# 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″$27.95 to $27.95 #2851: D24V50F5 5 5 A 38 V 85% – 95% 0.7″ × 0.8″$29.95
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″$27.95 to $27.95 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″
$9.95 to$10.95
D24V5Fx family 1.8, 2.5, 3.3, 5, 6, 9, 12, 15 0.5 A 36 V 75% – 95% 0.4″ × 0.5″ $6.95 ### 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″$29.95
D24V25Fx family 3.3, 5, 6, 7.5, 9 2.5 A 38 V 80% – 95% 0.7″ × 0.7″ $24.95 to$24.95
D24V6Fx family 3.3, 5, 9, 12 0.6 A 42 V 80% – 95% 0.4″ × 0.5″ $9.49 D24V3x family 3.3, 5, 9, 12 2.5 – 7.5 4 – 25 0.3 A 42 V 80% – 95% 0.4″ × 0.5″$14.95 to \$7.95

## D24V150Fx Step-Down Voltage Regulators

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.

## D36V50Fx Step-Down Voltage Regulators

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.

## D36V28Fx Step-Down Voltage Regulators

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.

## D24V22Fx Step-Down Voltage Regulators

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.

## D24V10Fx Step-Down Voltage Regulators

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.

## D36V6x Step-Down Voltage Regulators

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.

## D24V5Fx Step-Down Voltage Regulators

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.

## D24V25Fx Step-Down Voltage Regulators

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.

## D24V6Fx Step-Down Voltage Regulators

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.

## D24V3x Step-Down Voltage Regulators

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 Status: Rationed (Active)
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

## Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5

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 Status: Rationed (Active)
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

## Pololu 5V, 9A Step-Down Voltage Regulator D24V90F5

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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