L6986ITR datasheet(5/60 Pages) STMICROELECTRONICS

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Electrical characteristics

Table 5. Electrical characteristics (TJ = 25 °C, VIN = 12 V unless otherwise specified).

Symbol

Parameter

Test condition

Min.

Typ.

Max

Unit

VIN

Operating input voltage range

VIN_H

VCC UVLO rising threshold

2.7

3.5

VIN_L

VCC UVLO falling threshold

2.4

3.5

IPK

Peak current limit

Duty cycle < 20%

2.55

Duty cycle = 100% closed loop

operation

2.1

IVY

Valley current limit

2.7

IVY_SNK

Reverse current limit

1.285

1.9

2.61

RDS(on)HS

High-side RDSON

ISW = 1 A

0.18

0.36

RDS(on)LS

Low-side RDSON

ISW = 1 A

0.15

0.30

fSW

Selected switching frequency

FSW pin strapping before SS

See Table 6

IFSW

FSW biasing current

SS ended

500

IMLF

MLF biasing current

SS ended

500

Duty cycle (1)

100

TON MIN

Minimum on-time

281

330

383

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

Power consumption

ISHTDWN

Shutdown current from VIN

VSS / INH = GND

μA

Q OPVIN

Quiescent current from VIN

SWO

VFB = GND (NO SLEEP) VBIAS = 3.3 V

0.5

1.5

NO SWO

VFB = GND (NO SLEEP) VBIAS = GND

2.8

IQ OPVBIAS

Quiescent current from VBIAS

SWO

VFB = GND (NO SLEEP) VBIAS = 3.3 V

0.5

1.2

Soft-start

VINH

VSS threshold

SS rising

200

460

700

VINH HYST

VSS hysteresis

140

ISS CH

CSS charging current

VSS < VINH or

t < TSS SETUP or VEA + > VFB (1)

μA

t > TSS SETUP and VEA + < VFB (1)

L6986I

Electrical characteristics

DS13647 - Rev 2

page 5/60

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