingTube
Supplier PackageTO-220
Pin Count5
Standard Package NameTO-220
MountingThrough Hole
Package Height9.4(Max)
Package Length10.54(Max)
Package Width4.57(Max)
PCB changed5
TabTab
Lead ShapeFormed
LT1528
3A Low Dropout Regulator
for Microprocessor Applications
FEATURES
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DESCRIPTION
The LT
®
1528 is a 3A low dropout regulator optimized to
handle the large load current transients associated with
the current generation of microprocessors. This device has
the fastest transient response of currently available PNP
regulators and is very tolerant of variations in capacitor
ESR. Dropout voltage is 75mV at 10mA, rising to 300mV
at 1A and 600mV at 3A. The device has a quiescent cur-
rent of 400μA. Quiescent current is well controlled; it does
not increase significantly as the device enters dropout.
The regulator can operate with output capacitors as small
as 3.3μF, although larger capacitors will be needed to
achieve the performance required in most microprocessor
applications. The LT1528 is available with a fixed output
voltage of 3.3V. An external SENSE pin allows adjustment
to output voltages greater than 3.3V, using a simple resis-
tive divider. This allows the device to be adjusted over a
wide range of output voltages, including the 3.3V to 4.2V
range required by a variety of processors from Intel, IBM,
AMD, and Cyrix.
The LT1528 has both reverse input and reverse output
protection and includes a shutdown feature. Quiescent
current drops to 125μA in shutdown. The LT1528 is avail-
able in 5-lead TO-220 and 5-lead DD-PAK packages.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Dropout Voltage: 0.6V at I
OUT
= 3A
Fast Transient Response
Output Current: 3A
Quiescent Current: 400μA
No Protection Diodes Needed
Fixed Output Voltage: 3.3V
Controlled Quiescent Current in Dropout
Shutdown I
Q
= 125μA
Stable with 3.3μF Output Capacitor
Reverse Battery Protection
No Reverse Output Current
Thermal Limiting
APPLICATIONS
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n
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Microprocessor Applications
Post Regulator for Switching Supplies
5V to 3.3V Logic Regulator
TYPICAL APPLICATION
Microprocessor Supply with Shutdown
0.6
5
IN
LT1528
4
SHDN
GND
3
330Ω
SENSE
2
J1
J2
J3
OUT
1
15Ω
68Ω
V
OUT
Dropout Voltage
+
DROPOUT VOLTAGE (V)
V
IN
=5V
4
×
47μF*
SOLID TANTALUM
0.5
0.4
0.3
0.2
0.1
0
V
SHDN
(PIN 4)
<0.25
>2.80
NC
OUTPUT
OFF
ON
ON
SHORTING
J1
J2
J3
V
OUT
3.30
3.45
4.00
*CHOOSE CAPACITORS
TO MEET PROCESSOR
REQUIREMENTS
1528 TA01
0
0.5
2.5
1.0
1.5
2.0
OUTPUT CURRENT (mA)
3.0
1528 TA02
1528fb
1

LT1528CT Related Products

LT1528CT LT1528CQ#PBF LT1528CQ#TRPBF LT1528CQ LT1528CT#06PBF LT1528CT#PBF
Description LDO Regulator Pos 3.3V 3A 5-Pin(5+Tab) TO-220 Tube LDO Regulator Pos 3.3V 3A 6-Pin(5+Tab) DDPAK Tube LDO Regulator Pos 3.3V 3A 6-Pin(5+Tab) DDPAK T/R LDO Regulator Pos 3.3V 3A 6-Pin(5+Tab) DDPAK LDO Regulator Pos 3.3V 3A 5-Pin(5+Tab) TO-220 LDO Regulator Pos 3.3V 3A 5-Pin(5+Tab) TO-220 Tube
EU restricts the use of certain hazardous substances Not Compliant Compliant with Exemption Compliant with Exemption Not Compliant Compliant with Exemption Compliant with Exemption
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed Active Active Unconfirmed Unconfirmed Active
SVHC Yes Yes Yes Yes Yes Yes
SVHC Exceeds Threshold Yes Yes Yes Yes Yes Yes
Type LDO LDO LDO LDO LDO LDO
Number of Outputs 1 1 1 1 1 1
Polarity Positive Positive Positive Positive Positive Positive
Output Type Fixed Fixed Fixed Fixed Fixed Fixed
Output Voltage (V) 3.3 3.3 3.3 3.3 3.3 3.3
Maximum Output Current (A) 3 3 3 3 3 3
Minimum Input Voltage (V) 3.9 3.9 3.9 3.9 3.9 3.9
Maximum Input Voltage (V) 15 15 15 15 15 15
Maximum Dropout Voltage @ Current (V) 0.45@1500mA|0.32@700mA|0.2@100mA|0.67@3A|0.11@10mA 0.11@10mA|0.67@3A|0.2@100mA|0.32@700mA|0.45@1500mA 0.11@10mA|0.67@3A|0.2@100mA|0.32@700mA|0.45@1500mA 0.32@700mA|0.45@1500mA|0.67@3A|0.2@100mA|0.11@10mA 0.11@10mA|0.67@3A|0.2@100mA|0.32@700mA|0.45@1500mA 0.11@10mA|0.67@3A|0.2@100mA|0.32@700mA|0.45@1500mA
Line Regulation 1mV 1mV 1mV 1mV 1mV 1mV
Load Regulation 20mV 20mV 20mV 20mV 20mV 20mV
Special Features Reverse Battery Protection|Shutdown|Thermal Protection Reverse Battery Protection|Shutdown|Thermal Protection Reverse Battery Protection|Shutdown|Thermal Protection Thermal Protection|Reverse Battery Protection|Shutdown Reverse Battery Protection|Shutdown|Thermal Protection Reverse Battery Protection|Shutdown|Thermal Protection
Maximum Operating Temperature (°C) 125 125 125 125 125 125
Supplier Temperature Grade Commercial Commercial Commercial Commercial Commercial Commercial
Supplier Package TO-220 DDPAK DDPAK DDPAK TO-220 TO-220
Pin Count 5 6 6 6 5 5
Mounting Through Hole Surface Mount Surface Mount Surface Mount Through Hole Through Hole
Package Height 9.4(Max) 4.57(Max) 4.57(Max) 4.57(Max) 9.4(Max) 9.4(Max)
Package Length 10.54(Max) 10.54(Max) 10.54(Max) 10.54(Max) 10.54(Max) 10.54(Max)
Package Width 4.57(Max) 9.4(Max) 9.4(Max) 9.4(Max) 4.57(Max) 4.57(Max)
PCB changed 5 5 5 5 5 5
Tab Tab Tab Tab Tab Tab Tab
Lead Shape Formed Gull-wing Gull-wing Gull-wing Formed Through Hole
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 - - 8542.39.00.01
Packaging Tube Tube Tape and Reel - - Tube
Standard Package Name TO-220 TO-263 TO-263 TO-263 - TO-220
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