Datasheet
LP2952-N, LP2952A, LP2953, LP2953A
www.ti.com
SNVS095D –MAY 2004–REVISED SEPTEMBER 2013
ALL VOLTAGE OPTIONS ELECTRICAL CHARACTERISTICS (continued)
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
e
n
Output Noise Voltage C
L
= 4.7 μF 400
μV
(10 Hz to 100 kHz)
C
L
= 33 μF 260
RMS
I
L
= 100 mA
C
L
= 33 μF
(7)
80
V
REF
Reference Voltage
(8)
1.230 1.215 1.245 1.205 1.255
V
1.205 1.255 1.190 1.270
Reference Voltage Line V
IN
= 2.5V to V
O
(NOM) + 1V 0.03 0.1 0.2
%
Regulation
V
IN
= V
O
(NOM) + 1V to 30V
(9)
0.2 0.4
Reference Voltage Load I
REF
= 0 to 200 μA 0.25 0.4 0.8
%
Regulation
0.6 1.0
Reference Voltage
(2)
20
ppm/°
Temp. Coefficient
C
I
B
(FB) Feedback Pin Bias 20 40 40
nA
Current
60 60
I
O
(SINK) Output “OFF” Pulldown
(10)
30 30
mA
Current
20 20
DROPOUT DETECTION COMPARATOR
I
OH
Output “HIGH” Leakage V
OH
= 30V 0.01 1 1
μA
2 2
V
OL
Output “LOW” Voltage V
IN
= V
O
(NOM) − 0.5V 150 250 250
mV
I
O
(COMP) = 400 μA
400 400
V
THR
Upper Threshold
(11)
−60 −80 −35 −80 −35
mV
(MAX) Voltage
−95 −25 −95 −25
V
THR
Lower Threshold
(12)
−85 −110 −55 −110 −55
mV
(MIN) Voltage
−160 −40 −160 −40
HYST Hysteresis
(12)
15 mV
SHUTDOWN INPUT
(13)
V
OS
Input Offset (Referred to V
REF
) ±3 −7.5 7.5 −7.5 7.5 mV
Voltage −10 10 −10 10
HYST Hysteresis 6 mV
(7) Connect a 0.1 μF capacitor from the output to the feedback pin.
(8) V
REF
≤ V
OUT
≤ (V
IN
− 1V), 2.3V ≤ V
IN
≤ 30V, 100 μA ≤ I
L
≤ 250 mA.
(9) Two separate tests are performed, one covering 2.5V ≤ V
IN
≤ V
O
(NOM)+1V and the other test for V
O
(NOM)+1V ≤ V
IN
≤ 30V.
(10) V
SHUTDOWN
≤ 1.1V, V
OUT
= V
O
(NOM).
(11) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured atV
IN
= V
O
(NOM) + 1V. To express these thresholds in terms of output voltage change, multiply by the Error amplifier gain,
which is V
OUT
/V
REF
= (R1 + R2)/R2(refer to Figure 37).
(12) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured atV
IN
= V
O
(NOM) + 1V. To express these thresholds in terms of output voltage change, multiply by the Error amplifier gain,
which is V
OUT
/V
REF
= (R1 + R2)/R2(refer to Figure 37).
(13) Human body model, 200 pF discharged through 1.5 kΩ.
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