G5168F11U 致新650mA LNB电源和控制调节器

　　General Description

　　Intended for analog and digital satellite receivers/sat-TV, sat-OC cards, the G5168 is a monolithic voltage regulator and interface IC, packaged in SOP-8 (FD), specifically designed to provide the 14V/19V power supplywith high efficiency and the 22KHz EXTM signaling tothe LNB down-converter in the antenna dish or to the multi-switch box.

　　G5168 consists of a BOOST converter and a low-noise linear regulator along with the circuitry required for EXTM injection and pin controllable interface.

　　The device makes the total LNB supply design simple, efficient and compact with low external component count.

　　The external modulation input (EXTM pin) can accept a tone modulated DiSEqC command and transfer it symmetrically to the output to meet DiSEqC 1.x protocol.

　　Features

　　► Low noise output to avoid sensitivity of can Tuner and DISH’s LNA dropping down

　　► Noise < +/-80mV @350MHz BWL

　　► Noise < +/-50mV @350MHz BWL

　　► Single chip solution on 650m Vpp 22KHz EXTM with 10μs Trise/Tfall for less Transferring noise

　　► LNB Voltages (2 levels: 14V and 19V) compatible with common standards, Push-pull output stage minimizes 14V -> 19V and 19V -> 14V output transition times

　　► External 22KHz EXTM input

　　► Integrated DC/DC BOOST converter and high efficiency (typ. 90%)

　　► High Frequency for Small Component Size

　　► Integrated low Noise Linear Regulator

　　► 5.0V, 3.3V, 2.5V, 1.8V, 1.2 and 1.05V logic compatible

　　► Internal Short, OCP, OTP, protection

　　Applications

　　► LNB Power supply For DVB-S/S2/ABS

　　► Digital STB

　　► Satellite TV cards