Linear Technology Corporation announces the LTC3025, a 300mA Very Low Dropout Regulator (VLDO) with input voltage capability down to 0.9V. It has a very low dropout voltage of only 45mV while delivering up to 300mA of output current. The low VIN capability is important, as many emerging handheld applications are using a 1.5V main bus rail, and require output voltages from 1.25V to 0.5V to drive low voltage microprocessor and microcontroller cores. The LTC3025 can also be used for 3.3V/5V down to VOUT ≤1.20V, since it has a 0.4V reference. In addition, the LTC3025 offers micropower operation with only 54uA of quiescent current, and less than 1uA in shutdown, maximizing run time in handheld applications.

The LTC3025 regulator optimizes stability and transient response with low ESR ceramic output capacitors as small as 1uF. Other LTC3025 features include ± 2% voltage accuracy over temperature and supply load, fast transient recovery, current limiting and thermal overload shutdown. Its shutdown disconnect feature disconnects both VIN and VBIAS from the output in shutdown mode. The LTC3025 regulator is available in a low profile 6-lead DFN (2mm x 2mm x 0.75mm) package with an exposed pad, offering a very compact and thermally efficient solution.

The LTC3025 is packaged in a 2mm x 2mm QFN-6 and is available from stock. Pricing starts at $1.65 each for 1,000-piece quantities.

Summary of Features: LTC3025
Wide Input Voltage Range: 0.9V to 5.5V
Stable with Ceramic Capacitors
Very Low Dropout: 45mV at 300mA
Adjustable Output Range: 0.4V to 3.6V
± 2% Voltage Accuracy over Temperature, Supply Load
BIAS Voltage Range: 2.5V to 5.5V
Fast Transient Recovery
Shutdown Disconnects Load from VIN and VBIAS
Available in 6-Lead (2mm x 2mm) DFN Package