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Step-Down Voltage Regulators
Switching buck converters reduce an input voltage to a lower, regulated voltage much more efficiently than linear regulators. For quick comparison, the following table shows some of the key stats for the regulators in this category:
Newer and preferred products
| Regulator | Output voltage (V) | Max output current | Max input voltage | Typical efficiency | Size | Price |
|---|---|---|---|---|---|---|
| D24V150Fx family | 3.3, 5, 6, 7.5, 9, 12 | 15 A | 40 V | 80% – 95% | 1.25″ × 1.7″ | $59.95 |
| D36V50Fx family | 3.3, 5, 6, 7.5, 9, 12 | 2 – 9 A | 50 V | 80% – 95% | 1″ × 1″ | $24.95 |
| #2851: D24V50F5 | 5 | 5 A | 38 V | 85% – 95% | 0.7″ × 0.8″ | $37.95 |
| D36V28Fx family | 3.3, 5, 6, 7.5, 9, 12 | 2 – 4 A | 50 V | 80% – 95% | 0.7″ × 0.8″ | $22.95 |
| D24V22Fx family | 3.3, 5, 6, 7.5, 9, 12 | 2.2 – 2.6 A | 36 V | 85% – 95% | 0.7″ × 0.7″ | $21.95 |
| D24V10Fx family | 3.3, 5, 6, 9, 12 | 1 A | 36 V | 80% – 95% | 0.5″ × 0.7″ | $9.95 |
| D36V6x family | 3.3, 5, 6, 9, 12, 15 2.5 – 7.5 4 – 25 |
0.6 A | 50 V | 60% – 95% | 0.4″ × 0.5″ 0.4″ × 0.6″ 0.4″ × 0.6″ |
$16.95 to $17.95 |
| D24V5Fx family | 1.8, 2.5, 3.3, 5, 6, 9, 12, 15 | 0.5 A | 36 V | 75% – 95% | 0.4″ × 0.5″ | $5.95 |
Older products (generally not recommended for new designs)
| Regulator | Output voltage (V) | Max output current | Max input voltage | Typical efficiency | Size | Price |
|---|---|---|---|---|---|---|
| #2866: D24V90F5 | 5 | 9 A | 38 V | 80% – 95% | 0.8″ × 1.6″ | $37.95 |
| D24V25Fx family | 3.3, 5, 6, 7.5, 9 | 2.5 A | 38 V | 80% – 95% | 0.7″ × 0.7″ | $24.95 |
| D24V6Fx family | 3.3, 5, 9, 12 | 0.6 A | 42 V | 80% – 95% | 0.4″ × 0.5″ | $6.95 |
| D24V3x family | 3.3, 5, 9, 12 2.5 – 7.5 4 – 25 |
0.3 A | 42 V | 80% – 95% | 0.4″ × 0.5″ | $8.49 |
Compare all products in this category
Subcategories
These powerful synchronous buck voltage regulators take input voltages up to 40 V and efficiently reduce them to a lower fixed output voltage while allowing for an available output current of around 15 A.
These powerful synchronous buck voltage regulators take input voltages up to 50 V and efficiently reduce them to a lower fixed output voltage while allowing for typical continuous input currents between 2 A and 9 A, depending on the combination of input and output voltage.
These compact synchronous buck voltage regulators take input voltages up to 50 V and efficiently reduce them to a lower fixed output voltage while allowing for typical continuous input currents between 2 A and 4 A, depending on the combination of input and output voltage.
These compact synchronous, switching step-down voltage regulators generate lower output voltages from input voltages as high as 36 V. They offer typical efficiencies of 85% to 95% and continuous output currents over 2 A.
These compact synchronous buck voltage regulators take input voltages up to 36 V and reduce them to a lower fixed output voltage while allowing for a maximum output current of 1 A. They offer very high efficiency and very low dropout voltages.
This family of small switching step-down voltage regulators efficiently generates lower output voltages from input voltages as high as 50 V with a maximum current of 600 mA. They have low dropout voltages. Various fixed-voltage and adjustable-output versions are available.
These compact synchronous buck voltage regulators take input voltages up to 36 V and reduce them to a lower fixed output voltage while allowing for a maximum output current of 500 mA. They offer very high efficiency and very low dropout voltages.
These compact synchronous, switching step-down voltage regulators generate lower output voltages from input voltages as high as 38 V. They offer typical efficiencies of 80% to 95% and continuous output currents up to 2.5 A.
This family of small switching step-down voltage regulators efficiently generates lower output voltages from input voltages as high as 42 V with a maximum current of 600 mA.
This family of small switching step-down voltage regulators efficiently generates lower output voltages from input voltages as high as 42 V with a maximum current of 300 mA.
Products in category “Step-Down Voltage Regulators”
| Pololu item #: 2851 | |
| Brand: Pololu | supply outlook |
| Status: Rationed (Active) | |
|
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This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5 V. The board measures only 0.7″ × 0.8″, but it allows a typical continuous output current of up to 5 A. Typical efficiencies of 85% to 95% make this regulator well suited for high-power applications like powering motors or servos. High efficiencies are maintained at light loads by dynamically changing the switching frequency, and an optional shutdown pin enables a low-power state with a current draw of a few hundred microamps.
| Pololu item #: 2866 | |
| Brand: Pololu | supply outlook |
| Status: Rationed (Active) | |
|
|
|
This synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5 V with an available output current of around 9 A. Typical efficiencies of 80% to 95% make this regulator well suited for higher-power applications like powering motors or servos, while high efficiencies are maintained at light loads by dynamically changing the switching frequency, and an optional shutdown pin enables a low-power state with a current draw of a few hundred microamps. The regulator’s output voltage setting can also be lowered by adding an external resistor.
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