LTC3129

RECOMMENDED FOR NEW DESIGNS

15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current

Data Sheet Product Selection Table
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Overview

  • Regulates VOUT Above, Below or Equal to VIN
  • Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up (Bootstrapped)
  • Wide VOUT Range: 1.4V to 15.75V
  • 200mA Output Current in Buck Mode
  • Single Inductor
  • 1.3μA Quiescent Current
  • Programmable Maximum Power Point Control
  • 1.2MHz Ultralow Noise PWM
  • Current Mode Control
  • Pin Selectable Burst Mode® Operation
  • Up to 95% Efficiency
  • Accurate RUN Pin Threshold
  • Power Good Indicator
  • 10nA Shutdown Current
  • Thermally Enhanced 3mm × 3mm QFN and 16-Lead MSOP Packages
LTC3129
15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current
Efficiency and Power Loss vs Load Package 1 Package 2
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 2

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
Ideal Diodes and PowerPath Controllers 1
LTC4417
RECOMMENDED FOR NEW DESIGNS Prioritized PowerPath™ Controller
Overvoltage & Overcurrent Protectors 1
LTC4365
RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3129
  • LTC3129-1
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
DC1922A

LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, VOUT = 5V @ 200mA

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Product Details

Demonstration Circuit 1922A features the LTC3129, a high efficiency 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. The DC1922A demo board has two user selectable operating modes: Burst Mode® Operation and Fixed Frequency PWM (JP3). There is also an accurate programmable RUN pin which is used to ENABLE the converter (JP1). The LTC3129 also incorporates a maximum power point control function which can be enabled (JP2) for applications where the input source is a solar cell or is high impedance, such as intrinsically safe applications or high ZOUT thermal electric generators (TEGs).

The DC1922A operates with a 2.42V to 15V input voltage range, and has been designed with the output voltage set to 5.0V. Once the converter is started the LTC3129 can operate with VIN as low as 1.92V provided VCC is backfed. The demo board has optional provisions to backfeed VCC (D1) in order to increase efficiency in some 5V output applications, or to allow operation with VIN down to 1.92V.

DC1922A
LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, VOUT = 5V @ 200mA
DC1922A - Schematic

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