DATASHEET ISL98608IIH FN8724 Rev.2.00 High Efficiency Single Inductor Positive/Negative Power Supply Sep 26, 2017 The ISL98608IIH is a high efficiency power supply for small Features size displays, such as smart phones and tablets requiring Two outputs: supply rails. It integrates a boost regulator, LDO, and inverting charge pump that are used to generate two output rails: - VP = +5V (default) +5V (default) and -6 (default). The 5V output voltages can be - VN = -5V (default) 2 adjusted from 4.5V up to 7V with 50mV steps using the I C 2.5V to 5.5V input voltage range interface. 4.5 to 7V wide output range The device integrates synchronous rectification MOSFETs for Supports 200mA current between VP and VN the boost regulator and inverting charge pump, which maximizes conversion efficiency. >89% efficiency with 12mA load between VP and VN 2 The ISL98608IIH integrates all compensation and feedback 18mm solution PCB area components, which minimizes BOM count and reduces the Fully integrated FETs for synchronous rectification 2 solution PCB size to 18mm . Integrated compensation and feedback circuits The input voltage range, high efficiency operation and very low 2 I C adjustable output voltages and settings shutdown current make the device ideal for use in single cell Li-ion battery operated applications. Integrated VP/VN discharge resistors 1A shutdown supply current The ISL98608IIH is offered in a 1.744mm x1.744mm WLCSP package, and the device is specified for operation across the Programmable turn-on and turn-off sequencing -40C to +85C ambient temperature range. 1.744mm x1.744mm, 4x4 array WLCSP with 0.4mm pitch Applications TFT-LCD smart phone displays Small size/handheld displays Hi-Fi audio amplifier supply Typical Application Circuits VIN 2.5V TO 5.5V L 1 VIN C IN LXP SCL VBSTCP SDA VBST PROCESSOR ENP C VBST ENN CP C CP ISL98608IIH CN C VN -5V VN NEGATIVE SUPPLY VSUB LCD PANEL POSITIVE SUPPLY VP +5V AGND PGND C VP FIGURE 1. TYPICAL APPLICATION CIRCUIT: TFT-LCD SMART PHONE DISPLAY FN8724 Rev.2.00 Page 1 of 33 Sep 26, 2017ISL98608IIH Typical Application Circuits (Continued) VIN 2.5V TO 5.5V L 1 VIN C IN LXP SCL VBSTCP SDA VBST PROCESSOR ENP C VBST ENN CP ISL98608IIH C CP CN C VN NEGATIVE SUPPLY VN VSUB AMPLIFIER VP AGND PGND POSITIVE SUPPLY C VP FIGURE 2. TYPICAL APPLICATION CIRCUIT: HI-FI AUDIO AMPLIFIER POWER SUPPLY Block Diagram VIN LXP VIN VBSTCP CP VBST VBST OSCILLATOR PWM/ PFM VN LOGIC CN LOGIC PGND PGND CURRENT LIMIT VN UVP -60% UVP +60% COMP VREF VSUB GM COMP VREF GM SCL 2 DAC I C CONTROL SDA DAC ENP EN/ SEQUENCING VP LDO ENN SETTINGS DAC FIGURE 3. BLOCK DIAGRAM FN8724 Rev.2.00 Page 2 of 33 Sep 26, 2017