MB39C015 2 ch DC/DC Converter IC with PFM/PWM Synchronous Rectification Description The MB39C015 is a current mode type 2-channel DC/DC converter IC built-in voltage detection, synchronous rectifier, and down conversion support. The device is integrated with a switching FET, oscillator, error amplifier, PWM control circuit, reference voltage source, and voltage detection circuit. External inductor and decoupling capacitor are needed only for the external component. As combining with external parts enables a DC/DC converter with a compact and high load response characteristic, this is suitable as the built-in power supply for such as mobile phone/PDA, DVDs, and HDDs. Features High efficiency : 96% (Max) Output current (DC/DC) : 800 mA/ch (Max) Input voltage range : 2.5 V to 5.5 V Operating frequency : 2.0 MHz (Typ) No flyback diode needed Low dropout operation : For 100% on duty Built-in high-precision reference voltage generator : 1.30 V 2% Consumption current in shutdown mode : 1 A or less Built-in switching FET : P-ch MOS 0.3 (Typ) N-ch MOS 0.2 (Typ) High speed for input and load transient response in the current mode Over temperature protection Packaged in a compact package : QFN-24 Applications Flash ROMs MP3 players Electronic dictionary devices Surveillance cameras Portable GPS navigators DVD drives IP phones Network hubs Mobile phones etc. Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 002-08364 Rev. *B Revised February 17, 2017 MB39C015 Contents Description ............................................................................. 1 10.2 Output Voltage Setting ......................................... 16 Features .................................................................................. 1 10.3 About Conversion Efficiency ................................. 16 Applications ........................................................................... 1 10.4 Power Dissipation and Heat Considerations ......... 17 Contents ................................................................................. 2 10.5 XPOR Threshold Voltage Setting VPORH, VPORL ....................................................................... 18 1. Pin Assignment ................................................................ 3 10.6 Transient Response .............................................. 19 2. Pin Descriptions ............................................................... 4 10.7 Board Layout, Design Example ............................. 20 3. I/O Pin Equivalent Circuit Diagram ................................. 5 11. Example Of Standard Operation Characteristics ...... 21 4. Block Diagram .................................................................. 6 12. Application Circuit Examples ...................................... 29 5. Function of Each Block .................................................... 8 13. Application Circuit Examples ...................................... 30 6. Absolute Maximum Ratings .......................................... 10 14. Usage Precautions ....................................................... 32 7. Recommended Operating Conditions ..........................11 15. Ordering Information .................................................... 32 8. Electrical Characteristics ............................................... 12 16. RoHS Compliance Information .................................... 32 9. Test Circuit For Measuring Typical Operating 17. Package Dimension ...................................................... 33 Characteristics ................................................................. 14 Document History ................................................................ 34 10. Application Notes ......................................................... 15 Sales, Solutions, and Legal Information ...........................35 10.1 Selection of Components ...................................... 15 Document Number: 002-08364 Rev. *B Page 2 of 35