DESCRIPTION

The MP1531 is a triple output step-up converter with charge-pumps to make a complete DC/DC converter to power a TFT LCD panel from a 2.7V to 5.5V supply.

The MP1531 includes a 250KHz fixed frequency step-up converter and a positive and negative linear regulator. The linear regulators are powered via charge-pumps driven by the step-up converter switch node.

FEATURES

• 2.7V to 5.5V Operating Input Range

• 500mA Switch Current Limit

• 3 Outputs in a Single Package

• Step-Up Converter up to 22V

• Positive 10mA Linear Regulator

• Negative 10mA Linear Regulator

• 250mΩ Internal Power MOSFET Switch

• 95 Efficiency

• 1µA Shutdown Mode

• Fixed 250KHz Frequency

• Positive Regulator up to 38V

• Negative Regulator down to -20V

• Internal Power-On Sequencing

• Adjustable Soft-Start/Fault Timer

• Thermal Shutdown

• Cycle-By-Cycle Over Current Protection

• Under Voltage Lockout

• Ready Flag

• 16-Pin TSSOP and QFN (3mm x 3mm) Packages

APPLICATIONS

• TFT LCD Displays

• Portable DVD Players

• Tablet PCs

• Car Navigation Displays