SG3524 Buck-Boost Type DC-DC Converter SOIC-16 SMD IC
The SG3524 is a versatile, monolithic integrated circuit that provides all the essential functions for building a regulating power supply, inverter, or switching regulator. Housed in a compact 16-pin SOIC package, this IC is ideal for a wide range of power control applications. It is specifically designed for switching regulators of any polarity, transformer-coupled DC-to-DC converters, and transformerless voltage doublers. The SG3524 simplifies power supply design by integrating key components onto a single chip, including a voltage reference, error amplifier, oscillator, pulse-width modulator, and dual alternating output transistors.
Features
- Complete PWM Control: Integrates all the necessary circuitry for Pulse-Width Modulation (PWM) power control.
- Versatile Output Stage: Uncommitted outputs allow for either single-ended or push-pull configurations.
- Wide Operating Voltage: Operates over a supply voltage range of 8V to 40V.
- On-Chip Reference: Provides a stable 5V reference voltage with a maximum temperature variation of 1%.
- Programmable Oscillator: The oscillator frequency can be set using an external resistor (RT) and capacitor (CT), with an operational range up to 300kHz.
- Low Standby Current: Consumes a typically low 8mA of standby current.
- Integrated Protection: Includes current-limiting and shutdown circuitry to protect the power supply and the load.
Specifications
| Specification | Value |
|---|---|
| Package | SOIC-16 |
| Input Voltage Range (Vcc) | 8 V to 40 V |
| Reference Output Voltage | 4.6 V (Min), 5.0 V (Typ), 5.4 V (Max) |
| Collector Output Current | 100 mA (Max) |
| Reference Output Current | 50 mA (Max) |
| Oscillator Frequency Range | Up to 300 kHz |
| Maximum Duty Cycle (Each Output) | 45% |
| Operating Free-Air Temperature Range | 0°C to 70°C |
| Standby Current | 8 mA (Typ), 10 mA (Max) |
| Turn-Off Voltage Rise Time (tr) | 0.2 µs |
| Turn-On Voltage Fall Time (tf) | 0.1 µs |
Applications
- Transformer-Coupled DC/DC Converters.
- Switching Regulators.
- Inverters.
- Polarity Converters.
- High-Power Output Applications.
