Overview
The D36V50Fx family of buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 50 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. These regulators can typically support continuous output currents between 2 A and 9 A, depending on the input voltage and output voltage (see the Maximum continuous output current section below). In general, the available output current is a little higher for the lower-voltage versions than it is for the higher-voltage versions, and it decreases as the input voltage increases.
This family includes six versions with fixed output voltages ranging from 3.3 V to 12 V:
- D36V50F3: Fixed 3.3V output
- D36V50F5: Fixed 5V output
- D36V50F6: Fixed 6V output
- D36V50F7: Fixed 7.5V output
- D36V50F9: Fixed 9V output
- D36V50F12: Fixed 12V output
The regulators have input reverse voltage protection up to 40 V, output undervoltage and overvoltage protection, over-current protection, and short-circuit 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.
If you do not need quite as much current, consider the very similar D36V28Fx family of step-down voltage regulators, which can deliver up to 4 A in a wide range of output voltages.
We manufacture these boards in-house at our Las Vegas facility, which gives us the flexibility to make these regulators with customized components to better meet the needs of your project. For example, if you have an application where the input voltage will always be below 20 V and efficiency is very important, we can make these regulators a bit more efficient at high loads by replacing the 40V reverse voltage protection MOSFET with a 20V one. We can also customize the output voltage. If you are interested in customization, please contact us.
Features
Connections
This regulator has six connections, some of which are duplicated on multiple pins: power good (PG), enable (EN), input voltage (VIN), input voltage after reverse protection (VRP), output voltage (VOUT), and ground (GND).
Dimensions
- Size: 1? × 1? × 0.375?1
- Weight: 7.0 g1
General specifications
- Minimum operating voltage: 4.5 V
- Maximum operating voltage: 50 V
- Continuous output current: 6.5 A2
- Output voltage: 3.3 V
- Reverse voltage protection?: Y3
- Maximum quiescent current: 4 mA4
- Output type: fixed 3.3V
Identifying markings
- PCB dev codes: reg24d
- Other PCB markings: 0J12574, blank white box
Notes:
- 1. Without included optional headers.
- 2. 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 graph under the description tab for more information.
- 3. To -40 V. Connecting supplies over 40 V in reverse can damage the device.
- 4. While enabled with no load. Can be reduced to under 1 mA using the enable pin.
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