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High-frequency Hz operation with current capacity up to A for demanding applications

UC3525AN General Description

With a focus on performance optimization and part count reduction, the UC3525AN pulse width modulator integrated circuit is a valuable tool for designing switching power supplies with improved efficiency and functionality. The integration of key features such as a precision 5.1-V reference voltage, adjustable dead-time control, and built-in soft-start circuitry simplifies the design process and enhances operational reliability. The shutdown terminal provides convenient control over soft-start functionality and output stages, offering both instantaneous turn-off and soft-start recycle options for enhanced power supply performance. The UC3525AN is a versatile and reliable solution for power supply design applications that require high performance and flexibility

Key Features

  • 8-V to 35-V Operation
  • 5.1-V Reference Trimmed to 1%
  • 100-Hz to 500-kHz Oscillator Range
  • Separate Oscillator Sync Terminal
  • Adjustable Dead-Time Control
  • Internal Soft Start
  • Pulse-by-Pulse Shutdown
  • Input Undervoltage Lockout With Hysteresis
  • Latching PWM to Prevent Multiple Pulses
  • Dual Source and Sink Output Drivers


Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Voltage
Duty cycle (max) (%) 49 Switching frequency (max) (kHz) 500
Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 7/6.5
Operating temperature range (°C) 0 to 70 Rating Catalog
Gate drive (typ) (A) 0.4 Vin (max) (V) 40
Product Category Switching Controllers Number of Outputs 2 Output
Switching Frequency 100 kHz to 500 kHz Duty Cycle - Max 50 %
Input Voltage 8 V to 35 V Output Voltage 5.1 V
Output Current 500 mA Minimum Operating Temperature 0 C
Maximum Operating Temperature + 70 C Mounting Style Through Hole
Fall Time 50 ns Height 4.57 mm
Length 19.3 mm Operating Supply Voltage 8 V to 35 V
Product Type Switching Controllers Rise Time 100 ns
Series UC3525A Factory Pack Quantity 25
Subcategory PMIC - Power Management ICs Type Voltage Mode PWM Controllers
Unit Weight 0.037172 oz

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In Stock: 7,764

Minimum Order: 1

Qty. Unit Price Ext. Price
1+ $0.956 $0.96
10+ $0.814 $8.14
30+ $0.736 $22.08
100+ $0.646 $64.60
500+ $0.607 $303.50
1000+ $0.590 $590.00

The prices below are for reference only.