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MC33998 - Switching Power Supply

Key Features

  • Operating Voltage Range 6.0 V up to 26.5 V (40 V transient) Temperature Device Package Range (TA).
  • Step-Down Switching Regulator Output VDDH = 5.0 V @ 1400 mA (total) MC33998DW/R2.
  • Linear Regulator with External Pass Transistor VDDL = 2.6 V @ -40°C to 125°C 24 SOICW MCZ33998EG/R2 400 mA.
  • Low-Power Standby Linear Regulator VKAM = 2.6 V @ 10 mA.
  • Two 5.0 V @ 200 mA (typical) Sensor Supplies VREF Protected Against Short-to-Battery and Short-to-Ground wit.

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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 Technical Data Document Number: MC33998 Rev. 2.0, 8/2006 Switching Power Supply with Linear Regulators The 33998 is a medium-power, multi-output power supply integrated circuit that is capable of operating over a wide input voltage range, from 6.0 V up to 26.5 V with 40 V transient capability. It incorporates a sensorless current mode control step-down switching controller regulating directly to 5.0 V. The 2.6 V linear regulator uses an external pass transistor to reduce the 33998 power dissipation. The 33998 also provides a 2.6 V linear standby regulator and two 5.0 V sensor supply outputs protected by internal lowresistance LDMOS transistors.