STMicroelectronics LNBH29PTR

Description
The LNBH29 series is a monolithic voltage regulator and interface IC designed for analog and digital satellite receivers/Sat-TV and Sat-PC cards. It provides a complete solution for powering and controlling LNB down-converters in antenna dishes or multi-switch boxes. The IC features a low component count, low power dissipation, and simple design with IPC standard interfacing.

Features
QFN16 (3x3) or QFN16 (4x4) packaging
Complete interface between LNB and IPC bus
Built-in DC-DC converter for single 12 V supply operation with high efficiency (typ. 93% @ 0.5 A)
Selectable output current limit by external resistor
Compliant with main satellite receiver output voltage specifications
Accurate built-in 22 kHz tone generator suits widely accepted standards
EXTM pin (LNBH29E) for auxiliary 22 kHz modulation input
22 kHz tone waveform integrity guaranteed even at no load condition
Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS for low power losses
Overload and overtemperature internal protection with PPC diagnostic bits
LNB short-circuit dynamic protection
/- 4 kV ESD tolerance on output power pins

Applications
STB satellite receivers
TV satellite receivers
PC card satellite receivers