A4409 Description
A4409 Adjustable Frequency Buck or Buck-Boost Pre-Regulator with 2 LDOs, Window Watchdog Timer, and NPOR.
A4409 Key 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 5 V internal LDO regulators with foldback short
- Power-on reset (NPOR) with fixed delay of 22.5 ms
- Programmable window watchdog timer with a fixed
- Active low, watchdog timer enable/disable pin (WDENn)
- Dual bandgaps for increased reliability