LP3990

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SNVS251J – MAY 2004 – REVISED SEPTEMBER 2014

6.5 Electrical Characteristics

(1) (2)

Unless otherwise noted, VEN = 950 mV, VIN = VOUT + 1 V or VIN = 2 V, whichever is higher. CIN = 1 µF, IOUT = 1 mA, COUT =

0.47 µF.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input voltage

Note (3), TJ = 25°C

2

6

V

DSBGA

–1

1%

ILOAD = 1 mA

WQFN

–1.5%

1.5%

TJ = 25°C

SOT-23

–1.5%

1.5%

Output voltage tolerance

DSBGA

–2.5%

2.5%

Over full line and load

WQFN

–3%

3%

regulation

SOT-23

–4%

4%

Line regulation error

VIN = (VOUT(NOM) + 1 V) to 6 V

0.1

0.02

0.1

%/V

VOUT = 0.8 V to 1.95

ΔVOUT

V

–0.005

0.002

0.005

DSBGA

VOUT = 0.8 V to 1.95

V

–0.008

0.003

0.008

IOUT = 1 mA

Load regulation error

%/mA

WQFN, SOT-23

to 150 mA

VOUT = 2 V to 3.3 V

–0.002

0.0005

0.002

DSBGA

VOUT = 2 V to 3.3 V

–0.005

0.002

0.005

WQFN, SOT-23

VDO

Dropout voltage

IOUT = 150 mA

(4) (5)

120

200

mV

ILOAD

Load current

Note (5)(6), TJ = 25°C

0

µA

VEN = 950 mV, IOUT = 0 mA

43

80

IQ

Quiescent current

VEN = 950 mV, IOUT = 150 mA

65

120

µA

VEN = 0.4 V (output disabled), TJ = 25°C

0.002

0.2

ISC

Short circuit current limit

Note (7)

550

1000

mA

IOUT

Maximum output current

150

ƒ = 1 kHz, IOUT = 1 mA to 150 mA

55

Power Supply Rejection

PSRR

dB

Ratio

ƒ = 10 kHz, IOUT = 150 mA

35

VOUT = 0.8 V

60

BW = 10 Hz to 100

eη

Output noise voltage(5)

VOUT = 1.5 V

125

µVRMS

kHz

VOUT = 3.3 V

180

Junction temperature (TJ) rising until the

155

Thermal shutdown

output is disabled

TSHUTDOWN

°C

junction temperature

Hysteresis

15

(1)

All voltages are with respect to the device GND terminal, unless otherwise stated.

(2)

Minimum and Maximum limits are ensured through test, design, or statistical correlation over the operating junction temperature range

(TJ) of –40°C to 125°C, unless otherwise stated. Typical values represent the most likely parametric norm at TJ = 25°C, and are

provided for reference purposes only.

(3)

VIN(MIN) = VOUT(NOM) + 0.5 V, or 2 V, whichever is higher.

(4)

Dropout voltage is voltage difference between input and output at which the output voltage drops to 100 mV below its nominal value.

This parameter applies only for output voltages above 2 V.

(5)

This electrical specification is verified by design.

(6)

The device maintains the regulated output voltage without the load.

(7)

Short-circuit current is measured with VOUT pulled to 0 V and VIN worst case = 6 V.

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