LM2596 SMD:
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92%( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ +85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
LM2596 DIP:

Model/Name : LM2596S DC-DCBuck module

Input voltage : 3.2V ~ 40V
The output voltage : 1.25V ~ 35V
Output Current : 3A( Max)
Conversion efficiency : 92%( Highest )
Output ripple : <30mV
Switching frequency : 65KHz
Working temperature : -forty Five~ +85
Size : 43mm * 21mm * 14mm( Long*Width*High )
LM2596HVS:
Type /name:LM2596HVS DC-DC step-down module
Input Voltage:4.5V ~ 53V
Output Voltage:3V ~ 40V
Output Current:3A (max)
Conversion efficiency:92%(the highest)
Output Ripple:<30mV
Switching frequency:150KHz
Operating Temperature:-45 ° ~ +85 °
Size:43mm * 21mm * 14mm (L * W* H)
LM2596 LED:
the Module Properties: non - isolated constant current and voltage of the Module
Rectification: non - synchronous Rectification
Input voltage: 7 v - 35 v
the Output voltage: 1.25 V - 30 V
the Output current: adjustable maximum 3 a
Conversion efficiency: 92% (the highest)
Switching frequency 150 KHZ
the Output ripple: 50 mv (Max) 20 m bandwidth
the Load Regulation: plus or minus 0.5%
Voltage Regulation: plus or minus 2.5%
Operating Temperature: - 40 ° to + 85 °
LM2596 Display:
Module Model:LM2596 Buck Converter + Voltmeter
Cutting Size: 66mm x 35mm
Input Voltage: DC 4.0~40V
Output Voltage: 1.25V~37V (continuously adjustable the input voltage must be 1V higher than the output voltage)
Output Current: 2A(normal and stable) 3A Max.
Ripple Frequency: About 150Khz
Ripple Peak: About 100mV
Display Color: Red
Voltage Meter Error: ±0.1V
Measure Range:4~40V (for measure accurately please ensure that the input voltage is more than 4V)
IN+: Input Postive
IN-: Input Negative
Out+: Output Postive
Out-: Ouput Negative