Reduces power consumption and saves board space in battery-powered applications

By Alex Pluemer, contributing writer

Microchip
Technology Inc.
recently launched a new linear low-dropout (LDO)
regulator that can extend battery life in mobile and portable electronic
devices by as much as four times longer than conventional ultra-low-quiescent
(lQ) LDOs. The MCP1811 LDO’s ultra-low lQ will allow consumers to
recharge and replace batteries less frequently, a crucial factor in the
marketability of battery-powered electronic devices.

By featuring an
ultra-low lQ of 250 nA (compared with approximately 1 µA for conventional
LDOs), the new LDO reduces standby and/or shutdown current, thereby minimizing
power consumption in battery-powered applications. Power dissipation in standby
mode is a critical factor for remote, battery-operated sensor nodes due to the
stringent demands that they make on battery life and the difficulty in
replacing batteries.

The MCP1811 is
available in package sizes as small as 1 × 1 mm, potentially saving developers
valuable board space that can be used for a larger battery.

The MCP1811 also
provides faster load line and transient response compared with other ultra-low-
lQ LDOS, allowing devices like monitors or sensors to wake up more
quickly from sleep or standby modes. Faster transient response times can help designers
avoid undervoltage and overvoltage lockout measures found in sensitive applications
in which transient spikes can lead to catastrophic results, said ST.

Samples are
available. Prices start at $0.28 per 10,000 units in a 1 × 1-mm DFN package.
Parts can be purchased via Microchip’s purchasing
portal
.