LTC3127
RECOMMENDED FOR NEW DESIGNS1A Buck-Boost DC/DC Converter with Programmable Input Current Limit
- Part Models
- 4
- 1ku List Price
- Starting From $4.48
Overview
- Programmable (0.2A to 1A) ±4% Accurate Average Input Current Limit
- Regulated Output with Input Voltages Above, Below or Equal to the Output
- 1.8V to 5.5V (Input) and 1.8V to 5.25V (Output) Voltage Range
- 0.6A Continuous Output Current: VIN > 1.8V
- 1A Continuous Output Current: VIN > 3V
- Single Inductor
- Synchronous Rectification: Up to 96% Efficiency
- Burst Mode® Operation: IQ = 35μA (Pin Selectable)
- Output Disconnect in Shutdown
- <1μA Shutdown Current
- Small, Thermally Enhanced 10-Lead (3mm × 3mm × 0.75mm) DFN and 12-Lead MSOP Packages
The LTC3127 is a wide VIN range, highly efficient, 1.35MHz fixed frequency buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The LTC3127 features programmable average input current limit, making it ideal for power-limited input sources. The input current limit is programmed with a single resistor and is accurate from 0.2A to 1A of average input current.
The topology incorporated provides a continuous transfer function through all operating modes. Other features include <1μA shutdown current, pin-selectable Burst Mode operation and thermal overload protection. The LTC3127 is housed in thermally enhanced 10-lead (3mm × 3mm × 0.75mm) DFN packages and 12-lead MSOP packages.
Applications
- USB Powered GSM Modems
- Supercap Charger
- Handheld Test Instruments
- PC Card Modems
- Wireless Terminals
Documentation
Data Sheet 1
User Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3127EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC3127EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC3127EMSE#PBF | 12-Lead MSOP w/ EP | ||
| LTC3127EMSE#TRPBF | 12-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3127EMSE#PBF | PRODUCTION | |
| LTC3127EMSE#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC3127EMSE#PBF | PRODUCTION | |
| LTC3127EMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC3127EMSE#PBF | PRODUCTION | |
| LTC3127EMSE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3127
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
LTC3127EDD Demo Board | Programmable Average Input Current Limit, 1.2MHz, 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.8V @ 2A Pulsed
Resources
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