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Related Links:

Datasheets:
A8483: 1.2 MHz Step-up Converter for Display Bias Supply (PDF)

Selection Guides:
Power Management ICs,

Power Management ICs: Display Power and Backlight,

Power Management ICs: Switching Regulators

when this product is updated

Technical Publications:
Low-Cost Single-Inductor Triple-Output TFT LCD Supply (PDF)

Press Releases:
A8483: Allegro MicroSystems, Inc. Introduces Simple Five-Pin 1.2 MHz Step-Up Converter,

Allegro MicroSystems, Inc. to Exhibit at Portable Design China Power Management Conference

Product Evaluation Kits:
A8483 Product Evaluation Kit

A8483
1.2 MHz Step-up Converter for Display Bias Supply

Features

• Output voltage up to 35 V
• 2.5 to 10 V input
• 0.9 to 18 V input with separate bias supply
• Delivers 15 V at 15 mA with 2.7 V input
• Constant 1.2 MHz switching frequency provides low noise
• 350 mA switch current limit
• 1 µA shutdown current
• Low-noise PWM/analog dimming

Applications

• OLED bias supply / WLED backlight
• Portable battery-powered equipment
• Cellular phones
• PDAs (Personal Digital Assistant)
• Camcorders, personal stereos, MP3 players, cameras
• Mobile GPS systems

Description

The A8483 is a current mode step-up dc-to-dc converter, available in a 5-pin 3 mm × 3 mm thermally enhanced MLP/TDFN lead (Pb) free package. Smaller external components and integrated 36 V switch reduce component count and footprint for a variety of applications.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A8483EEK-T	5-lead MLP	Yes	view data	-40 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.
A8483EEKTR-T	5-lead MLP	Yes	view data	-40 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until August 1, 2008. Contact your sales rep or purchase from distributor.

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.