LTC3104

RECOMMENDED FOR NEW DESIGNS

2.6μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter and 10mA LDO

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Overview

  • Ultralow Quiescent Current: 2.6μA
  • Synchronous Rectification Efficiency Up to 95%
  • Wide VIN Range: 2.5V to 15V
  • Wide VOUT Range: 0.6V to 13.8V
  • 300mA Output Current
  • User-Selectable Automatic Burst Mode® Operation or Forced Continuous Operation
  • Accurate and Programmable RUN Pin Threshold
  • 1.2MHz Fixed Frequency PWM
  • Internal Compensation
  • Power Good Status Output for VOUT
  • 10mA Adjustable LDO
  • n Available in Thermally Enhanced 3mm × 4mm × 0.75mm, 14-Lead DFN and 16-Lead MSOP Packages

The LTC3104 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. The LTC3104 includes an integrated, adjustable 10mA LDO to power noise sensitive functions.

The LTC3104 offers two operational modes: automatic Burst Mode operation and forced continuous mode allowing the user to optimize output voltage ripple, noise and light load efficiency. With Burst Mode operation enabled, the typical DC input supply current at no load drops to 2.6μA, maximizing the efficiency for light loads. Selection of forced continuous mode provides very low noise constant frequency, 1.2MHz operation.

Additionally, the LTC3104 includes an accurate RUN comparator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the power system start-up is well controlled.

Applications

  • Remote Sensor Networks
  • Distributed Power Systems
  • Multicell Battery or SuperCap Regulator
  • Energy Harvesters
  • Portable Instruments
  • Low Power Wireless Systems
LTC3104
2.6μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter and 10mA LDO
Figure 5. LTC3104 Adds a 10mA Low Noise Linear Regulator. Efficiency vs Output Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
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Power System Management (PSM) & Sequencers 1
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Protection Switches & Controllers 1
LTC4359
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Supervisory Circuits & Reset ICs 1
LTC2934
PRODUCTION Ultra-Low Power Adjustable Supervisor with Power-Fail Output
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3104
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
schematic 1
DC1754A

LTC3104EDE Demo Board | 2.5V to 15V input, 3.3V at 300mA (Buck) and 1.8V at 10mA (LDO)

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Product Details

Demonstration Circuit 1754A features the LTC3104, a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. The IC operates with a fixed frequency oscillator at 1.2MHz. The LTC3104 also incorporates a programmable LDO which can be operated from VIN, VOUT or an independent supply. The LDO can also be independently turned off or on.


The LTC3104 operates with a 2.5V to 15V input voltage range. The demo board has been designed with the main output set to 3.3V and the LDO output (VLDO) to 1.8V.


 
DC1754A
LTC3104EDE Demo Board | 2.5V to 15V input, 3.3V at 300mA (Buck) and 1.8V at 10mA (LDO)
DC1754A - Schematic

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