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MAX8795A

Maxim Integrated Products
Part Number MAX8795A
Manufacturer Maxim Integrated Products
Description TFT-LCD DC-DC Converter
Published Oct 19, 2009
Detailed Description 19-0793; Rev 1; 6/07 KIT ATION EVALU E L B AVAILA TFT-LCD DC-DC Converter with Operational Amplifiers General Descript...
Datasheet PDF File MAX8795A PDF File

MAX8795A
MAX8795A

Overview
19-0793; Rev 1; 6/07 KIT ATION EVALU E L B AVAILA TFT-LCD DC-DC Converter with Operational Amplifiers General Description Features o 2.
5V to 5.
5V Input Supply Range o 1.
2MHz Current-Mode Step-Up Regulator Fast Transient Response to Pulsed Load High-Accuracy Output Voltage (1%) Built-In 20V, 3A, 0.
16Ω n-Channel MOSFET High Efficiency (85%) o Linear-Regulator Controllers for VGON and VGOFF o High-Performance Operational Amplifiers ±130mA Output Short-Circuit Current 45V/µs Slew Rate 20MHz, -3dB Bandwidth Rail-to-Rail Inputs/Outputs o Logic-Controlled, High-Voltage Switch with Adjustable Delay o Timer-Delay Fault Latch for All Regulator Outputs o Thermal-Overload Protection o 0.
6mA Quiescent Current MAX8795A The MAX8795A includes a high-performance step-up regulator, two linear-regulator controllers, and five highcurrent operational amplifiers for active-matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs).
Also included is a logic-controlled, high-voltage switch with adjustable delay.
The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs.
The converter is a high-frequency (1.
2MHz) current-mode regulator with an integrated 20V n-channel MOSFET that allows the use of ultra-small inductors and ceramic capacitors.
It provides fast transient response to pulsed loads while achieving efficiencies over 85%.
The gate-on and gate-off linear-regulator controllers provide regulated TFT gate-on and gate-off supplies using external charge pumps attached to the switching node.
The MAX8795A includes five high-performance operational amplifiers.
These amplifiers are designed to drive the LCD backplane (VCOM) and/or the gammacorrection divider string.
The device features high output current (±130mA), fast slew rate (45V/µs), wide bandwidth (20MHz), and rail-to-rail inputs and outputs.
The MAX8795A is available in a lead-free, 32-pin, thin QFN package with a maximum thickness of 0.
8mm for ultra-thin LCD panels, as well as in ...


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