LP3981

www.ti.com

SNVS159H – OCTOBER 2001 – REVISED JULY 2015

6.5 Electrical Characteristics

Unless otherwise specified: VEN = 1.2 V, VIN = VOUT + 0.5 V, CIN = 2.2 µF, CBP = 0.033 µF, IOUT = 1 mA, COUT = 2.2 µF. All

values are for TJ = 25°C, unless otherwise specified.

(1) (2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

−2

2

% of

Output voltage tolerance

VOUT(nom)

TJ = –40°C to +125°C

–3

3

VIN = VOUT + 0.5 V to 6 V, TA < 85°C

−0.1

0.005

0.1

Line regulation error

%/V

ΔVOUT

VIN = VOUT + 0.5 V to 6 V, TJ ≤125°C

–0.2

0.2

IOUT = 1 mA to 300 mA

0.0003

Load regulation error(3)

%/mA

IOUT = 1 mA to 300 mA

0.005

TJ = –40°C to +125°C

VIN = VOUT(nom) + 1 V,

50

ƒ = 1 kHz,

IOUT = 50 mA (Figure 16)

PSRR

Power supply rejection ratio(4)

dB

VIN = VOUT(nom) + 1 V,

55

ƒ = 10 kHz,

IOUT = 50 mA (Figure 16)

VEN = 1.2 V, IOUT = 1 mA

70

VEN = 1.2 V, IOUT = 1 mA

120

TJ = –40°C to +125°C

VEN = 1.2 V, IOUT = 1 mA to 300 mA,

170

VOUT = 2.5 V

(5)

IQ

Quiescent current

µA

VEN = 1.2 V, IOUT = 1 mA to 300 mA,

210

VOUT = 2.5 V

TJ = –40°C to +125°C

(5)

VEN = 0.4 V

0.003

VEN = 0.4 V, TJ = –40°C to +125°C

1.5

IOUT = 1 mA

0.5

IOUT = 1 mA, TJ = –40°C to +125°C

5

IOUT = 200 mA

88

Dropout voltage (6)

mV

IOUT = 200 mA, TJ = –40°C to +125°C

133

IOUT = 300 mA

132

IOUT = 300 mA, TJ = –40°C to +125°C

200

ISC

Short-circuit current limit

Output grounded (steady state)

600

mA

BW = 10 Hz to 100 kHz,

en

Output noise voltage

35

µVRMS

CBP = 0.033 µF

Thermal shutdown temperature

160

TSD

°C

Thermal shutdown hysteresis

20

IOUT(PK) Peak output current

VOUT ≥ VOUT (nom) – 5%

300

455

mA

IEN

Maximum input current at VEN

VEN = 0 and VIN

0.001

µA

VIL

Logic low input threshold

VIN = 2.7 V to 6 V, TJ = –40°C to +125°C

0.4

VIH

Logic high input threshold

VIN = 2.7 V to 6 V, TJ = –40°C to +125°C

1.4

(1)

Minimum (MIN) and maximum (MAX) limits are ensured by design, test, or statistical analysis. Typical (TYP) numbers are not verified,

but do represent the most likely norm.

(2)

The target output voltage, which is labeled VOUT(nom), is the desired voltage option.

(3)

An increase in the load current results in a slight decrease in the output voltage and vice versa.

(4)

Specified by design. Not production tested.

(5)

For VOUT > 2.5 V, increase IQ(MAX) by 2.5 µA for every 0.1 V increase in VOUT(nom); that is,

IQ(MAX) = 210 µA + ((VOUT(NOM) – 2.5) × 25) µA .

(6)

Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This

specification does not apply for input voltages below 2.5 V.

Copyright © 2001–2015, Texas Instruments Incorporated

Submit Documentation Feedback

5

Product Folder Links: LP3981