ADP7105:  20 V, 500 mA, Low Noise LDO Regulator with Soft Start

Product Details

Product Status:Recommended for New Designs

The ADP7105 is a CMOS, low dropout (LDO) linear regulator that operates from 3.3 V to 20 V and provides up to 500 mA of output current. This high input voltage LDO is ideal for regula-tion of high performance analog and mixed-signal circuits operating from 1.22 V to 19 V rails. Using an advanced proprietary architecture, the ADP7105 provides high power supply rejection and low noise, and achieves excellent line and load transient response with only a small 1 μF ceramic output capacitor.

The ADP7105 is available in three fixed output voltage options and an adjustable version that allows output voltages ranging from 1.22 V to 19 V via an external feedback divider. The ADP7105 allows an external soft start capacitor to be connected to program the startup.

Note that throughout this data sheet, the sense function (SENSE) of the SENSE/ADJ pin applies to fixed output voltage models only, whereas the adjust input function (ADJ) applies to adjustable output voltage models only. For example, Figure 1 shows the sense function, and Figure 2 shows the adjust input function.

The ADP7105 output noise voltage is 15 μV rms and is inde-pendent of the output voltage. A digital power-good output allows power system monitors to check the health of the output voltage. A user programmable precision undervoltage lockout function facilitates sequencing of multiple power supplies.

The ADP7105 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages. The LFCSP offers a very compact solution and provides excellent thermal performance for applications that require up to 500 mA of output current in a small, low profile footprint.

APPLICATIONS

  • Regulation of noise sensitive applications:
    ADC and DAC circuits, precision amplifiers,
    high frequency oscillators, clocks, and PLLs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation

FEATURES and BENEFITS

  • Input voltage range: 3.3 V to 20 V
  • Maximum output current: 500 mA
  • Low noise: 15 μV rms for fixed output versions
  • PSRR performance of 60 dB at 10 kHz, VOUT = 3.3 V
  • Reverse current protection
  • Low dropout voltage:
    350 mV at 500 mA
  • Initial accuracy: ±0.8%
  • Accuracy over line, load, and temperature: −2% to +1%
  • Low quiescent current: 900 μA at VIN = 10 V, IOUT = 500 mA
  • Low shutdown current: <50 μA at VIN = 12 V, stable with small 1 μF ceramic output capacitor
  • 3 fixed output voltage options:
    1.8, 3.3 V and 5 V
  • See datasheet for additional features

Typical Application Circuit Diagram for ADP7105

Documentation

Title Content Type File Type
ADP7105: 20 V, 500 mA, Low Noise LDO Regulator with Soft Start Data Sheet (Rev A, 05/2014) (pdf, 811 kB) Data Sheets PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
Videos HTML
Glossary of EE Terms Glossary HTML

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

Evaluation Kits & Symbols & Footprints

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

ADP7105 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP7105ACPZ-1.8-R7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $1.43 Y  Material Info PCN Purchase Sample
ADP7105ACPZ-3.3-R7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $1.43 Y  Material Info PCN Purchase Sample
ADP7105ACPZ-5.0-R7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $1.43 Y  Material Info PCN Purchase Sample
ADP7105ACPZ-R2 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 250 - - Y  Material Info PCN Purchase
ADP7105ACPZ-R7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $1.43 Y  Material Info PCN Purchase Sample
ADP7105ARDZ Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Tube, 98 $2.50 $1.75 Y  Material Info Notify Me Purchase Sample
ADP7105ARDZ-1.8 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Tube, 98 $2.50 $1.75 Y  Material Info Notify Me Purchase Sample
ADP7105ARDZ-1.8-R7 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Reel, 1000 - $1.50 Y  Material Info Notify Me Purchase
ADP7105ARDZ-3.3 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Tube, 98 $2.50 $1.75 Y  Material Info Notify Me Purchase Sample
ADP7105ARDZ-3.3-R7 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Reel, 1000 - $1.50 Y  Material Info Notify Me Purchase
ADP7105ARDZ-5.0 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Tube, 98 $2.50 $1.75 Y  Material Info Notify Me Purchase Sample
ADP7105ARDZ-5.0-R7 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Reel, 1000 - $1.50 Y  Material Info Notify Me Purchase
ADP7105ARDZ-R7 Status: Production 8 ld SOIC-EP (2.41mm Exposed pad) 8 Ind Reel, 1000 - $1.50 Y  Material Info Notify Me Purchase
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.


沪ICP备09046653号
content here.
content here.

Review this Product

Close