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Pololu Step-Up/Step-Down Voltage Regulator S7V8F3 - 3,3V 1A

Converter module pulse power. Input voltage 2.7 V to 11.8 V. Output voltage: 3.3 V. Maximum output current is 1 A.

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PLL-01427

Pololu

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Price 23,90 zł

Description of product: Pololu S7V8F3 Converter, step-up/step-down 3.3 V 1A

S7V8F3 Converter is a switching regulator type voltage step-up/step-down (buck-boost). Converts an input voltage of 2.7 V to 11.8 V to output 3.3 V with an average efficiency of 80%. The input voltage can be below, above or equal to the input values, which makes the layout functional and versatile. Flexibility for input voltages, making the system works perfectly in systems powered by batteries, which require a stable voltage supply and its independence from the battery charge level.

 

Examples of application

  • Maintaining a stable voltage of 3.3 V in a system operating with a basket with four NiMh batteries (fingers) that give a fully charged voltage of about. 6, a partially discharged below 3.3 V.
  • Power supply circuits with voltage of 3.3 V from a single cell Li-Po during the entire discharge cycle of the battery.
  • Power chip 3.3 V from the 9V batteries that are partially discharged can give a voltage below what is needed.

      

In the standard application system allows current up to 1A in step-down, i.e. when the supply voltage is higher than the desirable output voltage. When the input voltage is below the output mode (step-up), the maximum output current of the Converter decreases in accordance with the schedule posted in the picture below.

Wydajność prądowa przetwornicy w funkcji napięcia wejściowego

The graph shows the dependence of the maximum power load from the input voltage.

Method of application

The module has four pins: input voltage VIN, output voltage VOUT, ground to GND and pin SHDN of switching the system to standby state.

  • VIN - input voltage from 2.7 V to 11.8 V. When the lower voltage of the inverter does not start. Above, can eventually damage the chip.
  • GND - the ground.
  • VOUT - output voltage 3.3 V
  • SHDN - input low (<0.4 V) puts the system into low power mode. Current consumption in sleep mode depends on the resistor (100 ohms) podciągającego SHDN to VIN and is 10 uA per volt. For example, if the voltage VIN is 5 V, the circuit will consume current value of 50 uA. If the low-power state is not used, SHDN can be left disabled.

 

Connectors respectively signed on the Board. Terminal pitch is 2.54 mm (popular goldpin connectors). The module can be mounted on the contact plate, to connect with wires or solder in a special printed circuit Board.

The efficiency of the Converter

Efficiency is defined as the ratio of input power to output power (Pout/Pin). This parameter is of particular importance when running on battery power when it is important that the system worked as long as possible on a single charge. The efficiency of the Converter depends on the strength of the current flow and the input voltage (chart below). On average 80-95%, allowing you to use almost the maximum energy from the battery.

The fitness of the regulator for an output voltage of 3.3 V.

Jumping voltages (pins)

In electronic circuits, the current run can lead to the emergence of so-called pins, that is, sharp voltage spike to a value above a certain level. If the amplitude of the pin exceeds the permissible value of the controller, it can fail. Therefore, if the system will be powered with voltage not higher than 9 V or the load will have high inductance, we highly recommend you wlutowanie capacitor value of 33uF or higher, as close as possible to the system between VIN and GND.

Specification of the Converter Pololu S7V8F3

  • Input voltage: from 2.7 V to 11.8 V
  • Maximum output current:
    • 1 A (step-down)
    • 0.5 A (step-up)
  • Output voltage: 3.3 V
  • Temperature protection
  • The short-circuit protection
  • Dimension: 11.5 x 16.5 x 2.54 mm
  • Weight: 0.6 g (without connectors)

  • Length 17 mm
  • Width 12 mm
  • Height 3 mm
  • Voltage to 2.7 V
  • Voltage from 11.8 V
  • Voltage output from 3.3 V
  • Output voltage to 3.3 V
  • Nominal output voltage 3.3 V
  • Current 1 A
  • Stabilizer - Type2 switching
  • Stabilizer - Type: step-up/down

SAME DAY SHIPPING

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The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the websitehttp://www.kiedy-przelew.pl/).

 

The table presents available forms of delivery in Poland

 

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Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

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14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!

 

  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.