RT4823 Datasheet | Richtek

Description The RT4823 integrates built-in power transistors, synchronous rectification, and low supply current to provide a pact solution for systems using advanced Li-Ion battery chemistries. The RT4823 is capable of supplying significant energy when the battery voltage is lower than the required voltage for system power ICs. The RT4823 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 1500m A. Quiescent current in shutdown mode is less than 1A, which maximizes the 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 RT4823 is available in the WL-CSP-9B 1.3x1.2 (BSC) package. Applications - NFC Device Power Supply - USB Charging Ports - PC Accessory Application (Keyboard, Mouse...etc.) - TWS (True Wireless Stereo) Hall Sensor - Gaming Device Sensor Features - Ultra-Low Operating Quiescent Current - Quickly Start-Up Time (< 400sec) - 3 Few External ponents : 1H Inductor, 0402 Case Size Input and 0603 Case Size Output Case Size Capacitors - Input Voltage Range : 1.8V to 5.5V - Support VIN > VOUT Operation - Default Boost Output Voltage Setting : VOUT = 5V - Maximum Continuous Load Current : 1.3A at VIN > 3.6V Boosting VOUT to 5V - Up to 93% Efficiency - EN(H) : Boost Mode - EN(L), BP(H) : Bypass Mode - EN(L), BP(L) : Shutdown Mode - Internal Synchronous Rectifier - Over-Current Protection - Cycle-by-Cycle Current Limit - Over-Voltage Protection - Short-Circuit Protection - Over-Temperature Protection - Small WL-CSP-9B 1.3x1.2 (BSC) Package Simplified Application Circuit RT4823 L VOUT VOUT COUT...