APW8861 Overview
Description
Buck Controller (VDDQ) - High Input Voltages Range from 4.5V to 26V Input Power - Provide Adjustable Output Voltage from 0.75V to 3.3V - Integrated MOSFET Drivers and Bootstrap Forward P-CH MOSFET - Low Quiescent Current (200uA) - Excellent Load Transient Responses - PFM Mode for Increased Light Load Efficiency - Constant On-Time Controller Scheme - Switching Frequency Compensation for PWM Mode - Adjustable Switching Frequency from 400kHz to 550kHz in PWM Mode with DC Output Current - S3 and S5 Pins Control The Device in S0, S3 or S4/ S5 State - Power Good Monitoring - 70% Under-Voltage Protection (UVP) - 125% Over-Voltage Protection (OVP) - Adjustable Current-Limit Protection - Using Sense Low-Side MOSFET’s RDS(ON) - TQFN-32 4mmx4mm Thin package - Lead Free Available (RoHS Compliant) +1.5A LDO Section (VTT) - Sourcing and Sinking Current up to 1.5A - Fast Transient Response for Output Voltage - Output Ceramic Capacitors Support at least 10µF MLCC - VTT and VTTREF Track at Half the VDDQSNS by internal divider - +20mV Accuracy for VTT and VTTREF - Independent Over-Current Limit (OCL) - Thermal Shutdown Protection The APW8861 integrates a synchronous buck PWM converter to generate VDDQ, a sourcing and sinking LDO linear regulator to generate VTT. It offers the lowest total solution cost in system where space is at a premium.
