LP2950_1 Datasheet, PDF (3/8 Pages) First Components International – 150mA Low Drop Out Voltage Regulators

LP2950/LP2951 150mA Low Drop Out Voltage Regulators
PARAMETER
ERROR Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Power Threshold Voltage
Hysteresis
Shutdown Input
Output Logic Voltage
Shutdown Pin Input
Current
Regulator Output Current
in Shutdown
CONDITIONS
(Note 2)
LP2950BC
LP2951BC
Min Typ Max
LP2950AC
LP2951AC
Min Typ Max
LP2950C
UNITS
LP2951C
Min Typ Max
V_oh = 30V
V_in = 4.5V
I_ol = 400µA
(Note 8)
(Note 8)
(Note 8)
0.01
1
150
250
40
60
75
95
15
0.01
1
150
250
40
60
40
75
95
15
1
µA
150
250
mV
60
mV
75
95
mV
15
mV
Low (Regulator ON)
High (Regulator OFF)
V_S = 2.4V
V_S = 30V
V_out = 0
1.3
0.7
2
30
50
450
600
3
10
1.3
0.7
2
2
30
50
450
600
3
10
1.3
0.7
V
30
50
µA
450
600
3
00
µA
Note 1: Output or reference voltage temperature coefficients
defined as the worst case voltage change divided by the total
temperature range.
Note 2: Unless otherwise specified all limits guaranteed for
T_J=25^oC, V_in=6V, I_L=100µA and C_L=100µF. Additional
conditions for the 8-pin versions are feedback tied to 5V tap
output Sense (V_out=5V) and V_shutdown<0.8V.
Note 3: Regulation is measured at constant junction
temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered
under the specification for thermal regulation.
Note 4: Line regulation for the LP2951 is tested at 150^oC
for I_L=1mA. For I_L=100µA and T_J=150^oC, line regulation is
guaranteed by design to 0.2%. See typical performance
characteristics for line regulation versus temperature and
load current.
Note 5: Dropout Voltage is defined as the input to output
differential at which the output voltage drops 100mV below
its nominal value measured at 1V differential at very low
value of programmed output voltage, the minimum input
supply voltage of 2V (2.3V over temperature) must be taken
into account.
Note 6: V_ref < V_out < (V_in-1V), 2.3V < V_in < 30V,
100µA < I_L < 100mA, T_J < T_JMAX.
Note 7: Output or reference voltage temperature coefficient
is defined as the worst case voltage change divided by the
total temperature range.
Note 8: Comparator thresholds are expressed in terms of a
voltage differential at the feedbackterminal below the
nominal reference voltage measured at 6V input . To
express these thresholds in terms of output voltage change,
multiply
by
the
error
amplifier
gain=Vout/Vref=(R1+R2)/R2. For example, at a programmed
output voltage of 5V, the Error output is guaranteed to go
low when the output drops by 95mV X 5V/1.235=384mV.
Thresholds remain constant as a percent of Vout as Vout is
varied with the dropout warning occuring at typically 5%
below nominal, 7.5% guaranteed.
Note 9: V_shutdown>2V, V_in < 30V, V_out = 0, Feedback pin tied to
5V Tap.
3-3