LTC3458L
1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
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Overview
Features and Benefits
- High Efficiency: Up to 95%
- Inrush Current Limiting and Output Disconnect
- Programmable Output Voltages up to 6V
- 1.5V to 6V Input Range
- Programmable/Synchronizable Fixed Frequency Operation up to 1.5MHz
- Programmable Automatic Burst Mode® Operation
- Current Mode Control with Programmable Soft-Start Period and Peak Current Limit
- 0.2Ω N-Channel and 0.3Ω P-Channel Switches
- Ultralow Quiescent Currents: 12µA Sleep, <1µA in Shutdown
- 12-Pin 4mm × 3mm Thermally Enhanced DFN Package
Product Details
The LTC3458L is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458L is rated for up to 6V output and includes a 0.2Ω N-channel MOSFET switch and a 0.3Ω P-channel MOSFET synchronous rectifier. The LTC3458L is well suited for battery powered applications and includes programmable output voltage, switching frequency and loop compensation. The oscillator frequency can be set up to 1.5MHz or synchronized to an external clock.
Quiescent current is only 12µA during Burst Mode operation maximizing battery life in portable applications. The Burst Mode current threshold, peak current limit, and softstart are externally programmable. Other features include <1µA shutdown current, antiringing control, and thermal limit. The LTC3458L is available in a low profile (0.75mm), 4mm × 3mm 12-pin DFN package.
Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466
| Vout Range | Switch Current | |
| LTC3458 | 2.0V to 7.5V | 1.4A |
| LTC3458L | 2.0V to 6.0V | 1.7A |
Applications
- Point-of-Load Regulators
- USB VBUS Power
- Portable GPS
- MP3 Players
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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R419 Reliability Data3/22/2018PDF27 K
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DC878A - Demo Manual9/24/2009PDF503K
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:
LTC3458
LTC3458L
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.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3458LEDE#PBF | Material Declaration | Reliability Data | 12-Lead DFN (4mm x 3mm w/ EP) | |
| LTC3458LEDE#TRPBF | Material Declaration | Reliability Data | 12-Lead DFN (4mm x 3mm w/ EP) | |
| Wafer Fabrication Data | R419 Reliability Data |
Support & Discussions
LTC3458L Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
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.