ITEM NAME:Mini DC-DC Buck Converter Step Down Module Adjustable Buck Module S3H9 Description: 100% Brand New and High Quality Model Name: DC-DC step-down module Input Voltage: 4.5V 24V Output adjust voltage: 0.8V12V Output fixed voltage: 3.3V 5V 9V 12V ( just need to shorting pads) Output Current: 3A (Max) Long time working Current: 2.1A Conversion efficiency: 97.5% (maximum 6.5v to 5v 0.7A) Switch frequency: 500kHZ Output ripple: 20mV (12V to 5V 3A) Enable control: high level work, the low level not work, the high level of 2-5V, the low level of about 0V. Default internal pull up to the input positive Welding hole spacing: 2.54mm Load regulation: Â ± 1% Voltage regulation rate: Â ± 0.5% Dynamic response speed: 5% 200uS Output short circuit protection: YES Input Reverse Protection: No Size: about 18mm * 10mm * 3.8mm (L * W * H) Features: 1: the use of new original US imports chip. 2: the maximum output current 3A, a long time running 2.1A, the margin is sufficient. 3A run for about 20 seconds into the chip to protect against overheating, can be cooled by the chip cooling work in 3A current. 3: the use of new design, circuit design does not require electrolytic capacitors and tantalum capacitors (electrolytic capacitor life is short, tantalum capacitor explosion risk). Using the current high-end circuit on the use of large-size solid-state ceramic capacitors (MCC) 3pcs. 4: The use of non-isolated DC synchronous rectification, circuit conversion efficiency is very high, in 6.5V to 5V 0.7A when the efficiency of up to 97.5%, 12V to 5V 1A time also reached 94%. 5: the use of one-piece forming inductors, ultra-low resistance, to maximize the conversion efficiency. Reduce heat, improve efficiency, lower than ordinary shielding inductance heat. 6: ultra-small size, 18 (long) * 10 (wide) * 3.8 (high) mm, mini. 7: ultra-low quiescent current, 12V input and output 5V voltage, with LED lights under the case of light - the static current is less than 0.45 mA. Connected to the car .Default internal pull up to the input positive. Output short circuit protection: YES. 4: The use of non-isolated DC synchronous rectification, circuit conversion efficiency is very high, in 6.5V to 5V 0.7A when the efficiency of up to 97.5%.
