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LTC3112: 15V, 2.5A Synchronous Buck-Boost DC/DC Converter Data Sheet9/23/2016PDF633K
Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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R526 Reliability Data3/26/2018PDF365 K
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DC1598A - Demo Manual1/12/2011PDF788K
Tools & Simulations
LTspice
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To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTC3112
Reference Designs (1)
Design Resources
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.
PCN-PDN Information
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Sample & Buy
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Lead Times
Please see the latest communication from our CCO regarding lead times.
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.