AP65453

ADVANCED INFORMATION AP65453 4A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER Description The AP65453 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. The adaptive, constant on-time control supports seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions. Pin Assignments ( Top View ) EN 1 FB 2 VREG5 3 SS 4 8 VIN 7 BS 6 SW 5 GND SO-8EP DCM allows AP65453 to maintain high efficiency at light load conditions. The AP65453 also feat...