The ADP170/ADP171/ADP172 are low voltage input, low quiescentcurrent, low-dropout (LDO) linear regulators that operate from1.6 V to 3.6 V and provide up to 300 mA of output current. Thelow 55 mV dropout voltage at 300 mA load improves efficiencyand allows operation over a wide input voltage range. The low23 μA of quiescent current at no load makes theADP170/ADP171/ADP172 ideal for battery-operated portable equipment.
TheADP170 is capable of 31 fixed-output voltage options, ranging from 0.8 V to 3.0 V. ADP171AUJZ-R7 is an adjustable version, which allows output voltages that range from 0.8 V to3.0 V via an external divider. The ADP170/ADP171AUJZ-R7 areoptimized for stable operation with small 1 μF ceramic outputcapacitors. Ideal for powering digital processors, the ADP170/ADP171AUJZ-R7 exhibit good transient performance andoccupy minimal board space. Compared with commodity typesof LDOs, the ADP170/ADP171AUJZ-R7 provide 20 dB to 40 dB betterpower supply rejection ratio (PSRR) at 100 kHz, making the ADP170/ADP171AUJZ-R7 an ideal power source for analog-to-digitalconverter (ADC) mixed-signal processor systems and allowinguse of smaller size bypass capacitors. In addition, low outputnoise performance without the need for an additional bypasscapacitor further reduces printed circuit board (PCB)component count.
Short-circuit protection and thermal overload protectioncircuits prevent damage in adverse conditions. TheADP170/ADP171AUJZ-R7 are available in tiny 5-lead TSOT for thesmallest footprint solution to meet a variety of portable powerapplications.
ApplicationsFeature
- Maximum output current: 300 mA
- Input voltage range: 1.6 V to 3.6 V
- Low quiescent current
- IGND = 23 μA with 0 mA load
- IGND = 170 μA with 300 mA load
- Low shutdown current: <1 μA
- Low dropout voltage: 66 mV at 300 mA load
- Output voltage accuracy: ±1%
- Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V
- Adjustable-output voltage options0.8 V to 3.0 V (ADP171)
- Accuracy over line, load, and temperature: ±3%
- Stable with small 1 μF ceramic output capacitor
- PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz
- See data sheet for additional features
Applications
- Mobile phones
- Digital camera and audio devices
- Portable and battery-powered equipment
- DSP/FPGA/microprocessor supplies
- Post dc-dc regulation
(Picture: Pinout)
