Features and Benefits
- High Efficiency: Up to 93%
- Inrush Current Limiting and Output Disconnect
- Programmable Output Voltages up to 7.5V
- 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
- 700mA at 7V from 5V Input
- 0.3Ω N-Channel and 0.4Ω P-Channel 1.4A Switches at 5VOUT
- Ultralow Quiescent Currents: 15µA Sleep, <1µA in Shutdown
- 3mm × 4mm Thermally Enhanced DFN Package
The LTC3458 is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458 is rated for a 7.5V output and includes a 0.3Ω N-channel MOSFET switch and a 0.4Ω P-channel MOSFET synchronous rectifier. The LTC3458 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 15µA 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 LTC3458 is available in a low profile (0.75mm), 3mm × 4mm 12-pin DFN package.
|Vout Range||Switch Current|
|LTC3458||2.0V to 7.5V||1.4A|
|LTC3458L||2.0V to 6.0V||1.7A|
- Point-of-Load Regulators
- USB VBUS Power
- LCD Bias
- OLED Displays
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 728 is a 1MHz Synchronous Step- Up DC/DC Converter featuring the LTC®3458EDE. The demo circuit demonstrates a DC/DC boost converter, with a 1.5A switch, providing 7V at 200mA to 800mA depending on input voltage, which ranges from 2V to 6V.
The circuit demonstrates the advantages of output disconnect and inrush current limiting.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.