# 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 products are at the top of the table and are generally preferred:

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″ $39.95 #2851: D24V50F5 5 5 A 38 V 85% – 95% 0.7″ × 0.8″$14.95
D24V22Fx family 3.3, 5, 6, 7.5, 9, 12 2.2 – 2.6 A 36 V 85% – 95% 0.7″ × 0.7″ $8.95 to$9.95
#2866: D24V90F5 5 9 A 38 V 80% – 95% 0.8″ × 1.6″ $27.95 #2865: D24V60F5 5 6 A 38 V 80% – 95% 0.8″ × 1.6″$19.95
D24V10Fx family 3.3, 5, 6, 9, 12 1 A 36 V 80% – 95% 0.5″ × 0.7″ $7.49 D24V5Fx family 1.8, 2.5, 3.3, 5, 6, 9, 12, 15 0.5 A 36 V 75% – 95% 0.4″ × 0.5″$4.95
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″
$4.95 to$6.95

### Older products (generally not recommended for new design)

Regulator Output voltage (V) Max output current Max input voltage Typical efficiency Size Price
#2849: D24V25F3 3.3 V 2.5 A 38 V 80% – 95% 0.7″ × 0.7″ $10.95 #2850: D24V25F5 5 V 2.5 A 38 V 85% – 95% 0.7″ × 0.7″$10.95
#2852: D24V25F6 6 V 2.5 A 38 V 85% – 95% 0.7″ × 0.7″ $11.95 #2853: D24V25F7 7.5 V 2.5 A 38 V 85% – 95% 0.7″ × 0.7″$11.95
#2854: D24V25F9 9 V 2.5 A 38 V 85% – 95% 0.7″ × 0.7″ $11.95 #2097: D24V3F3 3.3 V 0.3 A 42 V 80% – 90% 0.4″ × 0.5″$3.95
#2098: D24V3F5 5 V 0.3 A 42 V 80% – 90% 0.4″ × 0.5″ $3.95 #2099: D24V3F9 9 V 0.3 A 42 V 85% – 95% 0.4″ × 0.5″$3.95
#2100: D24V3F12 12 V 0.3 A 42 V 85% – 95% 0.4″ × 0.5″ $3.95 #2106: D24V6F3 3.3 V 0.6 A 42 V 80% – 90% 0.4″ × 0.5″$5.95
#2107: D24V6F5 5 V 0.6 A 42 V 80% – 90% 0.4″ × 0.5″ $5.95 #2108: D24V6F9 9 V 0.6 A 42 V 85% – 95% 0.4″ × 0.5″$5.95
#2109: D24V6F12 12 V 0.6 A 42 V 90% – 95% 0.4″ × 0.5″ $5.95 #2103: D24V6ALV 2.5 V – 7.5 V 0.6 A 42 V 70% – 85% 0.4″ × 0.6″$9.95
#2101: D24V3ALV 2.5 V – 7.5 V 0.3 A 42 V 70% – 85% 0.4″ × 0.6″ $7.95 #2104: D24V6AHV 4 V – 25 V 0.6 A 42 V 75% – 90% 0.4″ × 0.6″$9.95
#2102: D24V3AHV 4 V – 25 V 0.3 A 42 V 75% – 90% 0.4″ × 0.6″ \$7.95

## Pololu 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.

## 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.

## 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.

## Pololu 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.

## Pololu 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.

## Products in category “Step-Down Voltage Regulators”

 Pololu item #: 2851 Brand: Pololu Status: Active and Preferred Free add-on shipping in USA
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## 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: Active and Preferred Free add-on shipping in USA
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## 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.

 Pololu item #: 2865 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 5V, 6A Step-Down Voltage Regulator D24V60F5

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 6 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.

