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LT3042 Linear Regulator: Datasheet, Applications and Features [FAQ]

Author: Irene
Date: 13 Apr 2022
 322
lt3042 regulator

 

Catalog

Description

Pin Configuration

Block Diagram

Typical Application

Features

Applications

Datasheet

Technical Specifications

Manufacturer

Using Warning

FAQ

Description

The LT3042 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB.

 

Pin Configuration

Figure-LT3042-Pin-Configuration

 

Figure: LT3042 Pin Configuration

 

Block Diagram

Figure-LT3042-Block-Diagram

 

Figure: LT3042 Block Diagram

 

Typical Application

Figure-LT3042-Typical-Application

 

Figure: LT3042 Typical Application

 

Features

  • Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz)
  • Ultralow Spot Noise: 2nV/√Hz at 10kHz
  • Ultrahigh PSRR: 79dB at 1MHz
  • Output Current: 200mA
  • Wide Input Voltage Range: 1.8V to 20V
  • Single Capacitor Improves Noise and PSRR
  • 100µA SET Pin Current: ±1% Initial Accuracy
  • Single Resistor Programs Output Voltage
  • High Bandwidth: 1MHz
  • Programmable Current Limit
  • Low Dropout Voltage: 350mV
  • Output Voltage Range: 0V to 15V
  • Programmable Power Good
  • Fast Start-Up Capability
  • Precision Enable/UVLO
  • Parallelable for Lower Noise and Higher Current
  • Internal Current Limit with Foldback
  • Minimum Output Capacitor: 4.7µF Ceramic
  • Reverse Battery and Reverse Current Protection
  • 10-Lead MSOP and 3mm×3mm DFN Packages

 

Applications

  • RF Power Supplies: PLLs, VCOs, Mixers, LNAs
  • Very Low Noise Instrumentation
  • High Speed/High Precision Data Converters
  • Medical Applications: Imaging, Diagnostics
  • Precision Power Supplies
  • Post-Regulator for Switching Supplies

 

Datasheet

LT3042-Datasheet

 

Technical Specifications

Part Number: LT3042MPMSE#PBF
Physical
Case/Package MSOP
Mount Surface Mount
Number of Pins 10
 
Technical
Dropout Voltage 350 mV
Max Operating Temperature 150 °C
Min Current Limit 220 mA
Min Operating Temperature -55 °C
Number of Regulators 1
Output Current 200 mA
Output Voltage 15 V
Schedule B 8542390000
 
Compliance
RoHS Compliant

 

Manufacturer

Analog Devices, Inc. (ADI), also known simply as Analog, is an American multinational semiconductor company specializing in data conversion, signal processing and power management technology, headquartered in Wilmington, Massachusetts. In 2012, Analog Devices led the worldwide data converter market with a 48.5% share, according to analyst firm Databeans.

 

Using Warning

Note: Please check their parameters and pin configuration before replacing them in your circuit.

 

FAQ

Is there a thermal limit on the LT3042?

The LT3042 is stable with a minimum 4.7 μF ceramic output capacitor. Built-in protection includes reverse battery protection, reverse current protection, internal current limit with foldback, and thermal limit with hysteresis. The LT3042 is available in thermally enhanced 10-lead MSOP and 3 mm × 3 mm DFN packages.


What is the current reference for the LT3042 linear regulator?

Designed as a precision current reference followed by a high-performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise, increase output current, and spread heat on the PCB. The device supplies 200 mA at a typical 350 mV dropout voltage.


What kind of MSOP does the LT3042 come in?

The LT3042 is available in thermally enhanced 10-Lead MSOP and 3mm × 3mm DFN packages. This product has been released to the market. The data sheet contains all final specifications and operating conditions.

 

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