The LTC1530 is a high power synchronous switching regulator controller optimized for 5V to 1.3V-3.5V output applications. Its synchronous switching architecture drives two external N-channel MOSFET devices to provide high efficiency. The LTC1530 contains a precision trimmed reference and feedback system that provides worst-case output voltage regulation of ±2% over temperature, load current and line voltage shifts. Current limit circuitry senses the output current through the on-resistance of the topside N-channel MOSFET, providing an adjustable current limit without requiring an external low value sense resistor. The LTC1530 includes a fixed frequency PWM oscillator that free runs at 300kHz, providing greater than 90% efficiency in converter designs from 1A to 20A of output current. Shutdown mode drops the LTC1530 supply current to 45µA. The LTC1530 is specified for commercial and industrial temperature ranges and is available in the S0-8 package.
The LTC1530 is a high‑power synchronous switching regulator controller optimized for 5 V to 1.3 V‑3.5 V output applications. It drives two external N‑channel MOSFETs, provides adjustable current‑limit sensing without an external sense resistor, and includes an on‑chip soft‑start capacitor and a 300 kHz fixed‑frequency PWM oscillator.
The device is supplied in an 8‑lead plastic SO‑8 package, operates over a wide temperature range, and offers features such as over‑95% efficiency, internal shutdown to 45 pA, and built‑in thermal protection. Typical applications include power supplies for microprocessors and high‑power 5 V‑to‑low‑voltage converters.
| Quiescent Current (normal operation) | 1 mA |
|---|---|
| Fixed Oscillator Frequency | 300 kHz |
| Package | 8‑Lead Plastic SO‑8 |
The LTC1530 can achieve over 95 % efficiency.
It is available in an 8‑lead plastic SO‑8 package.