LP2950_11 Datasheet, PDF (5/31 Pages) Texas Instruments – ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN

LP2950
LP2951
www.ti.com
SLVS582G – APRIL 2006 – REVISED JULY 2011
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
3-V VERSION (LP295x-30)
V_OUT
Output voltage
I_L = 100 μA
25°C
2.970
3
–40°C to 125°C 2.940
3
3.3-V VERSION (LP295x-33)
V_OUT
Output voltage
I_L = 100 μA
25°C
3.267
3.3
–40°C to 125°C 3.234
3.3
5-V VERSION (LP295x-50)
V_OUT
Output voltage
I_L = 100 μA
25°C
4.950
5
–40°C to 125°C 4.900
5
ALL VOLTAGE OPTIONS
Output voltage temperature
coefficient ⁽¹⁾
I_L = 100 μA
–40°C to 125°C
20
Line regulation⁽²⁾
V_IN = [V_OUT(NOM) + 1 V] to 30 V
25°C
–40°C to 125°C
0.03
Load regulation⁽²⁾
I_L = 100 μA to 100 mA
25°C
0.04
–40°C to 125°C
V_IN – V_OUT Dropout voltage⁽³⁾
I_L = 100 μA
I_L = 100 mA
25°C
50
–40°C to 125°C
25°C
380
–40°C to 125°C
I_GND
GND current
I_L = 100 μA
I_L = 100 mA
25°C
75
–40°C to 125°C
25°C
8
–40°C to 125°C
Dropout ground current
V_IN = V_OUT(NOM) – 0.5 V,
I_L = 100 μA
25°C
110
–40°C to 125°C
Current limit
Thermal regulation⁽⁴⁾
Output noise (RMS),
10 Hz to 100 kHz
V_OUT = 0 V
I_L = 100 μA
C_L = 1 μF (5 V only)
C_L = 200 μF
LP2951-50: C_L = 3.3 μF,
C_Bypass = 0.01 μF between pins 1 and
7
25°C
–40°C to 125°C
25°C
25°C
160
0.05
430
160
100
MAX UNIT
3.030
V
3.060
3.333
V
3.366
5.050
V
5.100
100 ppm/°C
0.2
%/V
0.4
0.2
%
0.3
80
150
mV
450
600
120
μA
140
12
mA
14
170
μA
200
200
mA
220
0.2 %/W
μV
(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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