Microchip 19-Channel I/O Expander Serial-SPI 28-Pin SSOP, MTCH652-I/SS

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.

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

Human Machine Interface (HMI), Microchip