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Product Detailed Parameters
- Description：IC REG CONV TFT LCD 3OUT 20LFCSP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Applications：Converter, TFT LCD
- Voltage - Input：2.7V ~ 4.2V
- Number of Outputs：3
- Voltage - Output：-15V, 5V, 15V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-VFQFN Exposed Pad, CSP
- Supplier Device Package：20-LFCSP-VQ (4x3.75)
- Grade：-
- Qualification：-
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Overview
The ADM8839ACPZ-REEL is a charge pump regulator designed for color TFT LCD applications. It generates three output voltages: -15V, +15V, and +20V from a single 2.7V to 4.2V input supply. The device operates with a switching frequency of 140kHz and utilizes CMOS technology. It is housed in a 20-lead LFCSP package. The component is classified as obsolete and no longer manufactured by Analog Devices.
Feature Summary
- Generates negative and positive high-voltage rails required for TFT LCD biasing
- Operates from a low single-supply voltage range suitable for portable devices
- Integrates switched-capacitor regulation for compact system design
Applications
- Color Thin Film Transistor Liquid Crystal Display (TFT LCD) driver circuits
- Portable electronic devices requiring LCD bias generation
- Battery-powered systems needing voltage inversion and multiplication
Procurement Notes
This component is officially listed as obsolete and no longer manufactured by Analog Devices. Verification of availability should focus on surplus distributors or alternative replacement parts. Ensure compatibility with existing designs before sourcing from secondary markets.
Selection Notes
Select this part only if the specific output voltages of -15V, +15V, and +20V match the TFT LCD requirements. Due to its obsolete status, consider redesigning with current Analog Devices alternatives that offer similar charge pump functionality and pin compatibility.
Part Context
The ADM8839 belongs to Analog Devices' portfolio of power management ICs specifically tailored for display technologies. It addresses the need for efficient voltage conversion in space-constrained mobile electronics. As an older generation product, it represents earlier CMOS charge pump architectures used in widespread consumer electronics.
Replacement Considerations
Analog Devices has discontinued this part. Users should consult official substitution guides for modern equivalents. Verify electrical specifications and pinout compatibility when transitioning to new components.
