Battery boost from low current LDO regulator

Battery boost from low current LDO regulator

New Products |
By Nick Flaherty

The quiescent current (Iq) of 250 nA for the MCP1811/12 LDO devices reduces quiescent current to save battery lifeand allowing equipment to run for months or even years on a single battery.

The device is aimed at IoT and battery-operated applications such as wearables, remotes and hearing aids by minimising standby or shutdown current. It is available in package options as small as 1 x 1 mm for compact portable electronic designs and depending on the application and number of LDOs, designers can take advantage of the extra board space with a larger battery to further increase battery life. It can also shut down for a 5 nA (typical) supply current draw.

An additional benefit is faster load line and transient response to accelerate wake-up speed in devices such as monitors or sensors that require immediate attention. Faster transient response can help designers to avoid undervoltage and overvoltage lockout measures used in sensitive applications where transient spikes can result it catastrophic results. The typical dropout voltage is 400 mV  with a ±20 mV to ±50 mV load regulation. 

The MCP1811/12 family comes in nine standard fixed output-voltage versions: 1V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 4.0V and 150/300 mA output current. The LDOs are stable with ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 1 μF (2.2 μF for MCP1812) of output capacitance is needed to assure the stability of the system with a low noise output.The MCP1811 is available today for sampling and in volume production in packages in 3 and 5 lead SOT-23, 3 and 5 lead SC70 and 4 lead 1x1mm UDFN packages.

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