Features and Benefits
- Output Current
- 100mA (LT1054)
- 125mA (LT1054L)
- Reference and Error Amplifier for Regulation
- Low Loss: 1.1V at 100mA
- Operating Range
- 3.5V to 15V (LT1054)
- 3.5V to 7V (LT1054L)
- External Shutdown
- External Oscillator Synchronization
- Can Be Paralleled
- Pin Compatible with the LTC1044/ICL7660
- Available in SW16 and SO-8 Packages
The LT1054 is a monolithic, bipolar, switched-capacitor voltage converter and regulator. The LT1054 provides higher output current than previously available converters with significantly lower voltage losses. An adaptive switch driver scheme optimizes efficiency over a wide range of output currents. Total voltage loss at 100mA output current is typically 1.1V. This holds true over the full supply voltage range of 3.5V to 15V. Quiescent current is typically 2.5mA.
The LT1054 also provides regulation, a feature not previously available in switched-capacitor voltage converters. By adding an external resistive divider a regulated output can be obtained. This output will be regulated against changes in both input voltage and output current. The LT1054 can also be shut down by grounding the feedback pin. Supply current in shutdown is less than 100µA.
The internal oscillator of the LT1054 runs at a nominal frequency of 25kHz. The oscillator pin can be used to adjust the switching frequency or to externally synchronize the LT1054.
The LT1054 is pin compatible with previous converters such the LTC1044/ICL7660.
- Voltage Inverter
- Voltage Regulator
- Negative Voltage Doubler
- Positive Voltage Doubler
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)
The Buck Converter Basics Active Learning lab exercise demonstrates key concepts related to buck converters, but the circuits can be difficult to assemble with parts from the ADALP2000 parts kit. The ADALM-BUCK-ARDZ board allows all of the experiments from to be performed quickly and easily without having to build and debug the circuit on a breadboard.
Features & Benefits
- Allows all of the experiments from the Buck Converter Basics lab exercise to be performed without having to build the circuit on a breadboard.
- Illustrates important concepts related to buck regulators
- Inductor Ripple Current vs. inductance
- Output ripple vs. output capacitance
- Open-loop vs. closed loop operation
- Compatible with Arduino Uno for demonstrating closed-loop operation and duty cycle vs. voltage relationships.
Application Notes (5)
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:
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.