A8651

A8651 Low Input Voltage, Adjustable Frequency Dual Synchronous 2 A / 2 A Buck Regulator with Synchronization, 2× EN, and 2× NPOR FEATURES AND BENEFITS AEC-Q100 qualified Operating voltage range: 2.5 to 5.5 V UVLO stop threshold: 2.25 V (max) Dual outputs with up to 2 A output current per regulator Adjustable output voltage as low as 0.8 V Internal 80 mΩ high-side switching MOSFET Internal 55 mΩ low-side switching MOSFET Adjustable oscillator frequency ( fOSC ): 0.35 to 2.2 MHz Synchronizes to external clock: 1.2 × to 1.5 × fOSC 180° phase shift between switching regulators Sleep mode supply current less than 5 μA Soft-start time externally set via the SS pin Pre-biased startup capable Externally adjustable compensation Stable with ceramic output capacitors Independent enable inputs and NPOR output pins NPOR delay of 7.5 ms (A8651) or 120 µs (A8651-1) Adjustable current limiting (OCP) for each regulator Hiccup mode short-circuit protection (HIC) Overvoltage and overtemperature protection Open-circuit and adjacent pin short-circuit tolerant Short-to-ground tolerant at every pin PACKAGE: 20-pin TSSOP with exposed thermal pad (suffix LP) Not to scale DESCRIPTION The A8651 is an adjustable frequency, high output current, PWM regulator that integrates a high-side, P-channel MOSFET and a low-side, N-channel MOSFET. The A8651 incorporates current-mode control to provide simple compensation, excellent loop stability, and fast transient res...