ADP7105

20 V, 500 mA, Low Noise LDO Regulator with Soft Start
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Product Details

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

Product Lifecycle

checked 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.

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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.

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Overview

3 Reviews
3 out of 3 (100%) customers recommend this product.
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Most Helpful Review

by rosecom
Obtaining less than 0.3V dropout at 400mA output in an adjustable voltage application. Did follow the datasheet recommendations for additional noise reduction components though. Overall very satisfied with resulting performance.

Most Recent Review

by Miro
It is nice, small a easy to use LDO with wide range of accepted input voltage.

All Reviews

by Miro, 9 Dec 14
Nice LDO
It is nice, small a easy to use LDO with wide range of accepted input voltage.
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by KKK, 6 Mar 14
Good service ans support
Receive the samples quickly! Thanks for ADI's great help and support!
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by rosecom, 11 Dec 13
very good adjustable regulator
Obtaining less than 0.3V dropout at 400mA output in an adjustable voltage application. Did follow the datasheet recommendations for additional noise reduction components though. Overall very satisfied with resulting performance.
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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.


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