LDOs for space-constrained portable applications
Analog Devices
ADP124 and ADP125 LDOs
Analog Devices has launched two low-quiescent-current LDOs that deliver good supply-rejection performance to help battery-operated portable equipment run longer and more efficiently.
The ADP124 and ADP125 LDOs are said to have excellent power-supply-rejection ratio (PSRR) performance of 60dB at 100kHz and achieve low noise of 35uVrms (micro-volts per root mean squared) at 1.8V output.
Operating from an input voltage between 2.3V and 5.5V and providing up to 500mA of output current down to a 0.8V, the LDOs also feature a low quiescent current of 210uA and a 130mV dropout voltage at a 500mA load, which further improves portable equipment operating efficiency over a wide input voltage range.
The ADP124 offers 31 fixed-output voltage options from 1.75V to 3.3V.
The ADP125 LDO provides an adjustable output voltage between 0.8V and 5.0V using an external voltage divider.
The ADP124 and ADP125 are specifically designed for stable operation with tiny 1uF ceramic input and output capacitors to meet the requirements of high-performance, space-constrained applications.
The LDOs are available in a compact 2 x 2 x 0.55mm LFCSP package or an eight-lead exposed paddle MSOP package.
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