EL7581: 3-Channel DC/DC Converter

The EL7581 is a 3-channel DC-DC converter IC designed primarily for use in TFT-LCD applications. It features a PWM boost converter with 2.7V to 14V input capability and 5V to 17V output, which powers the column drivers and provides up to 720mA @12V, 570mA @ 15V from 5V input. A pair of charge pump control circuits provide regulated outputs of VON and VOFF supplies at 8V to 40V and -5V to -40V, respectively, each at up to 60mA.

Key Features
  • TFT-LCD display supply
    • Boost regulator
    • VON charge pump
    • VOFF charge pump
  • 2.7V to 14V VIN supply
  • 5V < VBOOST < 17V
  • 5V < VON < 40V
  • -40V < VOFF < 0V
  • VBOOST = 12V @ 720mA
  • VBOOST = 15V @ 570mA
  • High frequency, small inductor DC-DC boost circuit
  • Over 90% efficient DC-DC boost converter capability
  • Adjustable frequency
  • Adjustable soft-start
  • Adjustable outputs
  • Small parts count
Applications
  • TFT-LCD panels
  • PDAs
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1108: Applying Power MOSFET DriversPDF13 Nov 2014112 KB
AN1101: Designing a High Efficiency DC-DC Converter with the EL75xxPDF13 Nov 2014292 KB
AN1096: EL75XX Thermal Design ConsiderationsPDF13 Nov 2014191 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
EL7581 DatasheetPDF01 Sep 2015542 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
EL7581IRE20 Ld TSSOP0.072203240
EL7581IRE-T1320 Ld TSSOP T+R0.072203240
EL7581IRE-T720 Ld TSSOP T+R0.072203240
EL7581IREZ20 Ld TSSOP0.072203260RoHS
EL7581IREZ-T1320 Ld TSSOP T+R0.072203260RoHS
EL7581IREZ-T720 Ld TSSOP T+R0.072203260RoHS
EL7581IRE-EVALN/A
Datasheet
EL7581 Datasheet 01 Sep 2015
Other
AN1096: EL75XX Thermal Design Considerations 13 Nov 2014
AN1101: Designing a High Efficiency DC-DC Converter with the EL75xx 13 Nov 2014
AN1108: Applying Power MOSFET Drivers 13 Nov 2014
EL7581
20 Ld TSSOP T+R EL7583