LNBH25 datasheet(25/34 Pages) STMICROELECTRONICS

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LNBH25

Electrical characteristics

Doc ID 022433 Rev 4

25/34

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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

FDETIN

Tone detector frequency

capture range (3)

0.4VPP sine wave

kHz

VDETIN

Tone detector input

amplitude (3)

Sine wave signal, 22 kHz

0.3

1.5

VPP

ZDETIN

Tone detector input

impedance

150

VOL_BPS

BPSW pin low voltage

IOL_BPSW = 5 mA, DSQIN = high,

EXTM=0, TEN=1

0.7

VOL

DSQOUT, FLT pins logic

LOW

DETIN Tone present, IOL= 2 mA

0.3

0.5

IOZ

DSQOUT, FLT pins leakage

current

DETIN Tone absent, VOH = 6 V

µA

IOBK

Output backward current

All VSELx=0, VOBK = 30 V

-3

-6

ISINK

Output low-side sink current

VOUT forced at VOUT_NOM + 0.1 V

ISINK_

TIME-OUT

Low-side sink current time-

out

VOUT forced at VOUT_NOM + 0.1 V

PDO I²C bit is set to 1 after this time

is elapsed

IREV

Max. reverse current

VOUT forced at VOUT_NOM + 0.1 V

after PDO bit is set to 1

(ISINK_TIME-OUT elapsed)

2mA

TSHDN

Thermal shut-down

threshold

150

°C

ΔTSHDN

Thermal shut-down

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.

Frequency range in which the DETIN function is guaranteed. The VPP level is intended on the LNB bus (before the C6

capacitor. See typical application circuit for DiSEqC 2.x). IOUT from 0 to 750 mA, CBUS from 0 to 750 nF.

Table 13.

Electrical characteristics (continued)

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