AP65552

AP65552 5A, 18V, 650kHz ADAPTIVE CCM/COT STEP-DOWN CONVERTER Description The AP65552 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. 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. Pin Assignments ( Top View ) EN 1 8 FB 2 7 VREG5 3 6 VIN BS SW The AP65552 features programmable soft-start, UVLO, OTP and OCP to protect the circuit. This IC is available in SO-8EP package. SS 4 SO-8EP 5 GND Features  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: 0.76V to 6V  5A Continuous Output Current  650kHz Switching Frequency  Built-in Overcurrent 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) Applications  Gaming Consoles  Flat Screen TV Sets and Monitors  Set T...