MP1531 Low Power, Triple Output Step-Up Plus Charge Pump for TFT Bias The Future of Analog IC Technology DESCRIPTION FEATURES The MP1531 is a triple output step-up converter 2.7V to 5.5V Operating Input Range with charge-pumps to make a complete DC/DC 500mA Switch Current Limit converter to power a TFT LCD panel from a 3 Outputs in a Single Package 2.7V to 5.5V supply. Step-Up Converter up to 22V Positive 10mA Linear Regulator The MP1531 includes a 250kHz fixed frequency Negative 10mA Linear Regulator step-up converter and a positive and negative 250m Internal Power MOSFET Switch linear regulator. The linear regulators are powered via charge-pumps driven by the step-up 95% Efficiency converter switch node. 1 A Shutdown Mode Fixed 250kHz Frequency A single on/off control enables all 3 outputs. Positive Regulator up to 38V The outputs are internally sequenced at Negative Regulator down to -20V power-on for ease of use. An internal soft-start Internal Power-On Sequencing prevents overloading the input source at startup. Adjustable Soft-Start/Fault Timer Cycle-by-cycle current limit reduces component stress. Thermal Shutdown Cycle-By-Cycle Over Current Protection The MP1531 is available in both a tiny 16-pin Under Voltage Lockout QFN package (3 x 3mm) and a 16-pin TSSOP Ready Flag package. 16-Pin TSSOP and QFN (3x3mm) Packages APPLICATIONS TFT LCD Displays Portable DVD Players Tablet PCs Car Navigation Displays For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION V IN Efficiency vs 2.7V-4.2V Load Current 100 V = 4.2V IN 90 V = 3.3V CT RDY IN IN OFF ON EN V MAIN 80 SW COMP 5V FB1 70 TO SW 60 IN2 50 MP1531 IN3 40 V GL GL -4V FB2 V V = 5V 30 MAIN GH GH 12V FB3 20 REF 0 100 200 300 400 500 600 GND PGND LOAD CURRENT (mA) MP1531 Rev. 1.32 www.MonolithicPower.com 1 9/16/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. EFFICIENCY (%)MP1531 LOW POWER, TRIPLE OUTPUT STEP-UP PLUS CHARGE PUMP FOR TFT BIAS ORDERING INFORMATION Part Number Package Top Marking Free Air Temperature (T ) A QFN16 (3x3mm) MP1531DQ* B6 -40 C to +85C TSSOP16 MP1531DM** M1531DM -40 C to +85C * Notes:MP1531DQ is not recommended for new design. * For Tape & Reel, add suffix Z (g. MP1531DQZ). For RoHS compliant packaging, add suffix LF (e.g. MP1531DQLFZ) * *For Tape & Reel, add suffix Z (g. MP1531DMZ). For RoHS compliant packaging, add suffix LF (e.g. MP1531DMLFZ) PACKAGE REFERENCE TOP VIEW PIN 1 ID PGND IN3 GH IN2 TOP VIEW 16 15 14 13 RDY 1 16 CT SW 1 12 GL FB1 2 15 SW CT 2 11 EN COMP 3 14 PGND IN 4 13 IN3 RDY 3 10 FB3 GND 5 12 GH REF 6 11 IN2 FB1 4 9 FB2 FB2 7 10 GL 5 6 7 8 FB3 8 9 EN COMP IN GND REF EXPOSED PAD CONNECT TO PIN 13 QFN16 TSSOP16 (1) IN3, GH Voltage .................................. 0V to 38V ABSOLUTE MAXIMUM RATINGS Maximum Junction Temp. (T ) ................ +125C J IN Supply Voltage .......................... 0.3V to +6V (3) SW Voltage .................................. 0.3V to +25V Thermal Resistance JA JC IN2, GL Voltage ........................... +0.3V to 25V QFN16 ..................................... 60 ..... 120 .. C/W IN3, GH Voltage ........................... 0.3V to +40V TSSOP16 ................................ 90 ...... 30 ... C/W IN2 to IN3 Voltage ........................ 0.3V to +60V Notes: All Other Pins ................................. 0.3V to +6V 1) Exceeding these ratings may damage the device. (2) Continuous Power Dissipation (T = +25C) A 2) The maximum allowable power dissipation is a function of the maximum junction temperature T (MAX), the junction-to- J QFN16 (3 x 3mm)....2.1W ambient thermal resistance , and the ambient temperature JA TSSOP16 ....1.4W T . The maximum allowable continuous power dissipation at A Junction Temperature ............................... 125C any ambient temperature is calculated by P (MAX) = (T D J (MAX)-T )/ . Exceeding the maximum allowable power A JA Lead Temperature .................................... 260C dissipation will cause excessive die temperature, and the Storage Temperature .............. 65C to +150C regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent (2) Recommended Operating Conditions damage. 3) The device is not guaranteed to function outside of its Input Voltage ................................... 2.7V to 5.5V operating conditions. Main Output Voltage ........................... V to 22V IN 4) Measured on approximately 1 square of 1 oz copper. IN2, GL Voltage ................................ 0V to 20V MP1531 Rev. 1.32 www.MonolithicPower.com 2 9/16/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.