Functional Safety PMICs
Automotive Buck/Buck-Boost Pre-Regulator with Synchronous Buck and Multiple LDO Regulators
A4411
The A4411 offers a comprehensive power management solution for automotive applications, integrating a buck or buck-boost pre-regulator, a synchronous buck regulator, and multiple LDOs. It features a programmable watchdog timer, power-on reset, and fault protection for robust performance.
Product Details
Product Details
Top Features
- Automotive AEC-Q100 qualified
- 3.5 to 36 VIN operating range, 40 VIN 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
- Synchronous buck regulator (ADJ) delivers 0.8 to 3.3 V
- Two 5 V LDOs for “local” sensors (V5SNR) and communications (V5CAN) with foldback short-circuit protections
- 5 V internal tracking LDO for remote sensors with fold back short circuit and short-to-battery protections (V5P)
- TRACK sets FBADJ or V5SNR as the reference for V5P
- Programmable pulse-width window watchdog (PWWD) with scalable activation delay and selectable tolerance
- Internal Watchdog (WD) CLK with ±5% accuracy
- Accepts external WD CLK for improving accuracy
- Active-Low Watchdog Enable pin (WDENn)
- Dual bandgaps for increased reliability: BGVREF, BGFAULT
- Power-on reset (NPOR) with fixed delay of 2 ms
- Power OK output for 5 V LDOs UV/OV (POK5V)
- Logic enable input for microprocessor control (ENB)
- High-voltage ignition enable input (ENBAT)
- ENBAT status indicator output (ENBATS)
- SLEW rate control pin helps reduce EMI/EMC
- Frequency dithering helps reduce EMI/EMC
- OV and UV protection for all four CPU supply rails
- Pin-to-pin and pin-to-ground tolerant at every pin
- Thermal shutdown protection
- -40°C to 150°C junction temperature range
