Microchip Technology Inc. has developed the MCP1804 low dropout regulator that delivers up to 150mA of output current and support output voltages from 1.8V-18V. It offers stable input and output, with 0.1µfarads of input and output capacitance, and operates on a typical quiescent current of 50µA. A shutdown function allows the output to be disabled, dropping the quiescent current to only 0.01µA. The LDO is available in a space-saving SOT-23, and thermally capable SOT-89 and SOT-223 packages, and is suited for applications in the industrial and consumer markets, such as security systems, wireless communication systems, cordless phones and home appliances.
Designers must often drop the voltage from existing high-voltage rails, such as 12V and 24V rails, to power subsystem circuitry. The MCP1804's 28V input and wide output voltage range provide designers with a flexible means of doing this. Additionally, because the LDOs only require 0.1µfarads of input and output capacitance, smaller and lower-cost ceramic capacitors can be used. The small and thermally capable package options make the LDOs suitable for space-constrained and high-power designs.
"We are pleased to expand our high-voltage LDO portfolio with the MCP1804 family," said Bryan Liddiard, VP of marketing with Microchip's analog and interface products division. "The flexibility of these 28V, 150mA devices reinforces our goal of providing the complete product solutions that our customers have come to expect."
The MCP1804 LDOs are available in 3-pin SOT-89 and SOT-223 packages, as well as a 5-pin SOT-89 package, for $0.50 each in 10,000-unit quantities. They are also available in a 5-pin SOT-23 package for $0.48 each in 10,000-unit quantities. Samples are available today.
For application notes on LDOs click here.
Keywords:
LDO
regulator
power management
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