LP2950 datasheet(5/32 Pages) TI

5 / 32 page

LP2950, LP2951

www.ti.com

SLVS582I – APRIL 2006 – REVISED NOVEMBER 2014

6.5 Electrical Characteristics

VIN = VOUT (nominal) + 1 V, IL = 100 μA, CL = 1 μF (5-V versions) or CL = 2.2 μF (3-V and 3.3-V versions),

8-pin version: FEEDBACK tied to VTAP, OUTPUT tied to SENSE, VSHUTDOWN ≤ 0.7 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

3-V VERSION (LP295x-30)

25°C

2.970

3.030

VOUT

Output voltage

IL = 100 μA

–40°C to 125°C

2.940

3.060

3.3-V VERSION (LP295x-33)

25°C

3.267

3.3

3.333

VOUT

Output voltage

IL = 100 μA

–40°C to 125°C

3.234

3.3

3.366

5-V VERSION (LP295x-50)

25°C

4.950

5.050

VOUT

Output voltage

IL = 100 μA

–40°C to 125°C

4.900

5.100

ALL VOLTAGE OPTIONS

Output voltage temperature

IL = 100 μA

–40°C to 125°C

100 ppm/°C

coefficient(1)

25°C

0.03

0.2

Line regulation(2)

VIN = [VOUT(NOM) + 1 V] to 30 V

%/V

–40°C to 125°C

0.4

25°C

0.04%

0.2%

Load regulation(2)

IL = 100 μA to 100 mA

—

–40°C to 125°C

0.3%

25°C

IL = 100 μA

–40°C to 125°C

150

VIN – VOUT Dropout voltage

(3)

25°C

380

450

IL = 100 mA

–40°C to 125°C

600

25°C

120

IL = 100 μA

μA

–40°C to 125°C

140

IGND

GND current

25°C

IL = 100 mA

–40°C to 125°C

25°C

110

170

VIN = VOUT(NOM) – 0.5 V,

Dropout ground current

μA

IL = 100 μA

–40°C to 125°C

200

25°C

160

200

Current limit

VOUT = 0 V

–40°C to 125°C

220

Thermal regulation(4)

IL = 100 μA

25°C

0.05

0.2

%/W

CL = 1 μF (5 V only)

430

CL = 200 μF

160

Output noise (RMS),

25°C

μV

LP2951-50: CL = 3.3 μF,

10 Hz to 100 kHz

CBypass = 0.01 μF between

100

pins 1 and 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 VIN = 30 V, VOUT = 5 V (1.25-W pulse) for t = 10 ms.

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