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33702 - 3.0 A Switch-Mode Power-Supply

General Description

Pin 1 Pin Name FREQ Formal Name Oscillator Frequency Definition This selection switcher pin can be adjusted by connecting external resistor RF to the FREQ pin.

The default switching frequency (FREQ pin left open or tied to VDDI) is set to 300 kHz.

Buck Controller Error Amplifier inverting input.

Key Features

  • and to allow space-efficient, compact design. The 33702 incorporates many advanced features; e. g. , precisely maintained up/down power sequencing, ensuring the proper operation and protection of the CPU and power system. Features.
  • Operating Voltage: 2.8 V to 6.0 V.
  • High-Accuracy Output Voltages.
  • Fast Transient Response.
  • Switcher Output Current Up to 3.0 A.
  • Undervoltage Lockout.
  • Power Sequencing.
  • Programmable Watchdog Timer.

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33742 System Basis Chip (SBC)
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Freescale Semiconductor, Inc. MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document from Analog Marketing: MC33702/D Rev 0, 05/2003 Preliminary Information 3.0 A Switch-Mode Power Supply with Linear Regulator The 33702 provides the means to efficiently supply the Power QUICC™ I, II, and other families of Motorola microprocessors and DSPs. The 33702 incorporates a high-performance switching regulator, providing the direct supply for the microprocessor’s core, and a low dropout (LDO) linear regulator control circuit providing the microprocessor I/O and bus voltage. The switching regulator is a high-efficiency synchronous buck regulator with integrated 50 mΩ N-channel power MOSFETs to provide protection features and to allow space-efficient, compact design.