LTC3112 - 15V, 2.5A Synchronous Buck-Boost DC/DC Converter
Features
- 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
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC®3112 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3112EDHD#PBF | 5x4 DFN-16 | DHD | E | 05-08-1707 | Yes |
| LTC3112EDHD#TRPBF | 5x4 DFN-16 | DHD | E | 05-08-1707 | Yes |
| LTC3112EFE#PBF | TSSOP-20 | FE | E | 05-08-1663 (CA) | Yes |
| LTC3112EFE#TRPBF | TSSOP-20 | FE | E | 05-08-1663 (CA) | Yes |
| LTC3112HDHD#PBF | 5x4 DFN-16 | DHD | H | 05-08-1707 | Yes |
| LTC3112HDHD#TRPBF | 5x4 DFN-16 | DHD | H | 05-08-1707 | Yes |
| LTC3112HFE#PBF | TSSOP-20 | FE | H | 05-08-1663 (CA) | Yes |
| LTC3112HFE#TRPBF | TSSOP-20 | FE | H | 05-08-1663 (CA) | Yes |
| LTC3112IDHD#PBF | 5x4 DFN-16 | DHD | I | 05-08-1707 | Yes |
| LTC3112IDHD#TRPBF | 5x4 DFN-16 | DHD | I | 05-08-1707 | Yes |
| LTC3112IFE#PBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
| LTC3112IFE#TRPBF | TSSOP-20 | FE | I | 05-08-1663 (CA) | Yes |
| LTC3112MPDHD#PBF | 5x4 DFN-16 | DHD | MP | 05-08-1707 | Yes |
| LTC3112MPDHD#TRPBF | 5x4 DFN-16 | DHD | MP | 05-08-1707 | Yes |
| LTC3112MPFE#PBF | TSSOP-20 | FE | MP | 05-08-1663 (CA) | Yes |
| LTC3112MPFE#TRPBF | TSSOP-20 | FE | MP | 05-08-1663 (CA) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3112EDHD#PBF | 5x4 DFN-16 | E | $5.71 | $4.00 | Yes | |
| LTC3112EDHD#TRPBF | 5x4 DFN-16 | E | $4.06 | Yes | ||
| LTC3112EFE#PBF | TSSOP-20 | E | $5.93 | $4.15 | Yes | |
| LTC3112EFE#TRPBF | TSSOP-20 | E | $4.21 | Yes | ||
| LTC3112HDHD#PBF | 5x4 DFN-16 | H | $6.64 | $4.65 | Yes | |
| LTC3112HDHD#TRPBF | 5x4 DFN-16 | H | $4.71 | Yes | ||
| LTC3112HFE#PBF | TSSOP-20 | H | $6.89 | $4.82 | Yes | |
| LTC3112HFE#TRPBF | TSSOP-20 | H | $4.88 | Yes | ||
| LTC3112IDHD#PBF | 5x4 DFN-16 | I | $6.29 | $4.40 | Yes | |
| LTC3112IDHD#TRPBF | 5x4 DFN-16 | I | $4.46 | Yes | ||
| LTC3112IFE#PBF | TSSOP-20 | I | $6.53 | $4.57 | Yes | |
| LTC3112IFE#TRPBF | TSSOP-20 | I | $4.63 | Yes | ||
| LTC3112MPDHD#PBF | 5x4 DFN-16 | MP | $16.97 | $11.88 | Yes | |
| LTC3112MPDHD#TRPBF | 5x4 DFN-16 | MP | $11.94 | Yes | ||
| LTC3112MPFE#PBF | TSSOP-20 | MP | $17.62 | $12.33 | Yes | |
| LTC3112MPFE#TRPBF | TSSOP-20 | MP | $12.39 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1598A | LTC3112EDHD Demo Board | $150.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3112HDHD#PBF | 5x4 DFN-16 | H | $6.64 | $4.65 | Yes | |
| LTC3112HDHD#TRPBF | 5x4 DFN-16 | H | $4.71 | Yes | ||
| LTC3112HFE#PBF | TSSOP-20 | H | $6.89 | $4.82 | Yes | |
| LTC3112HFE#TRPBF | TSSOP-20 | H | $4.88 | Yes | ||
| LTC3112IDHD#PBF | 5x4 DFN-16 | I | $6.29 | $4.40 | Yes | |
| LTC3112IDHD#TRPBF | 5x4 DFN-16 | I | $4.46 | Yes | ||
| LTC3112IFE#PBF | TSSOP-20 | I | $6.53 | $4.57 | Yes | |
| LTC3112IFE#TRPBF | TSSOP-20 | I | $4.63 | Yes | ||
| LTC3112MPDHD#PBF | 5x4 DFN-16 | MP | $16.97 | $11.88 | Yes | |
| LTC3112MPDHD#TRPBF | 5x4 DFN-16 | MP | $11.94 | Yes | ||
| LTC3112MPFE#PBF | TSSOP-20 | MP | $17.62 | $12.33 | Yes | |
| LTC3112MPFE#TRPBF | TSSOP-20 | MP | $12.39 | Yes | ||
| Buy Now • Request Samples | ||||||
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
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Design Tools
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LTC3112
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
