Power Supply with Multiple Linear Regulators

Power Supply with Multiple Linear Regulators | NXP Semiconductors

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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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Data Sheet

Application Notes

Product Details

Block Diagram

Power Supply with Multiple Linear Regulators

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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