Overview
The ADP151AUJZ-3.3-R7 is an ultralow noise, low dropout (LDO) linear regulator produced by Analog Devices Inc. This component is designed to operate from an input voltage range of 2.2 V to 5.5 V and provides up to 200 mA of output current. It is particularly suited for noise-sensitive analog and RF applications due to its innovative circuit topology that achieves ultralow noise performance without the need for a noise bypass capacitor.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | VIN | 2.2 | 5.5 | V | |
| Output Voltage Options | VOUT | 1.1 | 3.3 | V | |
| Maximum Output Current | IOUT | 200 | mA | ||
| Dropout Voltage at 200 mA | VDROPOUT | 135 | mV | ||
| Quiescent Current (IOUT = 0 mA) | IGND | 10 | µA | ||
| Quiescent Current (IOUT = 200 mA) | IGND | 265 | µA | ||
| Shutdown Current | ISHDN | <1 | µA | ||
| Output Noise (10 Hz to 100 kHz) | OUTNOISE | 9 | µV rms | ||
| Thermal Shutdown Threshold | TSSD | 150 | °C |
Key Features
- Ultralow Noise: 9 µV rms, making it ideal for noise-sensitive analog and RF applications.
- No Noise Bypass Capacitor Required: Achieves ultralow noise performance without the need for an additional noise bypass capacitor.
- Stable Operation with Small Capacitors: Stable with 1 µF ceramic input and output capacitors.
- Low Quiescent Current: 10 µA with zero load and 265 µA at 200 mA load.
- Low Dropout Voltage: 135 mV at 200 mA load, improving efficiency and allowing operation over a wide input voltage range.
- Short-Circuit and Thermal Overload Protection: Includes current limiting and thermal shutdown to protect the device.
- Low Shutdown Current: Less than 1 µA, suitable for battery-operated portable equipment.
- Enable/Disable Functionality: The EN pin allows for easy enable and disable of the regulator.
Applications
- Noise-Sensitive Analog and RF Applications: Ideal for applications requiring low noise, such as audio equipment, medical devices, and RF circuits.
- Battery-Operated Portable Equipment: Suitable due to its low quiescent current and low shutdown current.
- High Performance, Space-Constrained Applications: Stable operation with small capacitors makes it suitable for compact designs.
- General Power Supply Needs: Can be used in various applications requiring a stable, low-noise voltage supply.
Q & A
- What is the input voltage range of the ADP151?
The input voltage range of the ADP151 is from 2.2 V to 5.5 V.
- What is the maximum output current of the ADP151?
The maximum output current of the ADP151 is 200 mA.
- What are the output voltage options for the ADP151?
The ADP151 is available in 16 fixed output voltage options, ranging from 1.1 V to 3.3 V.
- Does the ADP151 require a noise bypass capacitor?
No, the ADP151 achieves ultralow noise performance without the need for a noise bypass capacitor.
- What is the quiescent current of the ADP151 at zero load?
The quiescent current of the ADP151 at zero load is 10 µA.
- How does the ADP151 protect against thermal overload?
The ADP151 includes thermal shutdown protection that turns off the output if the junction temperature exceeds 150°C and turns it back on when the temperature drops below 135°C.
- What is the dropout voltage of the ADP151 at 200 mA load?
The dropout voltage of the ADP151 at 200 mA load is 135 mV.
- Can the ADP151 be used in battery-operated devices?
- How do you enable and disable the ADP151 regulator?
- What type of capacitors are recommended for use with the ADP151?
