ISL97642
TFT-LCD DC/DC with Integrated Amplifiers

Key Features

• Current mode boost regulator
• Fast transient response
• 1% accurate output voltage
• 18V/2.4A integrated FET
• >90% efficiency
• 2.6V to 5.5V VIN supply
• 2 LDO controllers for V_ON and V_OFF
• 2% output regulation
• V_ON-slice circuit
• High speed amplifiers
• 150mA short-circuit output current
• 12V/µs slew rate
• 12MHz -3dB bandwidth
• Rail-to-rail inputs and outputs
• Built-in power sequencing
• Internal soft-start
• Multiple overload protection
• Thermal shutdown
• 32 Ld 5x5 thin QFN package
• Pb-free plus anneal available (RoHS compliant)

Description

The ISL97642 integrates a high performance boost regulator with 2 LDO controllers for V_ON and V_OFF, a V_ON-slice circuit with adjustable delay and three amplifiers for VCOM and VGAMMA applications.

The boost converter in the ISL97642 is a current mode PWM type integrating an 18V N-Channel MOSFET.

Using external low-cost transistors, the LDO controllers provide tight regulation for V_ON, V_OFF, as well as providing start-up sequence control and fault protection.

The amplifiers are ideal for VCOM and VGAMMA applications, with 150mA peak output current drive, 12MHz bandwidth, and 12V/µs slew rate. All inputs and outputs are rail-to-rail.

Available in the 32 Ld thin QFN (5mmx5mm) Pb-free package, the ISL97642 is specified for operation over the -40°C to +85°C temperature range.

Applications

• TFT-LCD panels
• LCD monitors
• Notebooks
• LCD-TVs