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Adjustable DC-DC Step Down Regulator 3A MP2307 Mini-360 Module

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Adjustable DC-DC Step Down Regulator 3A MP2307 Mini-360 Module

Click image to zoom.

Shown images are ilustrative only. Please refer to manufacturer's website and/or available datasheet for accurate information.

QtyUnit PriceLot Price
1C$2.0380C$2.04
2C$1.7020C$3.40
5C$1.4070C$7.04
10C$1.1510C$11.51
50C$0.8995C$44.98
Stock:45 ships today
If ordered and paid before noon EST
Canada ships daily from ON, USA 2x/wk from NY

Product Information
dipmicro Code DE4727
Added 2015-05-10
Manufacturer Generic
Stock Type New
Restockable? No
Shipping Weight 2.5g / 0.088oz
Ship Cost Canada CP O/S Letter C$4
Ship Cost USA USPS First Class $4
 
Technical Summary
More Info similar to (MP2307_r1.9.pdf)
Dimensions 17 x 11 x 4mm (0.67 x 0.43 x 0.157in)
Input Voltage 4.75V - 23V
Output Voltage 1V - 17V
Output Current 1.8A
Output Terminal pin holes 8.9mm (0.35in)

Specifications

  • Chipset: MP2307DN
  • Input voltage: 4.75V-23V
  • Output voltage: 1V-17V
  • Output current: peak 3A, continuous 1.8A
  • Efficiency: up to 95% (@ Vin=5V, Vout=3.3V, Iout=300mA)
  • Switching frequency: 340KHz
  • Output ripple: 30mV (no load)
  • Supply current: 1.5mA (no load)
  • Working temperature: -40℃ ~ +85℃
  • Module Size: 17*11*4mm
  • Mounting: 15.24 x 8.9mm (0.6 x 0.35in)

Notes

Looking at zoomed picture, this looks like typical application from datasheet - except R1 has been replaced by trimpot. Soft-start is enabled.

Internal Resistance

Despite it's tiny size this step-down DC regulator is no pushover. We tested one unit at 12.00Vin and 5.00Vout, with 4.6Ω load, voltage dropped to 4.98V and input current went to 0.5A. That is approx 90% efficiency and less than 20mΩ internal resistance.

Regulation

When set to 5.00V and input dropped to 5.00V, the output had 4.05V. Input range 6V to 20V, output voltage moved 5.00 - 5.02V.

Short Protection

This module can take some abuse too: when shorted, the input current went to 0.99A first and then slowly dropped to 0.3A as chip and inductor were heating up. After removing the short, the circuit worked as expected.

No-load Consumption

With input at 12V and output set to 5V, the module took 48mA without load. The 100uF/25V electrolytic capacitor lowered this to 21mA. With 47Ω output load, the input current was 82mA without 100uF, and 72mA with 100uF.

Other Notes

Built-in trim-pot is very sensitive and for fixed output applications we recommend to hold it's position by drop of glue or cut it out and replace with fixed value resistor. See the MP2307 datasheet for the math.

Conclusion

I would not recommend this module under 50mA load as linear regulator will do a better job in that range, but going over 50mA this regulator will work excellent. Also recommending additional electrolytic at least 100uF/25V at the input.