LP2953_15 Datasheet, PDF (7/41 Pages) Texas Instruments – LP295x Adjustable Micropower Low-Dropout Voltage Regulators

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LP2952-N, LP2952A, LP2953, LP2953A
SNVS095F – MAY 2004 – REVISED MARCH 2015
Electrical Characteristics: All Voltage Options (continued)
Limits are assured by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods.
Unless otherwise specified, MIN (minimum) and MAX (maximum) specifications in apply over the full Operating Temperature
Range and TYP (typical) values apply at T_J = 25°C, V_IN = V_OUT(NOM) + 1 V, I_OUT = 1 mA, C_OUT = 2.2 μF for 5-V parts and 4.7
μF for 3.3-V parts. FEEDBACK pin is tied to VTAP pin, OUT pin is tied to SENSE pin.
PARAMETER
TEST CONDITIONS
LP2952AI, LP2953AI,
LP2952AI-3.3, LP2953AI-3.3⁽¹⁾
MIN
TYP
MAX
LP2952I, LP2953I,
LP2952I-3.3, LP2953I-3.3
MIN TYP MAX
UNIT
e_n
V_REF
Output noise
voltage (10 Hz
to 100 kHz)
I_OUT = 100 mA
Reference
voltage
C_OUT = 4.7 μF
C_OUT = 33 μF
C_OUT = 33 μF ⁽⁷⁾
T_J = 25°C, see⁽⁸⁾
see ⁽⁸⁾,
1.215
1.205
400
400
260
260
μV
RMS
80
80
1.23
1.245 1.205
1.23 1.255
V
1.255 1.19
1.27
Reference
voltage line
regulation
V_IN = 2.5 V to V_OUT + 1 V
V_IN = V_OUT(NOM)+ 1 V to 30 V ⁽⁹⁾
0.03%
0.03%
0.1%
0.2%
0.03%
0.03%
0.2%
0.4%
Reference
voltage load
regulation
T_J = 25°C, I_REF = 0 to 200 μA
I_REF = 0 to 200 μA
0.25%
0.25%
0.4%
0.6%
0.25%
0.25%
0.8%
1.0%
Reference
voltage
temperature
See⁽²⁾, –40°C ≤ T_J ≤ 125°C
20
coefficient
20
ppm/°C
I_B(FB)
I_O(SINK)
Feedback pin
bias current
T_J = 25°C
Output off
T_J = 25°C; see ⁽¹⁰⁾
pulldown current _See ⁽¹⁰⁾
20
40
20
60
20
40
nA
20
60
30
30
mA
20
20
DROPOUT DETECTION COMPARATOR
I_OH
V_OL
V_THR(MAX)
V_THR(MIN)
HYST
Output high
leakage
Output low
voltage
Upper threshold
voltage
Lower threshold
voltage
Hysteresis
T_J = 25°C, V_OH = 30 V
V_OH = 30 V
T_J = 25°C, V_IN = V_OUT(NOM) −
0.5 V
I_OUT(COMP) = 400 μA
V_IN = V_OUT(NOM) − 0.5 V
I_OUT(COMP) = 400 μA
T_J = 25°C, see⁽¹¹⁾
See ⁽¹¹⁾
T_J = 25°C, see⁽¹¹⁾
See ⁽¹¹⁾
See ⁽¹¹⁾
0.01
0.01
150
150
−80
−60
−95
−60
−110
−85
−160
−85
15
1
2
250
400
−35
−80
−25
−95
−55 −110
−40 −160
0.01
0.01
150
150
−60
−60
−85
−85
15
1
μA
2
250
mV
400
−35
mV
−25
−55
mV
−40
mV
(7) Connect a 0.1-μF capacitor from the OUT pin to the FEEDBACK pin.
(8) V_REF ≤ V_OUT ≤ (V_IN − 1 V), 2.3 V ≤ V_IN ≤ 30 V, 100 μA ≤ I_OUT ≤ 250 mA.
(9) Two separate tests are performed, one covering 2.5 V ≤ V_IN ≤ V_OUT(NOM)) + 1 V and the other test for V_OUT(NOM) + 1 V ≤ V_IN ≤ 30 V.
(10) V_SHUTDOWN ≤ 1.1 V, V_OUT = V_OUT(NOM)
(11) Comparator thresholds are expressed in terms of a voltage differential at the FEEDBACK pin below the nominal reference voltage
measured at V_IN = V_OUT(NOM) + 1 V. 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 (see Figure 31).
Copyright © 2004–2015, Texas Instruments Incorporated
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