Hw-133-v1.0 Datasheet 'link' Jun 2026

Always measure the output with a multimeter before connecting sensitive electronics (like an Arduino or ESP32) to ensure the voltage isn't set too high from the factory.

Note: this document is a technical monograph-style summary and practical guide for HW-133-v1.0 (hereafter “HW‑133”), covering specifications, electrical/physical interfaces, typical applications, integration guidance, troubleshooting, test procedures, and example designs. If you need PCB files, exact vendor part numbers, or firmware blobs, specify and I’ll provide a concise set of download steps and links.

The HW-133-V1.0 balances high switching frequencies with robust thermal architecture to deliver up to across wide voltage thresholds. Electrical & Performance Metrics Specification Value Notes / Conditions Input Voltage Range ( VINcap V sub cap I cap N end-sub ) 4.5V DC to 28V DC Absolute maximum is 30V DC Output Voltage Range ( VOUTcap V sub cap O cap U cap T end-sub ) 0.8V DC to 20V DC Fully adjustable via on-board potentiometer Maximum Output Current ( IOUTcap I sub cap O cap U cap T end-sub ) 3.0 Amperes Requires external cooling above 1.5A continuous Peak Conversion Efficiency Achieved at lower VINcap V sub cap I cap N end-sub VOUTcap V sub cap O cap U cap T end-sub Switching Frequency ( fSWf sub cap S cap W end-sub ) 1.0 MHz (typical) to 1.5 MHz (max) High-frequency operation minimizes inductor size Output Ripple Measured at 20 MHz bandwidth Quiescent Current ( IQcap I sub cap Q ) No-load state current draw Operating Temperature -40°C to +85°C Industrial grade thermal threshold 📌 Functional Pinout and Hardware Interface Hw-133-v1.0 Datasheet

If your application requires for high-accuracy analog sensors.

Safety and compliance badges lined another corner: EMI standards, thermal derating graphs, and a note about RoHS compliance. For Meridian’s product manager, those badges read as approvals; for Leo, they read as a checklist of promises to customers and auditors alike. The regulatory roadmap was a reminder that devices do not exist only in labs — they travel through customs, clinics, and living rooms, and must bow to laws and expectations at each border. Always measure the output with a multimeter before

Connect a stable DC supply matching your input constraints across IN+ and IN- .

HW-133-v1.0 (often identified as a variant of the ultra-small DC-DC buck converter) is a popular, highly efficient step-down module favored in the hobbyist and DIY electronics community. www.daraz.com.bd The HW-133-V1

: Always measure the output with a multimeter before connecting your load to ensure the potentiometer is set to the correct voltage.