582119 2119 - Pololu Step-Up/Step-Down Voltage Regulator S7V7F5

2119 - Pololu Step-Up/Step-Down Voltage Regulator S7V7F5

The S7V7F5 switching step-up/step-down regulator efficiently produces 5 V from input voltages between 2.7 and 11.8 V. Its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 5 V.
Prices are VAT included
€5.08 Price
€4.16 + VAT

Qty
 

Details

The S7V7F5 switching step-up/step-down regulator efficiently produces 5 V from input voltages between 2.7 and 11.8 V. Its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 5 V. The very compact (0.35″ × 0.475″) module can supply up to 1 A when stepping down and about 500 mA when stepping up.

Overview

The Pololu step-up/step-down voltage regulator S7V7F5 is a switching regulator (also called a switched-mode power supply (SMPS) or DC-to-DC converter) that uses a buck-boost topology. It takes an input voltage from 2.7 V to 11.8 V and increases or decreases the voltage to a fixed 5 V output with a typical efficiency of 90%.

This flexibility in input voltage is especially well-suited for battery-powered applications in which the battery voltage begins above 5 V and drops below as the battery discharges. Without the typical restriction on the battery voltage staying above the required voltage throughout its life, new battery packs and form factors can be considered. For instance, a 4-cell battery holder, which might have a 6 V output with fresh alkalines but a 4.8 V nominal voltage with NiMH cells and a 4.0 V output with partially discharged cells, can now be used for a 5 V circuit. In another typical scenario, a disposable 9 V battery powering a 5 V circuit can be discharged to under 3 V instead of cutting out at 6 V, as with typical linear or step-down regulators.

In typical applications, this regulator can deliver about 1 A continuous when the input voltage is higher than 5 V (stepping down) and 500 mA continuous when the input is lower than 5 V (stepping up). The regulator has over-voltage, under-voltage, and short circuit protection, and thermal shutdown prevents damage from overheating; the board does not have reverse-voltage protection.

Features

  • input voltage: 2.7 to 11.8 V
  • fixed  5V output with +5/-2% accuracy
  • typical continuous output current: 1 A when stepping down; 500 mA when stepping up (Actual continuous output current depends on input voltage. See Typical Efficiency and Output Current section below for details)
  • power-saving feature maintains high efficiency at low currents
  • integrated over-temperature protection
  • small size: 0.35″ × 0.475″ × 0.1″ (9 × 12 × 3 mm)

Using the Regulator

During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it.

Connections

The step-up/step-down regulator has just three connections: the input voltage (VIN), ground (GND), and the output voltage (VOUT). These three 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 3×1 straight male header strip or the 3×1 right-angle male header strip that is included.

The input voltage, VIN, should be between 2.7 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 regulated to a fixed 5 V, but it can be as high as 5.2 V when there is little or no load on the regulator.

Typical Efficiency and Output Current

The efficiency of a voltage regulator, defined as (Power out)/(Power in), is an important measure of its performance, especially when battery life or heat are concerns. As shown in the graph below, this switching regulator typically has an efficiency of 85% to 95%. A power-saving feature maintains these high efficiencies even when the regulator current is very low.

The maximum achievable output current of the board varies with the input voltage but also depends on other factors, including the ambient temperature, air flow, and heat sinking. The graph below shows output currents at which this voltage regulator’s over-temperature protection typically kicks in. These currents represent the limit of the regulator’s capability and cannot be sustained for long periods, so the continuous currents that the regulator can provide are typically several hundred milliamps lower, and we recommend trying to draw no more than about 1 A from this regulator throughout its input voltage range.

LC Voltage Spikes

When connecting voltage to electronic circuits, the initial rush of current can cause voltage spikes that are much higher than the input voltage. If these spikes exceed the regulator’s maximum voltage, the regulator can be destroyed. If you are connecting more than about 9 V, using power leads more than a few inches long, or using a power supply with high inductance, we recommend soldering a 33 μF or larger electrolytic capacitor close to the regulator between VIN and GND. The capacitor should be rated for at least 16 V.

More information about LC spikes can be found in our application note, Understanding Destructive LC Voltage Spikes.

 

Specifications

Part. No. : 2119

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Questions on 2119 - Pololu Step-Up/Step-Down Voltage Regulator S7V7F5

No questions asked yet

Register or Login to ask a question.
Register or Login to ask a question.
  1. NCP1402-3.3V Step-Up Breakout

    710967 NCP1402-3.3V Step-Up Breakout

    The NCP1402 is a 3.3V DC-DC converter. The breakout board will accept voltage inputs between 1 and 3 Volts (such as 1 or 2 AAfalse
    Excl. Tax:
    €5.13
    Incl. Tax:
    €6.26
      Compare
  2. NCP1402-5V Step-Up Breakout

    710968 NCP1402-5V Step-Up Breakout

    The NCP1402 is a 5V DC-DC converter. This breakout board will accept voltage inputs between 1 and 4 Volts and output a constafalse
    Excl. Tax:
    €5.13
    Incl. Tax:
    €6.26
      Compare
  3. 2121 - Pololu 5V Step-Up/Step-Down Voltage Regulator S10V4F5

