Datasheet

LP4950C-5V, LP4951C
www.ti.com SNVS208C –SEPTEMBER 2002–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
(1)
LP4950CZ
LP4951CM
Conditions
Parameter Units
(1)
Tested Design
Typ Limit
(2)
Limit
(3)
Output Voltage T
J
= 25°C 5.0 5.1 V max
4.9 V min
−25°C ≤ T
J
≤ 85°C 5.15 V max
4.85 V min
Full Operating Temperature Range 5.2 V max
4.8 V min
Output Voltage 100 μA ≤ I
L
≤ 100 mA 5.24 V max
T
J
≤ T
JMAX
4.76 V min
Output Voltage Temperature
(4)
150 ppm/°C
Coefficient
Line Regulation
(5)
6V ≤ V
IN
≤ 30V
(6)
0.04 0.2 % max
0.4 % max
Load Regulation
(5)
100μA ≤ I
L
≤ 100mA 0.1 0.2 % max
0.3 % max
Dropout Voltage
(7)
I
L
= 100μA 50 80 mV max
150 mV max
I
L
= 100mA 380 450 mV max
600 mV max
Ground Current I
L
= 100μA 75 150 μA max
170 μA max
I
L
= 100mA 8 15 mA max
19 mA max
Dropout Ground Current V
IN
= 4.5V 110 200 μA max
I
L
= 100μA
230 μA max
Current Limit V
OUT
= 0 160 200 mA max
220 mA max
Thermal Regulation
(8)
0.05 0.2 %/W max
Output Noise, 10 Hz to 100 kHz C
L
= 1μF 430 μV rms
C
L
= 200μF 160 μV rms
C
L
= 3.3μF (Bypass = 0.01μF Pins 7 100 μV rms
to 1 (LP4951C)
(1) Unless otherwise noted all limits specified for V
IN
= 6V, I
L
= 100μA and C
L
= 1μF. Limits appearing in boldface type apply over the
entire junction temperature range for operation. Limits appearing in normal type apply for T
A
= T
J
= 25°C. Additional conditions for the 8-
pin versions are FEEDBACK tied to V
TAP
, OUTPUT tied to SENSE (V
OUT
= 5V), and V
SHUTDOWN
≤ 0.8V.
(2) Specified and 100% production tested.
(3) Specified but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
(4) Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
(5) 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.
(6) Line regulation for the LP4951C is tested at 150°C for I
L
= 1 mA. For I
L
= 100μA and T
J
= 125°C, line regulation is specified by design to
0.2%. See Typical Performance Characteristics for line regulation versus temperature and load current.
(7) Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value
measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over
temperature) must be taken into account.
(8) Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load
or line regulation effects. Specifications are for a 50 mA load pulse at V
IN
= 30V (1.25W pulse) for T = 10ms.
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