Overview
Description
The RAA489800 is a bidirectional, buck-boost voltage regulator that provides buck-boost voltage regulation and protection features. The advanced Renesas R3™ Technology provides high light-load efficiency, fast transient response, and seamless DCM/CCM transitions.
The RTKA489800DE0000BU takes input power from a wide range of DC power sources up to 23V (such as conventional AC/DC adapters (ADP), USB PD ports, travel ADP) and safely converts it to a regulated voltage up to 21V. The RAA489800 can also convert a wide range DC power source connected at its output (system side) to a regulated voltage to its input (ADP side). This bidirectional buck-boost regulation feature makes the RAA489800 application versatile. In addition to 4-switch buck-boost configuration, it can also support the 2-switch Buck mode operation.
The RTKA489800DE0000BU includes various system operation functions such as the Forward mode enable pin, Reverse mode enable pin, programmable soft-start time, and adjustable forward and reverse VOUT. It also has forward and reverse power-good indicators. The protection functionalities include OCP, OVP, UVP, and OTP.
The RTKA489800DE0000BU has serial communication through SMBus/I2C that allows programming of many critical parameters to deliver a customized solution. These programming parameters include but are not limited to output current limit, input current limit, and output voltage setting.
Features
- Bidirectional buck, boost, and buck-boost operation
- Configurable for 4-switch buck-boost or 2-switch buck operation
- Input voltage range: 3.8V to 23V (no dead zone)
- Output voltage: up to 21V
- Up to 1MHz switching frequency
- Pin programmable soft-start time
- LDO output for VDD and VDDP
- System FAULT status ALERT function
- Input/output internal discharge function
- Active switching for negative voltage transitions
- Pass-Through mode in both directions
- Forward and Reverse mode enable pins
- OCP, OVP, UVP, and OTP protection
- Absolute overvoltage protection
- SMBus and auto-increment I2C compatible
Applications
- Tablets
- Ultrabooks
- Power banks
- Mobile devices
- USB-C
Documentation
Featured Documentation
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| Type | Title | Date |
| Manual - Software | PDF 1.28 MB | |
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Design & Development
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