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