Functional Safety PMICs
Automotive Buck/Buck-Boost Pre-Regulator with Synchronous Buck, 5V Protected LDO, and Watchdog
A4413
The A4413 integrates a buck/buck-boost pre-regulator, a synchronous buck, a 5V protected LDO, and a programmable watchdog timer for robust and efficient power management in automotive applications.
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
- 5 V internal LDO for remote sensors with foldback shortcircuit and short-to-battery protections (V5P)
- Programmable pulse-width window watchdog (PWWD) with scalable activation delay and selectable tolerance
- Internal watchdog clock with ±5% accuracy
- Accepts external WD clock for extreme accuracy
- Active-low Watchdog Enable pin (WDENn)
- Dual bandgaps for increased reliability: BGVREF, BGFAULT
- Power-on reset (NPOR) with rising delay of 2 ms monitors the synchronous buck output
- PowerOK output monitors the 5 V LDO (POK5V)
- Logic-enable input for microprocessor control (ENB)
- High-voltage ignition enable input (ENBAT)
- ENBAT status indicator output (ENBATS)
- SLEW rate control helps reduce EMI/EMC
- Frequency dithering helps reduce EMI/EMC
- OV and UV protection for both output supply rails
- Pin-to-pin and pin-to-ground tolerant at every pin
- −40°C to 150°C junction temperature range
- Thermal shutdown protection
