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U3525U - REGULATING PWM

General Description

The UTC U3525U is a pulse width modulator IC and designed for switching power supplies application to improve performance and reduce external parts usage.

Key Features

  • S.
  • Input Voltage: 8~35V.
  • On-chip +5.1V reference is trimmed to ±1%.
  • 100HZ ~ 400KHZ oscillator range.
  • Separate oscillator sync terminal.
  • Adjustable dead time control.
  • Internal soft-start.
  • Pulse-by-pulse shutdown.
  • Input under-voltage lockout with hysteresis.
  • Latching PWM to prevent multiple pulses.
  • Dual source/sink output drivers.

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Other Datasheets by Unisonic Technologies

Part Number Description
U3525 REGULATING PWM

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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UNISONIC TECHNOLOGIES CO., LTD U3525U LINEAR INTEGRATED CIRCUIT REGULATING PWM IC  DESCRIPTION The UTC U3525U is a pulse width modulator IC and designed for switching power supplies application to improve performance and reduce external parts usage. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. The output stage features NOR logic, giving a LOW output for an OFF state. An under-voltage lockout circuitry, which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages, includes approximately 500 mV of hysteresis for jitter free operation.