L6985F datasheet(8/65 Pages) STMICROELECTRONICS

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Electrical characteristics

L6985F

8/65

DocID027836 Rev 2

Electrical characteristics

TJ = 25 °C, VIN = 12 V unless otherwise specified.

Table 5. Electrical characteristics

Symbol

Parameter

Test condition

Note Min.

Typ.

Max.

Unit

VIN

Operating input voltage

range

438

VINH

VCC UVLO rising threshold

2.7

3.5

VINL

VCC UVLO falling threshold

2.4

3.5

IPK

Peak current limit

Duty cycle < 20%

0.8

Duty cycle = 100%

closed loop operation

0.65

IVY

Valley current limit

0.9

ISKIP

Skip current limit

LCM, VSYNCH = GND

(1)

0.15

0.35

0.5

LCM, VSYNCH = VCC

(2)

0.1

IVY_SNK Reverse current limit

LNM or VOUT overvoltage

0.5

RDSON HS High-side RDSON

ISW = 0.5 A

0.36

0.72



RDSON LS Low-side RDSON

ISW = 0.5 A

0.15

0.30

fSW

Selected switching

frequency

FSW pinstrapping before SS

See Table 6: fSW selection

IFSW

FSW biasing current

SS ended

500

LCM/LNM

Low noise mode /

Low consumption mode

selection

MLF pinstrapping before SS

See Table 7 on page 11

IMLF

MLF biasing current

SS ended

500

Duty cycle

(2)

100

TON MIN Minimum On time

VCC regulator

VCC

LDO output voltage

VBIAS = GND (no switchover)

2.9

3.3

3.6

VBIAS = 5 V (switchover)

2.9

3.3

3.6

SWO

VBIAS threshold

(3 V< VBIAS < 5.5 V)

Switch internal supply from VIN to

VBIAS

2.85

3.2

Switch internal supply from VBIAS to

VIN

2.78

3.15

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