Overview
The ADP125ARHZ-R7, produced by Analog Devices Inc., is a low quiescent current, low dropout linear regulator. This device is part of the ADP125 series, which includes adjustable output voltage versions. The ADP125 is designed to operate from an input voltage range of 2.3 V to 5.5 V and can provide up to 500 mA of output current. It is particularly suited for battery-operated portable equipment due to its low quiescent current and high efficiency.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | VIN | 2.3 | 5.5 | V | |
| Output Voltage Range (Adjustable) | VOUT | 0.8 | 5.0 | V | |
| Maximum Output Current | IOUT | 500 | mA | ||
| Dropout Voltage | VDO | 130 | mV | ||
| Quiescent Current (IOUT = 0 mA) | IGND | 45 | 105 | µA | |
| Quiescent Current (IOUT = 500 mA) | IGND | 210 | 280 | µA | |
| Power Supply Rejection Ratio (PSRR) at 100 kHz | PSRR | 60 | dB | ||
| Shutdown Current | ISD | <1 | µA | ||
| Package Type | 8-lead exposed paddle MSOP and LFCSP |
Key Features
- Low quiescent current: 45 µA (IOUT = 0 mA) and 210 µA (IOUT = 500 mA)
- Low dropout voltage: 130 mV at 500 mA load
- Adjustable output voltage range from 0.8 V to 5.0 V using an external voltage divider
- High PSRR: 60 dB at 100 kHz
- Excellent load/line transient response
- Current limit and thermal overload protection
- Logic controlled enable
- Compact 8-lead exposed paddle MSOP and LFCSP packages
- Internal soft start with a constant start-up time of 350 µs
- Stable operation with small 1.0 µF ceramic input and output capacitors
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 load power
Q & A
- What is the input voltage range of the ADP125ARHZ-R7? The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum output current of the ADP125ARHZ-R7? The maximum output current is 500 mA.
- How is the output voltage adjusted in the ADP125ARHZ-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 ADP125ARHZ-R7 at no load? The quiescent current is 45 µA at IOUT = 0 mA.
- What is the dropout voltage of the ADP125ARHZ-R7 at a 500 mA load? The dropout voltage is 130 mV at a 500 mA load.
- What is the power supply rejection ratio (PSRR) of the ADP125ARHZ-R7 at 100 kHz? The PSRR is 60 dB at 100 kHz.
- What types of packages are available for the ADP125ARHZ-R7? The device is available in 8-lead exposed paddle MSOP and LFCSP packages.
- Does the ADP125ARHZ-R7 have built-in protection features? Yes, it includes current limit and thermal overload protection.
- How does the ADP125ARHZ-R7 handle start-up? It has an internal soft start with a constant start-up time of 350 µs.
- What kind of capacitors are recommended for stable operation of the ADP125ARHZ-R7? Small 1.0 µF ceramic input and output capacitors are recommended.
