The RT4813 is a Boost converter with the input voltage range from 1.8V to 5.5V and provide an average output current limit range from 0.55A to 3.1A. This document explains the function and use of the RT4813 evaluation board (EVB), and provides information to enable operation, output voltage setting of the evaluation board.
General Product Description
The RT4813 allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current; this IC provides a compact solution for systems using advanced Li-Ion battery chemistries.
The RT4813 is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum. In boost mode, output voltage regulation is guaranteed to a maximum load current of 3.1A. Quiescent current in Shutdown Mode is less than 1µA, which maximizes battery life.
Evaluation Board Number: PCB090_V1
Default Input Voltage
Max Output Current
Default Output Voltage
VOUT = 5V
Default Marking & Package Type
RT4813GQUF, UQFN-9L 2x2 (FC)
Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at firstname.lastname@example.org.
The EVB is provided with the test points and pin names listed in the table below.
Comment (expected waveforms or voltage levels on test points)
Input voltage with range 1.8V to 5.5V.
Enable control pin for VOUT.
Pins to set functions such as ILIM_OFF / IPCHG.
Default voltage : 5V ± 1%.
Default voltage : 0.5V ± 1%.
1. Connect input voltage (1.8V < VIN < 5.5V).
2. To use a jumper at “H” option to tie EN pin to input voltage VIN via JP1 or external voltage for enabling the device. Inversely, to use a jumper at “L” option to tie EN pin to ground GND for disabling the device.
3. To verify the output voltage VOUT via the dividing resistors.
4. To connect an external load up to 1A and verify the output voltage and current.
The register as the table shown can be programmed by a MCU through the dedicated I2C interface. The device slave address is 0x39.
UQFN-9L 2x2 (FC)
Top View (1st layer)
PCB Layout—Inner Side (2nd Layer)
PCB Layout—Inner Side (3rd Layer)
Bottom View (4th Layer)