The ADP2381 is a synchronous step-down regulator with an input voltage range of 4.5V to 20V. It features an integrated 44 mΩ high-side MOSFET, a 0.6V ± 1% temperature-stable reference voltage, a continuous output current of 6A, and programmable switching frequency. It is suitable for applications in communication infrastructure, networking and servers, industrial and instrumentation, healthcare and medical, and DC-to-DC point of load conversion.
The ADP2381 is a current‑mode, synchronous step‑down DC‑DC regulator that integrates a 44 mΩ high‑side MOSFET and a low‑side driver. It operates from an input voltage of 4.5 V to 20 V and delivers up to 6 A of continuous output current, with an adjustable output voltage from 0.6 V to 90 % of the input.
The data sheet provides full specifications, pin descriptions, typical performance curves, and design examples, including component selection, PCB layout recommendations, and protection features such as UVLO, OVP, OCP, and thermal shutdown. It also includes ordering information for the 16‑lead TSSOP_EP package.
| Input voltage range | 4.5 V to 20 V |
|---|---|
| Continuous output current | 6 A |
| Switching frequency range | 250 kHz to 1.4 MHz |
| Quiescent current (typical) | 2.8 mA |
| Power‑good output low voltage | 125–200 mV |
| Thermal shutdown threshold | 150 °C |
| Package | 16‑lead TSSOP_EP |
The regulator accepts an input voltage from 4.5 V up to 20 V.
The switching frequency is set by the RT pin; a resistor to ground programs it between 250 kHz and 1.4 MHz, while leaving the pin open or grounded selects fixed frequencies of 550 kHz or 290 kHz.
The device provides programmable undervoltage lockout (UVLO), overvoltage protection (OVP), over‑current protection (OCP), and thermal shutdown (TSD).
It is available in a 16‑lead TSSOP_EP package.