DC-DC Switching Regulator 3.3V 1A – TO-220 pinout – 78xx Replacement
|Closed for Xmas Holidays 12/12 – 01/06.
Except on 12/26 for Boxing Day Special.
No backorders accepted until 01/06/2024.
|Discount Type||Quantity||Volume Price|
|Quantity||3 - 9||10% CAD 3.20|
|Quantity||10 - 24||12.5% CAD 3.11|
|Quantity||25 +||15% CAD 3.02|
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This 7805 pin-compatible step-down switching voltage regulator delivers 3.3V and 1A max. current with an input voltage of 5 to 40V DC.
Quiescent current: 1.5mA
PCB size: ca. 10 x 18mm
Why should you replace your 3.3V LDO voltage regulators with this switching voltage regulator:
Your input voltage is 12V, and the 3.3V circuit you want to power up takes 500mA.
With the standard monolithic LDO regulator, the heat dissipation is exactly (12V-3.3V) * 0.5A = 4.35W, which already requires a heat sink.
With the new switching regulator, the heat dissipation is less than 0.5W.
Your input voltage is 24V, and the 3.3V circuit you want to power up takes 750mA.
With the standard monolithic LDO regulator, the heat dissipation is (24V-3.3V) * 0.75A = 15.5W, which already requires a big heat sink, and maybe a cooling fan. With the new switching regulator, the heat dissipation is just about 0.7W.
The step-down regulator comes with over-temperature shut off, under-voltage and short circuit protection.
The switching frequency is with 550kHz pretty high, what makes the small size of the device possible.
This regulator is pin-compatible with L78xx, LM78xx and other TO-220 78xx LDOs.
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