Features and Benefits
- Two Complete Step-Down Switching Power Supplies
- Low Noise Silent Switcher® Architecture
- CISPR25 Class 5 Compliant
- Wide Input Voltage Range: 3V to 40V
- Wide Output Voltage Range: 0.8V to 10V
- 1.4A Continuous Output Current per Channel at 24VIN, 3.3VOUT, TA = 85°C
- Multiphase Parallel Operation to Increase Current
- Selectable Switching Frequency: 300kHz to 3MHz
- Compact Package (6.25mm × 6.25mm × 2.22mm) Surface Mount BGA
The LTM8078 is 40VIN, dual 1.4A/single 2.8A step-down Silent Switcher μModule® regulator. The Silent Switcher architecture minimizes EMI while delivering high efficiency at frequencies up to 3MHz. Included in the package are the controllers, power switches, inductors, and support components. Operating over a wide input voltage range, the LTM8078 supports output voltages from 0.8V to 10V, and a switching frequency range of 300kHz to 3MHz, each set by a single resistor. Only the bulk input and output filter capacitors are needed to finish the design. The LTM8078 product video is available on website.
The LTM8078 is packaged in a compact (6.25mm × 6.25mm × 2.22mm) over-molded Ball Grid Array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8078 is available with SnPb (BGA) or RoHS compliant.
- Automated Test Equipment
- Distributed Supply Regulation
- Industrial Supplies
- Medical Equipment
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)
Features & Benefits
Demonstration circuit 2777A is a dual step-down DC/DC switching converter featuring the LTM8078 μModule regulator. The demo board is designed to deliver dual 5V/1.4A and 3.3V/1.4A outputs from a 7V to 40V input. The Silent Switcher® architecture minimizes EMI while achieving high efficiency at frequencies up to 3MHz. The modes of operation (Burst Mode® operation or discontinuous mode/SYNC) are jumper selectable. Burst Mode operation improves efficiency at light loads.
The LTM8078 is a fixed frequency PWM regulator with current mode control scheme. The switching frequency is set by an appropriate resistor (R11) from the RT pin to ground. The RUN pin (RUN terminal) can be used to set the LTM8078 in micropower shutdown mode. Output tracking and soft-start pins (TRSS1/TRSS2) allow user control of output voltage ramp rate during start-up. The power good output of each channel (PG1 or PG2 terminal) will be low when that channel’s output voltage is outside of the ±7.5% regulation window.
The LTM8078 data sheet gives a complete description of the operation and application information. The data sheet must be read in conjunction with this demo manual.
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.
Design tools for the following parts are available in LTpowerCAD:
Technical Articles (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.