ISL78419ARZ-T7A

DATASHEET ISL78419 FN8292 Rev 3.00 Integrated Automotive TFT-LCD Power Supply Regulator June 27, 2014 The ISL78419 is an integrated power management IC (PMIC) for Features TFT-LCDs used in central display, rear seat entertainment and 2.5V to 5.5V input virtual dashboards. The device integrates a boost converter for generating AV , an LDO regulator for V . V and V are DD LOGIC ON OFF 1.5A, 0.18 integrated boost FET generated by a charge pump driven by the switch node of the V /V supplies generated by charge pumps driven by the ON OFF boost converter. The ISL78419 also includes a V slice circuit, ON boost switch node reset function, and a high performance VCOM amplifier with a LDO for V channel Digitally Controlled Potentiometer (DCP) that is used as a VCOM LOGIC calibrator. 600kHz/1200kHz selectable switching frequency The AV boost converter features a 1.5A/0.18boost FET with Integrated gate pulse modulator DD 600kHz/1200kHz switching frequency. Reset signal generated by supply monitor The integrated logic LDO includes a 350mA FET for driving the low Integrated VCOM amplifier voltage needed by external digital circuitry. DCP 2 The gate pulse modulator can control the gate voltage up to 30V, -I C serial interface, address: 0101000, MSB left and both the rate and slew delay times are selectable. - Wiper position stored in 8-bit nonvolatile memory and recalled on power-up The supply monitor generates a reset signal when the system is powered down based on a user selected threshold level - Endurance, 1,000 data changes per bit (programming resistor). UVLO, UVP, OVP, OCP, and OTP protection The ISL78419 provides a digitally controlled VCOM output using Pb-free (RoHS compliant) 2 I C interface. One VCOM amplifier is also integrated in the chip to 28 Ld 4x5 QFN provide a fast slewing 150mA drive (sourcing or sinking). The output of the VCOM is powered up with the voltage stored at the AEC-Q100 qualified last programmed 8-bit (internal) EEPROM setting. Applications The ISL78419 is rated to operate over the temperature range Automotive TFT displays of (-40C to +105C) and is qualified according to AEC-Q100. - Central displays, rear seat entertainment and dashboards Pin Configuration ISL78419 (28 LD 4x5 QFN) TOP VIEW 28 27 26 25 24 23 FB L IN 1 22 PGND 2 21 CD2 CE L OUT 3 20 RE RESET 4 19 GND THERMAL VGH 5 18 ADJ PAD VGHM 6 17 VDIV VFLK 7 16 NEG VDPM 15 8 VOUT 9 101112 13 14 FN8292 Rev 3.00 Page 1 of 20 June 27, 2014 GPM LO EN AVDD LX SCL VIN SDA FREQ POS COMP RSET SSISL78419 Table of Contents Application Diagram . 3 Ordering Information 4 Absolute Maximum Ratings . 5 Thermal Information . 5 Recommended Operating Conditions 5 Electrical Specifications . 5 Serial Interface Specifications 7 Typical Performance Curves 9 Applications Information 11 Enable Control 11 Frequency Selection . 11 Soft-Start . 11 Operation 11 Capacitor . 11 Inductor 11 Rectifier Diode 11 Output Capacitor 12 Compensation 12 Linear Regulator (LDO) . 12 Supply Monitor Circuit 12 Gate Pulse Modulator Circuit 13 VCOM Amplifier . 13 DCP Memory Description . 13 2 I C Serial Interface 14 Protocol Conventions 14 Write Operation . 15 Data Protection . 15 Read Operation . 16 Communication with ISL78419 16 Register Description: Access Control . 16 Register Description: IVR and WR 16 Initial VCOM Setting 17 Start-up Sequence . 17 Layout Recommendation 17 Revision History 19 About Intersil 19 Package Outline Drawing 20 FN8292 Rev 3.00 Page 2 of 20 June 27, 2014