The EL7640, EL7641, and EL7642 integrate a high performance boost regulator with 2 LDO controllers for Von and VoFF, a Von-slice circuit with adjustable delay and either one (EL7640), three (EL7641), or five amplifiers(EL7642) for Vcom and Vgamma applications.
The boost converter in the EL7640, EL7641, and EL7642 is a current mode PWM type integrating an 18V N-channel MOSFET. Operating at 1.2MHz, this boost can operate ineither P-mode for superior transient response, or in PI-modefor tighter output regulation.
Using external low-cost transistors, the LDO controllers provide tight regulation for Von, VoFF, as well as providing start-up sequence control and fault protection.
The amplifiers are ideal for Vcom and Vgmma applications, with 150mA peak output current drive, 12MHzbandwidth, and 12V/us slew rate. All inputs and outputs are rail-to-rail.
Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free packages, the EL7640, EL7641, and EL7642 are specified for operation over the -40°C to +85°C temperature range.
Features
--Current mode boost regulator
**Fast transient response
**1%% accurate output voltage
**18V/3A integrated FET
**>90% efficiency
--2.6V to 5.5V ViN supply
--2 LDO controllers for VoN and VOFF
** 2% output regulation
**VoN-slice circuit
--High speed amplifiers
**150mA short-circuit output current
**12V/us slew rate
**12MHz -3dB bandwidth
**Rail-to-rail inputs and outputs
--Built-in power sequencing
--Internal soft-start
--Multiple overload protection
--Thermal shutdown
--32 Ld 5x5 thin QFN package
--Pb-Free plus anneal available (RoHS compliant)
Applications
--TFT-LCD panels
--LCD monitors
--Notebooks
--LCD-TVs
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