ADM8839

Charge Pump Regulator for Color TFT Panel
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Product Details

The ADM8839 is a charge pump regulator, used for colour TFT (Thin Film Transistor) LCD’s (Liquid Crystal Displays). The device can be used to generate 3 output voltages (+5 V ±2%, +15 V, -15 V) from a single 2.7V - 4.2V (li-ion) input supply, using charge pump technology. These voltages are then used to provide supplies for the LCD controller (5 V ±2%), and the gate drives for the transistors in the panel (+15 V and -15 V). Only a few external capacitors are needed for the charge pumps. An efficient low dropout voltage regulator also ensures that the power efficiency is high and provides a low ripple 5 V output. This LDO can be shutdown and an external LDO used to regulate the 5 V doubler output and to drive the input to the charge pump section which generates the +15 V and -15 V outputs if so required by the user.

The ADM8839 has a power save shutdown feature. The 5 V output consumes the most power, so Power Efficiency is also maximised on this output with an oscillator enabling scheme (Green Idle™). This effectively senses the load current that is flowing and turns on the charge pump only when charge needs to be delivered to the 5 V pump doubler output.

The ADM8839 is fabricated using CMOS technology for minimal power consumption. The part is packaged in a 20- lead LFCSP (Lead Frame Chip Scale Package) with a tiny 4mm x 4mm footprint.

Product Lifecycle

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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.

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Product Details

The ADM8839 is a Charge Pump Regulator for Color TFT Panel. This page contains evaluation board documentation and ordering information for evaluating this product.

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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.

ADM8839 Material Declaration
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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.


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