Output voltage Typical max output current Input voltage range 1 Size 7.5 V 600 mA 7.6 V – 36 V 0.34″ × 0.54″ Note 1: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
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Step-Down Voltage Regulator D24V7Fx, bottom view with dimensions.
The D24V7Fx family of synchronous buck (step-down) voltage regulators generate lower voltages from input voltages as high as 36 V while supporting maximum continuous output currents of 600 mA across all combinations of input and output voltages. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters), which makes them much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. This family includes six versions with fixed output voltages ranging from 3.3 V to 12 V:
| Regulator | Output voltage | Max continuous output current |
Input voltage range1 | Size | Special features | Price |
|---|---|---|---|---|---|---|
| #5592: D24V7F3 | 3.3 V | 600 mA | 4 V – 36 V | 0.34″ × 0.54″ | Short-circuit protection, thermal shutdown |
$2.75 |
| #5593: D24V7F5 | 5 V | 5.1 V – 36 V | ||||
| #5594: D24V7F6 | 6 V | 6.1 V – 36 V | ||||
| #5595: D24V7F7 | 7.5 V | 7.6 V – 36 V | ||||
| #5596: D24V7F9 | 9 V | 9.2 V – 36 V | ||||
| #5597: D24V7F12 | 12 V | 12.2 V – 36 V | ||||
| Note 1: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information. | ||||||
The regulators feature short circuit protection and thermal shutdown protection, which helps prevent damage from overheating. The boards do not have built-in protection against reverse voltage, but reverse-voltage protection modules are available for adding that functionality.
We manufacture these boards in-house at our Las Vegas facility, so we can make these regulators with customised components to better meet the needs of your project, such as by customising the output voltage. If you are interested in customisation, please contact us for a quote.
This item is the D24V7F7, which outputs a fixed 7.5 V.
7.5V, 600mA Step-Down Voltage Regulator D24V7F7. |
7.5V, 600mA Step-Down Voltage Regulator D24V7F7. (1) |
Step-Down Voltage Regulator D24V7Fx, bottom view. |
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This regulator has three connections: input voltage (VIN), ground (GND), and output voltage (VOUT).
The input voltage, VIN, powers the regulator. Voltages between 4 V and 36 V can be applied to VIN, but generally the effective lower limit of VIN is VOUT plus the regulator’s dropout voltage, which varies approximately linearly with the load (see below for graphs of the dropout voltage as a function of the load). Additionally, please be wary of destructive LC spikes (see below for more information).
VOUT is the regulated output voltage.
The three connections are labelled on the back side of the PCB and are arranged with a 0.1″ spacing along the edge of the board for compatibility with solderless breadboards, connectors, and other prototyping arrangements that use a 0.1″ grid. You can solder wires or 0.1″ header pins directly to the board. Note: header pins are not included with this product, but 1×3 straight male headers and 1×3 right-angle male headers are available separately.
D24V7Fx step-down voltage regulators, soldered with straight and right-angle headers (not included), on a breadboard.
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.
Typical efficiency of the 7.5V Step-Down Voltage Regulator D24V7F7.
The quiescent current is the current the regulator uses just to power itself, and the graph below shows this for the different regulator versions as a function of the input voltage.
Typical quiescent current of the Step-Down Voltage Regulator D24V7Fx.
The dropout voltage of a step-down regulator is the minimum amount by which the input voltage must exceed the regulator’s target output voltage in order to ensure the target output can be achieved. For example, if a 5 V regulator has a 1 V dropout voltage, the input must be at least 6 V to ensure the output is the full 5 V. Generally speaking, the dropout voltage increases as the output current increases. (Note that for the 3.3 V version, the dropout is at least 700 mV due to the regulator’s 4 V minimum operating voltage.) The graph below shows the dropout voltages for the different members of this regulator family as a function of output current.
Typical dropout voltage of the Step-Down Voltage Regulator D24V7Fx.
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 (36 V), the regulator can be destroyed. In our tests with typical power leads (~30″ test clips), we observed spikes approaching 36 V at input voltages approaching 20 V. Power supplies or leads with high inductance will make these spikes worse. An electrolytic capacitor (33 μF is a good starting point) can be added close to the regulator between VIN and GND to help suppress these spikes.
More information about LC spikes can be found in our application note, Understanding Destructive LC Voltage Spikes.
| Size: | 0.34″ × 0.54″ × 0.16″ |
|---|---|
| Weight: | 0.5 g |
| Minimum operating voltage: | 7.6 V1 |
|---|---|
| Maximum operating voltage: | 36 V |
| Maximum output current: | 600 mA |
| Output voltage: | 7.5 V |
| Reverse voltage protection?: | N |
| Maximum quiescent current: | 0.01 mA2 |
| Output type: | fixed 7.5V |
| PCB dev codes: | reg35b |
|---|---|
| Other PCB markings: | 0J15775 |
This DXF drawing shows the locations of all of the board’s holes.
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