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MB3817 - Switching Regulator Controller

General Description

The MB3817 is a pulse width modulator (PWM) type switching regulator controller IC designed for low-voltage and high-speed operation.

This can be used in applications as down-conversion or down/up-conversion (Zeta method).

Key Features

  • Wide range of operating power supply voltages: 2.5 V to 18 V Built-in high-precision reference voltage generator: 1.5 V ± 2% High speed operation is possible: Max. 500 kHz Wide input voltage range of error amplifier: 0 to VCC.
  • 0.9 V Built-in soft start function Built-in timer/latch-actuated short-circuiting protection circuit Totem-pole type output with adjustable on/off current (for PNP transistor.

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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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FUJITSU SEMICONDUCTOR DATA SHEET DS04-27216-2E ASSP For Power Supply Applications BIPOLAR Switching Regulator Controller MB3817 s DESCRIPTION The MB3817 is a pulse width modulator (PWM) type switching regulator controller IC designed for low-voltage and high-speed operation. This can be used in applications as down-conversion or down/up-conversion (Zeta method). With fewer external components and faster operating speed, the MB3817 enables reduction in power supply unit size, making it ideal for use with internal power supplies in compact, high-performance portable devices. s FEATURES • • • • • • • • • Wide range of operating power supply voltages: 2.5 V to 18 V Built-in high-precision reference voltage generator: 1.5 V ± 2% High speed operation is possible: Max.