LP3872 Datasheet, PDF (7/18 Pages) National Semiconductor (TI) – 1.5A Fast Ultra Low Dropout Linear Regulators

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Lead Temperature
(Soldering, 5 sec.)
ESD Rating (Note 3)
Power Dissipation (Note 2)
Input Supply Voltage (Survival)
Shutdown Input Voltage
(Survival)
Output Voltage (Survival), (Note
6), (Note 7)
−65˚C to +150˚C
260˚C
2 kV
Internally Limited
−0.3V to +7.5V
−0.3V to +7.5V
−0.3V to +6.0V
I_OUT (Survival)
Short Circuit Protected
Maximum Voltage for ERROR
Pin
V_IN
Maximum Voltage for SENSE Pin
V_OUT
Operating Ratings
Input Supply Voltage (Note 11)
Shutdown Input Voltage
Maximum Operating Current (DC)
Junction Temperature
2.5V to 7.0V
−0.3V to 7.0V
1.5A
−40˚C to +125˚C
Electrical Characteristics
LP3872/LP3875
Limits in standard typeface are for T_J = 25˚C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: V_IN = V_O(NOM) + 1V, I_L = 10 mA, C_OUT = 10µF, V_SD = 2V.
Symbol
Parameter
Conditions
Typ
LP3872/5 (Note 5)
Units
(Note 4)
Min
Max
Output Voltage
V_O
Tolerance
(Note 8)
V_OUT +1V ≤ V_IN ≤ 7.0V
10 mA ≤ I_L ≤ 1.5A
-1.5
+1.5
0
%
-3.0
+3.0
∆V _OL
Output Voltage Line
V_OUT + 1V ≤ V_IN ≤ 7.0V
0.02
%
Regulation (Note 8)
0.06
∆V_O/ ∆I_OUT Output Voltage Load
10 mA ≤ I_L ≤ 1.5A
0.06
%
Regulation
0.12
(Note 8)
V_IN - V_OUT
I_L = 150 mA
38
Dropout Voltage
(Note 10)
I_L = 1.5A
380
50
60
mV
450
550
I_L = 150 mA
5
Ground Pin Current In
I_GND
Normal Operation Mode
I_L = 1.5A
6
9
10
mA
14
15
I_GND
Ground Pin Current In
Shutdown Mode
I_O(PK)
Peak Output Current
Short Circuit Protection
V_SD ≤ 0.3V
-40˚C ≤ T_J ≤ 85˚C
V_O ≥ V_O(NOM) - 4%
0.01
1.8
10
µA
50
A
I_SC
Short Circuit Current
3.2
A
7
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