L9779WD-SPI datasheet(42/141 Pages) STMICROELECTRONICS

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Functional description

L9779WD-SPI

42/141

DocID027721 Rev 2

Table 15. Linear 3.3 V regulator electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

V3V3

Output voltage 3.3 V

IV3V3 = 5-100 mA

VB = 6-18 V

3.23

3.3

3.36

V3V3

Output voltage 3.3 V

Square wave on V3V3,

IV3V3=

±20 mA; f0 = 5 kHz; tr = tf = 0.5µs;

within the output current range

3.2

3.3

3.36

Srpower-up5

Output voltage slew

rate at power-up

IV3V3 = 12.5 mA

Cout = 4.7 µF

412

V/ms

V3V3

IV3V3_MAX

Output current limitation

V3V3

V3V3 = 3 V

VB = 6-18 V

200

500

Vline_3

Line regulation voltage

IV3V3 = 5-100 mA

6V < VB < 18 V

Vload_3

Load regulation voltage

IV3V3 = 5-100 mA

6V < VB < 18 V

V3V3Drift

Total output 3V3

voltage drift

Cout = 4.7 µF (parameter

validated by reliability test)

100

SVRV3V3

Supply voltage 3.3 V

rejection

Cout = 4.7 µF;

4 Vpp, VB mean 9 V, f = 20 kHz

Vdrop_out

VDD5 = 3.3 V; IV3V3 =100 mA

200

V3V3_OS

Max overshoot at

switch on

3.45

Max overshoot exiting

from cranking*1

Not tested, it is guaranteed by

design

3.45

TD_Start_V3V

Delay between VDD5>

VDD_UV_high and

V3V3 switch on

Tested by scan

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