LTC3129-1

RECOMMENDED FOR NEW DESIGNS

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

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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)
  • Fixed Output Voltage with Eight User-Selectable Settings from 2.5V to 15V
  • 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
LTC3129-1
15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current
Efficiency and Power Loss vs Load Product Package 1 Product Package 2
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Documentation

Data Sheet 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
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 2

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
schematic 2
schematic 3
schematic 4
schematic 5
DC1923A

LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA

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Product Details

Demonstration circuit 1923A features the LTC3129-1, a high efficiency 200mA output buck-boost DC/DC converter with a wide VIN and VOUT range. The DC1923A operates with a 2.42V to 15V input voltage range, and has been designed with the output voltage set to 5V. The demo board can be programmed to any of eight voltage settings (2.5V, 3.3V, 4.1V, 5V, 6.9V, 8.2V, 12V, 15V) by using jumpers.


 
DC1923A
LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA
DC1923A Demo Board DC1923A Demo Board DC1923A Demo Board DC1923A Demo Board DC1923A - Schematic

Reference Designs

Figure 1. Weigh Scale System Using the AD4170-4 (Simplified Schematic: All Connections Not Shown)
Figure 1. Weigh Scale System Using the AD4170-4 (Simplified Schematic: All Connections Not Shown)
EVAL-AD4170-4 Board Photo Angle View
EVAL-AD4170-4 Board Photo Bottom View
EVAL-AD4170-4 Board Photo Top View
CN0608 Circuits from the lab

Precision Weigh Scale Design Using the AD4170-4, Low Noise, Precision, 24-Bit Σ-Δ ADC with Internal PGA

View Detailed Reference Design

Features and Benefits

  • Full featured evaluation board for the AD4170-4
  • On-board 2.5 V ADR4525 and LTC6655 references
  • SMB connectors for AC/DC inputs
  • ADXL10002 on-board vibration sensor
  • PC control in conjunction with Analog Devices, Inc., SDP (EVALSDP-CK1Z)
  • PC software for control and data analysis (time domain and frequency domain)
  • Compatible interface with ACE, IIO Scope, Python, and MATLAB
CN0600
Weigh Scale Design Using the AD4190-4, Low Noise, Precision, 24-Bit Σ-Δ ADC with Internal PGA
Figure 1. Weigh Scale System Using the AD4190-4 (Simplified Schematic: All Connections Not Shown)
CN0601
Precision Weigh Scale Design Using a 24-Bit Sigma-Delta ADC with Internal PGA and AC Excitation
Figure 1. Weigh Scale (AC Excitation)
CN0608
Precision Weigh Scale Design Using the AD4170-4, Low Noise, Precision, 24-Bit Σ-Δ ADC with Internal PGA
Figure 1. Weigh Scale System Using the AD4170-4 (Simplified Schematic: All Connections Not Shown)
EVAL-AD4170-4 Board Photo Angle View
EVAL-AD4170-4 Board Photo Bottom View
EVAL-AD4170-4 Board Photo Top View

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