LTC3112
RECOMMENDED FOR NEW DESIGNS15V, 2.5A Synchronous Buck-Boost DC/DC Converter
- Part Models
- 16
- 1ku List Price
- Starting From $6.05
Overview
- Regulated Output with VIN Above, Below or Equal to VOUT
- 2.7V to 15V Input Voltage Range
- 2.5V to 14V Output Voltage Range
- 2.5A Continuous Output Current: VIN ≥ 5V, VOUT = 5V, PWM Mode
- Output Current Monitor
- Up to 95% Efficiency
- 750kHz Switching Frequency, Synchronizable Between 300kHz and 1.5MHz
- Internal N-Channel MOSFETs
- Selectable Burst Mode® Operation, IQ = 50μA
- Shutdown Current < 1μA
- Overvoltage Protection
- Output Disconnect in Shutdown
- Internal Soft-Start
- Small, Thermally Enhanced 16-Lead (4mm × 5mm × 0.75mm) DFN and 20-Lead TSSOP Package
The LTC3112 is a fixed frequency synchronous buck-boost DC/DC converter with an extended input and output range. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below or equal to the output voltage.
With an input range of 2.7V to 15V, the LTC3112 is wellsuited for a wide variety of single or multiple cell battery, backup capacitor or wall adapter source applications. Low RDS(ON) internal N-Channel MOSFET switches provide highly efficient operation in applications with higher load current requirements.
The LTC3112 features selectable PWM or Burst Mode operation, an easily synchronized oscillator and output disconnect in shutdown. An output current monitor circuit allows the load current to be controlled or measured. Other features include <1μA shutdown current, short circuit protection, soft-start, current limit and thermal shutdown.
The LTC3112 is offered in both a 16-pin (4mm × 5mm × 0.75mm) DFN and 20-pin TSSOP packages.
Applications
- 3.3V or 5V from 1, 2 or 3 Li-Ion, Backup Capacitor Stack
- Hand Held Inventory Terminals
- RF Transmitters
- 12V Synchronous Boost Converter
- Multiple Power Input Systems
- LED Lighting with Current Regulation
- 12V Lead Acid Battery to 12V
Documentation
Data Sheet 1
User Guide 1
Technical Articles 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 |
|---|---|---|---|
| LTC3112EDHD#PBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112EDHD#TRPBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3112EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3112HDHD#PBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112HDHD#TRPBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112HFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3112HFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3112IDHD#PBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112IDHD#TRPBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3112IFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LTC3112MPDHD#PBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112MPDHD#TRPBF | 16-Lead DFN (5mm x 4mm w/ EP) | ||
| LTC3112MPFE#PBF | 20-Lead TSSOP w/ EP | ||
| LTC3112MPFE#TRPBF | 20-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
||
| LTC3112EDHD#PBF | PRODUCTION | |
| LTC3112EDHD#TRPBF | PRODUCTION | |
| LTC3112EFE#PBF | PRODUCTION | |
| LTC3112EFE#TRPBF | PRODUCTION | |
| LTC3112HDHD#PBF | PRODUCTION | |
| LTC3112HDHD#TRPBF | PRODUCTION | |
| LTC3112HFE#PBF | PRODUCTION | |
| LTC3112HFE#TRPBF | PRODUCTION | |
| LTC3112IDHD#PBF | PRODUCTION | |
| LTC3112IDHD#TRPBF | PRODUCTION | |
| LTC3112IFE#PBF | PRODUCTION | |
| LTC3112IFE#TRPBF | PRODUCTION | |
| LTC3112MPDHD#PBF | PRODUCTION | |
| LTC3112MPDHD#TRPBF | PRODUCTION | |
| LTC3112MPFE#PBF | PRODUCTION | |
| LTC3112MPFE#TRPBF | PRODUCTION | |
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3112EFE#PBF | PRODUCTION | |
| LTC3112EFE#TRPBF | PRODUCTION | |
| LTC3112IFE#PBF | PRODUCTION | |
| LTC3112IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3112EFE#PBF | PRODUCTION | |
| LTC3112EFE#TRPBF | PRODUCTION | |
| LTC3112HFE#PBF | PRODUCTION | |
| LTC3112HFE#TRPBF | PRODUCTION | |
| LTC3112IFE#PBF | PRODUCTION | |
| LTC3112IFE#TRPBF | PRODUCTION | |
| LTC3112MPDHD#PBF | PRODUCTION | |
| LTC3112MPDHD#TRPBF | PRODUCTION | |
| LTC3112MPFE#PBF | PRODUCTION | |
| LTC3112MPFE#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
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| Ideal Diodes and PowerPath Controllers 2 | ||
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| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Tools & Simulations
LTspice 2
- LTC3112 Demo Circuit - Wide Input Voltage Range Buck-Boost Regulator (2.7-15V to 5V @ 2.5A)
- LTC3112 Demo Circuit - 5V Buck-Boost Supercap Backup Supply (2-15V to 2V @ 250mA)
Models for the following parts are available in LTspice:
- LTC3112
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
LTC3112EDHD Demo Board
Resources
Smart Camera for 3D & 2D sensing
Resources
Software
Reference Designs
USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System
Part Used
Design & Integration Tools
Videos
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CN0582: USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System