Wide Input and Ultra-Low Quiescent Current Boost Converter with High Efficiency

RT4823

The RT4823 integrates built-in power transistors, synchronous rectification, and low supply current to provide a compact 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 1500mA. Quiescent current in shutdown mode is less than 1μA, 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.

應用

NFC Device Power Supply
USB Charging Ports
PC Accessory Application (Keyboard, Mouse, etc.)
TWS (True Wireless Stereo) Hall Sensor
Gaming Device Sensor

主要規格

	RT4823
Status	Active
Vin (min) (V)	1.8
Vin (max) (V)	5.5
Vout (min) (V)	5
Vout (max) (V)	5
Output Adj. Method	Fixed
Iq (typ) (mA)	0.004
SW Current Limit (typ) (A)	2.15
Freq (typ) (kHz)	3.5
Freq (min) (kHz)	3
Freq (max) (kHz)	4
Ron (typ) (Ohm)	0.08
Features	OCP;OVP;SCP
Package Type	WL-CSP1.3x1.2-9(BSC)

關鍵特性

Ultra-Low Operating Quiescent Current
Quickly Start-Up Time (< 400μsec)
3 Few External Components : 1μH Inductor, 0402 Case Size Input and 0603 Case Size Output Case Size Capacitors
Input Voltage Range : 1.8V to 5.5V
Support V_IN > V_OUT Operation
Default Boost Output Voltage Setting : V_OUT = 5V
Maximum Continuous Load Current : 1.3A at V_IN > 3.6V Boosting V_OUT 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