This is the best “7805” you can get. Pin-compatible to the monolithic 7805 LDO regulator, delivers 5V and 1A max. current with an input voltage of 6.5 to 40V DC and a conversion efficiency of up to 90%. No other “7805” LDO can handle input voltage up to 40V DC, and does not even need a heat sink under full load.
Quiescent current: 1.5mA
PCB size: ca. 10 x 18mm
Why should you replace your 7805 LDO voltage regulators with this switching voltage regulator:
Your input voltage is 12V, and the 5V circuit you want to power up takes 500mA.
With the standard LDO 7805 monolithic TO-220 regulator, the heat dissipation is exactly (12V-5V) * 0.5A = 3.5W, 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 5V circuit you want to power up takes 750mA.
With the standard LDO 7805 monolithic TO-220 regulator, the heat dissipation is exactly (24V-5V) * 0.75A = 14.25W, 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 L7805, LM7805 and other TO-220 7805 LDOs.