    582505 2121 - Pololu 5V Step-Up/Step-Down Voltage Regulator S10V4F5

    This switching regulator uses the SEPIC topology to produce 5 V from input voltages between 2.5 V and 18 V. The wide input rafalse
    Excl. Tax:
    €4.07
    Incl. Tax:
    €4.97
      Compare
  4. 2560 - Pololu Adjustable Step-Up Voltage Regulator U1V11A

    582560 2560 - Pololu Adjustable Step-Up Voltage Regulator U1V11A

    This compact U1V11A switching step-up (or boost) voltage regulator efficiently boosts input voltages as low as 0.5 V to an adfalse
    Excl. Tax:
    €4.47
    Incl. Tax:
    €5.45
      Compare
  5. Adjustable DC/DC Power Converter (1.25V - 35V/3A)

    807664 Adjustable DC/DC Power Converter (1.25V - 35V/3A)

    This is a DC/DC step-down voltage regulator that converts input voltage between 3.2V and 40V into a smaller voltage between 1false
    Excl. Tax:
    €3.20
    Incl. Tax:
    €3.90
      Compare
  6. 2865 - Pololu 5V, 6A Step-Down Voltage Regulator D24V60F5

    807897 2865 - Pololu 5V, 6A Step-Down Voltage Regulator D24V60F5

    This synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5false
    Excl. Tax:
    €16.27
    Incl. Tax:
    €19.85
      Compare
  7. 2850 - Pololu 5V, 2.5A Step-Down Voltage Regulator D24V25F5

    342850 2850 - Pololu 5V, 2.5A Step-Down Voltage Regulator D24V25F5

    This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces ifalse
    Excl. Tax:
    €8.94
    Incl. Tax:
    €10.91
      Compare
  8. 2851 - Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5

    342851 2851 - Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5

    This step-down (buck) regulator generates a fixed 5 V output from input voltages up to 38 V. It is a switching regulator (alsfalse
    Excl. Tax:
    €12.19
    Incl. Tax:
    €14.87
      Compare
  9. 2577 - Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12

    342577 2577 - Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12

    This powerful step-up/step-down regulator efficiently produces a fixed 12 V output from input voltages between 3 V and 30 V wfalse
    Excl. Tax:
    €11.18
    Incl. Tax:
    €13.64
      Compare
  10. 2834 - Pololu 12V, 1A Step-Down Voltage Regulator D24V10F12

    342834 2834 - Pololu 12V, 1A Step-Down Voltage Regulator D24V10F12

    The compact D24V10F12 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 1false
    Excl. Tax:
    €6.10
    Incl. Tax:
    €7.44
      Compare
  11. 2831 - Pololu 5V, 1A Step-Down Voltage Regulator D24V10F5

    342831 2831 - Pololu 5V, 1A Step-Down Voltage Regulator D24V10F5

    The compact D24V10F5 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 5false
    Excl. Tax:
    €6.10
    Incl. Tax:
    €7.44
      Compare
  12. 2830 - Pololu 3.3V, 1A Step-Down Voltage Regulator D24V10F3

    342830 2830 - Pololu 3.3V, 1A Step-Down Voltage Regulator D24V10F3

    The compact D24V10F3 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 3.false
    Excl. Tax:
    €6.10
    Incl. Tax:
    €7.44
      Compare
  13. 2843 - Pololu 5V, 500mA Step-Down Voltage Regulator D24V5F5

    342843 2843 - Pololu 5V, 500mA Step-Down Voltage Regulator D24V5F5

    The compact D24V5F5 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 5 Vfalse
    Excl. Tax:
    €4.46
    Incl. Tax:
    €5.44
      Compare
  14. 2587 - Breakout Board for microSD Card with 3.3V Regulator and Level Shifters

    342587 2587 - Breakout Board for microSD Card with 3.3V Regulator and Level Shifters

    This compact board breaks out the pins of a microSD card connector necessary to interface with the card through SPI (Serial Pfalse
    Excl. Tax:
    €4.49
    Incl. Tax:
    €5.48
      Compare
  15. 2855 - Pololu 12V, 2.2A Step-Down Voltage Regulator D24V22F12

    342855 2855 - Pololu 12V, 2.2A Step-Down Voltage Regulator D24V22F12

    This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 36 V and efficiently reduces ifalse
    Excl. Tax:
    €8.11
    Incl. Tax:
    €9.89
      Compare
  16. 2812 - Big Pushbutton Power Switch with Reverse Voltage Protection, MP

    342812 2812 - Big Pushbutton Power Switch with Reverse Voltage Protection, MP

    The Pololu Pushbutton Power Switches are sophisticated power control alternatives to bulky mechanical switches.
    Excl. Tax:
    €4.31
    Incl. Tax:
    €5.26
      Compare

Price Match



* Required Fields