The LM2738 is a high frequency, low power, 1.5A step-down DC/DC converter from TI that is available in an 8-pin LLP or 8-pin eMSOP package. It provides all the active functions for local DC/DC conversion with fast transient response and accurate regula- tion in the smallest possible PCB area. With a minimum of external components, the LM2738 is easy to use.
The LM2738 is a monolithic, high‑frequency PWM step‑down DC/DC converter offered in 8‑pin LLP and 8‑pin eMSOP packages. It provides up to 1.5 A output current with internal soft‑start, current‑mode control, thermal shutdown and over‑voltage protection, while requiring only a few external components.
Typical applications include point‑of‑load regulation, HDD core power, set‑top boxes, battery‑powered and USB‑powered devices, and DSL modems. The datasheet includes absolute maximum ratings, electrical characteristics, pin descriptions, connection diagrams and performance curves.
| Input voltage range | 3.0 V to 20 V |
|---|---|
| Output voltage range | 0.8 V to 18 V |
| Maximum output current | 1.5 A |
| Switching frequencies | 550 kHz (LM2738Y) or 1.6 MHz (LM2738X) |
| Shutdown (stand‑by) current | 400 nA |
| Package types | 8‑pin LLP and 8‑pin eMSOP |
The LM2738 has an ultra‑low standby shutdown current of 400 nA.
The LM2738Y operates at 550 kHz, while the LM2738X operates at 1.6 MHz.
It accepts an input voltage from 3.0 V up to 20 V.
The device is available in an 8‑pin LLP package and an 8‑pin eMSOP package.