UC3527B - Unitrode

UC3527B Regulating Pulse Width Modulators

The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eli.

Features

• 8 to 35V Operation
• 5.1V Buried Zener Reference Trimmed to ±0.75%
• 100Hz to 500kHz Oscillator Range
• Separate Oscillator Sync Terminal
• Adjustable Deadtime Control
• Internal Soft-Start
• Pulse-by-Pulse Shutdown
• Input Undervoltage Lockout with Hysteresis
• Latching PWM to Prevent Multiple Pulses
• Dual Source/Sink Output Drivers
• Low Cross Conduction Output Stage
• Tighter Reference Specifications BLOCK DIAGRAM DESCRIPTION The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in desi.