 Pololu item #: 2849 Brand: Pololu Status: Active
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## Pololu 3.3V, 2.5A Step-Down Voltage Regulator D24V25F3

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 3.3 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 80% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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 #: 2850 Brand: Pololu Status: Active
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## Pololu 5V, 2.5A Step-Down Voltage Regulator D24V25F5

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″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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 #: 2852 Brand: Pololu Status: Active
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## Pololu 6V, 2.5A Step-Down Voltage Regulator D24V25F6

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 6 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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 #: 2853 Brand: Pololu Status: Active
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## Pololu 7.5V, 2.5A Step-Down Voltage Regulator D24V25F7

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 7.5 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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 #: 2854 Brand: Pololu Status: Active
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## Pololu 9V, 2.5A Step-Down Voltage Regulator D24V25F9

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 9 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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 #: 2097 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 3.3V, 300mA Step-Down Voltage Regulator D24V3F3

The compact (0.4″ × 0.5″) D24V3F3 switching step-down (or buck) voltage regulator takes an input voltage between 4.3 V and 42 V and efficiently reduces it to 3.3 V while allowing for a maximum output current of 300 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2098 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 5V, 300mA Step-Down Voltage Regulator D24V3F5

The compact (0.4″ × 0.5″) D24V3F5 switching step-down (or buck) voltage regulator takes an input voltage between 7 V and 42 V and efficiently reduces it to 5 V while allowing for a maximum output current of 300 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2099 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 9V, 300mA Step-Down Voltage Regulator D24V3F9

The compact (0.4″ × 0.5″) D24V3F9 switching step-down (or buck) voltage regulator takes an input voltage between 11 V and 42 V and efficiently reduces it to 9 V while allowing for a maximum output current of 300 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2100 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 12V, 300mA Step-Down Voltage Regulator D24V3F12

The compact (0.4″ × 0.5″) D24V3F12 switching step-down (or buck) voltage regulator takes an input voltage between 14.5 V and 42 V and efficiently reduces it to 12 V while allowing for a maximum output current of 300 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2106 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 3.3V, 600mA Step-Down Voltage Regulator D24V6F3

The compact (0.4″ × 0.5″) D24V6F3 switching step-down (or buck) voltage regulator takes an input voltage between 4.8 V and 42 V and efficiently reduces it to 3.3 V while allowing for a maximum output current of 600 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2107 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 5V, 600mA Step-Down Voltage Regulator D24V6F5

The compact (0.4″ × 0.5″) D24V6F5 switching step-down (or buck) voltage regulator takes an input voltage between 7 V and 42 V and efficiently reduces it to 5 V while allowing for a maximum output current of 600 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2108 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 9V, 600mA Step-Down Voltage Regulator D24V6F9

The compact (0.4″ × 0.5″) D24V6F9 switching step-down (or buck) voltage regulator takes an input voltage between 11.5 V and 42 V and efficiently reduces it to 9 V while allowing for a maximum output current of 600 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2109 Brand: Pololu Status: Active Free add-on shipping in USA
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## Pololu 12V, 600mA Step-Down Voltage Regulator D24V6F12

The compact (0.4″ × 0.5″) D24V6F12 switching step-down (or buck) voltage regulator takes an input voltage between 15 V and 42 V and efficiently reduces it to 12 V while allowing for a maximum output current of 600 mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2103 Brand: Pololu Status: Not Recommended for New Design
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## Pololu Step-Down Voltage Regulator D24V6ALV

The compact (0.4″ × 0.6″) D24V6ALV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 V and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 2.5 V to 7.5 V and a maximum output current of 600mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2101 Brand: Pololu Status: Not Recommended for New Design
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## Pololu Step-Down Voltage Regulator D24V3ALV

The compact (0.4″ × 0.6″) D24V3ALV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 V and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 2.5 V to 7.5 V and a maximum output current of 300mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2104 Brand: Pololu Status: Not Recommended for New Design
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## Pololu Step-Down Voltage Regulator D24V6AHV

The compact (0.4″ × 0.6″) D24V6AHV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 V and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 4 V to 25 V and a maximum output current of 600mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

 Pololu item #: 2102 Brand: Pololu Status: Not Recommended for New Design
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## Pololu Step-Down Voltage Regulator D24V3AHV

The compact (0.4″ × 0.6″) D24V3AHV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 V and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 4 V to 25 V and a maximum output current of 300mA. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

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