L9679P datasheet(234/272 Pages) STMICROELECTRONICS

234 / 272 page

Electrical characteristics

L9679P

234/272

DocID029275 Rev 1

17.11

COVRACT

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

-40 °C

 Ta  +95 °C, VINGOOD0  VIN  35 V; VINGOOD(max)  VIN  35 V;

VCCx(min)

 VCCx  VCCx(max); VCC = 3.3 V or 5 V

17.12

SYNCBOOST converter

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

-40 °C

 Ta  +95 °C, VINGOOD0  VIN  VINSYNC_DIS_X(min)

2TFLT_TSD_ERSW Thermal shutdown filter time -

μs

3TBLK_ERSW

ER switch activation

blanking time after thermal

shutdown

Table 41. ER Switch AC specifications (continued)

Symbol

Parameter

Conditions

Min

Max

Unit

Table 42. COVRACT DC specifications

Symbol

Parameter

Conditions

Min

Typ

Max Unit

VOH_COVRACT

COVRACT output voltage

ILOAD = -0.5 mA

VCC

-0.6

VCC

2VOL_COVRACT

ILOAD = 2.0 mA

0.4

3IREV_COVRACT

Reverse current short high

voltage

COVRACT = 40 V

VCC = 3.3 V

Table 43. COVRACT AC specifications

Symbol

Parameter

Conditions

Min

Typ

Max Unit

1TRISE_COVRACT Rise time

50 pF load, 20%-80%

1.00

μs

2TFALL_COVRACT Fall time

50 pF load, 20%-80%

1.00

μs

Table 44. SYNCBOOST converter DC specifications

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VO_SYNCBST

SYNCBOOST output

voltage

Across all line and load,

steady state

SYS_CTL(SYBST) = 0

11.40

Across all line and load

(steady state)

SYS_CTL(SYBST) = 1

14.00 14.75

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