LNBH25 datasheet(27/34 Pages) STMICROELECTRONICS

27 / 34 page

LNBH25

Electrical characteristics

Doc ID 022433 Rev 4

27/34

TJ from 0 to 85 °C, VI = 12 V.

Refer to

Section 5, TJ from 0 to 85°C, All DATA 1..4 register bits set to “0”, RSEL = 11.5 kΩ,

DSQIN = LOW, VIN = 12 V, IOUT = 50 mA, unless otherwise stated. Typical values are

referred to TJ = 25 °C. VOUT = VOUT pin voltage. See software description section for I²C

access to the system register.

Note:

If the output voltage is lower than the min. value the VMON I²C bit is set to 1.

If VMON=0 then VOUT > 80 % of VOUT typical

If VMON=1 then VOUT < 95 % of VOUT typical

Refer to

Section 5, TJ from 0 to 85 °C, RSEL = 11.5 kΩ, DSQIN = LOW, VIN = 12 V, unless

otherwise stated. Typical values are referred to TJ = 25 °C. VOUT = VOUT pin voltage. See

software description section for I²C access to the system register.

Note:

If the output current is lower than the min. threshold limit, the IMON I²C bit is set to 1. If the

output current is higher than the max. threshold limit, the IMON I²C bit is set to 0.

Table 16.

Address pin characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VADDR-1

“0001000(R/W)” Address pin

voltage range

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

00.8

VADDR-2

“0001001(R/W)” Address pin

voltage range

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

Table 17.

Output voltage diagnostic (VMON bit, STATUS 1 register) characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VTH-L

Diagnostic low threshold at

VOUT = 13.0 V

VSEL1=1,

VSEL2 = VSEL3 = VSEL4 = 0

VTH-L

Diagnostic low threshold at

VOUT = 18.15 V

VSEL4=1,

VSEL1 = VSEL2 = VSEL3 = 0

Table 18.

Output current diagnostic (IMON bit, STATUS 2 register) characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

ITH

Minimum current diagnostic

threshold

EN_IMON = 1 (VOUT is set to 21 V typ.)

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