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ADM7155
600 mA, Ultralow Noise, High PSRR, RF Linear Regulator
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Overview
Features and Benefits
- Input voltage range: 2.3 V to 5.5 V
- Output voltage range: 1.2 V to 3.4 V
- Maximum load current: 600 mA
- Low noise
- 0.9 μV rms total integrated noise from 100 Hz to 100 kHz
- 1.6 μV rms total integrated noise from 10 Hz to 100 kHz
- Noise spectral density: 1.5 nV/√Hz from 10 kHz to 1 MHz
- PSRR: >90 dB from 200 Hz to 200 kHz; 57 dB at 1 MHz
- Dropout voltage: 120 mV typical at VOUT = 3.3 V, IOUT = 600 mA
- Initial accuracy: ±0.5%
- Accuracy over line, load, and temperature: −2.0% (minimum), +1.5% (maximum)
- Quiescent current, IGND = 4 mA at no load
- Low shutdown current: 0.2 μA
- Stable with a 10 μF ceramic output capacitor
- 8-lead LFCSP and 8-lead SOIC packages
- Precision enable
- Supported by ADIsimPower tool
Product Details
The ADM7155 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 600 mA of load current. Output voltages from 1.2 V to 3.4 V are possible depending on the model. Using an advanced proprietary architecture, it provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 µF ceramic output capacitor.
The ADM7155 is available in four models that optimize power dissipation and PSRR performance as a function of input and output voltage.
The ADM7155 regulator typical output noise is 0.9 μV rms from 100 Hz to 100 kHz for fixed output voltage options and 1.5 nV/√Hz for noise spectral density from 10 kHz to 1 MHz. The ADM7155 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages, making it not only a very compact solution but also providing excellent thermal performance for applications requiring up to 600 mA of load current in a small, low profile footprint.
Applications
- Regulation to noise sensitive applications: PLLs, VCOs, and PLLs with integrated VCOs
- Communications and infrastructure
- Backhaul and microwave links
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTpowerCAD
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Design tools for the following parts are available in LTpowerCAD:
Design Tools
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Reference Materials
Solutions Bulletins & Brochures (2)
Lowest Noise LDOs Enable Cutting Edge Signal Chain Performance
Technical Articles (1)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Support & Discussions
ADM7155 Discussions
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.