National Semiconductor LM2727 LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
Summary
The LM2727/LM2737 series provides high-efficiency, synchronous buck regulation controllers designed for robust power conversion in sophisticated electronics. These high-speed components efficiently regulate input voltages (2.2V to 16V) down to low operational levels (as low as 0.6V), offering features like adjustable soft-start and advanced over/under-voltage protection. This manual guide covers detailed technical specifications, electrical architecture, pin diagrams, and practical integration advice for power supply designers creating complex systems like Set-Top Boxes or network gateways that demand high reliability and minimal noise.
Manual Details
| Brand | National |
|---|---|
| Pages | 22 |
| File Size | 582.31 KB |
| Published | June 01, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
How can I set or change the switching frequency?
The switching frequency is adjustable from 50kHz to 2MHz by connecting a resistor between Pin 11 (FREQ) and ground.
What function does the Power Good flag serve?
This open drain output pin pulls low when the chip detects Undervoltage, Overvoltage, or Under-Voltage Lockout mode, indicating startup status or failure.
How is the current limit monitored in this setup?
Current limit is achieved by monitoring the voltage drop across the on-resistance of the low-side MOSFET regulator.
What is the minimum output voltage I can achieve?
The output voltage is adjustable down to a minimum of 0.6V.