Datasheet

LP2950
LP2951
www.ti.com SLVS582H –APRIL 2006–REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS
V
IN
= V
OUT
(nominal) + 1 V, I
L
= 100 μA, C
L
= 1 μF (5-V versions) or C
L
= 2.2 μF (3-V and 3.3-V versions),
8-pin version: FEEDBACK tied to V
TAP
, OUTPUT tied to SENSE, V
SHUTDOWN
≤ 0.7 V
PARAMETER TEST CONDITIONS T
J
MIN TYP MAX UNIT
3-V VERSION (LP295x-30)
25°C 2.970 3 3.030
V
OUT
Output voltage I
L
= 100 μA V
–40°C to 125°C 2.940 3 3.060
3.3-V VERSION (LP295x-33)
25°C 3.267 3.3 3.333
V
OUT
Output voltage I
L
= 100 μA V
–40°C to 125°C 3.234 3.3 3.366
5-V VERSION (LP295x-50)
25°C 4.950 5 5.050
V
OUT
Output voltage I
L
= 100 μA V
–40°C to 125°C 4.900 5 5.100
ALL VOLTAGE OPTIONS
Output voltage temperature
I
L
= 100 μA –40°C to 125°C 20 100 ppm/°C
coefficient
(1)
25°C 0.03 0.2
Line regulation
(2)
V
IN
= [V
OUT(NOM)
+ 1 V] to 30 V %/V
–40°C to 125°C 0.4
25°C 0.04 0.2
Load regulation
(2)
I
L
= 100 μA to 100 mA %
–40°C to 125°C 0.3
25°C 50 80
I
L
= 100 μA
–40°C to 125°C 150
V
IN
– V
OUT
Dropout voltage
(3)
mV
25°C 380 450
I
L
= 100 mA
–40°C to 125°C 600
25°C 75 120
I
L
= 100 μA μA
–40°C to 125°C 140
I
GND
GND current
25°C 8 12
I
L
= 100 mA mA
–40°C to 125°C 14
25°C 110 170
V
IN
= V
OUT(NOM)
– 0.5 V,
Dropout ground current μA
I
L
= 100 μA
–40°C to 125°C 200
25°C 160 200
Current limit V
OUT
= 0 V mA
–40°C to 125°C 220
Thermal regulation
(4)
I
L
= 100 μA 25°C 0.05 0.2 %/W
C
L
= 1 μF (5 V only) 430
C
L
= 200 μF 160
Output noise (RMS),
25°C μV
LP2951-50: C
L
= 3.3 μF,
10 Hz to 100 kHz
C
Bypass
= 0.01 μF between pins 1 and 100
7
(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. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
(3) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 100 mV, below the value measured at 1-V
differential. The minimum input supply voltage of 2 V (2.3 V over temperature) must be observed.
(4) 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
= 30 V, V
OUT
= 5 V (1.25-W pulse) for t = 10 ms.
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