SG2525ADW

Overview

The SG2525ADW is a regulating pulse width modulator from Microchip Technology, designed for switching power supply implementations. It operates on an 8V to 35V supply and features a 5.1V reference trimmed to ±1% accuracy. The oscillator range spans 100Hz to 500kHz, adjustable via a single external resistor. Output stages are totem-pole designs capable of sourcing or sinking over 200mA. It includes built-in soft-start, undervoltage lockout, and latch protection. The device is housed in a 16-lead SOIC package.

Feature Summary

• Integrated 5.1V reference with high initial accuracy eliminates need for external potentiometers
• Totem-pole output stages provide robust current sourcing and sinking capabilities
• Built-in soft-start and undervoltage lockout ensure controlled turn-on and safe operation
• Oscillator synchronization input allows slaving multiple units or locking to external clocks

Applications

• DC-DC switching power supplies
• AC-DC converters
• Battery chargers
• Uninterruptible power supplies (UPS)

Procurement Notes

Verify the specific suffix 'DW' indicates the SOIC-16 surface mount package variant. Confirm that the manufacturer designation aligns with Microchip Technology, as historical data may reference Microsemi. Ensure the component meets the required operating temperature range of -25°C to 85°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when a voltage-mode PWM controller with integrated soft-start and latch protection is required. It is suitable for applications needing a stable 5.1V reference without external trimming components. Consider the 200mA output drive capability for direct gate driving of power MOSFETs. Verify compatibility with the desired switching frequency range up to 500kHz.

Part Context

This part belongs to the SG1525A/SG1527A series of pulse width modulators. These ICs are engineered to reduce external parts count while improving performance in various switching regulator topologies. The SG2525ADW specifically utilizes NOR logic for its output stage, resulting in a low output state when inactive, distinguishing it from OR-logic variants.

Replacement Considerations

Compatible substitutes include the SG1525ADW and SG1524ADW, provided the logic polarity (NOR vs OR) matches the circuit design requirements. Cross-reference with STMicroelectronics SG2525AN for pin-compatible alternatives, ensuring electrical parameters such as output current and reference accuracy remain within acceptable limits.