Features and Benefits
- Silent Switcher® Architecture
- Ultralow EMI Emissions
- Optional Spread Spectrum Frequency Modulation
- Integrated 40V, 2.5A Power Switches
- Wide Input/Output Voltage Range: 2.7V to 40V
- Low VIN Pin Quiescent Current:
- 0.3μA in Shutdown
- 4μA in Burst Mode® Operation
- 15μA in PassThru™ Operation
- 100% Duty Cycle Capability for Synchronous MOSFET
- Adjustable and Synchronizable: 300kHz to 3MHz
- Pulse-Skipping or Burst Mode Operation at Light Load
- Output Soft-Start and Power Good Monitor
- Internal Compensation
- Accurate 1V Enable Pin Threshold
- Small 16-Lead (3mm × 3mm) LQFN Package
- AEC-Q100 Qualified for Automotive Applications
The LT8336 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation to minimize EMI emissions while delivering high efficiencies at high switching frequencies.
The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty cycle capability for the synchronous MOSFET in PassThru operation (VIN ≥ VOUT), make the LT8336 ideally suited for general purpose step-up and automotive preboost applications.
The LT8336 integrates 40V, 2.5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. Pulse-skipping or Burst Mode operation can be selected, with or without spread-spectrum frequency modulation, to optimize efficiency and EMI performance.
The LT8336 features output soft-start, an output power good flag and output overvoltage lockout.
- Automotive and Industrial Power Supplies
- General Purpose Step-Up
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)
Demonstration circuit 2505A is a low IQ, Silent Switcher® synchronous boost converter featuring the LT8336. DC2505A is designed to convert an 8V to 20V source to 24V output, with up to 1.5A load current, depending on the input voltage. DC2505A operates at 2MHz switching frequency.
The DC2505A contains a selectable jumper, JP1, to aid in the selection of the desired SYNC pin mode of operation. The default setting is pulse-skipping mode of operation.
The DC2505A has an EMI filter installed. The EMI filter can be included by connecting the source to the VEMI terminal and the output to the VOUT2 terminal.
The Performance Summary section details the ratings of the DC2505A at room temperature.
The LT8336 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for DC2505A.
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:
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
LTpowerCAD Project Files
Design tools for the following parts are available in LTpowerCAD:
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
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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.