LTC3124
RECOMMENDED FOR NEW DESIGNS15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect
- Part Models
- 10
- 1ku List Price
- Starting From $4.95
Overview
- VIN Range: 1.8V to 5.5V, 500mV After Start-Up
- Adjustable Output Voltage: 2.5V to 15V
- 1.5A Output Current for VIN = 5V and VOUT = 12V
- Dual-Phase Control Reduces Output Voltage Ripple
- Output Disconnects from Input When Shut Down
- Synchronous Rectification: Up to 95% Efficiency
- Inrush Current Limit
- Up to 3MHz Programmable Switching Frequency Synchronizable to External Clock
- Selectable Burst Mode® Operation: 25μA IQ
- Output Overvoltage Protection
- Internal Soft-Start
- <1μA IQ in Shutdown
- 16-Lead, Thermally-Enhanced 3mm × 5mm × 0.75mm DFN and TSSOP Packages
The LTC3124 is a dual-phase, synchronous step-up DC/DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, minimizing inductor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV.
The LTC3124 switching frequency can be programmed from 100kHz to 3MHz to optimize applications for highest efficiency or smallest solution footprint. The oscillator can be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25μA, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up.
Other features include a <1μA shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3124 is offered in both 16-lead DFN and thermally-enhanced TSSOP packages.
Applications
- RF, Microwave Power Amplifiers
- Piezo Actuators
- Small DC Motors, Thermal Printers
- 12V Analog Rail from Battery, 5V, or Backup Capacitor
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 |
|---|---|---|---|
| LTC3124EDHC#PBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC3124EDHC#TRPBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC3124EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LTC3124EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LTC3124HFE#PBF | 16-Lead TSSOP w/ EP | ||
| LTC3124HFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LTC3124IDHC#PBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC3124IDHC#TRPBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC3124IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LTC3124IFE#TRPBF | 16-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3124EDHC#PBF | PRODUCTION | |
| LTC3124EDHC#TRPBF | PRODUCTION | |
| LTC3124EFE#PBF | PRODUCTION | |
| LTC3124EFE#TRPBF | PRODUCTION | |
| LTC3124HFE#PBF | PRODUCTION | |
| LTC3124HFE#TRPBF | PRODUCTION | |
| LTC3124IDHC#PBF | PRODUCTION | |
| LTC3124IDHC#TRPBF | PRODUCTION | |
| LTC3124IFE#PBF | PRODUCTION | |
| LTC3124IFE#TRPBF | PRODUCTION | |
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3124EFE#PBF | PRODUCTION | |
| LTC3124EFE#TRPBF | PRODUCTION | |
| LTC3124HFE#PBF | PRODUCTION | |
| LTC3124HFE#TRPBF | PRODUCTION | |
| LTC3124IFE#PBF | PRODUCTION | |
| LTC3124IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3124EFE#PBF | PRODUCTION | |
| LTC3124EFE#TRPBF | PRODUCTION | |
| LTC3124HFE#PBF | PRODUCTION | |
| LTC3124HFE#TRPBF | PRODUCTION | |
| LTC3124IFE#PBF | PRODUCTION | |
| LTC3124IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3124
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LTC3124
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.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
LTC3124 Demo Board | 2-Phase Sync Boost, 1.8V ≤ VIN ≤ 5.5V, VOUT = 12V @ Up to 1.5A