30V buck switching regulator achieves 95% efficiency
Paul Rako, Technical Editor -- EDN, July 20, 2011
Microchip Technology’s new 30V-input MCP16301 buck switching regulator features a 600-mA output and a 4 to 30V input-voltage range. The chip integrates a high-side switch and can output a voltage of 2 to 15V. It can provide as much as 95% efficiency. High-speed peak-current-mode control allows fast responses to sudden input-voltage and load transients that power applications frequently encounter. Integrated control-loop and slope compensation make it easy to reliably stabilize the converter-control system.
The IC targets use in applications in the industrial, telecommunications, consumer, and automotive markets, such as set-top boxes, LED lighting, HVAC (heating/ventilation/air-conditioning) systems and power meters. It uses less power and dissipates less heat than a low-dropout regulator does.
A D2PAK footprint demo board with 300-mA outputs is available for $14.99, and a 600-mA demo board sells for $19.99. The MCP16301 is available in a six-pin SOT-23 package and sells for 83 cents (10,000).
Microchip Technology
Talkback
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Good catch, guys, I called Microchip and they sent a corrected image in 20 minutes, that's a record. So now the flyback diode goes to common, not the feedback pin. The Microchip folks thank you for catching the error.
Paul Rako - 2011-28-7 09:00:48 PDT -
Heh, good catch.
The freewheel diode is connected to the feedback pin.
The result depends on the parasitic circuit elements, but it will likely end up with full supply voltage applied to the load.
Donald Becker - 2011-25-7 14:22:36 PDT -
not like that it doesn't...note the diode connection
M - 2011-21-7 18:39:22 PDT
