The ADP5053 combines four high performance buck regulators, a supervisory circuit, a watchdog timer, and a manual reset in a 48-lead LFCSP package that meets demanding performance and board space requirements. The device enables direct connection to high input voltages up to 15.0 V with no preregulators. Channel 1 and Channel 2 integrate high-side power MOSFET and low-side MOSFET drivers. External NFETs can be used in low-side power devices to achieve an efficiency optimized solution and deliver a programmable output current of 1.2 A, 2.5 A, or 4 A. Combining Channel 1 and Channel 2 in a parallel configuration can provide a single output with up to 8 A of current. Channel 3 and Channel 4 integrate both high-side and low-side MOSFETs to deliver an output current of 1.2 A. The switching frequency of the ADP5053 can be programmed or synchronized to an external clock. The ADP5053 contains a precision enable pin on each channel for easy power-up sequencing or adjustable UVLO threshold. The ADP5053 contains supervisory circuits that monitor the voltage level. The watchdog timer can generate a reset if the WDI pin is not toggled within a preset timeout period. Processor reset mode or system power on/off switch mode can be selected for manual reset functionality. Applications * Small cell base stations * FPGA and processor applications * Security and surveillance * Medical applications * Wide input voltage range: 4.5 V to 15.0 V * ±1.5% output accuracy over full temperature range * 250 kHz to 1.4 MHz adjustable switching frequency * Adjustable/fixed output options via factory fuse * Power regulation * Channel 1 and Channel 2: programmable 1.2 A/2.5 A/4 A sync buck regulators with low-side FET driver * Channel 3 and Channel 4: 1.2 A sync buck regulators * Single 8 A output (Channel 1 and Channel 2 operated in parallel) * Precision enable with 0.8 V accurate threshold * Active output discharge switch * FPWM or automatic PWM/PSM selection * Frequency synchronization input or output * Optional latch-off protection on OVP/OCP failure * Power-good flag on selected channels * UVLO, OCP, and TSD protection * Open-drain processor reset with external adjustable threshold monitoring * Watchdog refresh input * Manual reset input https://elecena.pl/product/4783589/integrated-power-solution-with-quad-buck-regulators-and-supervisory-circuits 2014-07-18 https://elecena.pl/product/4783589/integrated-power-solution-with-quad-buck-regulators-and-supervisory-circuits 2018-03-28 https://elecena.pl/product/4783589/integrated-power-solution-with-quad-buck-regulators-and-supervisory-circuits 2025-01-17