We’re pleased to introduce the D30V3x line of step-down voltage regulators, our favorite new buck regulators for applications that need up to a few amps from input voltages up to 45 V. They can deliver between 1 A and 4 A of output current, depending on the input and output voltages, with very low dropout voltages. They also feature a power-good output for identifying when the output voltage is not being maintained, an enable pin with a precise threshold for turning off the regulator, and a soft-start feature that limits in-rush current and gradually ramps the output voltage on startup. The regulators include protections against reverse voltage (up to 40 V), input under-voltage, over-temperature, over-current, and short circuits.
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The D30V3x line consists of the following three families:
- The D30V30Fx regulators are compact, fixed-output versions available with output voltages from 3.3Â V to 15Â V.
- The D30V30MAx regulators are compact, double-sided adjustable versions, with a precision-adjustable output voltage from 4.2Â V to 15Â V and an optional adjustable low-voltage cutoff.
- The D30V33MAx regulators are larger adjustable versions with holes for terminal blocks and slightly higher maximum output current. These also have a precision-adjustable 4.2Â V to 15Â V output and an optional adjustable low-voltage cutoff.
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Output voltage settings for the 4.2-15V Fine-Adjust Step-Down Voltage Regulator D30V3xMASx. |
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We’ve actually had the fixed-voltage versions available for a few months already, but we’ve just expanded the range with the release of the adjustable versions, which have multi-turn potentiometers for precisely setting the output voltage and/or low voltage cutoff. The following table shows all of the members of the D30V3x family:
| Regulator | Output voltage | Typical max output current1 |
Input voltage2 | Adjustable low-voltage cutoff |
Size | |
|---|---|---|---|---|---|---|
| #4891: D30V30F3 | 3.3 V | 3.7 A | 3.3 V – 45 V | 0.7″ × 0.8″ | ||
| #4892: D30V30F5 | 5 V | 3.4 A | 5 V – 45 V | |||
| #4893: D30V30F6 | 6 V | 3.3 A | 6 V – 45 V | |||
| #4894: D30V30F7 | 7.5 V | 3 A | 7.5 V – 45 V | |||
| #4895: D30V30F9 | 9 V | 2.9 A | 9 V – 45 V | |||
| #4896: D30V30F12 | 12 V | 2.8 A | 12 V – 45 V | |||
| #4897: D30V30F15 | 15 V | 2.7 A | 15 V – 45 V | |||
| #4874: D30V30MASCMA | 4.2 V – 15 V | 3 A | 4.2 V – 45 V | 0.6″ × 1.0″ | ||
| #4875: D30V30MAS | ||||||
| #4854: D30V33MASCMA | 4.2 V – 15 V | 3.3 A | 4.2 V – 45 V | 0.9″ × 1.2″ | ||
| #4855: D30V33MAS | ||||||
| 1At 30Â 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. | ||||||
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