L6740L datasheet(14/44 Pages) STMICROELECTRONICS

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Electrical specifications

L6740L

14/44

PSI_L

Voltage Low

ISINK = -5mA

250

Voltage positioning (CORE and NB Section)

CORE

Output voltage accuracy

VSEN to VCORE; FBG to GNDCORE

-8

NBVSEN to VNB; NBFBG to GNDFB

-10

OS, NB_OS

OFFSET bias voltage

IOS = 0 to 250µA

1.190

1.24

1.290

OFFSET current range

250

µA

OFFSET - IFB accuracy

IOS = 0 to 250µA

-15

DROOP

DROOP accuracy

IDROOP = 0 to 140µA; OS = OFF

-9

µA

NB_DROOP

INB_DROOP = 0 to 35µA; OS = OFF

-4

µA

EA DC gain

100

Slew rate

COMP, NB_COMP to SGND = 10pF

µs

PWM outputs (CORE and NB Section)

PWMx,

NB_PWM

Output high

I = 1mA

3.6

Output low

I = -1mA

0.2

IPWMx

Test current

µA

ENDRV,

NB_ENDRV

Output low

I = -5mA

0.4

Protections

OVP

Over voltage protection

V_FIX Mode (V_FIX = SGND);

VSEN, NB_VSEN Rising

1.720

1.800

1.880

Bias current

µA

OV programmability

ROVP = 180kΩ

1.730

1.800

1.870

UVP

Under voltage protection

VSEN, NB_VSEN Falling; wrt Ref.

-470

-400

-330

PWRGOOD

PGOOD threshold

VSEN, NB_VSEN Falling; wrt Ref

-300

-250

-200

Voltage low

IPWRGOOD = -4mA

0.4

IVSEN-DISC

VSEN disconnection

Sourced from NB_VSEN; OS = OFF

µA

Sunk from VSEN; OS = OFF

µA

VFB-DISC

FB disconnection

CORE - VCS- Rising, above VSEN

500

600

700

FBG DISC

FBG disconnection

EA NI input wrt VID

350

450

550

OC_PHASE Per-phase OC

CORE section; bias voltage

1.200

1.240

1.280

kVOC_AVGTH

Average OC

CORE section

2.430

2.500

2.570

kIOC_AVGTH

IDROOP = 0 to 140µA; OS = OFF

-11

µA

IOCTH_NB

OC threshold

NB section

37.5

µA

Table 5.

Electrical characteristics (continued)

(VCC=12V±15%, TJ = 0°C to 70°C unless otherwise specified).

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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