LT3061 Series
Info : RECOMMENDED FOR NEW DESIGNS
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LT3061 Series

45V VIN, Micropower, Low Noise, 100mA LDO with Active Output Discharge

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Models 32
1ku List Price Starting From $1.88
Features
  • Input Voltage Range: 1.6V to 45V
  • Output Current: 100mA
  • Output Discharge
  • Quiescent Current: 45μA
  • Dropout Voltage: 250mV
  • Low Noise: 30μVRMS (10Hz to 100kHz)
  • Adjustable Output (VREF = 600mV)
  • Fixed Output Voltages: 3.3V, 5V
  • Output Tolerance: ±2% Over Load, Line, and Temperature
  • Single Capacitor Soft-Starts Reference and Lowers Output Noise
  • Shutdown Current: < 3μA
  • Reverse Battery Protection
  • Current Limit Foldback and Thermal Limit Protection
  • 8-Lead 2mm × 3mm DFN and MSOP Packages
Additional Details
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The LT3061 is a micropower, low dropout (LDO) linear regulator that operates over a 1.6V to 45V supply range and is available in a series of fixed output and adjustable versions. The device supplies 100mA of output current with a typical dropout voltage of 250mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality. The LT3061’s quiescent current is merely 45μA and provides fast transient response with a minimum 3.3μF output capacitor. In shutdown, quiescent current is less than 3μA and the reference soft start capacitor is reset.

The LT3061 features an NMOS pull-down that discharges the output when SHDN or IN is driven low.

Internal protection circuitry includes reverse-battery protection, reverse-current protection, current limit with foldback and thermal shutdown.

The LT3061 is available in fixed output voltages of 3.3V and 5V, and as an adjustable device with an output voltage range from the 600mV reference up to 19V. The LT3061 is offered in the thermally enhanced 8-lead 2mm × 3mm DFN and MSOP packages.

Applications

  • Battery Powered Systems
  • Automotive Power Supplies
  • Industrial Power Supplies
  • Avionic Power Supplies
  • Portable Instruments
Part Models 32
1ku List Price Starting From $1.88

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Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem

Evaluation Kits 1

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DC2177A-A

LT3061 Demo Board | Micropower, Low Noise LDO with Output Discharge, 2.1V ≤ VIN ≤ 45V, VOUT = 1.2V to 5V @ 100mA

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DC2177A-A

LT3061 Demo Board | Micropower, Low Noise LDO with Output Discharge, 2.1V ≤ VIN ≤ 45V, VOUT = 1.2V to 5V @ 100mA

LT3061 Demo Board | Micropower, Low Noise LDO with Output Discharge, 2.1V ≤ VIN ≤ 45V, VOUT = 1.2V to 5V @ 100mA

Product Detail

Demonstration circuit 2177A-A features the LT3061, a micropower, low noise and low dropout voltage linear regulator with output discharge. The input voltage ranges from 2.1V to 45V and the maximum output current is 100mA. A resistor divider determines the output voltage, and a jumper adjusts the divider to set the output voltage to either 1.2V, 1.5V, 1.8V, 2V, 2.5V, 3.3V, 5V or a voltage that is user-programmed but requires the installation of a resistor. The output uses a 10μF ceramic capacitor and the internal reference is bypassed with a 10nF capacitor to reduce output noise and program the soft-start. There is also a 10nF feedforward capacitor to improve load transient response and decrease noise at higher output voltages. The position of the VOUTEN jumper either pulls up the SHDN pin to the input supply through a 100k resistor, shorts SHDN to ground or floats the SHDN pin so it can be driven directly by a signal applied to the SHDN terminal.

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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