L9678P datasheet(186/215 Pages) STMICROELECTRONICS

186 / 215 page

Electrical characteristics

L9678P, L9678P-S

186/216

DS11626 Rev 9

16.13

VDD3V3 regulator

All electrical characteristics are valid for the following conditions unless otherwise noted.

-40 °C  Ta  +95 °C, VDD5(min)  VDD5.

Table 39. VDD3V3 regulator DC specifications

N°

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

VO_VDD3V3 Output voltage

Across all line and load, steady

state

3.2

3.3

3.4

IO_VDD3V3

Output load current

capability

0.5

125

IO_LIM_VDD3V3 Output load current limit -

150

dVSR_ac

Line transient response

All load IO_VDD3V3;

VIN = 6 V to 18 V @ dt = 1 µs;

Guaranteed by design

3.6

dVLR_ac

Load transient response

All line; IO_VDD3V3= 1mA to

100mA

@dt = 1 µs;

Guaranteed by design

3.6

VDD3V3OV Over-voltage threshold -

3.43

3.6

VDD3V3UV

Under voltage reset

threshold

3.17

Table 40. VDD3V3 regulator AC specifications

N°

Symbol

Parameter

Condition

Min. Typ. Max. Unit

TSOFTST_VDD3 Soft start time

From 10% to 90%

TFLT_VDD3OV

Over voltage

detection deglitch filter time

µs

TFLT_VDD3UV

Under voltage

detection deglitch filter time

µs

Table 41. VDD3V3 regulator external components (design info)

N°

Symbol

Parameter

Condition

Min. Typ. Max. Unit

CBLK_VDD3

Output bulk capacitance

Min 4.7µF nominal

µF

ESRCBLK_VDD3 Bulk capacitor ESR

mΩ

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