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D30V3x Step-Down Voltage Regulators
The D30V3x line of synchronous buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 45 V. 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. These regulators can typically support continuous output currents between 1 A and 4 A, depending on the input voltage and output voltage. In general, the available output current decreases as the input and output voltages increase.
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D30V3x line of step-down voltage regulators. From left to right: D30V30Fx, D30V30MASx, D30V33MASx. |
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This line consists of the D30V30Fx family of fixed output voltages ranging from 3.3 V to 15 V and two families of adjustable versions that allow the output voltage to be set with a precision 11-turn potentiometer. Each adjustable option is available with or without an adjustable low-voltage cutoff (also set through a precision 11-turn potentiometer on the versions that have it). The adjustable families are the D30V30MAx, which is the more compact of the two thanks to its double-sided assembly, and the D30V33MAx, which includes larger through-holes for terminal blocks and can do slightly more current thanks to its larger surface area. The following table shows all of the members of the D30V3x line:
| Regulator | Output voltage | Typical max output current1 |
Input voltage2 | Adjustable low-voltage cutoff |
Size | Price |
|---|---|---|---|---|---|---|
| #4891: D30V30F3 | 3.3 V | 3.7 A | 3.3 V – 45 V | 0.7″ × 0.8″ | $12.95 | |
| #4892: D30V30F5 | 5 V | 3.4 A | 5 V – 45 V | $12.95 | ||
| #4893: D30V30F6 | 6 V | 3.3 A | 6 V – 45 V | $13.95 | ||
| #4894: D30V30F7 | 7.5 V | 3 A | 7.5 V – 45 V | $13.95 | ||
| #4895: D30V30F9 | 9 V | 2.9 A | 9 V – 45 V | $13.95 | ||
| #4896: D30V30F12 | 12 V | 2.8 A | 12 V – 45 V | $13.95 | ||
| #4897: D30V30F15 | 15 V | 2.7 A | 15 V – 45 V | $13.95 | ||
| #4874: D30V30MASCMA | 4.2 V – 15 V | 3 A | 4.2 V – 45 V | 0.6″ × 1.0″ | $19.95 | |
| #4875: D30V30MAS | $16.95 | |||||
| #4854: D30V33MASCMA | 4.2 V – 15 V | 3.3 A | 4.2 V – 45 V | 0.9″ × 1.2″ | $20.95 | |
| #4855: D30V33MAS | $17.95 | |||||
| 1At 30 V in. Actual achievable continuous output current is a function of input and output voltages and is limited by thermal dissipation. | ||||||
| 2Operating voltage must be higher than the set output voltage and is subject to dropout voltage considerations. | ||||||
The regulators have reverse voltage protection up to 40 V, input under-voltage lockout, over-current protection, and short-circuit protection. A thermal shutdown feature also helps prevent damage from overheating and a soft-start feature limits the inrush current and gradually ramps the output voltage on startup.
If you need higher input voltages, consider the similar D36V28Fx family, which works up to 50 V in, and if you need more output current, consider the similar D36V50Fx family of step-down voltage regulators.
We manufacture these boards in-house at our Las Vegas facility, which gives us the flexibility to make these regulators with customized components to better meet the needs of your project. For example, if you have an application where the input voltage will always be below 20 V and efficiency is very important, we can make these regulators a bit more efficient at high loads by replacing the 40V reverse voltage protection MOSFET with a 20V one. We can also customize the output voltage. If you are interested in customization, please contact us for a quote.
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Subcategories
Compact synchronous buck voltage regulators with fixed output voltages. They take input voltages up to 45 V and can provide typical maximum continuous output currents between 2 A and 4 A, depending on the combination of input and output voltage.
Compact synchronous buck voltage regulators with precision-adjustable output voltages, available with or without adjustable low-voltage cutoff. 3.3 V to 45 V in with typical maximum continuous output currents between 1 A and 4 A, depending on the combination of input and output voltage.
Larger synchronous buck voltage regulators with precision-adjustable output voltages and holes for terminal blocks, available with or without adjustable low-voltage cutoff. 3.3 V to 45 V in with typical maximum continuous output currents between 1.3 A and 4.3 A, depending on the combination of input and output voltage.
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