: Before connecting any load, connect the input power to the terminals. Use a multimeter on the
Limits output current to prevent chip damage.
If you’ve recently purchased an Arduino starter kit or are digging through a box of spare modules, you’ve likely stumbled upon a small PCB labeled .
Regulated, step-down DC output voltage (0.8V to 20V).
There is no reverse-polarity protection. Connecting the input wires backward will likely destroy the module instantly. AliExpress
3.0 A max peak (2.0 A continuous recommended without extra cooling) Switching Frequency 1.0 MHz (Typical) to 1.5 MHz (Maximum) Output Ripple Quiescent Current Continuous Power Dissipation Operating Temperature -40 °C to +85 °C Dimensions
Because this is a pure buck step-down architecture, the input voltage must remain at least
Traditional linear regulators (like the LM7805) burn off excess voltage directly as waste heat. For example, dropping 12V down to 5V at 1A forces a linear regulator to dissipate 7 Watts of heat, requiring massive heatsinks. The HW-133-V1.0 uses pulse-width modulation (PWM) fast-switching cycles to step down voltage. Under the same conditions, it operates at roughly 90% efficiency, wasting less than 0.6 Watts of power. Minimal Ripple and Compact Design
Power down the source, connect your load to the output terminals, and secure the circuit. Typical Hardware Applications
Connect to the positive terminal of the raw power source (4.5V – 28V).
To get the most out of the HW-133-V1.0 datasheet, designers and engineers should follow best practices, including:
Common ground return path shared with input power.
Before diving into the details, here is a summary of the most critical parameters from the HW-133-v1.0 datasheet. A thorough understanding of these specs is the first step to using the module effectively.
: Before connecting any load, connect the input power to the terminals. Use a multimeter on the
Limits output current to prevent chip damage.
If you’ve recently purchased an Arduino starter kit or are digging through a box of spare modules, you’ve likely stumbled upon a small PCB labeled .
Regulated, step-down DC output voltage (0.8V to 20V). Hw-133-v1.0 Datasheet
There is no reverse-polarity protection. Connecting the input wires backward will likely destroy the module instantly. AliExpress
3.0 A max peak (2.0 A continuous recommended without extra cooling) Switching Frequency 1.0 MHz (Typical) to 1.5 MHz (Maximum) Output Ripple Quiescent Current Continuous Power Dissipation Operating Temperature -40 °C to +85 °C Dimensions
Because this is a pure buck step-down architecture, the input voltage must remain at least : Before connecting any load, connect the input
Traditional linear regulators (like the LM7805) burn off excess voltage directly as waste heat. For example, dropping 12V down to 5V at 1A forces a linear regulator to dissipate 7 Watts of heat, requiring massive heatsinks. The HW-133-V1.0 uses pulse-width modulation (PWM) fast-switching cycles to step down voltage. Under the same conditions, it operates at roughly 90% efficiency, wasting less than 0.6 Watts of power. Minimal Ripple and Compact Design
Power down the source, connect your load to the output terminals, and secure the circuit. Typical Hardware Applications
Connect to the positive terminal of the raw power source (4.5V – 28V). Regulated, step-down DC output voltage (0
To get the most out of the HW-133-V1.0 datasheet, designers and engineers should follow best practices, including:
Common ground return path shared with input power.
Before diving into the details, here is a summary of the most critical parameters from the HW-133-v1.0 datasheet. A thorough understanding of these specs is the first step to using the module effectively.