Functional Safety PMICs
Adjustable Frequency Buck or Buck-Boost Pre-Regulator with 2 LDOs, Window Watchdog Timer, and NPOR
ARG81401
These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available. The ARG81401 is an automotive power management IC with a buck or buck-boost pre-regulator, supplying 5V and 3.3V LDOs for CAN/microprocessor power. It features high-voltage enable, NPOR, dual bandgaps, a programmable window watchdog, and extensive protection against various fault conditions for underhood applications.
Product Details
Product Details
Top Features
- Automotive AEC-Q100 qualified
- VIN operating range from 3 to 36 V, with 40 V maximum
- Buck or buck-boost pre-regulator (VREG)
- Adjustable PWM switching frequency: 250 kHz to 2.4 MHz
- PWM frequency can be synchronized to external clock
- Two internal LDO regulators with foldback short-circuit protection
- Power-on reset (NPOR) with fixed delay of 22.5 ms
- Programmable window watchdog timer with a fixed activation delay of 30 ms
- Active low, watchdog timer enable/disable pin (WDENn)
- Dual bandgaps for increased reliability:
- BG1 for VREG, 3V3, and VCP reference
- BG2 for V5 reference, and VREG, 3V3, and VCP fault detection
- Ignition-enable input (ENBAT)
- Frequency dithering helps reduce EMI/EMC
- Undervoltage protection for all output rails
- Pin-to-pin and pin-to-ground tolerant at every pin
- Thermal shutdown protection
- −40°C to 150°C junction temperature range
