Conv DC-DC Single Step Down 4.5V 18V 8-Pin SOIC EP T/R

The AP65550 is an adaptive, constant, on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor.The constant-on-time control scheme handles wide input/output voltage ratios and provides low, external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors.The adaptive on-time control supports a seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions. DCM allows AP65550 to maintain high efficiency at light-load conditions.The AP65550 also features programmable soft-start, UVLO, OTP and OCP to protect the circuit.This IC is available in SO-8EP and U-DFN3030-10 packages.

• Fixed-Frequency Emulated Constant On-Time Control
• Good Stability Independent of the Output Capacitor ESR
• Fast Load Transient Response
• Synchronous Rectification: 65mO Internal High-Side Switch and 36mO Internal Low-Side Switch
• Wide Input Voltage Range: 4.5V to 18V
• Output Voltage Range: 0.76V to 6V
• 5A Continuous Output Current
• 650kHz Switching Frequency
• Built-in Over Current Limit
• Built-in Thermal Shutdown Protection
• Programmable Soft-Start
• Pre-Biased Start-Up
• Totally Lead-Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device