RT4803A Overview
The RT4803A 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 bining built-in power transistors, synchronous rectification, and low supply current; this IC provides a pact solution for systems using advanced Li-Ion battery chemistries. The RT4803A 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 2000mA. Quiescent current in shutdown mode is less than 1A, which maximizes battery life. The regulator transitions smoothly between bypass and normal boost mode. The device can be forced into bypass mode to reduce quiescent current. The RT4803A is available in the WL-CSP-16B...
RT4803A Key Features
- Input Voltage Range : 1.8V to 5V
- Programmable Output Voltage from 2.85V to
- Default Boost Output Voltage Setting
- VOUT = 3.4V at VSEL = H
- VOUT = 3.15V at VSEL = L
- Maximum Continuous Load Current : 2A at VIN > 2.65V Boosting VOUT to 3.35V
- Up to 95% Efficiency
- nBYP (L) : Forced Bypass Mode
- nBYP (H) : Auto Bypass Operation when VIN > Target VOUT
- Internal Synchronous Rectifier
