Pulse Width Modulation Controller IC SG3525A
Description
The SG3525A is a pulse width modulator (PWM) control circuit designed to provide high-performance PWM control for switching power supplies and DC-DC converters with a low external parts count. It integrates essential functions including a precision 5.1 V ±1% reference, internal oscillator, error amplifier, soft-start circuitry, and dual totem-pole outputs capable of sourcing and sinking significant current. The device also includes features such as adjustable dead-time control, under voltage lockout with hysteresis, and pulse-by-pulse shutdown for robust, reliable power conversion designs.
FEATURES
- Supply Voltage: 8 V to 35 V
- Internal Reference Output: 5.1 V ±1%
- Oscillator Frequency Range: ~100 Hz to 400 kHz
- Dead-Time Control: Adjustable via external resistor
- Soft-Start: Built-in, external timing cap
- Outputs: Dual totem-pole, ±400 mA peak typical
- Shutdown/Protection: Pulse-by-pulse shutdown, UVLO
- Typical Operating Temp: Depends on manufacturer; often −40 °C to +125 °C
SPECIFICATION
- Dimension: 10.45 × 7.60 × 1.27 mm
- Additional information
- Gross weight: 1 g
- Manufacturer part number: SG3525A
