ADM7172
Info : RECOMMENDED FOR NEW DESIGNS
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ADM7172

6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 10
1ku List Price Starting From $2.30
Features
  • Download ADM7172-KGD Data Sheet. Available as Known Good Die and fully guaranteed to data sheet specifications.
  • Input voltage range: 2.3 V to 6.5 V
  • Maximum load current: 2 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 1.5 A load step
  • 60 dB PSRR at 100 kHz
  • Low dropout voltage: 172 mV at 2 A 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
  • Adjustable and fixed output voltage options: 1.2 V to 5.0 V
  • Adjustable output from 1.2 V to VIN − VDO
  • Precision enable
  • Adjustable soft start
  • 8-lead 3 mm × 3 mm LFCSP package
  • Supported by ADIsimPower tool
Additional Details
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The ADM7172 is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 2 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 1.5 A load step.

The ADM7172 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 ADM7172 regulator output noise is 5 μV rms, independent of the output voltage. The ADM7172 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 2 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
Part Models 10
1ku List Price Starting From $2.30

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADM7172-4.2-KGD-WP
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ADM7172ACPZ-1.3-R7
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ADM7172ACPZ-1.8-R7
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ADM7172ACPZ-2.5-R7
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ADM7172ACPZ-3.0-R7
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ADM7172ACPZ-3.3-R7
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ADM7172ACPZ-4.2-R7
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ADM7172ACPZ-5.0-R7
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ADM7172ACPZ-R2
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ADM7172ACPZ-R7
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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AD-PAARRAY3552R-SL

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

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AD-PAARRAY3552R-SL

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

Features and Benefits

  • Designed to cover full Tx signal chains with integrated MCU and user-friendly GUI for faster and easier integration
  • Supports fault event protection - overvoltage (OV), overcurrent (OC), and overtemperature (OT)
  • Supports ultrafast sub-µs GaN gate voltage switching ~ (<1 µs)
  • Supports ultrafast (<10 µs) fault event protection from detection up to GaN gate pinch-off
  • Wide range of gate bias voltages from -10 V to +10 V
  • Configurable power-up and power-down sequence

Product Detail

The AD-PAARRAY3552R-SL reference design provides control, protection, and proper biasing sequence for GaN power amplifier (PA) arrays. The design incorporates the AD3553R high-speed, dual-channel, 16-bit DAC to support the ultrafast sub-µs voltage settling time of GaN gates.

Key fault events, including overvoltage, overcurrent, and overtemperature, are effectively managed by the LTC7000, a static switch driver responsible for system fault protection.

The on-board MAX32666 ultralow-power ARM® Cortex®-M4 microprocessor provides essential debug and programming features for a comprehensive software development experience with the system. The system's firmware is built on ADI's open-source no-OS framework and includes a user-friendly graphical interface (GUI) for evaluation. Updates are easily applied through an SWD UART bootloader, streamlining prototyping.

The system can be powered by an external +48 V supply, requiring high current capabilities.

APPLICATIONS

  • 5G massive MIMOs
  • Macro base stations
Specifications
Fault Events
Fault Default Limit
Overvoltage +55 V
Overcurrent 3.5 A
Overtemperature 75°C
Output Ports
Port Name No. of ports
GaN gate ports 6
+48 V Gan drain ports 4
+5 V ports 5
Enable ports 2
Power Supply
External +48 V DC at 5 A
Operating Conditions
Temperature Range 45°C to +75°C
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EVAL-ADM7170

ADM7170/ADM7171/ADM7172 Evaluation Board

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EVAL-ADM7170

ADM7170/ADM7171/ADM7172 Evaluation Board

ADM7170/ADM7171/ADM7172 Evaluation Board

Features and Benefits

  • Input voltage range: 2.3 V to 6.5 V
  • Output current range: 0 mA to 2 A (500 mA for ADM7170, 1 A for ADM7171, 2 A for ADM7172)
  • Output voltage accuracy: ±0.75% for ADM7170, −0.5%/+1% for ADM7171/ADM7172
  • Operating temperature range: −40°C to +125°C
  • Output voltage can also be adjusted up with two external resistors from any fixed output voltage option
  • VOUT = VOUT(FIXED) × (1 + R1/R2)

Product Detail

The ADM7170ACP-EVALZ/ADM717Q1CP-EVALZ/ ADM7172ACP-EVALZ is an evaluation board used to demonstrate the functionality of the ADM7170, ADM7171, and ADM7172 linear regulators.

Simple device measurements, such as line and load regulation, dropout, and ground current, can be demonstrated with just a single voltage source, a voltmeter, an ammeter, and load resistors.
Tools & Simulations

Tools & Simulations 2

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.

Reference Designs

Reference Designs 1

Isolated and Nonisolated RS-485 Transceiver Simplified Schematic

A Complete Two-Port Vector Network Analyzer  

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