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Small green circuit board with blue potentiometer and soldered pins

Ruth's sister

Ruth's sister Adjustable Step-down Buck Converter Module 5A internal power cable

SKU CH-6H3G-2K8GZ

Adjustable step-down buck converter module delivers 0.8 V to 30 V at up to 5 A with 95 % efficiency from a 5 V to 32 V input

  • Adjustable 0.8 V to 30 V output for flexible voltage control
  • 5 A maximum current handles demanding loads reliably
  • 95 % conversion efficiency minimises heat and power loss
  • Compact 51 × 26.3 × 14 mm size fits tight enclosures
  • Wide –40 °C to +85 °C operating range suits harsh environments

Adjustable Step-down Buck Converter

This Ruth's sister module is a non-isolated step-down regulator with asynchronous rectification that accepts 5v-32v input and delivers an adjustable 0.8v-30v output at up to 5A. It operates at a 300kHz switching frequency and achieves 95% conversion efficiency. Each unit undergoes a two-hour aging test before shipment.

Suited for custom power projects

Builders who need a compact buck converter with constant current and voltage control for prototyping or repair work will find the adjustable blue potentiometer and original Ti operational amplifier useful. Buyers who require isolated topologies, higher input ranges or synchronous rectification should look at other modules.

Sustained-load behaviour

The load adjustment rate is ±0.5% and the voltage regulation rate is ±2.5%, while output ripple measures 50mV at 20m bandwidth using a Sanyo low-ESR filter capacitor. The operating temperature span runs from -40 to +85 degrees, and the small 51 * 26.3 * 14mm footprint keeps calorific value low during continuous operation.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 80% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What input voltage range must my existing power source provide for this 5 A buck converter to operate?

The module accepts an input voltage from 5 V up to 32 V, so your supply must fall within that window.

If I keep a legacy 5 V rail in the same chassis, will the 300 kHz switching frequency of this module create interference?

The converter switches at 300 kHz with a typical output ripple of 50 mV; proper layout and the onboard Sanyo low-ESR capacitors keep noise low.

After wiring the module, how can I verify that the output is regulating correctly?

Measure the output with a multimeter — it should stay within ±2.5 % of the set voltage and the ripple should be around 50 mV at full load.

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