L9679P datasheet(245/279 Pages) STMICROELECTRONICS

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DS11627 Rev 7

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L9679P

Electrical characteristics

278

18.15

VSF regulator

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

-40 °C  Ta  +95 °C, VINGOOD0  VIN  35V, VSF + 2V  ERBOOST

Table 54. VSF regulator DC specifications

Symbol

Parameter

Conditions

Min Typ Max

Unit

VSF

Output voltage

All line, load, IO_VSF up to 6mA

SYS_CGF(VSF_V)= 0

All line, load, IO_VSF up to 6mA

Only in case

SYS_CTL(ER_BST_V)=1

SYS_CGF(VSF_V) = 1

ILIM_VSF

Output load current limit

VSF = 0

VDO_VSF

Drop-out voltage

V(ERBOOST-VSF)

CVSF

Output capacitance

Design Info

2.9

ILKG_VSF_OFF VSF input leakage

Device OFF

-5

µA

RPD_VSF

VSF pull-down resistance

Device ON

VSF regulator OFF; VSF = 25V

125

220

kΩ

IPD_VSF

VSF pull-down current

Device ON

VSF regulator ON; Design Info

µA

IPD_VSF_TOT VSF total pull-down current

Device ON

VSF regulator ON

VSF = 25V

SYS_CGF(VSF_V)= 1

147

230

462

µA

Table 55. VSF regulator AC specifications

Symbol

Parameter

Conditions

Min

Typ Max

Unit

TON_VSF

VSF turn on time

CVSF = 14 nF

Measured from VSF_EN=1 to

VSF inside regulation limits

100

µs

L9679P Datasheet(PDF) 245 Page - STMicroelectronics

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