Features and Benefits
- SEPIC or Inverting Topology
- Wide Input Voltage Range: 2.8V to 18V
- Up to 700mA Output Current at VIN = 12V, VOUT = 2.5V or –2.5V
- Up to 375mA Output Current at VIN = 12V, VOUT =15V or –15V
- 2.5V to 15V or –2.5V to –15V Output Voltage
- Selectable Switching Frequency: 200kHz to 2MHz
- Programmable Soft-Start
- User Configurable Undervoltage Lockout
- 6.25mm × 11.25mm × 4.92mm BGA Package
The LTM8045 is a μModule® (power module) DC/DC converter that can be configured as a SEPIC or inverting converter by simply grounding the appropriate output rail. In a SEPIC configuration the regulated output voltage can be above, below or equal to the input voltage. The LTM8045 includes power devices, inductors, control circuitry and passive components. All that is needed to complete the design are input and output capacitors, and small resistors to set the output voltage and switching frequency. Other components may be used to control the soft-start and undervoltage lockout.
The LTM8045 is packaged in a compact (6.25mm × 11.25mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8045 is available with SnPb (BGA) or RoHS compliant terminal finish.
- Battery Powered Regulator
- Local Negative Voltage Regulator
- Low Noise Amplifier Power
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)
Demo circuit DC1533A features the LTM8045, an inverting/SEPIC μModule converter delivering up to 700mA of output current. DC1533A is configured as an inverting converter, but can be easily changed to a SEPIC configuration for non-inverting step-up or step-down functionality. The user adjustable features of the LTM8045 such as output voltage, switching frequency, soft-start period and undervoltage lockout can be changed on DC1533A simply by modifying or installing the appropriate resistors or capacitor.
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:
Reference Designs (1)
Product Selector Card (3)
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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.