AP65550FN-7

NOT RECOMMENDED FOR NEW DESIGN CONTACT US AP65550 5A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER Description Pin Assignments 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 TVs and monitors. ( Top View ) 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. EN 1 8 VIN FB 2 7 BST VREG5 3 6 SW 5 GND PGND 9 SS 4 SO-8EP The adaptive, on-time control supports seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions. ( Top View ) 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. EN 1 FB 2 VREG5 3 BST 4 SS 5 This regulator is available in SO-8EP and U-DFN3030-10 packages. Exposed Pad 11 PGND 10 VIN 9 VIN 8 SW 7 SW 6 GND U-DFN3030-10 Features Applications Applications                        Fixed Frequency Emulated Constant On-Time Control Good Stability Independent of the Output Capacitor ESR Fast Load Transient Response Synchronous Rectification: 65mΩ Internal High-Side Switch and 36mΩ Internal Low-Side Switch Wide Input Voltage Range: 4.5V to 18V Output Voltage Range: 0.765V 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 (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: Gaming Consoles Flat Screen TV Sets and Monitors Set-Top Boxes Distributed Power Systems Home Audio Consumer Electronics Network Systems FPGA, DSP and ASIC Supplies Green Electronics 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain