Power Supply with Multiple Linear Regulators

MC33730

The NXP® MC33730 is a multiple output power supply integrated circuit that incorporates a switching regulator with an adjustable frequency oscillator for automotive applications.

  • The integrated circuit incorporates a switching regulator which operates over a wide input voltage range from +4.5 V to +26.5 V
  • The step-down switching regulator uses a fixed frequency PWM voltage mode control
  • It has a 3.5 A current limit (typical) and the slew-rate is adjustable via a control pin to reduce switching noise
  • The switching regulator has an adjustable frequency oscillator, which allows the user to optimize its operation over a wide range of input voltages and component values

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Block Diagram

Power Supply with Multiple Linear Regulators

NXP<sup>&#174;</sup> MC33730 Power Actuation Block Diagram
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Features

Key Features

  • Provides all regulated voltages for Our 32-bit and other microcontroller families and their logic and analog functions
  • Adjustable frequency switching buck regulator with slew-rate control
  • Power sequencing provided
  • Programmable voltages VDDL, VDD3 - 3% accuracy
  • Programmable standby regulator VKAM - 15% accuracy, operating down to 4.5 V at KA_VBAT pin
  • VDD3 can be programmed as an optional second standby regulator with 15% accuracy
  • Provides two 5.0 V protected supplies for sensors
  • Provides reverse battery protection FET gate drive
  • Provides necessary MCU monitoring and fail-safe support
  • 5 linear / LDO regulators
  • Single buck regulator
  • Supply voltage min. 4.5 V, max. 26.5 V
  • Output voltage 5 V
  • Output current 0.15 A

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The MC33730 is included in the 15-year program

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