ISL78022

Features:

`Current mode boost regulator
-Fast transient response
-1% accurate output voltage
-18V/3A integrated FET
->90% efficiency
`2.6V to 5.5V V_INsupply
`2 LDO controllers for V<sub>ON</sub>and V<sub>OFF</sub>
-2% output regulation
-V<sub>ON</sub>-slice circuit
`High speed amplifiers
-150mA short-circuit output current
-12V/ s slew rat
-12MHz -3dB bandwidth
-Rail-to-rail inputs and outputs
`Built-in power sequencing
`Internal soft-start
`Multiple overload protection
`Thermal shutdown
`32 Ld 7x7 TQFP package
`Pb-free (RoHS compliant)




Application

All automotive TFT-LCD panels




Pinout






Specifications

IN, CTL to AGND	-0.3V to +6.5V
COMP, FB, FBP, FBN, DEL, REF to AGND	-0.3V to VIN + 0.3V
PGND, BGND to AGND	±0.3
LX to PGND	-0.3V to +24V
SUP to AGND	-0.3V to +18V
DRVP, SRC to AGND	-0.3V to +36V
POS1, NEG1, OUT1, POS2, NEG2, OUT2, POS3, OUT3,
POS4, NEG4, OUT4, POS5, OUT5 to AGND	-0.3V to VSUP + 0.3V
DRVN to AGND	VIN -20V to V +0.3VIN

Description

The ISL78020 and ISL78022 integrate a high performance boost regulator with 2 LDO controllers for VON and VOFF, a VON-slice circuit with adjustable delay and either one (ISL78020) or five (ISL78022) amplifiers for VCOM and VGAMMA applications. The boost converter in the ISL78020 and ISL78022 is a current mode PWM type integrating an 18V N-Channel MOSFET. Operating at 1.2MHz, this boost converter can operate in either P-Mode for superior transient response, or in PI-Mode for tighter output regulation. Using external low-cost transistors, the LDO controllers provide tight regulation for VON, VOFF, 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/s slew rate. All inputs and outputs are rail-to-rail. Available in a 32 Ld TQFP (7mmx7mm) Pb-free package, the ISL78020, ISL78022 are specified for operation over a -40C to +105C temperature range.