A4408 Description
The A4408 is power management IC that uses a buck or buck-boost pre-regulator to efficiently convert automotive battery voltages into a tightly regulated intermediate voltage, plete with control, diagnostics, and protections. The output of the pre-regulator supplies a 5 V / 115 mAMAX tracking/protected LDO, a 3.3 V / 165 mAMAX LDO, a 5 V / 325 mAMAX LDO, and an adjustable output synchronous buck regulator (1.25 VTYP...
A4408 Key Features
- Automotive AEC-Q100 qualified
- 2.8 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
- Adjustable synchronous buck regulator (1.25 VNOM)
- 5V (V5P) internal tracking LDO regulator with foldback
- TRACK sets either 3V3 or V5 as the reference for V5P
- Power-on reset (NPOR) with fixed delay of 15 ms
- Programmable watchdog timer with activation delay