L6986 datasheet(10/68 Pages) STMICROELECTRONICS

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Electrical characteristics

L6986

10/68

DocID025376 Rev 7

Error amplifier gain

(2)

100

ICOMP

EA output current capability

±6

±12

±25

A

Inner current loop

gCS

Current sense transconductance

(VCOMP to inductor current gain)

Ipk = 1 A

(4)

2.5

A/V

Slope compensation

(4)

0.4

0.75

1.0

Overvoltage protection

VOVP

Overvoltage trip (VOVP/VREF)

1.15

1.2

1.25

VOVP HYST Overvoltage hysteresis

0.5

Synchronization (fan out: 6 slave devices typ.)

fSYN MIN

Synchronization frequency

LNM; fSW = VCC

266.5

kHz

VSYN TH

SYNCH input threshold

LNM, SYNCH rising

0.70

1.2

VSYN HYST SYNCH input threshold hysteresis LNM

ISYN

SYNCH pulldown current

LNM, VSYN = 1.2 V

0.7

VSYN OUT

high level output

LNM, 5 mA sinking load

1.40

low level output

LNM, 0.7 mA sourcing load

0.6

Reset

VTHR

Selected RST threshold

MLF pinstrapping before SS

see Table 7

VTHR HYST RST hysteresis

(2)

VRST

RST open collector output

VIN > VINH AND

VFB < VTH

4 mA sinking load

0.4

2 < VIN < VINH

4 mA sinking load

0.8

Delay

VTHD

RST open collector released as

soon as VDELAY > VTHD

VFB > VTHR

1.19

1.234 1.258

ID CH

CDELAY charging current

VFB > VTHR

A

Thermal shutdown

TSHDWN

Thermal shutdown temperature

(2)

165

C

THYS

Thermal shutdown hysteresis

(2)

1. Parameter tested in static condition during testing phase. Parameter value may change over dynamic application condition.

2. Not tested in production.

3. LCM enables SLEEP mode at light load.

4. Measured at fSW = 250 kHz.

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Note Min.

Typ.

Max. Unit

VPP gCS



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