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- Manufacturer: Pololu
- Order number: EXP-R25-176
- Manufacturer part number: 2123
- Availability: 26
- country of origin: US
- HS code: 90328900
- Weight (kg): 0.004
- input voltage: 2.7 V to 11.8 V
- fixed 5 V output with +5/-2% accuracy
- typical continuous output current: 500 mA to 1 A across most combinations of input and output voltages (Actual continuous output current depends on input and output voltages. See Typical Efficiency and Output Current section below for details.)
- power-saving feature maintains high efficiency at low currents (quiescent current is less than 0.2 mA)
- integrated over-temperature and short-circuit protection
- small size: 0.45″ × 0.65″ × 0.1″ (11 × 17 × 3 mm)
- During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it.
- The step-up/step-down regulator has four connections: shutdown (SHDN), input voltage (VIN), ground (GND), and output voltage (VOUT).
- The SHDN pin can be driven low (under 0.4 V) to power down the regulator and put it in a low-power state. The quiescent current in this sleep mode is dominated by the current in the 100k pull-up resistor from SHDN to VIN. With SHDN held low, this resistor will draw 10 µA per volt on VIN (for example, the sleep current with a 5 V input will be 50 µA). The SHDN pin can be driven high (above 1.2 V) to enable the board, or it can be connected to VIN or left disconnected if you want to leave the board permanently enabled.
- The input voltage, VIN, should be between 2.7 V and 11.8 V. Lower inputs can shut down the voltage regulator; higher inputs can destroy the regulator, so you should ensure that noise on your input is not excessive, and you should be wary of destructive LC spikes (see below for more information).
- The output voltage, VOUT, is fixed at 5 V. The output voltage can be up to 3% higher than normal when there is little or no load on the regulator. The output voltage can also drop depending on the current draw, especially when the regulator is boosting from a lower voltage (stepping up), although it should remain within 5% of the set output.
- The four connections are labeled on the back side of the PCB, and they are arranged with a 0.1″ spacing along the edge of the board for compatibility with standard solderless breadboards and perfboards and connectors that use a 0.1″ grid. You can solder wires directly to the board or solder in either the 4×1 straight male header strip or the 4×1 right-angle male header strip that is included.
- Size: 0.45″ × 0.65″ × 0.1″1
- Weight: 0.6 g1
- Minimum operating voltage: 2.7 V
- Maximum operating voltage: 11.8 V
- Maximum output current: 1 A2
- Output voltage: 5 V
- Reverse voltage protection?: N
- Maximum quiescent current: 0.2 mA3
- 1.Without included optional headers.
- 2.When stepping down; current available when stepping up depends on input and output voltages (over 500 mA in most configurations).
- 3.While enabled (SHDN = HIGH) with no load. Actual quiescent current depends on input voltage.