L99ASC03 datasheet(35/73 Pages) STMICROELECTRONICS

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L99ASC03

Electrical specifications

ICMPH

Current comparator hysteresis

0.2

VDDFAIL

VDD fail threshold

VDD short to ground during

startup

1.8

2.2

tVDDFAIL

VDD short to ground detection

time

VDD short to ground during

startup

3.4

4.0

7.0

dVDD/dt

dVDD/dt at regulator turn-on

CCER = 680 nF; CELE =47 µF;

I(VDD) = 10 mA. Slope from

0.5 V to 1 V and slope from 1 V

to 0.9 * VDD.

If current limitation is reached,

the slope is controlled by the

current limitation and output

capacitor.

330

V/ms

VDDso,max

Maximum VDD output voltage

at regulator turn-on

CCER = 680 nF; CELE =47 µF;

I(VDD) = 10 mA. Internal soft-

start function

5.3

PSRR(1)

Power supply rejection ratio

(specified by design)

Vr = 0.5 Vpp; fr = 100 Hz;

CCER = 680 nF

Guaranteed by design.

Table 14. Voltage regulator VDD (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Table 15. NRES reset output (VDD supervision), NINT

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VRT1

VDD reset threshold 1

VDD increasing; VDD_VTH = 0

3.55

3.7

3.85

VDD decreasing; VDD_VTH = 0

3.15

3.3

3.45

VRT1H

VDD reset threshold 1

hysteresis

0.4

VRT2

VDD reset threshold 2

VDD increasing; VDD_VTH = 1

4.45

4.65

4.8

VVDD decreasing;

VDD_VTH =1

4.4

4.6

4.75

VRT2H

VDD reset threshold 2

hysteresis

0.06

VRESETL NRES pin low output voltage VDD >1 V; IRESET =1 mA

0.2

0.4

RRESET

NRES pull up internal

resistor

110

204

tRR

NRES reaction time

At ILOAD =1 mA

µs

tRP

NRES pulse time

1.7

3.5

tVDDoff

VDD turn-off time

200

tVDDUV VDD undervoltage filter time

µs

tNINT

NINT pulse time

µs

L99ASC03 Datasheet(PDF) 35 Page - STMicroelectronics

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