RT4801HWSC Richtek

RT4801H Dual Output LCD Bias for Smartphones and Tablets General Description Features 2.5V to 5.5V Supply Voltage Range The RT4801H is a highly integrated Boost and LDO Up to 90% Efficiency with Small Magnetics and inverting charge pump to generate positive and Support Up to 80mA Output Current negative output voltage. The output voltages can be 2 Low 1A Shutdown Current adjusted from 4V to 6V with 100mV steps by I C Internal Soft-start Function interface protocols. With its input voltage range of 2.5V Short Circuit Protection Function to 5.5V, RT4801H is optimized for products powered by Over-Voltage Protection Function single-cell batteries and symmetrical output currents up Over-Current Protection Function to 80mA. The RT4801H is available in the WL-CSP- Over-Temperature Protection Function 15B 1.31x2.07 (BSC) package. Elastic Positive and Negative Voltage On/Off Ordering Information Control by ENP/ENN Voltage Output from 4V to 6V per 0.1V RT4801H Low Input Noise and EMI Package Type Output with Programmable Fast Discharge when WSC : WL-CSP-15B 1.31x2.07 (BSC) IC Shutdown Note : 2 Adjustable Output Voltage by I C Compatible Richtek products are : Interface RoHS compliant and compatible with the current Available in the 15-Ball WL-CSP Package requirements of IPC/JEDEC J-STD-020. Applications Suitable for use in SnPb or Pb-free soldering processes. TFT-LCD Smartphones TFT-LCD Tablets General Dual Power Supply Applications Simplified Application Circuit L1 LXP RT4801H V IN VIN VOP V OP C IN C OP ENP VON V ON C ON ENN BST SCL C BST SDA CF1 C F1 GND PGND CF2 Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS4801H-00 May 2016 www.richtek.com 1 RT4801H Pin Configurations Marking Information 49 : Product Code (TOP VIEW) W : Date Code 49W A1 A2 A3 ENN CF2 VON ENP B1 B2 B3 PGND SCL VIN C1 C2 C3 CF1 SDA LXP D1 D2 D3 BST GND PGND E1 E2 E3 VOP BST WL-CSP-15B 1.31x2.07 (BSC) Functional Pin Description Pin No. Pin Name Pin Function A1 ENN Enable Control Input for VON. A2 VON Negative Terminal Output. A3 CF2 Negative Charge Pump Flying Capacitor Pin. B1 ENP Enable Control Input for VOP. 2 B2 SCL Clock of I C. B3, E1 PGND Power Ground. C1 VIN Power Input. 2 C2 SDA Data of I C. C3 CF1 Negative Charge Pump Flying Capacitor Pin. D1 LXP Switching Node of Boost Converter. Ground. The exposed pad must be soldered to a large PCB and connected to D2 GND GND for maximum power dissipation. D3, E2 BST Output Voltage of Boost Converter. E3 VOP Positive Terminal Output. Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS4801H-00 May 2016 2