Features and Benefits
- 1.5A, 36V Internal Switch
- 1.2MHz Switching Frequency
- Integrated Soft-Start Function
- Output Voltage Up to 34V
- Low VCESAT Switch: 300mV at 1.5A (Typ)
- 8V at 430mA from a 3.3V Input
- Small 8-Lead MSOP Package
The LT1946 is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 8V at 430mA from a 3.3V input, the LT1946 is ideal for large TFT-LCD panel power supplies. The LT1946 switches at 1.2MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop compensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing optimized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during start-up.
The 8-lead MSOP package and high switching frequency ensure a low profile overall solution less than 1.2mm high.
- TFT-LCD Bias Supplies
- GPS Receivers
- DSL Modems
- Local Power Supplies
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)
DC459A Demo Board for:
LT1946 1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
LT1946A 2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
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:
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.