Overview
The ADP122AUJZ-2.5-R7 is a low quiescent current, low dropout linear regulator (LDO) produced by Analog Devices Inc. This device is part of the ADP122 series, which is designed for high-performance, space-constrained applications. The ADP122AUJZ-2.5-R7 operates from an input voltage range of 2.3 V to 5.5 V and provides a fixed output voltage of 2.5 V with a maximum output current of 300 mA.
This regulator is optimized for use with small 1.0 μF ceramic capacitors, making it ideal for portable and battery-powered equipment where space and efficiency are critical.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 2.3 | 5.5 | V | ||
| Output Voltage | VOUT | 2.5 | V | |||
| Output Current | IOUT | 0 | 300 | mA | ||
| Dropout Voltage | VDO | IOUT = 300 mA | 85 | mV | ||
| Quiescent Current | IGND | IOUT = 0 mA | 45 | 105 | µA | |
| Shutdown Current | <1 | µA | ||||
| Output Voltage Accuracy | ±1% | |||||
| Operating Temperature Range | TA | -40 | 125 | °C | ||
| Package Type | 5-Lead TSOT |
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.
- High output voltage accuracy: ±1% accuracy.
- Excellent PSRR performance: 60 dB at 100 kHz.
- Excellent load/line transient response.
- Current limit and thermal overload protection.
- Logic controlled enable.
- Compact packages: Available in 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP.
- Internal soft start with 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 ADP122AUJZ-2.5-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the fixed output voltage of the ADP122AUJZ-2.5-R7?
The fixed output voltage is 2.5 V.
- What is the maximum output current of the ADP122AUJZ-2.5-R7?
The maximum output current is 300 mA.
- What is the dropout voltage of the ADP122AUJZ-2.5-R7 at 300 mA load?
The dropout voltage is 85 mV at 300 mA load.
- What is the quiescent current of the ADP122AUJZ-2.5-R7 at no load?
The quiescent current is 45 µA at no load.
- Does the ADP122AUJZ-2.5-R7 have built-in protection features?
Yes, it includes current limit and thermal overload protection.
- What is the operating temperature range of the ADP122AUJZ-2.5-R7?
The operating temperature range is from -40°C to +125°C.
- In what package types is the ADP122AUJZ-2.5-R7 available?
It is available in a 5-lead TSOT package and a 6-lead 2 mm × 2 mm LFCSP package.
- What are some typical applications of the ADP122AUJZ-2.5-R7?
Typical applications include digital camera and audio devices, portable and battery-powered equipment, AMR meters, GPS and location management units, medical instrumentation, and point-of-sale equipment.
- How does the ADP122AUJZ-2.5-R7 handle start-up?
The device has an internal soft start with a constant start-up time of 350 µs.
