LT1529CQTR

Manufacturer Part NumberLT1529CQTR
ManufacturerLinear Technology Corporation
LT1529CQTR datasheet
 

Specifications of LT1529CQTR

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FEATURES
Dropout Voltage: 0.6V at I
= 3A
OUT
Output Current: 3A
Quiescent Current: 50µA
No Protection Diodes Needed
Adjustable Output from 3.8V to 14V
3.3V and 5V Fixed Output Voltages
Controlled Quiescent Current in Dropout
Shutdown I
= 16µA
Q
Stable with 22µF Output Capacitor
Reverse Battery Protection
No Reverse Current
Thermal Limiting
U
APPLICATIO S
High Efficiency Regulator
Regulator for Battery-Powered Systems
Post Regulator for Switching Supplies
5V to 3.3V Logic Regulator
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
5V Supply with Shutdown
5
1
V
OUTPUT
IN
LT1529-5
V
> 5.5V
IN
4
2
SHDN
SENSE
GND
3
V
(PIN 4)
OUTPUT
SHDN
< 0.25
OFF
> 2.8
ON
NC
ON
3A Low Dropout Regulators
DESCRIPTIO
®
The LT
1529/LT1529-3.3/LT1529-5 are 3A low dropout
regulators with micropower quiescent current and shut-
down. The devices are capable of supplying 3A of output
current with a dropout voltage of 0.6V. Designed for use
in battery-powered systems, the low quiescent current,
50µA operating and 16µA in shutdown, make 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 LT1529 /LT1529-3.3/LT1529-5 in-
clude the ability to operate with small output capacitors.
They are stable with 22µF on the output while most older
devices require up to 100µF for stability. Small ceramic
capacitors can be used, enhancing manufacturabiltiy.
Also the input may be connected to voltages lower than the
output voltage, including negative voltages, without re-
verse current flow from output to input. This makes the
LT1529/LT1529-3.3/LT1529-5 ideal for backup power
situations where the output is held high and the input is at
ground or reversed. Under these conditions, only 16µA
will flow from the OUTPUT pin to ground. The devices are
available in 5-lead TO-220 and 5-lead DD packages.
0.6
0.5
5V
+
3A
0.4
22µF
0.3
0.2
0.1
0
LT1529 • TA01
LT1529
LT1529-3.3/LT1529-5
with Micropower
Quiescent Current
and Shutdown
U
Dropout Voltage
0
1.0
1.5
2.0
2.5
3.0
0.5
OUTPUT CURRENT (A)
LT1529 • TA02
152935fb
1