The D42V55Fx family of synchronous buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 60 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. The maximum achievable output current of these regulators varies with the input voltage and output voltage and also depends on other factors, including the ambient temperature, air flow, and heat sinking. The graph below shows maximum output currents that these regulators can deliver continuously at room temperature in still air and without additional heat sinking.
The regulators have input reverse voltage protection and over-current 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.
| Regulator |
Output voltage |
Typical max
output current(1) |
Input voltage range(2) |
Size |
| #5570: D42V55F3 |
3.3 V |
6 A |
3.5 V – 60 V |
1″ × 1″ |
| #5571: D42V55F5 |
5 V |
6 A |
5 V – 60 V |
| #5572: D42V55F5.3 |
5.3 V |
6 A |
5.3 V – 60 V |
| #5573: D42V55F6 |
6 V |
5.5 A |
6 V – 60 V |
| #5574: D42V55F7 |
7.5 V |
5 A |
7.5 V – 60 V |
| #5575: D42V55F8 |
8.4 V |
5 A |
8.4 V – 60 V |
| #5576: D42V55F9 |
9 V |
5 A |
9 V – 60 V |
| #5577: D42V55F12 |
12 V |
4.5 A |
12 V – 60 V |
| #5578: D42V55F18 |
18 V |
4 A |
18 V – 60 V |
| #5579: D42V55F24 |
24 V |
4 A |
24 V – 60 V |
|
| Note 1: Typical continuous output current at 36 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information. |
|
| Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information. |
Compare all products in this category
Products in category “D42V55Fx Step-Down Voltage Regulators”
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 3.3 V |
6 A |
3.5 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 5 V |
6 A |
5 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 5.3 V |
6 A |
5.3 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 6 V |
5.5 A |
6 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 7.5 V |
5 A |
7.6 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 8.4 V |
5 A |
8.4 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 9 V |
5 A |
9 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 12 V |
4.5 A |
12 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 18 V |
4 A |
18 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
| Output voltage |
Typical max output current1 |
Input voltage range2 |
| 24 V |
4 A |
24 V – 60 V |
Note 1: Typical continuous output current at 42 V in. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.
