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Automotive Buck/Buck-Boost Pre-Regulator with Synchronous Buck, 5V Protected LDO, and Watchdog

A4413

A4413 Product image

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.

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Packaging

Typical Applications

  • 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

The A4413 is supplied in a low-profile 32-lead, 5 mm × 5 mm, 0.5 mm pitch QFN package (suffix “ET”) with exposed thermal pad.

ET Package Documentation

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Part Number Specifications and Availability

Documentation and Resources

Design Support Tools

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