LM2734ZEVAL [Texas Instruments]

The LM2734 is a constant frequency PWM buck regulator IC that delivers a 1-A load current with a preset switching frequency of either 550 kHz (LM2734Y) or 1.6 MHz (LM2734X). It operates from a 3.0-V to 20-V input voltage range and provides an output voltage from 0.8-V to 18-V. The device uses current-mode PWM operation and internal compensation for high-performance regulation. Features include an internal 300-mΩ NMOS switch, 30-nA shutdown current, 0.8-V internal voltage reference with 2% accuracy, internal soft-start, thermal shutdown, and pulse-by-pulse current limit. The high switching frequencies allow the use of small surface-mount inductors and capacitors, minimizing PCB area. The LM2734 is designed for local point-of-load regulation and is supported by WEBENCH® online design tools.