UC3525ANG4

The UC3525ANG4 is a Regulating Pulse Width Modulator 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 reference is trimmed to ±1% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A single resistor between the CT and the discharge terminals provides a wide range of dead-time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. 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.

• 8 to 35V Operation
• 5.1V Reference trimmed to ±1%
• 100Hz to 500KHz 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
• Green product and no Sb/Br