RT4813C High Efficiency Boost Converter Features General Description CMCOT Topology and Small Output Ripple when The RT4813C allows systems to take advantage of VIN Close VOUT Voltage new battery chemistries that can supply significant Operates from a Single Li-ion Cell : 1.8V to 5.5V energy when the battery voltage is lower than the Adjustable Output Voltage : 1.8V to 5.5V required voltage for system power ICs. By combining PSM Operation built-in power transistors, synchronous rectification, Up to 96% Efficiency and low supply current this IC provides a compact Input Over-Current Limit solution for systems using advanced Li-Ion battery Input / Output Over-Voltage Protection chemistries. Programmable Average Output Current Limit The RT4813C is a boost regulator designed to provide Range : 3100mA to 550mA a minimum output voltage from a single-cell Li-Ion Internal Compensation battery, even when the battery voltage is below system Output Discharge minimum. In boost mode, output voltage regulation is Output Short Protection guaranteed to a maximum load current of 3.1A. True Load Disconnect Quiescent current in Shutdown Mode is less than 1 A, which maximizes battery life. Applications Single-Cell Li-Ion, LiFePO4 Smart-Phones Ordering Information Portable Equipment RT4813C Marking Information Package Type QUF : UQFN-9L 2x2 (FC) (U-Type) 4M : Product Code W : Date Code Lead Plating System 4MW G : Green (Halogen Free and Pb Free) Note : Richtek products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit L1 RT4813C V SW VOUT V IN OUT C1 C3 R1 VIN FB C2 R2 SCL 2 EN EN I C Control SDA R3 GND Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS4813C-00 September 2017 www.richtek.com 1 RT4813C Pin Configuration (TOP VIEW) 9 1 8 VIN EN VOUT 2 7 FB 3 GND SW 6 4 SDA PGND 5 UQFN-9L 2x2 (FC) Functional Pin Description Pin No. Pin Name Pin Function 1 EN Enable input (1 enabled, 0 disabled), must not be left floating. 2 VOUT Boost converter output. 3 SW Switching node. 4 PGND Power ground. 2 5 SDA I C interface data input. 6 GND Analog ground. 7 FB Voltage feedback. 8 VIN Power input. Input capacitor CIN must be placed as close to IC as possible. 2 9 SCL I C interface clock input. Functional Block Diagram VOUT VIN Gate SW OCP DRV SDA Digital PWM SCL CTRL CTRL EN AMP - FB + OSC OTP UVLO PGND GND VREF Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS4813C-00 September 2017 2 SCL