LP2954IS Datasheet, PDF (4/24 Pages) Texas Instruments – LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators

LP2954, LP2954A
SNVS096D – JUNE 1999 – REVISED MARCH 2013
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Electrical Characteristics (continued)
Limits in standard typeface are for T_J = 25°C, bold typeface applies over the −40°C to +125°C temperature range. Limits
are specified by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise noted: V_IN = 6V, I_L = 1 mA, C_L = 2.2 μF.
Symbol
Parameter
Conditions
Typical
2954AI
Min
Max
2954I
Min
Max
Units
Additional Specifications for the Adjustable Device (LP2954AIM and LP2954IM)
V_REF
Reference Voltage
See ⁽⁸⁾
1.230
1.215
1.205
1.245
1.255
1.205
1.190
1.255
1.270
V
ΔV_REF/
V_IN=2.5V to
0.03
0.1
V_REF
Reference Voltage
VO(NOM)+1V
Line Regulation
V_IN=2.5V to
0.2
VO(NOM)+1V to 30V⁽⁹⁾
0.2
%
0.4
%
ΔV_REF/ΔT Reference Voltage
Temperature
See ⁽²⁾
20
Coefficient
ppm/°C
I_B(FB)
Feedback Pin Bias
Current
20
40
60
40
60
nA
I_GND
I_O(SINK)
Ground Pin Current at
Shutdown ⁽⁵⁾
Output "OFF" Pulldown
Current
V_SHUTDOWN≤1.1V
See ⁽¹⁰⁾
105
140
140
μA
30
20
30
20
mA
Dropout Detection Comparator
I_OH
Output "HIGH"
V_OH=30V
0.01
1
Leakage Current
2
1
2
μA
V_OL
Output "LOW" Voltage
V_THR(MAX) Upper Threshold
Voltage
V_THR(MIN) Lower Threshold
Voltage
HYST Hysteresis
V_IN=V_O(NOM)−0.5V
I_O(COMP)=400μA
See ⁽¹¹⁾
See ⁽¹²⁾
See ⁽¹²⁾
150
250
400
250
400
mV
−60
−80
−95
−35
−25
−80
−95
−35
−25
mV
−85
−110
−55
−110
−55
−160
−40
−160
−40
mV
15
mV
Shutdown Input
V_OS
Input Offset Voltage
(Referred to V_REF)
±3
−7.5
7.5
−7.5
7.5
−10
10
−10
10
mV
HYST Hysteresis
6
mV
I_B
Input Bias Current
V_IN(S/D)=0V to 5V
10
−30
30
−30
30
−50
50
−50
50
nA
(8) V_REF≤V_OUT≤(V_IN−1V), 2.3V≤V_IN≤30V, 100μA≤I_L≤250mA.
(9) Two seperate tests are performed, one covering V_IN=2.5V to V_O(NOM)+1V and the other test for V_IN=2.5V to V_O(NOM)+1V to 30V.
(10) V_SHUTDOWN≤1.1V, VOUT=V_O(NOM).
(11) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured at V_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.
(12) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured at V_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.
4
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