Functional Safety PMICs
2.2 MHz Automotive Buck Pre-Regulator with Multiple LDOs, Watchdog, and SPI
A4407
The A4407 integrates a 2.2 MHz buck pre-regulator, multiple LDO regulators, a configurable watchdog timer, and SPI control for flexible power management in automotive applications. Its wide input voltage range, fault protection, and diagnostic capabilities ensure robust performance in demanding environments.
Product Details
Product Details
Top Features
- AEC-Q100 Grade 0 qualified
- Internal buck pre-regulator followed by LDO outputs
- 5.5 to 36 V VIN operating range (50 V maximum); for start/stop, cold crank, and load dump requirements
- Constant on-time (COT) buck pre-regulator
- Valley current sensing achieves shortest buck on-times
- 2.2 MHz (VIN - adjusted) switching frequency
- 5 V internal low-dropout tracking linear regulator with foldback short circuit and short-to-battery protections
- 5 V internal low-dropout linear regulator with foldback short circuit protection
- 3.3 V external FET controller/driver with programmable current limit and foldback short circuit protection
- 1.2 V/1.5 V/1.8 V external FET controller/driver with programmable current limit and foldback protection
- Power-on reset (NPOR) with adjustable rising delay
- Logic enable input (ENB) for microprocessor control
- Ignition enable input (ENBAT) for remote startup
- Ignition status indicator (ENBATS) output
- Buck pulse-by-pulse overcurrent protection
- Buck LX short circuit protection (latched)
- Missing asynchronous diode protection (latched)
- UVLO for VIN, charge pump, and the internal rail
- Thermal shutdown protection
- −40ºC to 150ºC junction temperature range
