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The EL7640A, EL7641A, and EL7642A integrate a high performance boost regulator with 2 LDO controllers for V_ON and V_OFF, a V_ON-slice circuit with adjustable delay and either one (EL7640A), three (EL7641A), or five amplifiers (EL7642A) for V_COM and V_GAMMA applications.

The boost converter in the EL7640A, EL7641A, and EL7642A is a current mode PWM type integrating an 18V NHchannel MOSFET. Operating at 1.2MHz, this boost can operate in either P-mode for superior transient response, or in PI-mode for tighter output regulation.

Using external low-cost transistors, the LDO controllers provide tight regulation for V_ON, V_OFF, as well as providing start-up sequence control and fault protection.

The amplifiers are ideal for V_COM and V_GAMMA applications, with 150mA peak output current drive, 12MHz bandwidth, and 12V/µs slew rate. All inputs and outputs are rail-to-rail.

Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free packages, the EL7640A, EL7641A, and EL7642A are specified for operation over the -40°C to +85°C temperature range.

Key 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/µs 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