LP3961/LP3964
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 V
IN
+0.3V
−0.3V to +7.5V
I
OUT
(Survival)
Maximum Voltage for ERROR Pin
Maximum Voltage for SENSE Pin
Short Circuit Protected
V
IN
+0.3V
V
OUT
+0.3V
Operating Ratings
Input Supply Voltage (Operating)
Shutdown Input Voltage
(Operating)
Maximum Operating Current
(DC)
Operating Junction Temp. Range
2.5V to 7.0V
−0.3V to V
IN
+0.3V
0.8A
−40˚C to +125˚C
Electrical Characteristics
LP3961/LP3964
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
= V
IN
-0.3V.
Symbol
Parameter
Conditions
V
OUT
+1V
<
V
IN
<
7.0V
10 mA
<
I
L
<
800 mA
3.135
≤
V
IN
≤
7.0 for
V
OUT
= 2.5V
V
OUT
+1V
<
V
IN
<
7.0V,
10 mA
<
I
L
<
800 mA
Typ(Note
4)
LP3961/4
(Note 5)
Min
-1.5
-3.0
Max
+1.5
+3.0
Units
V
O
∆V
OL
∆V
O
/
∆I
OUT
V
IN
-
V
OUT
Output Voltage
Tolerance
(Note 8)
Output Voltage Line
Regulation (Note 8)
Output Voltage Load
Regulation
(Note 8)
Dropout Voltage
(Note 10)
0
%
0.02
0.06
0.02
0.08
24
240
3
4
15
30
35
300
350
9
10
14
15
25
75
1.2
1.1
%
%
I
L
= 80 mA
I
L
= 800 mA
I
L
= 80 mA
I
L
= 800 mA
V
SD
≤
0.2V
mV
I
GND
Ground Pin Current In
Normal Operation
Mode
Ground Pin Current In
Shutdown Mode
(Note 11)
Peak Output Current
mA
I
GND
µA
I
O(PK)
(Note 2)
1.5
A
SHORT CIRCUIT PROTECTION
I
SC
Tsh(t)
Tsh(h)
Short Circuit Current
Shutdown Threshold
Thermal Shutdown
Hysteresis
Output = High
Output = Low
I
L
= 800 mA
I
L
= 800 mA
V
SD
= V
IN
2.8
165
10
A
˚C
˚C
OVER TEMPERATURE PROTECTION
SHUTDOWN INPUT
V
SDT
T
dOFF
T
dON
I
SD
Shutdown Threshold
Turn-off delay
Turn-on delay
SD Input Current
V
IN
0
20
25
1
V
IN
–0.3
0.2
V
µs
µs
nA
7
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