Demand Peripherals     Robotics and Automation Made Easy

SMR5: 5 Volt Switching Regulator

The SMR5 is a 5 Volt, 3 Ampere switching voltage regulator with very low ripple.


- 5 Volts at 3 Amps continuous (4 Amps peak)
- Ripple less than 5 mVolts at 3 Amps (typical)
- Efficiency of 90% at full load (typical)
- Vin from 7 to 20 Volts
- Reverse polarity protection
- Input from 5.5/2.1 mm barrel connector or screw terminals
- Output on two sets of screw terminals
- Mounting holes for simple, secure mounting

The SMR5 card was designed with robotics and automation in mind. The SMR5 takes advantage of its larger size by adding output filtering which is not possible on cheaper regulator cards. Four mounting holes make it easy to securely mount the card to a chassis, and flexible input connections and multiple output connectors make it easy to use.

Power is crucial on battery powered robots and the SMR5's high efficiency makes it perfect for powering your robot's processor card and other electronics. The SMR5 is a great companion to our externally powered USB hub card.

The schematic and layout of the SMR5 are shown below. The Eagle schematic and board files are available here: smr5.sch and smr5.brd. The bill-of-materials is available here: smr5.txt.




FPGA Defined Peripherals
User Interface
FPGA Configuration
FPGA Buttons & LEDs
Text LCD and Keypad
Quad WS2812 Interface
Quad Slide Pot
Tone Generator
IR Recv/Xmit
6 Digit LCD
RC Decoder
Keyfob RF Decoder
Rotary Encoder Interface
Quad Touch Interface
Motion Control
Dual DC Motor Controller
Dual Quadrature Decoder
Quad 13 Bit Servo
Bipolar Stepper Controller
Unipolar Stepper Controller
Simple Input / Output
Quad Binary Output
Quad Binary Input
Octal Input/Output
32 Channel Binary Output
32 Channel Binary Input
Octal 12-bit ADC
Quad Ping))) Interface
Octal SRF04 Interface
Quad Event Counter
Generic I2C
Generic SPI
Octal 8-Bit DAC
Quad Digital Potentiometer
Quad PWM Output
Quad PWM Input
4 Bit Pattern Generator
Real Time Clock
Dual Watchdog Timers

Interface Cards
User Interface
Audio Amplifier
IR Recv/xmit
Six Digit LCD Display
Keyfob RF Receiver
Rotary Encoder
Quad Switch Card
Text LCD / keypad
Quad Slide Pot
Quad Touch Interface
Motion Control
Dual 7-amp H-bridge
Quad Open Drain Driver
Quad 10 Amp Relay Card
Input / Output
Octal 8-Bit DAC
Quad Digital Potentiometer
Octal 12-bit ADC
Octal SRF04
Generic I2C
Generic SPI
USB 2.0 Hub
Real Time Clock
Slot Expander
Octal Input/Output
32 Channel Input
32 Channel Output
Power Distribution Card
15 Amp Power Distribution
5 Volt Switching Regulator
ATX Power Break-Out Card
Disk Drive Power Break-Out
MP43 Aluminum Mounting Plate
WW2 Prototyping Card
WW1 Small Prototyping Card