ADM7171:  6.5 V, 1 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

Product Details

Product Status:Recommended for New Designs

The ADM7171 is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 1 A of output current. This high output current LDO is ideal for regulation of high performance analog and mixed signal circuits operating from 6 V down to 1.2 V rails. Using an advanced proprietary architecture, the device provides high power supply rejection and low noise, and achieves excellent line and load transient response with just a small 4.7 μF ceramic output capacitor. Load transient response is typically 1.5 μs for a 1 mA to 500 mA load step.

The ADM7171 is available in 17 fixed output voltage options. The following voltages are available from stock: 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V. Additional voltages that are available by special order are: 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.7 V, 2.75 V, 2.8 V, 2.85 V, 3.8 V, and 4.6 V. An adjustable version is also available that allows output voltages that range from 1.2 V to VIN − VDO with an external feedback divider.

Inrush current can be controlled by adjusting the start-up time via the soft start pin. The typical start-up time with a 1 nF soft start capacitor is 1.0 ms.

The ADM7171 regulator output noise is 5 μV rms independent of the output voltage. The ADM7171 is available in an 8-lead, 3 mm × 3 mm LFCSP, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 1 A of output current in a small, low profile footprint.

APPLICATIONS

  • Regulation to noise sensitive applications: ADC and DAC
    circuits, precision amplifiers, PLLs/VCOs, and clocking ICs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation

FEATURES and BENEFITS

  • Input voltage range: 2.3 V to 6.5 V
  • Maximum load current: 1 A
  • Low noise: 5 μV rms independent of output voltage at 100 Hz to 100 kHz
  • Fast transient response: 1.5 μs for 1 mA to 500 mA load step
  • 60 dB PSRR at 100 kHz
  • Low dropout voltage: 42 mV at 500 mA load, VOUT = 3 V
  • Initial accuracy: −0.5% (minimum), +1% (maximum)
  • Accuracy over line, load, and temperature: ±1.5%
  • Quiescent current, IGND = 0.7 mA with no load
  • Low shutdown current: 0.25 μA at VIN = 5 V
  • Stable with small 4.7 μF ceramic output capacitor
  • See data sheet for additional features

Functional Block Diagram for ADM7171

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI Linear Regulator Design Tool and Parametric Search  (zip)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADM7171 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM7171ACPZ-1.3-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-1.8-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-2.5-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-3.0-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-3.3-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-4.2-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-5.0-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
ADM7171ACPZ-R2 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 250 $1.43 $1.43 Y  Material Info Notify Me Purchase
ADM7171ACPZ-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Ind Reel, 1500 - $1.19 Y  Material Info Notify Me Purchase Sample
Price Table Help

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.

ADM7170/ADM7171/ADM7172 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM7170CP-EVALZ Status: Production Evaluation Board $49.00 Yes -
ADM7171CP-EVALZ Status: Production Evaluation Board $49.00 Yes -
ADM7172CP-EVALZ Status: Production Evaluation Board $49.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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