Application Block for TWS Recommended Items Product Name Function RP509 0.5A/1A 6MHz PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier RP110 Low Voltage Low Supply Current 150mA LDO Regulator R5433Z Low Supply Current 3-Cell to 5-Cell Li-ion Battery Protection IC RP402 PWM/VFM Step-up DC/DC Converter with Synchronous Rectifier