Overview
The ADP123AUJZ-R7, produced by Analog Devices Inc., is a low quiescent current, low dropout linear regulator. This device is part of the ADP123 series and is designed to operate from an input voltage range of 2.3 V to 5.5 V, providing up to 300 mA of output current. The ADP123AUJZ-R7 is the adjustable version of the ADP122/ADP123 family, allowing the output voltage to be set between 0.8 V and 5.0 V using an external voltage divider. This regulator is optimized for use in battery-operated and portable equipment due to its low quiescent current and high efficiency.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 2.3 | 5.5 | V | ||
| Operating Supply Current | IGND | IOUT = 0 µA | 45 | 105 | µA | |
| Output Voltage Range (Adjustable) | VOUT | 0.8 | 5.0 | V | ||
| Dropout Voltage | VDO | IOUT = 300 mA | 85 | mV | ||
| Quiescent Current | IQ | IOUT = 0 µA | 45 | µA | ||
| Shutdown Current | ISD | <1 | µA | |||
| PSRR at 100 kHz | PSRR | 60 | dB | |||
| Current Limit Threshold | ILIM | 300 | mA | |||
| Start-up Time | TSTART | 350 | µs |
Key Features
- Low quiescent current: 45 µA at no load, making it ideal for battery-operated devices.
- Low dropout voltage: 85 mV at 300 mA load, improving efficiency and allowing operation over a wide input voltage range.
- Adjustable output voltage: Can be set between 0.8 V and 5.0 V using an external voltage divider.
- High PSRR: 60 dB at 100 kHz, ensuring excellent noise rejection.
- Current limit and thermal overload protection: Prevents damage in adverse conditions.
- Logic controlled enable: Allows for easy control of the regulator.
- Compact packages: Available in 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP packages for small footprint solutions.
- Internal soft start: Provides a constant start-up time of 350 µs.
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
Q & A
- What is the input voltage range of the ADP123AUJZ-R7?
The input voltage range is between 2.3 V and 5.5 V.
- What is the maximum output current of the ADP123AUJZ-R7?
The maximum output current is 300 mA.
- How is the output voltage adjusted in the ADP123AUJZ-R7?
The output voltage can be adjusted between 0.8 V and 5.0 V using an external voltage divider.
- What is the quiescent current of the ADP123AUJZ-R7 at no load?
The quiescent current at no load is 45 µA.
- What is the dropout voltage of the ADP123AUJZ-R7 at a 300 mA load?
The dropout voltage at a 300 mA load is 85 mV.
- Does the ADP123AUJZ-R7 have built-in protection features?
Yes, it includes current limit and thermal overload protection.
- What is the PSRR of the ADP123AUJZ-R7 at 100 kHz?
The PSRR at 100 kHz is 60 dB.
- What are the available package options for the ADP123AUJZ-R7?
The device is available in 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP packages.
- What is the start-up time of the ADP123AUJZ-R7?
The start-up time is 350 µs.
- In which applications is the ADP123AUJZ-R7 commonly used?
It is commonly used in digital cameras, portable and battery-powered equipment, AMR meters, GPS units, medical instrumentation, and point-of-sale equipment.
