L6986H datasheet(6/68 Pages) STMICROELECTRONICS

6 / 68 page

Electrical characteristics

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

Table 5. Electrical characteristics

Symbol

Parameter

Test conditions

Note

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

ISKIPH

Programmable skip

current limit

LCM, VSYNCH = GND

(1)

0.6

0.8

ISKIPL

LCM, VSYNCH = VCC

(2)

0.2

IVY_SNK

Reverse current limit

LNM or VOUT overvoltage

0.8

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 pinstrapping before

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. LNM/ LCM selection

(L6986H3V3), Table 8. LNM/ LCM selection

(L6986H5V) and Table 9. LNM/ LCM selection

(L6986H)

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

Power consumption

ISHTDWN

Shutdown current from

VIN

VSS/INH =GND

µA

L6986H

Electrical characteristics

DS12905 - Rev 2

page 6/68

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