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U3525U - REGULATING PWM

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.

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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Datasheet preview – U3525U

Datasheet Details

Part number U3525U
Manufacturer UTC
File Size 314.05 KB
Description REGULATING PWM
Datasheet download datasheet U3525U Datasheet
Additional preview pages of the U3525U datasheet.

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Full PDF Text Transcription

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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.
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