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LT1521CST-3#PBF

Description
IC REG LINEAR 3V 300MA SOT223-3
CategoryPower/power management    The power supply circuit   
File Size198KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LT1521CST-3#PBF Overview

IC REG LINEAR 3V 300MA SOT223-3

LT1521CST-3#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSOT
package instructionPLASTIC, SOT-223, 4 PIN
Contacts3
Manufacturer packaging codeST
Reach Compliance Codenot_compliant
ECCN codeEAR99
AdjustabilityFIXED
Maximum drop-back voltage 10.75 V
Nominal dropback voltage 10.5 V
Maximum absolute input voltage20 V
Maximum input voltage20 V
Minimum input voltage4 V
JESD-30 codeR-PDSO-G4
JESD-609 codee3
length6.505 mm
Maximum grid adjustment rate0.02%
Maximum load regulation0.055%
Humidity sensitivity level1
Number of functions1
Output times1
Number of terminals4
Working temperatureTJ-Max125 °C
Working temperature TJ-Min
Maximum output current 10.3 A
Maximum output voltage 13.1 V
Minimum output voltage 12.9 V
Nominal output voltage 13 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOT-223
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Regulator typeFIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Maximum seat height1.8 mm
surface mountYES
technologyBIPOLAR
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch2.3 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
Maximum voltage tolerance3.3%
width3.505 mm
LT1521/LT1521-3
LT1521-3.3/LT1521-5
300mA Low Dropout
Regulators with Micropower
Quiescent Current and Shutdown
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Dropout Voltage: 0.5V
Output Current: 300mA
Quiescent Current: 12
µ
A
No Protection Diodes Needed
Adjustable Output from 3.8V to 20V
Fixed Output Voltages: 3V, 3.3V, 5V
Controlled Quiescent Current in Dropout
Shutdown I
Q
= 6µA
Reverse Battery Protection
No Reverse Current
Thermal Limiting
The LT
®
1521/LT1521-3/LT1521-3.3/LT1521-5 are low
dropout regulators with micropower quiescent current
and shutdown. These devices are capable of supplying
300mA of output current with a dropout voltage of 0.5V.
Designed for use in battery-powered systems, the low
quiescent current, 12µA operating and 6µA in
shutdown, makes them an ideal choice. The quiescent
current is well controlled; it does not rise in dropout as it
does with many other low dropout PNP regulators.
Other features of the LT1521/LT1521-3/LT1521-3.3/
LT1521-5 include the ability to operate with very small
output capacitors. They are stable with only 1.5µF on the
output while most older devices require between 10µF and
100µF for stability. Small ceramic capacitors can be used,
enhancing manufacturability. Also, the input may be con-
nected to voltages lower than the output voltage, including
negative voltages, without reverse current flow from out-
put to input. This makes the LT1521 series ideal for backup
power situations where the output is held high and the
input is low or reversed. Under these conditions only 5µA
will flow from the output pin to ground.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
Low Current Regulator
Regulator for Battery-Powered Systems
Post Regulator for Switching Supplies
TYPICAL APPLICATIO
8
IN
LT1521-5
5
SHDN
GND
3
5V Battery-Powered Supply with Shutdown
OUT
1
5V
300mA
0.6
0.5
DROPOUT VOLTAGE (V)
+
6V
1µF
1.5µF
2
SENSE
0.4
0.3
0.2
0.1
V
SHDN
(PIN 5) OUTPUT
<0.25
OFF
>2.80
ON
NC
ON
LT1521 • TA01
0
0
50
U
Dropout Voltage
250
100
150
200
OUTPUT CURRENT (mA)
300
LT1521 • TA02
U
U
1521335fb
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