Datasheet
LP3852, LP3855
www.ti.com
SNVS174G –FEBRUARY 2003–REVISED APRIL 2013
Electrical Characteristics
LP3852/LP3855
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.
LP3852/5
(2)
Symbol Parameter Conditions Typ
(1)
Units
Min Max
Output Voltage Tolerance V
OUT
+1V ≤ V
IN
≤ 7.0V -1.5 +1.5
V
O
0 %
(3)
10 mA ≤ I
L
≤ 1.5A -3.0 +3.0
Output Voltage Line Regulation 0.02
ΔV
OL
V
OUT
+1V ≤ V
IN
≤ 7.0V %
(3)
0.06
Output Voltage Load Regulation 0.06
ΔV
O
/ ΔI
OUT
10 mA ≤ I
L
≤ 1.5A %
(3)
0.12
35
I
L
= 150 mA 24
Dropout Voltage
45
TO-263 and TO-220
280
(4)
I
L
= 1.5A 240 mV
380
V
IN
- V
OUT
35
I
L
= 150mA 26
Dropout Voltage
45
SOT 223
320
(4)
,
(5)
I
L
= 1.5A 260
435
9
I
L
= 150 mA 3
10
Ground Pin Current In Normal
I
GND
mA
Operation Mode
9
I
L
= 1.5A 3
10
V
SD
≤ 0.3V 0.01 10
Ground Pin Current In Shutdown
I
GND
µA
Mode
-40°C ≤ T
J
≤ 85°C 50
I
O(PK)
Peak Output Current V
O
≥ V
O(NOM)
- 4% 1.8 A
Short Circuit Protection
I
SC
Short Circuit Current 3.2 A
Shutdown Input
V
SDT
Rising from 0.3V until
1.3 2
Output = ON
V
SDT
Shutdown Threshold V
V
SDT
Falling from 2.0V until 1.3 0.3
Output = OFF
T
dOFF
Turn-off delay I
L
= 1.5A 20 µs
T
dON
Turn-on delay I
L
= 1.5A 25 µs
I
SD
SD Input Current V
SD
= V
IN
1 nA
Error Flag
V
T
Threshold
(6)
10 5 16 %
V
TH
Threshold Hysteresis
(6)
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 Current 1 nA
I
max
Error Flag Pin Sink Current V
Error
= 0.5V 1 mA
AC Parameters
(1) Typical numbers are at 25°C and represent the most likely parametric norm.
(2) Limits are spedified 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) The SOT 223 package devices have slightly higher dropout due to increased bond wire resistance.
(6) Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.
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