Datasheet
LP3873, LP3876
SNVS220E –NOVEMBER 2002–REVISED APRIL 2013
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Electrical Characteristics
LP3873/LP3876
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)
+ 1.5V, I
L
= 10 mA, C
OUT
= 10µF, V
SD
= 2V.
Symbol Parameter Conditions Typ
(1)
LP3873/6
(2)
Units
Min Max
Output Voltage Tolerance
(3)
V
OUT
+1.5V ≤ V
IN
≤ 7.0V -1.5 +1.5
V
O
0 %
10 mA ≤ I
L
≤ 3A -3.0 +3.0
ΔV
OL
Output Voltage Line V
OUT
+ 1.5V ≤ V
IN
≤ 7.0V 0.02 %
Regulation
(3)
0.06
ΔV
O
/ ΔI
OUT
Output Voltage Load 10 mA ≤ I
L
≤ 3A 0.08 %
Regulation
(3)
0.14
V
IN
- V
OUT
I
L
= 300 mA 80 100
120
Dropout Voltage
(4)
mV
I
L
= 3A 800 1000
1200
I
L
= 300 mA 5 9
10
Ground Pin Current In Normal
I
GND
mA
Operation Mode
I
L
= 3A 6 14
15
I
GND
Ground Pin Current In V
SD
≤ 0.3V 1 10 µA
Shutdown Mode
-40°C ≤T
J
≤ 85°C 50
I
O(PK)
Peak Output Current V
O
≥ V
O(NOM)
- 4% 4.5 A
SHORT CIRCUIT PROTECTION
I
SC
Short Circuit Current 6 A
SHUTDOWN INPUT
Output = High V
IN
2
V
SDT
Shutdown Threshold V
Output = Low 0 0.3
T
dOFF
Turn-off delay I
L
= 3A 20 µs
T
dON
Turn-on delay I
L
= 3A 25 µs
I
SD
SD Input Current V
SD
= V
IN
1 nA
ERROR FLAG
V
T
Threshold See
(5)
10 5 16 %
V
TH
Threshold Hysteresis See
(5)
5 2 8 %
V
EF(Sat)
Error Flag Saturation I
sink
= 100µA 0.02 0.1 V
Td Flag Reset Delay 1 µs
I
lk
Error Flag Pin Leakage 1 nA
Current
I
max
Error Flag Pin Sink Current V
Error
= 0.5V 1 mA
(1) Typical numbers are at 25°C and represent the most likely parametric norm.
(2) Limits are specified by testing, design, or statistical correlation.
(3) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.
Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line
and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the
output voltage tolerance specification.
(4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.
Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is
nothing but the input to output differential, since the minimum input voltage is 2.5V.
(5) Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.
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