LTC3450: Triple Output Power Supply for Small TFT-LCD Displays Data Sheet8/23/2007190K
Features and Benefits
- Generates Three Voltages:
- 5.1V at 10mA
- 5V, -10V, or -15V at 500µA
- 10V or 15V at 500µA
- Better than 90% Efficiency
- Low Output Ripple: Less than 5mVP-P
- Complete 1mm Component Profile Solution
- Controlled Power-Up Sequence: AVDD/VGL/VGH
- All Outputs Disconnected and Actively Discharged in Shutdown
- Low Noise Fixed Frequency Operation
- Frequency Reduction Input for High Efficiency in Blank Mode
- Ultralow Quiescent Current: 75µA (Typ) in Scan Mode
- Available in a 3mm × 3mm 16-Pin QFN Package
The LTC3450 is a complete power converter solution for small thin film transistor (TFT) liquid crystal display (LCD) panels. The device operates from a single Lithium-Ion cell, 2- to 3-cell alkaline input or any voltage source between 1.5V and 4.6V.
The synchronous boost converter generates a low noise, high efficiency 5.1V, 10mA supply. Internal charge pumps are used to generate 10V, 15V, and -5V, -10V or -15V. Output sequencing is controlled internally to insure proper initialization of the LCD panel.
A master shutdown input reduces quiescent current to <2µA and quickly discharges each output for rapid turn off of the LCD panel. The LTC3450 is offered in a low profile (0.75mm), 3mm × 3mm 16-pin QFN package, minimizing the solution profile and footprint.
- Cellular Handsets with Color Display
- Handheld Instruments
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)
DC553A: Demo Board for the LTC3450 Triple Output Power Supply for Small TFT-LCD Displays.
Documentation & Resources
R419 Reliability Data3/22/201827 K
DC553A - Demo Manual9/24/2009138K
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.
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