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ISL8540 - DC/DC Power Switching Regulator

General Description

The input supply for the PWM regulator power stage.

Connected to DRAIN of the high side MOSFET.

A resistor to VIN and a capacitor to GND determine the frequency of the saw-tooth oscillator.

Key Features

  • of this next generation of DC/DC converter include pulse-by-pulse current limit for FET protection, hiccup mode for short circuit protection, voltage feedforward regulation, Frequency SYNC, soft-start, low standby current of 60µA typical in the disabled state, and thermal shut-down. The device is available in a 20 Ld HTSSOP package. Features.
  • Voltage feedforward mode.
  • Step down DC/DC supporting up to 2A.
  • Input voltage range of 9.0V to 40V.
  • Internal reference.

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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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® ISL8540 Data Sheet September 9, 2008 FN6495.5 DC/DC Power Switching Regulator The ISL8540 is a step down DC/DC power switching regulator which accepts 9.0V to 40V input and provides a 2A output current. The output voltage can be set in the range between 1.21V and 35V by means of an external divider. The device uses an internal power DMOS transistor with a typical rDS(ON) of 0.19Ω to obtain very high efficiency and high switching speed. A switching frequency in the range of 100kHz to 600kHz can be realized (the maximum power dissipation of the various packages must be observed).