Product category:
Power Supply ICs and Controllers
News Release from: Microchip Technology | Subject: MCP1256, MCP1257, MCP1258 and MCP1259
Edited by the Electronicstalk Editorial
Team on 17 March 2006
Pumps provide efficient backlighting
power
A new family of positively regulated charge pump DC/DC convertors are claimed to be among the most efficient in the industry.
A new family of positively regulated charge pump DC/DC convertors are claimed to be among the most efficient in the industry Microchip's first fractional charge pumps, the MCP1256, MCP1257, MCP1258 and MCP1259 automatically switch between 1.5x and 2x boost operation to increase efficiency
This article was originally published on Electronicstalk on 10 Apr 2001 at 8.00am (UK)
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At light output loads, the MCP1256 and MCP1257 can be placed in a "sleep" mode, where quiescent current is lowered but regulated output voltage stays the same.
Additionally, the MCP1258 and MCP1259 devices provide a bypass feature that connects the input voltage to the output, which provides a bias voltage for the system with virtually no power drain from the charge pump itself.
All of the MCP125X devices have a low-noise output ripple of less than 10mV peak-peak at load currents up to100mA, resulting in less system interference and better overall performance.
Other features include soft start, short-circuit protection and thermal protection.
In addition, they operate over an extended temperature range (-40 to +125C).
The MCP125X charge pump DC/DC convertors are ideal for battery-powered consumer electronics devices that require low power and use white light-emitting-diode (LED) backlights for liquid-crystal displays (LCDs) and are also well-suited to noise-sensitive industrial applications.
The MCP1256, MCP1257, MCP1258 and MCP1259 devices are available in 10-pin MSOP or 3 x 3mm DFN packages.
To help engineers evaluate and demonstrate the MCP125X charge pump DC/DC convertors, Microchip offers the MCP125X charge pump DC/DC convertor evaluation board for $35.
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