L9679P datasheet(241/279 Pages) STMICROELECTRONICS

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DS11627 Rev 7

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L9679P

Electrical characteristics

278

18.13

SATBUCK converter

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

-40 °C  Ta  +95 °C, VINGOOD0  VIN  35V, VSYNCBST_OK  SYNCBOOST

VFSTR

Steering diode forward

voltage

IF = 1 A

0.5

ILKGSTR

Steering diode reverse

leakage

Ta = 95 °C

Table 47. SYNCBOOST converter external components design info (continued)

Symbol

Component

Conditions

Min

Typ

Max

Unit

Table 48. SATBUCK converter DC specifications

Symbol

Parameter

Conditions

Min

Typ

Max Unit

VO_SATBCK

SATBUCK output

voltage

Across all line and load,

steady state SAT_V = 0

6.92

7.2

7.48

Across all line and load,

steady state SAT_V = 1

8.64

9.36

IO_SATBCK_VH_IH

SATBUCK output

current

SAT_V =0

LOW_POWER_MODE = 0

450

IO_ SATBCK _VH_IL

SAT_V =0

LOW_POWER_MODE = 1

300

IO_ SATBCK _VL_IH

SAT_V =1

LOW_POWER_MODE = 0

390

IO_ SATBCK _VL_IL

SAT_V =1

LOW_POWER_MODE = 1

240

dVSR_ac

Line transient

response

All line, load; dt=100 µs;

SAT_V = 0/1

Design Info

-4%

dVLR_ac

Load transient

response

All line, load; dt=100 µs;

SAT_V = 0/1

Design Info

-4%

RDSON_SATBCK_HS

High side power

switch resistance

SyncBoost = 12 V and 35 V

1.4

RDSON_SATBCK_LS

Low side power

switch resistance

SyncBoost = 12 V and 35 V

IOC_HS_SATBCK_HI High side over

current detection

LOW_POWER_MODE = 0

0.83

1.1

1.37

IOC_HS_SATBCK_LO

LOW_POWER_MODE = 1

0.53

0.7

0.9

13 IOCP_LS_SATBCK_LO Low side positive

over current

detection

VSATBCKSW ≥ 0

VSYNCBST < VSYNCBST_RESTART_TH

100

14 IOCP_LS_SATBCK_HI

VSATBCKSW ≥ 0

FAST SLOPE

100

240

350

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