TPS65235-1 LNB Voltage Regulator With I2C Interface

1 Features

Complete integrated solution for LNB and I²C interface
DiSEqC 2.x, and DiSEqC 1.x compatible
Supports 5-V, 12-V, and 15-V power rail
Up to 1000-mA accurate output current limit adjustable by external resistor
Boost switch peak current limit proportional to LDO current limit
Boost converter with 140-mΩ low R_ds(on) internal power switch
Boost switching frequency 1-MHz or 500-kHz selectable
Audible noise avoided at force PWM mode
Dedicated enable pin for non-I²C application
Low-dropout (LDO) regulator with push-pull output stage for VLNB output
Built-in accurate 22-kHz tone generator and external tone input support
Supports both external 44-kHz and 22-kHz tone input
Adjustable soft start and 13-V to 18-V voltage transition time
650-mV to 750-mV 22-kHz tone amplitude selection
I²C registers accessible with EN low
Short circuit dynamic protection
Diagnostics for output voltage level, DiSEqC tone input and output, current level, and cable connection
Thermal protection available
20-pin WQFN 3-mm × 3-mm (RUK) package