LT1528CT Linear Technology, LT1528CT Datasheet - Page 3

IC LDO REG 3.3V/ADJ 3A TO220-5

LT1528CT

Manufacturer Part Number
LT1528CT
Description
IC LDO REG 3.3V/ADJ 3A TO220-5
Manufacturer
Linear Technology
Datasheet

Specifications of LT1528CT

Regulator Topology
Positive Fixed and Adjustable
Voltage - Output
3.3V, 3.3 ~ 14.15 V
Voltage - Input
3.9 ~ 15 V
Voltage - Dropout (typical)
0.57V @ 3A
Number Of Regulators
1
Current - Output
3A
Current - Limit (min)
3.2A
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The SHDN pin input voltage rating is required for a low
impedance source. Internal protection devices connected to the SHDN
pin will turn on and clamp the pin to approximately 7V or – 0.6V. This
range allows the use of 5V logic devices to drive the pin directly. For
high impedance sources or logic running on supply voltages greater than
5.5V, the maximum current driven into the SHDN pin must be less than
5mA.
Note 3: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specifi cation will not apply
for all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current must be limited.
When operating at maximum output current, the input voltage range
must be limited.
Note 4: The LT1528 is tested and specifi ed with the SENSE pin
connected to the OUTPUT pin.
Note 5: Dropout voltage is the minimum input/output voltage required to
PARAMETER
Dropout Voltage (Note 5)
GND Pin Current (Note 6)
SENSE Pin Current (Notes 4, 8)
SHDN Threshold
SHDN Pin Current (Note 9)
Quiescent Current in Shutdown (Note 10)
Ripple Rejection
Current Limit
Input Reverse Leakage Current
Reverse Output Current (Note 11)
CONDITIONS
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
V
V
V
V
V
f
V
V
V
V
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
RIPPLE
OUT
OUT
SHDN
IN
IN
IN
IN
IN
OUT
= 6V, V
– V
– V
= 4.3V, ΔV
= – 15V, V
= Off-to-On
= On-to-Off
= 3.3V, V
= 100mA
= 100mA
= 700mA
= 700mA
= 1.5A
= 1.5A
= 3A
= 3A
= 0mA
= 0mA, T
= 100mA
= 100mA, T
= 300mA
= 300mA, T
= 700mA
= 700mA, T
= 1.5A
= 3A
= 0V
OUT
OUT
= 120Hz, I
J
= 25°C.
SHDN
= 1V(Avg), V
= 7V
OUT
OUT
IN
The
J
= 0V
= 125°C (Note 7)
= 0V
J
J
J
LOAD
= 0V
= – 0.1V
= 125°C (Note 7)
= 125°C (Note 7)
= 125°C (Note 7)
l
denotes the specifi cations which apply over the full operating
= 1.5A
RIPPLE
maintain regulation at the specifi ed output current. In dropout the output
voltage will be equal to: (V
Note 6: GND pin current is tested with V
current source load. This means that the device is tested while operating
in its dropout region. This is the worst-case GND pin current. The GND
pin current will decrease slightly at higher input voltages.
Note 7: GND pin current will rise at T
circuitry designed to compensate for leakage currents in the output
transistor at high temperatures. This allows quiescent current to be
minimized at lower temperatures, yet maintain output regulation at high
temperatures with light loads. See quiescent current curve in typical
performance characteristics section.
Note 8: SENSE pin current fl ows into the SENSE pin.
Note 9: SHDN pin current at V
Note 10: Quiescent current in shutdown is equal to the total sum of the
SHDN pin current (40μA) and the GND pin current (70μA).
Note 11: Reverse output current is tested with the input pin grounded
and the OUTPUT pin forced to the rated output voltage. This current
fl ows into the OUTPUT pin and out of the GND pin.
= 0.5V
P-P
,
IN
l
l
l
l
l
l
l
l
l
l
l
l
– V
SHDN
DROPOUT
0.25
MIN
3.2
90
50
= 0V fl ows out of the SHDN pin.
J
> 75°C. This is due to internal
IN
).
= V
1.20
0.75
TYP
150
280
390
570
450
130
120
110
1.9
1.2
2.7
2.6
4.1
7.3
8.8
4.5
4.0
OUT
22
85
37
67
(nominal) and a
LT1528
MAX
2.80
12.0
200
250
320
420
450
600
670
850
750
140
250
100
220
250
2.5
4.0
1.0
40
UNITS
1528fb
3
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mV
mV
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
dB
μA
V
V
A
A

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