MP1531 Datasheet | Monolithic Power Systems

DESCRIPTION The MP1531 is a triple output step-up converter with charge-pumps to make a plete DC/DC converter to power a TFT LCD panel from a 2.7V to 5.5V supply. The MP1531 includes a 250k Hz 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. A single on/off control enables all 3 outputs. The outputs are internally sequenced at power-on for ease of use. An internal soft-start prevents overloading the input source at startup. Cycle-by-cycle current limit reduces ponent stress. The MP1531 is available in both a tiny 16-pin QFN package (3 x 3mm) and a 16-pin TSSOP package. TYPICAL APPLICATION VIN 2.7V-4.2V OFF ON TO SW VGL -4V EN CT P IN SW FB1 IN2 IN3 FB2 FB3 PGND VMAIN 5V VGH 12V FEATURES - 2.7V to 5.5V Operating Input Range - 500m A Switch Current Limit - 3 Outputs in a Single Package - Step-Up Converter up to 22V - Positive 10m A Linear Regulator - Negative 10m A Linear Regulator - 250mΩ Internal Power MOSFET Switch - 95% Efficiency - 1μA Shutdown Mode - Fixed 250k Hz 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...