The ADP122/ADP123 are low quiescent current, low dropoutlinear regulators. They are designed to operate from an inputvoltage between 2.3 V and 5.5 V and to provide up to 300 mA of output current. The low 85 mV dropout voltage at a 300 mA loadimproves efficiency and allows operation over a wide inputvoltage range.
The low 170 μA of quiescent current at full load makes the ADP122ideal for battery-operated portable equipment.
The ADP122ACPZ-1.8-R7 is capable of 31 fixed output voltages from 1.75 Vto 3.3 V. The ADP123 is the adjustable version of the device andallows the output voltage to be set between 0.8 V and 5.0 V by an external voltage divider.
The ADP122/ADP123 are specifically designed for stable operationwith tiny 1 μF ceramic input and output capacitors to meet therequirements of high performance, space constrained applications.
The ADP122/ADP123 have an internal soft start that gives aconstant start-up time of 350 μs. Short-circuit protection andthermal overload protection circuits prevent damage in adverse conditions. The ADP122/ADP123 are available in a tiny, 5-leadTSOT package and 6-lead LFCSP package for the smallestfootprint solution to meet a variety of portable applications.
Feature
- Input voltage supply range: 2.3 V to 5.5 V
- 300 mA maximum output current
- Fixed and adjustable output voltage versions
- Very low dropout voltage: 85 mV at 300 mA load
- Low quiescent current: 45 μA at no load
- Low shutdown current: <1 μA
- Initial accuracy: ±1% accuracy
- See Data Sheet for additional features
Applications
- Digital camera and audio devices
- Portable and battery-powered equipment
- Automatic meter reading (AMR) meters
- GPS and location management units
- Medical instrumentation
- Point-of-sale equipment
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