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2022-09-24 22:18:33
LTC3450 Triple Output Power Supply for Small TFT-LCD Displays
Three voltages can be generated:
5.1V/10μA
–5V, –10V or –15V/500μA
10V or 15V/500mA
Efficiency higher than 90%_Low output ripple: less than 5mVP-P
A complete solution with a component height of only 1mm
Controlled Power-Up Sequencing: AVDD/VGL/VGH
All outputs are disconnected and automatically discharged in shutdown
Low Noise Fixed Frequency Operation
Reduced frequency input for high efficiency in blanking mode
Ultra-low quiescent current: 75µA (typ) in scan mode
Available in 3mm×3mm 16-pin QFN package
Product Details
The LTC?3450 is a complete power converter solution for small thin film transistor (TFT) liquid crystal display (LCD) panels. The device operates from a single-cell Li-Ion battery, two- to three-cell alkaline battery input, or any voltage source between 1.5V and 4.6V.
This synchronous boost converter generates a low noise, high efficiency 5.1V, 10mA supply. An internal charge pump is used to generate 10V, 15V and –5V, –10V or –15V. Output sequencing is internally controlled to ensure proper initialization of the LCD screen.
A master shutdown input reduces quiescent current to less than 2µA and quickly discharges each output to quickly turn off the LCD screen. The LTC3450 is packaged in a low profile (0.8mm maximum height) 3mm x 3mm 16-pin QFN package, which greatly reduces solution height and footprint.
application
Cellular Handset with Color Display
Handheld Meter
PDA