New Content (1)
Technical ArticlesCascaded and Hybrid Concepts for Voltage Conversion
Features and Benefits
- Complete Switch Mode Power Supply
- Wide Input Voltage Range: 4.5V to 60V
- (7.5V Minimum Voltage to Start)
- Wide Output Voltage Range: 2.5V to 24V (See Table 2)
- 4A Output Current
- Programmable Soft-Start
- 9μA Shutdown Supply Current
- Selectable Switching Frequency Current Mode Control
- Up to 95% Efficiency
- SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
- Surface Mount LGA (15mm × 15mm × 4.32mm) and (15mm × 15mm × 4.92mm) BGA Packages
The LTM8027 is a complete 4A, DC/DC step-down power supply. Included in the package are the switching controller, power switches, inductor and all support components. Operating over an input voltage range of 4.5V to 60V (7.5V minimum voltage to start), the LTM8027 supports output voltages up to 24V, and a switching frequency range of 100kHz to 500kHz, each set by a single resistor. Only the bulk input and output filter capacitors are needed to finish the design.
The low profile package (4.32mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. A built-in soft-start timer is adjustable with a small capacitor.
The LTM8027 is packaged in a compact (15mm × 15mm × 4.32mm) over-molded land grid array (LGA) and (15mm × 15mm × 4.92mm) BGA package suitable for automated assembly by standard surface mount equipment. The LTM8027 is available with SnPb (BGA) or RoHS compliant terminal finish.
- 12V and 42V Automotive and Heavy Equipment
- 48V Telecom Power Supplies
- Avionics and Industrial Control Systems
- Distributed Power Converters
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 (2)
Demonstration circuit 2125 is a small, highly-integrated, non-isolated PoE Powered Device (PD) solution. It features a PD Interface Controller (LT4275), which interfaces with a PoE Power Sourcing Equipment (PSE), an ideal diode bridge controller (LT4321), which minimizes bridge losses, and a DC/DC μModule® regulator (LTM8027).
Demonstration circuit 1307B features the LTM8027 configured to deliver 12V/4A from a 16V to 60V input. The wide input range of the LTM8027 allows a variety of input sources such as automotive batteries, wall adaptors and industrial supplies. The LTM8027 is a step down converter, so a minimum amount of headroom is required to keep the output in regulation. A soft-start feature controls the output voltage slew rate at start-up, reducing current surges and voltage overshoots.
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.
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:
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.
Design tools for the following parts are available in LTpowerCAD:
Technical Articles (1)
Press Releases (1)
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.