LP3992

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SNVS192C – OCTOBER 2002 – REVISED NOVEMBER 2015

6.5 Electrical Characteristics

Unless otherwise noted, VEN = 1.15, VIN = VOUT + 1 V, CIN = 1 µF, IOUT = 1 mA, COUT = 1 µF; typical values and limits apply for

TJ = 25°C, and minimum and maximum limits apply over the full temperature range for operation, −40°C to +125°C.

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input voltage

TJ = 25°C

1.9

5.2

mV

Output voltage tolerance

Over full line and load regulation.

–90

90

mV

VIN = (VOUT(NOM) + 1 V) to 5.2 V,

ΔVOUT

Line regulation error

–0.27

0.27

%/V

IOUT = 1 mA

Load regulation error

IOUT = 1 mA to 30 mA

100

220

µV/mA

ILOAD

Load current

See(2) and (3)

0

µA

VEN = 1.15 V, IOUT = 0 mA

26

50

IQ

Quiescent current

VEN = 1.15 V, IOUT = 30 mA

29

50

µA

VEN = 0.4 V

0.003

1.5

ISC

Short-circuit current limit

See(4)

90

mA

ƒ = 1 kHz, IOUT = 30 mA

40

PSRR

Power Supply Rejection Ratio

dB

ƒ = 20 kHz, IOUT = 30 mA

30

EEN

Output noise voltage(3)

BW = 10 Hz to 100 kHz, VIN = 4.2 V

300

µVRMS

Thermal shutdown temperature

160

TSHUTDOWN

°C

Thermal shutdown hysteresis

20

ENABLE CONTROL CHARACTERISTICS

Maximum input current at EN

IEN

VEN = 0 V and VIN = 5.2 V

0.001

µA

input

VIL

Low input threshold

VIN = 1.8 V to 5.2 V

0.4

V

VIH

High input threshold

VIN = 1.8 V to 5.2 V

1.15

V

Line transient response |

δVOUT|

Trise = Tfall = 10 µS

(3)

60

Transient

mV

Trise = Tfall = 1 µS

response

Load transient response |

δVOUT|

60

IOUT = 100 µA to 5 mA

(3)

(1)

All limits are ensured. All electrical characteristics having room-temperature limits are tested during production at TJ = 25°C or correlated

using Statistical Quality Control methods. Operation over the temperature specification is specified by correlating the electrical

characteristics to process and temperature variations and applying statistical process control.

(2)

The device maintains the regulated output voltage without the load.

(3)

This electrical specification is specified by design.

(4)

Short-circuit current is measured on the input supply line at the point when the short-circuit condition reduces the output voltage to 95%

of its nominal value.

6.6 Timing Requirements

MIN

NOM

MAX

UNIT

tON1

Turnon time(1), 50% to 85% of VOUT(NOM)

(2)

15

µs

tON2

Turnon time(1) to 95% level(3)

40

µs

tOFF1

Turnoff time(1), 85% to 50% of VOUT(NOM)

(4)

µs

tOFF2

Turnoff time(1), 95% to 5% level(5)

40

15

µs

(1)

This electrical specification is ensured by design.

(2)

Time for VOUT to rise from 50% to 85% of VOUT(NOM) (Figure 1).

(3)

Time from VEN = 1.15 V to VOUT = 95% (VOUT(NOM)) (Figure 1).

(4)

Time for VOUT to fall from 85% to 50% of VOUT(NOM) (Figure 1).

(5)

Time from VEN = 0.4 V to VOUT = 5% (VOUT(NOM) (Figure 1).

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