L9680 datasheet(244/277 Pages) STMICROELECTRONICS

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Electrical characteristics

L9680

244/277

DocID029257 Rev 1

16.13

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

Table 47. 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

3IO_SATBCK_VH_IH

SATBUCK output

current

SAT_V =0

LOW_POWER_MODE = 0

450

4IO_ SATBCK _VH_IL

SAT_V =0

LOW_POWER_MODE = 1

300

5IO_ SATBCK _VL_IH

SAT_V =1

LOW_POWER_MODE = 0

390

6IO_ SATBCK _VL_IL

SAT_V =1

LOW_POWER_MODE = 1

240

7dVSR_ac

Line transient

response

All line, load; dt=100 μs;

SAT_V = 0/1

Design Info

-4%

8dVLR_ac

Load transient

response

All line, load; dt=100 μs;

SAT_V = 0/1

Design Info

-4%

9RDSON_SATBCK_HS

High side power

switch resistance

0.6

RDSON_SATBCK_LS

Low side power

switch resistance

0.6

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

IOCP_LS_SATBCK_LO Low side positive

over current

detection

VSATBCKSW ≥ 0

VSYNCBST < VSYNCBST_RESTART_TH

100

IOCP_LS_SATBCK_HI

VSATBCKSW ≥ 0

FAST SLOPE

100

240

350

IOCN_LS_SATBCK_HI Low side negative

over current

detection

VSATBCKSW = 0

LOW_POWER_MODE = 0

0.94

1.25

1.56

IOCN_LS_SATBCK_LO

VSATBCKSW = 0

LOW_POWER_MODE = 1

0.64

0.85

1.06

VSATBCK_OK_LOW

SATBUCK voltage

threshold

SYS_CTL(SAT_V) = 0

6.2

6.5

6.8

VSATBCK_OK_HIGH

SYS_CTL(SAT_V) = 1

7.7

8.1

8.5

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