Overview
Features and Benefits
- Wide VIN Range: 2.7V to 40V
- Wide VOUT Range: 2.7V to 40V
- 1A Output Current for VIN ≥ 3.6V, VOUT = 5V
- 2A Output Current in Step-Down Operation for VIN ≥ 6V
- Programmable Frequency: 100kHz to 2MHz
- Synchronizable Up to 2MHz with an External Clock
- Up to 95% Efficiency
- 30µA No-Load Quiescent Current in Burst Mode® Operation
- Ultralow Noise Buck-Boost PWM
- Internal Soft-Start
- 3µA Supply Current in Shutdown
- Programmable Input Undervoltage Lockout
- Small 4mm × 5mm × 0.75mm DFN Package
- Thermally Enhanced 20-Lead TSSOP Package
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter. Its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications. A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below or even equal to the output voltage and ensures seamless transitions between operational modes.
Programmable frequency PWM mode operation provides low noise, high efficiency operation and the ability to synchronize switching to an external clock. Switching frequencies up to 2MHz are supported to allow use of small value inductors for miniaturization of the application circuit. Pin selectable Burst Mode operation reduces standby current and improves light load efficiency which, combined with a 3µA shutdown current, make the LTC3115-1 ideally suited for battery-powered applications. Additional features include output disconnect in shutdown, short-circuit protection and internal soft-start. The LTC3115-1 is available in thermally enhanced 16-lead 4mm × 5mm × 0.75mm DFN and 20-lead TSSOP packages.
| Features | |
| LTC3115-1 | - |
| LTC3115-2 | Optimized for applications subject to fast (<1ms) input voltage transients |
APPLICATIONS
- 24V/28V Industrial Applications
- Automotive Power Systems
- Telecom, Servers and Networking Equipment
- FireWire Regulator
- Multiple Power Source Supplies
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 (1)
Documentation & Resources
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R526 Reliability Data3/26/2018
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DC1687A - Demo Manual4/24/2012
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2.7V to 40V, 2A, Sync Buck-Boost12/6/2011
Tools & Simulations
LTspice
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.
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:
LTC3115-1
LTC3115-2
Reference Designs (1)
Product Recommendations
LTC3115-1 Companion Parts
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.View our quality and reliability program and certifications for more information.
PCN-PDN Information
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Sample & Buy
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Lead Times
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Sampling
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.