LP2951
Electrical Characteristics
(Refer to the test circuit, Ta = 25
°C,
unless otherwise specified, )
Parameter
ALL VOLTAGE OPTIONS
Output Voltage Temperature Coefficient
Line Regulation (Note2)
Load Regulation (Note2)
Dropout Voltage
Ground Current
Current Limit
8-PIN VERSIONS ONLY
Reference Voltage
ERROR COMPARATOR
Output Low Voltage
High Threshold Voltage
Low Threshold Voltage
Hysteresis
SHUTDOWN INPUT
Shutdown Threshold Range
Shutdown Input Current
V
SD
I
SD
(Note5)
V
SD
= 2.4V
V
SD
= 28V
0.6
-
-
1.3
30
450
2.0
100
750
V
uA
uA
V
OL
V
TH
V
TL
V
HYS
V
IN
= (Vo - 0.5)V, I
OL
=400uA
(Note4)
(Note4)
(Note4)
-
25
-
-
150
60
75
15
400
-
140
-
mV
mV
mV
mV
V
REF
V
REF
(Note3)
1.235 1.26 1.285
1.225 1.26 1.295
V
V
∆V
/
∆T
∆V
∆V
V
D
I
G
I
CL
(Note1)
(Vo + 1)V≤V
IN
≤28V
I
L
= 50mA
100uA≤ I
L
≤100mA
I
L
= 100uA
I
L
= 100mA
I
L
= 100uA
I
L
= 100mA
V
O
= 0V
-
-
-
-
-
-
-
110
50
-
-
-
-
-
-
165
-
0.4
0.3
150
600
140
7
220
ppm/°C
%
%
mV
mV
uA
mA
mA
Symbol
Conditions
Min.
Typ. Max.
Unit
Note :
1. Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total
temperature range.
2. Regulation is measured at constant junction temperature , using pulse testing with a low duty cycle.
3. V
ref
≤
V
out
≤
(V
in
- 1V), 2.5V
≤
V
in
≤
28V, 100uA
≤
I
L
≤
100mA, T
A
≤
T
AMAX
.
4. Threshold and hysteresis are expressed in terms of voltage differential at the Feedback terminal below the normal
reference . To express these thresholds in terms of output voltage change , multiply by the error amplifier gain
= VO / VREF = (R1 + R2) / R2 .
5. Vshutdown
≤
0.6 V , V
OUT
=ON , Vshutdown
≥
2.0 V, V
OUT
= OFF.
3
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
