LNBH29 datasheet(21/31 Pages) STMICROELECTRONICS

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LNBH29

Electrical characteristics

TJ from 0 to 85 °C, VI = 12 V.

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Eff DC/DC

DC-DC converter efficiency

IOUT = 500 mA

FSW

DC-DC converter switching

frequency

440

kHz

UVLO

Undervoltage lockout

thresholds

UVLO threshold rising

4.8

UVLO threshold falling

4.7

VLP

Low power diagnostic (LPD)

thresholds

VLP threshold rising

7.2

VLP threshold falling

6.7

VIL

DSQIN, pin logic LOW

0.8

VIH

DSQIN, pin logic HIGH

IIH

DSQIN, pin input current

VIH = 5 V

µA

IOBK

Output backward current

All VSELx=0 V, VOBK=30 V

-3

-6mA

ISINK

Output low-side sink current

VOUT forced at VOUT_nom + 0.1 V

ISINK_TIME-

OUT

Low-side sink current timeout

VOUT forced at VOUT_nom + 0.1 V

PDO I²C bit is set to “1” after this time

has elapsed

IREV

Max. reverse current

VOUT forced at VOUT_nom + 0.1 V,

after PDO bit is set to “1”

(ISINK_TIME-OUT has elapsed)

2mA

TSHDN

Thermal shutdown threshold

150

°C

T

SHDN

Thermal shutdown hysteresis

°C

In applications where (VCC - VOUT) > 1.3 V, the increased power dissipation inside the integrated LDO must be taken into

account in the application thermal management design.

Guaranteed by design.

Only for type LNBH29E.

External signal maximum voltage for which the EXTM function is guaranteed.

Table 9. Electrical characteristic (continued)

Table 10. I²C electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VIL

Low level input voltage

SDA, SCL

0.8

VIH

High level input voltage

SDA, SCL

IIN

Input current

SDA, SCL, VIN = 0.4 to 4.5 V

-10

µA

VOL

Low level output voltage

SDA (open drain), IOL = 6 mA

0.6

FMAX

Maximum clock frequency

SCL

400

kHz

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