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Linear Technology Electronic Components Datasheet

LT1529-3.3 Datasheet

3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown

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FEATURES
s Dropout Voltage: 0.6V at IOUT = 3A
s Output Current: 3A
s Quiescent Current: 50µA
s No Protection Diodes Needed
s Adjustable Output from 3.8V to 14V
s 3.3V and 5V Fixed Output Voltages
s Controlled Quiescent Current in Dropout
s Shutdown IQ = 16µA
s Stable with 3.3µF Output Capacitor
s Reverse Battery Protection
s No Reverse Current
s Thermal Limiting
U
APPLICATIO S
s High Efficiency Regulator
s Regulator for Battery-Powered Systems
s Post Regulator for Switching Supplies
s 5V to 3.3V Logic Regulator
TYPICAL APPLICATIO
5V Supply with Shutdown
VIN > 5.5V
51
VIN OUTPUT
LT1529-5
42
SHDN SENSE
GND
3
5V
+ 3.3µF 3A
SOLID
TANT
VSHDN (PIN 4)
< 0.25
> 2.8
NC
OUTPUT
OFF
ON
ON
LT1529 • TA01
LT1529
LT 1529-3.3/LT 1529-5
3A Low Dropout Regulators
with Micropower
Quiescent Current
and Shutdown
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 only 3.3µF on the output while most
older devices require between 10µF and 100µF for stabil-
ity. 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 reverse 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Dropout Voltage
0.6
0.5
0.4
0.3
0.2
0.1
0
0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
LT1529 • TA02
1


Linear Technology Electronic Components Datasheet

LT1529-3.3 Datasheet

3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown

No Preview Available !

LT1529
LT 1529-3.3/LT 1529-5
ABSOLUTE AXI U RATI GS (Note 1)
Input Voltage ...................................................... ±15V*
OUTPUT Pin Reverse Current .............................. 10mA
SENSE Pin Current .............................................. 10mA
ADJ Pin Current ................................................... 10mA
SHDN Pin Input Voltage (Note 2) .............. 6.5V, – 0.6V
SHDN Pin Input Current (Note 2) .......................... 5mA
Output Short-Circuit Duration ......................... Indefinite
Storage Temperature Range ................ – 65°C to 150°C
Operating Junction Temperature Range
Commercial .......................................... 0°C to 125°C
Industrial ......................................... – 45°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
*For applications requiring input voltage ratings greater than 15V, contact
the factory.
PACKAGE/ORDER I FOR ATIO
TAB IS
GND
FRONT VIEW
5
4
3
2
1
VIN
SHDN
GND
SENSE/ADJ*
OUTPUT
Q PACKAGE
5-LEAD PLASTIC DD PAK
*PIN 2 = SENSE FOR LT1529-3.3/LT1529-5
= ADJ FOR LT1529
TJMAX = 125°C, θJA 30°C/ W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1529CQ
LT1529CQ-3.3
LT1529CQ-5
LT1529IQ
LT1529IQ-3.3
LT1529IQ-5
TAB IS
GND
FRONT VIEW
5
4
3
2
1
VIN
SHDN
GND
SENSE/ADJ*
OUTPUT
T PACKAGE
5-LEAD PLASTIC TO-220
*PIN 2 = SENSE FOR LT1529-3.3/LT1529-5
= ADJ FOR LT1529
TJMAX = 125°C, θJA 50°C/ W
ORDER PART
NUMBER
LT1529CT
LT1529CT-3.3
LT1529CT-5
LT1529IT
LT1529IT-3.3
LT1529IT-5
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the operating temperature range, otherwise specificatons are at TA = 25°C. (Note 3)
PARAMETER
Regulated Output Voltage
(Note 4)
Line Regulation
Load Regulation
Dropout Voltage
(Note 6)
CONDITIONS
LT1529-3.3
VIN = 3.8V, IOUT = 1mA, TJ = 25°C
4.3V < VIN < 15V, 1mA < IOUT < 3A
LT1529-5
VIN = 5.5V, IOUT = 1mA, TJ = 25°C
6V < VIN < 15V, 1mA < IOUT < 3A
LT1529 (Note 5)
VIN = 4.3V, IOUT = 1mA, TJ = 25°C
4.8V < VIN < 15V, 1mA < IOUT < 3A
LT1529-3.3
VIN = 3.8V to 15V, IOUT = 1mA
LT1529-5
VIN = 5.5V to 15V, IOUT = 1mA
LT1529 (Note 5) VIN = 4.3V to 15V, IOUT = 1mA
LT1529-3.3
ILOAD = 1mA to 3A, VIN = 4.3V, TJ = 25°C
ILOAD = 1mA to 3A, VIN = 4.3V
LT1529-5
ILOAD = 1mA to 3A, VIN = 6V, TJ = 25°C
ILOAD = 1mA to 3A, VIN = 6V
LT1529 (Note 5)
ILOAD = 1mA to 3A, VIN = 4.8V, TJ = 25°C
ILOAD = 1mA to 3A, VIN = 4.8V
ILOAD = 10mA, TJ = 25°C
ILOAD = 10mA
ILOAD = 100mA, TJ = 25°C
ILOAD = 100mA
MIN TYP MAX
3.250 3.300 3.350
q 3.200 3.300 3.400
4.925 5.000 5.075
q 4.850 5.000 5.150
3.695 3.750 3.805
q 3.640 3.750 3.860
q 1.5 10
q 1.5 10
q 1.5 10
5 20
q 12 30
5 20
q 12 30
5 20
q 12 30
110 180
q 250
200 300
q 400
UNITS
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
2


Part Number LT1529-3.3
Description 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown
Maker Linear Technology
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Linear Technology





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