ADP7105

RECOMMENDED FOR NEW DESIGNS

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

Part Models
13
1ku List Price
Starting From $1.53
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Part Details

  • 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%, TJ = −40°C to +125°C
    • −1.25% to +1%, TJ = 0°C to +85°C
  • 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
  • Adjustable output from 1.22 V to 19 V
  • Programmable soft start for inrush current control
  • Foldback current-limit and thermal overload protection
  • User programmable precision UVLO/enable
  • Power-good indicator
  • 8-lead LFCSP and 8-lead SOIC packages
ADP7105
20 V, 500 mA, Low Noise LDO Regulator with Soft Start
ADP7105 pin configuration ADP7105 Pin Configuration ADP7105 Circuit Diagram ADP7105 Circuit Diagram
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Hardware Ecosystem

Parts Product Life Cycle Description
ADP7104 RECOMMENDED FOR NEW DESIGNS 20 V, 500 mA, Low Noise, CMOS LDO
LT1763 RECOMMENDED FOR NEW DESIGNS 500mA, Low Noise, LDO Micropower Regulators
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Tools & Simulations

LTspice 1


Models for the following parts are available in LTspice:

  • ADP7105
  • ADP7105-1.8
  • ADP7105-3.3
  • ADP7105-5.0

ADI Linear Regulator Design Tool and Parametric Search

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Open Tool
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.


Evaluation Kits

eval board
EVAL-ADICUP360

Arduino form factor compatible ARM Cortex-M3 Development Platform

Features and Benefits

  • Compatible with Arduino and PMOD form factors
  • Low Power ARM Cortex M3
  • Open Source IDE Tools
  • No External Debugger/Emulator Tools needed

Product Details

The EVAL-ADICUP360 is an Arduino and PMOD compatible form factor development board. The board uses CrossCore Embedded Studio, an open source Eclipse based Interactive Development Environment (IDE), which can be downloaded free of charge. The platform contains many hardware and software example projects, to make it easier for customers to prototype/create systems and solutions using the complete ecosystem provided.


The EVAL-ADICUP360 uses the ADuCM360 Arm Cortex-M3 processor as the main device on board.  It has integrated dual 24-bit sigma delta converters on chip, which make it extremely flexible for both analog and digital application.

eval board
ADSKPMB10-EV-FMCZ

Single-Channel, Fully Isolated, Low Latency Data Acquisition System (DAQ)

Features and Benefits

  • Fully Isolated PMOD-to-FMC interposer board
  • Software programmable bipolar input ranges (±1.1 V to ±11.0 V)
    • Allows single-ended and differential signals
  • GΩ input impedance allows direct interface with sensors
  • On-board 5 V reference and buffer
  • Complete power management solution
  • SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
  • PC software for control and data analysis of time and frequency domain

Product Details

The ADSKPMB10-EV-FMCZ signal chain kit is a two-board solution, which consists of a Precision Medium Bandwidth Data Acquisition Solution on a PMOD form factor and a Fully Isolated PMOD-to-FMC interposer board.

The Precision Medium Bandwidth Data Acquisition Solution features a discrete programmable gain instrumentation amplifier (PGIA) that was built using a 30V, High Speed, Low Noise, Low Bias Current, JFET Operational Amplifier, the ADA4627-1, a Precision Quad Matched Resistor Network, the LT5400, a Low Capacitance, 4-Channel, ±15 V/+12 V iCMOS Multiplexer, the ADG1209 and the internal Fully Differential Amplifier (FDA) ADC driver of the ADAQ4003. The PGIA in thru front-end offers high input impedance that allows direct interface with a variety of sensors. A programmable gain is often needed to adapt the circuit to different input signal amplitudes—unipolar or bipolar and single-ended or differential with varying common-mode voltages. The PGIA works with the ADAQ4003, an 18-Bit, 2 MSPS, µModule® Data Acquisition Solution.

The Fully Isolated PMOD-to-FMC interposer board was designed using a Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control, the LT3999, a Robust 3.0kVrms Digital Isolators w/ Fail-Safe for the SPI lines and PGIA gain control pins, the ADuM152N and the ADuM120N, and a Low noise and ultra-low noise LDO regulators the ADP7105 and the ADP150N respectively.

APPLICATIONS

  • Data acquisition and system monitoring
  • Automated test equipment
  • Instrumentation 
  • Medical equipment

eval board
EVAL-ADA8282

ADA8282 Evaluation Board

Features and Benefits

  • Ready SPI interface for setup and control
  • Easy connection to test equipment

Product Details

The ADA8282CP-EBZ is designed to aid in the evaluation of the ADA8282 radar receive path analog front-end (AFE). The board connects to the system demonstration platform (SDP) for easy configuration of registers through SPI, along with headers to allow configuration using other platforms. It also includes on-board options to provide manual reset capability to the part.

This user guide provides quick start instructions for working with the board.

Full specifications for the ADA8282 are available in the product data sheet, which should be consulted in conjunction with this user guide when using the evaluation board.

EVAL-ADICUP360
Arduino form factor compatible ARM Cortex-M3 Development Platform
ADICUP360ANGLE-web ADICUP360BOTTOM-web ADICUP360TOP-web
ADSKPMB10-EV-FMCZ
Single-Channel, Fully Isolated, Low Latency Data Acquisition System (DAQ)
ADSKPMB10-EV-FMCZ ADSKPMB10-EV-FMCZ - Top View ADSKPMB10-EV-FMCZ - Bottom View ADSKPMB10-EV-FMCZ Kit with SDP-H1 ADSKPMB10-EV-FMCZ Kit with SDP-H1 - Top View
EVAL-ADA8282
ADA8282 Evaluation Board
ADA8282CP Evaluation Board

Reference Designs

NDIR Gas Sensing Circuit
CN0338 Circuits from the lab

NDIR Thermopile-Based Gas Sensing Circuit

Features and Benefits

  • Gas sensor based on NDIR
  • Optimized for CO2
  • Arduino shield form factor for rapid prototyping
Simplified Circuit Block Diagram
CN0409 Circuits from the lab

Low to High Level Water Turbidity Measurement System

Features and Benefits

  • 0-4000 FTU Measurement
  • +/-0.5 FTU system accuracy (0-1000 FTU)
  • Ambient light rejection
CN0338
NDIR Thermopile-Based Gas Sensing Circuit
NDIR Gas Sensing Circuit
CN0338 Evaluation Board
CN0338 Evaluation Board - Bottom View
CN0338 Evaluation Board - Top View
CN0409
Low to High Level Water Turbidity Measurement System
Simplified Circuit Block Diagram
EVAL-CN0409-ARDZ Evaluation Board
EVAL-CN0409-ARDZ Evaluation Board - Top View
EVAL-CN0409-ARDZ Evaluation Board - Bottom View

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