SG3525AN

SG3525AN is a regulating pulse width modulator IC is 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 provide a wide range of dead time adjustment. This device also features 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.

• 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/sink output drivers
• Output voltage range 5V to 5.2V at Tj = 25°C
• 16 pin PDIP package
• Operating ambient temperature range from 0 to 70°C