The LM2734YMK/NOPB is a compact, high-efficiency step-down (buck) DC-DC switching regulator from Texas Instruments, designed for space-constrained applications requiring adjustable voltage conversion. Packaged in a TSOT-23-6 (Thin SOT-23-6) footprint (2.97mm × 1.65mm × 0.87mm), this device supports a wide input voltage range (3V to 20V) and delivers a programmable output voltage from 0.8V to 18V at up to 1A load current. It operates at a fixed switching frequency of 550kHz, balancing efficiency and EMI performance in portable and industrial systems.

Key Features

This regulator features ±2% output voltage accuracy, ultra-wide input/output voltage flexibility, and a low quiescent current (2.1mA), ensuring efficient power management in battery-powered or low-power designs. It integrates thermal shutdown, input under-voltage lockout (UVLO), and overcurrent protection to safeguard against harsh operating conditions. The device operates across an extended temperature range (-40°C to +125°C) and eliminates the need for external MOSFETs due to its integrated switching capabilities. Its compact form factor and robust design make it ideal for high-density board layouts.

Applications

Primarily used in portable electronics (e.g., smartphones, tablets), the LM2734YMK/NOPB is suited for industrial power supplies, automotive embedded systems, and IoT devices requiring compact, high-current step-down solutions. Its wide input range accommodates fluctuating power sources, such as batteries or solar systems, while its precision output supports applications like sensor modules, medical devices, and consumer appliances needing reliable voltage regulation in confined spaces.

Summary

The LM2734YMK/NOPB combines high efficiency, broad voltage adaptability, and rugged reliability in an ultra-compact package, positioning it as a versatile buck regulator for power-sensitive and space-constrained systems. Its integrated switching, thermal protection, and wide temperature tolerance cater to diverse markets, including consumer electronics, automotive, and industrial automation, where compact, dependable DC-DC conversion is critical.