A4408 Datasheet | Allegro MicroSystems

Adjustable Frequency Buck or Buck-Boost Pre-Regulator with Synchronous Buck, 3 Internal LDOs, Watchdog Timer, NPOR, and FF0/FF1 Features AND BENEFITS - Automotive AEC-Q100 qualified - 2.8 to 36 VIN operating range, 40 VIN maximum - Buck or buck-boost pre-regulator (VREG) - Adjustable PWM switching frequency: 250 k Hz to 2.4 MHz - PWM frequency can be synchronized to external clock - Adjustable synchronous buck regulator (1.25 VNOM) - 3.3V (3V3) and 5V (V5) internal LDO regulators with foldback short-circuit protections - 5V (V5P) internal tracking LDO regulator with foldback short-circuit and short-to-battery protections - TRACK sets either 3V3 or V5 as the reference for V5P - Power-on reset (NPOR) with fixed delay of 15 ms - Programmable watchdog timer with activation delay - Active-low watchdog timer enable pin (WDENn) - Dual bandgaps for increased reliability: BGVREF, BGFAULT - MODE pin sets the NPOR undervoltage threshold for V5 and V5P - Fixed POK5V undervoltage threshold for V5 and V5P - Logic enable input (ENB) for microprocessor control - Two ignition enable inputs (ENBAT1 and ENBAT2) Continued on next page... APPLICATIONS - Electronic Power Steering (EPS) - Transmission Control Units (TCU) - Advanced Braking Systems (ABS) - Emissions Control Modules - Other automotive applications PACKAGE: 38-Pin e TSSOP (suffix LV) Not to scale DESCRIPTION...