A8580 Datasheet | Allegro MicroSystems

Wide Input Voltage, 2.4 MHz, 2.5 A, Asynchronous Buck Regulator with Low-IQ Standby, Sleep Mode, External Synchronization, and NPOR Output Features AND BENEFITS - Automotive AEC-Q100 qualified - Withstands surge voltages up to 40 V - Operates as low as 3.4 VIN (typ) with VIN decreasing - Utilizes pulse frequency modulation (PFM) to draw only tens of microamperes from VIN while maintaining keep-alive VOUT - PWM/PFMn mode control input pin - Delivers up to 2.5 A of output current with integrated 110 mΩ high voltage MOSFET - SLEEPn input pin mands ultra-low current shutdown mode - Adjustable output voltage with ±1.0% accuracy from 0°C to 85°C, ±1.5% from - 40°C to 150°C - Programmable switching frequency: 250 k Hz to 2.4 MHz - Synchronization capability: applying a clock input to the PWM/PFMn input pin will increase the PWM frequency - Active low, power-on reset (NPOR) open-drain output Continued on the next page… Package: 16-pin TSSOP with exposed thermal pad (suffix LP) Not to scale DESCRIPTION Designed to provide the power supply requirements of next generation car audio and infotainment systems, the A8580 provides all the control and protection circuitry to produce a high current regulator with ±1.0% output voltage accuracy. The A8580 employs pulse frequency modulation (PFM) to draw less than 50 µA from 12VIN while supplying 3.3 V/40 µA. After startup, the A8580 operates down to at least 3.6 VIN (VIN falling). Features of the A8580 include a PWM/PFMn mode control input to enable PWM (logic high) or PFM (logic low). If the PWM/PFMn input is driven by an external clock signal higher than the base frequency ( f OSC ) the PWM frequency synchronizes to the ining clock frequency. The SLEEPn input pin mands an ultra-low current shutdown mode requiring less than 5 µA for internal circuitry and 10 µA (max) for MOSFET leakage at 16 VIN , 85°C. The A8580 has external pensation to acmodate a wide range of frequencies and external ponents and provides a...