Features

• MTCH652 Capacitive Touch Line Driver. The Microchip MTCH652 is a Driver IC designed to drive High-Voltage Outputs in Capacitive Touch applications. The MTCH652 combines a Boost Converter with 19 Level Shifters to drive up to 19 channels. The device is programmable via a Configuration (CONFIG) registers. The CONFIG register can be altered during device operation via a SPI interface to select the desired voltage output. Soft Start can also be tailored to limit initial in-rush currents to prevent system brown-outs. In a typical application the MTCH652 requires only a SPI interface, Latch Enable Input, PWM Input, two Capacitors and a small Inductor. Features. 19 High-Voltage I/O Lines Built-in Boost Converter Internal Switch 1.8 V to 5.5 V Input Operating Range Low Quiescent Current: <200 μA Low Shutdown Current: 1.5 μA, typical Up to 50 mA Output Current @ VIN : 3.6 V and VOUT : 12 V Driven by an External PWM Driven Boost for Greater Boost Flexibility Selectable Output Voltage Range: 6 V, 8 V, 10 V, 12 V, 14 V, 16 V and 18 V Selectable Current Limiting Selectable Soft Start High-Speed SPI Interface: 1 MHz max. Output Enable (OE) Independent of SPI Interface Built-in Discharge Circuit