The ISL24202 is an 8-bit programmable current sink that can be

used in conjunction with an external voltage divider to generate a

voltage source (VCOM) positioned between the analog supply

voltage and ground. The current sink’s full-scale range is

controlled by an external resistor, RSET. With the appropriate

choice of external resistors R1 and R2, the VCOM voltage range

can be controlled between any arbitrary voltage range. The

ISL24202 has an 8-bit data register and 8-bit EEPROM for storing

both a volatile and a permanent value for its output, accessible

through a single up/down counter interface pin (CTL). After the

part is programmed with the desired VCOM value, the Counter

Enable pin (CE) can be grounded to prevent further changes. On

every power-up the EEPROM contents are automatically

transferred to the data register, and the pre-programmed output

voltage appears at the VOUT pin.

The ISL24202 can be used with a high output drive buffer

amplifier, which allows it to directly drive the VCOM input of an

LCD panel.

The ISL24202 is available in an 8 Ld 3mm x 3mm TDFN

package. This package has a maximum height of 0.8mm for very

low profile designs. The ambient operating temperature range is

-40°C to +85°C.

Features

• Adjustable 8-Bit, 256-Step, Current Sink Output

• On-Chip 8-Bit EEPROM

• Up/Down Counter Interface

• Guaranteed Monotonic Over-Temperature

• 4.5V to 19.0V Analog Supply Range for Normal Operation

(10.8V Minimum Analog Supply Voltage for Programming)

• 2.25V to 3.6V Logic Supply Voltage Operating Range

• Pb-free (RoHS-Compliant)

• Ultra-Thin 8 Ld TDFN (3 x 3 x 0.8mm Max)

Applications

• LCD Panel VCOM Generator

• Electrophoretic Display VCOM Generator