Datasheet

LP2952-N, LP2952A, LP2953, LP2953A
SNVS095D –MAY 2004–REVISED SEPTEMBER 2013 www.ti.com
ALL VOLTAGE OPTIONS ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for T
J
= 25°C, bold typeface applies over the full operating temperature range. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: V
IN
= V
O
(NOM) + 1V, I
L
= 1 mA, C
L
= 2.2 μF for 5V parts and 4.7 μF for 3.3V parts. Feedback pin is tied
to V Tap pin, Output pin is tied to Output Sense pin.
Symbol Parameter Conditions Typical LP2952AI, LP2953AI, LP2952I, LP2953I, Units
LP2952AI-3.3, LP2952I-3.3,
LP2953AI-3.3, LP2953I-3.3
LP2953AM
(1)
Min Max Min Max
REGULATOR
Output Voltage Temp.
(2)
20 100 150
ppm/°
Coefficient
C
Output Voltage Line V
IN
= V
O
(NOM) + 1V to 30V 0.03 0.1 0.2
%
Regulation
0.2 0.4
Output Voltage Load I
L
= 1 mA to 250 mA 0.04 0.16 0.20
%
Regulation
(3)
I
L
= 0.1 mA to 1 mA 0.20 0.30
V
IN
–V
O
Dropout Voltage I
L
= 1 mA 60 100 100
(4)
150 150
I
L
= 50 mA 240 300 300
420 420
mV
I
L
= 100 mA 310 400 400
520 520
I
L
= 250 mA 470 600 600
800 800
I
GND
Ground Pin Current
(5)
I
L
= 1 mA 130 170 170
μA
200 200
I
L
= 50 mA 1.1 2 2
2.5 2.5
I
L
= 100 mA 4.5 6 6
mA
8 8
I
L
= 250 mA 21 28 28
33 33
I
GND
Ground Pin Current at V
IN
= V
O
(NOM) −0.5V 165 210 210 μA
Dropout
I
L
= 100 μA 240 240
I
GND
Ground Pin Current at V
SHUTDOWN
≤ 1.1V 105 140 140
μA
Shutdown
(5)
I
LIMIT
Current Limit V
OUT
= 0 380 500 500
mA
530 530
Thermal Regulation
(6)
0.05 0.2 0.2
%/W
(1) Drive Shutdown pin with TTL or CMOS-low level to shut regulator OFF, high level to turn regulator ON.
(2) Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
(3) Load regulation is measured at constant junction temperature using low duty cycle pulse testing. Two separate tests are performed, one
for the range of 100 μA to 1 mA and one for the 1 mA to 250 mA range. Changes in output voltage due to heating effects are covered
by the thermal regulation specification.
(4) Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a
1V differential. At very low values of programmed output voltage, the input voltage minimum of 2V (2.3V over temperature) must be
observed.
(5) Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the ground pin current,
output load current, and current through the external resistive divider (if used).
(6) Thermal regulation is the change in output voltage at a time T after a change in power dissipation, excluding load or line regulation
effects. Specifications are for a 200 mA load pulse at V
IN
= V
O
(NOM)+15V (3W pulse) for T = 10 ms.
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