Preliminary data

This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change

without notice.

November 2008

Rev 1

1/21

21

LNBP8L - LNBP9L

LNBP10L - LNBP11L

LNB supply and control voltage regulator

Features

supply and control

dissipation (DFN package)

the output voltage level through a single pin

(LNBP9L/11L versions)

(LNBP8L/10L versions)

(LNBP10L, LNBP11L versions)

protection (LNBP10L, LNBP11L versions)

packages

Description

Intended for analog and digital satellite receivers,

the LNBP is a monolithic linear voltage regulator,

assembled in the DFN8 5x6 and IPPAK packages,

specifically designed to provide the powering

voltages and the interfacing signals to the LNB

down-converter. The regulator output can be logic

controlled for 13 V or 18 V (typ.) by means of the

EN/VSEL 3-state pin for remotely controlling the

LNB. When the IC is powered and put in standby

(EN/VSEL pin at high impedance), the regulator

output is disabled. In order to reduce power

dissipation, the LNBP10L/11L versions (on DFN

These pins must be powered, respectively, at 15

V (min.) and 22 V (min.), and an internal switch

will automatically select the appropriate supply

voltage according to the selected output voltage.

The LNBP8L/9L versions (in the IPPAK package)

have only one supply input pin, which must be

supplied at 22 V (min.). Additionally, the

LNBP10L/11L versions have the LLC pin to

increment the selected output voltage value by 1

V (typ.) to compensate for the excess voltage

drop along the coaxial cable (LLC pin HIGH).

An analog 22 kHz modulation input pin (EXTM) is

available in the LNBP8L and LNBP10L versions.

An appropriate DC blocking capacitor must be

used to couple the modulating signal source to

the EXTM pin. The LNBP10L/11L versions are

also equipped with over-current dynamic

protection: as soon as an overload is detected the

determined by the capacitor connected between

the CEXT pin and GND. After the time has

dynamic operation can greatly reduce the power

dissipation in short-circuit condition, while

ensuring excellent power-on startup even with

highly capacitive loads on the LNB outputs.

The device is packaged in the IPPAK for through-

hole mounting and in the DFN8 5x6 for surface

mounting. Both package solutions are offered in

two versions: with ten pins (LNBP9L/11L) to use

with the integrated 22 kHz tone generator, or with

the EXTM pin (LNBP8L/10L) to use external 22

kHz sources. All versions have built-in thermal

protection to prevent overheating damage.

DFN8 (5 x 6 mm)

IPPAK

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