MB39C014 1 ch DC/DC Converter IC with PFM/PWM Synchronous Rectification Description The MB39C014 is a current mode type 1-channel DC/DC converter IC built-in switching FET, synchronous rectification, and down conversion support. The device is integrated with a switching FET, oscillator, error amplifier, PWM control circuit, reference voltage source, and POWERGOOD 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 (Max) Input voltage range : 2.5 V to 5.5 V Operating frequency : 2.0/3.2 MHz (Typ) No flyback diode needed Low dropout operation : For 100% on duty Built-in high-precision reference voltage generator : 1.20 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 : SON10 Applications Flash ROMs MP3 players Electronic dictionary devices Surveillance cameras Portable GPS navigators Mobile phones etc. Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 002-08361 Rev. *C Revised June 5, 2017 MB39C014 Contents Description ............................................................................. 1 10. Application Notes ......................................................... 14 Features .................................................................................. 1 10.1 Selection of Components ...................................... 14 Applications ........................................................................... 1 10.2 Output Voltage Setting .......................................... 15 Contents ................................................................................. 2 10.3 About Conversion Efficiency ................................. 15 1. Pin Assignment ................................................................ 3 10.4 Power Dissipation and Heat Considerations ......... 16 2. Pin Descriptions ............................................................... 3 10.5 Transient Response .............................................. 16 3. I/O Pin Equivalent Circuit Diagram ................................. 4 10.6 Board Layout, Design Example ............................. 17 4. Block Diagram .................................................................. 5 10.7 Layout Example of IC SW Components ................ 17 4.1 Current Mode ............................................................ 6 10.8 Notes for Circuit Design ........................................ 17 5. Function Of Each Block ................................................... 7 11. Example Of Standard Operation Characteristics ...... 18 5.1 PWM Logic Control Circuit ........................................ 7 12. Application Circuit Examples ...................................... 27 5.2 IOUT Comparator Circuit ........................................... 7 12.1 Application Circuit Example 1 ................................ 27 5.3 Error Amp Phase Compensation Circuit ................... 7 12.2 Application Circuit Example 2 ................................ 27 5.4 VREF Circuit.............................................................. 7 12.3 Application Circuit Example Components List ....... 28 5.5 POWERGOOD Circuit ............................................... 7 13. Usage Precautions ....................................................... 29 5.6 Protection Circuit ....................................................... 8 14. Ordering Information .................................................... 29 6. Absolute Maximum Ratings ............................................ 9 15. RoHS Compliance Information .................................... 29 7. Recommended Operating Conditions ..........................10 16. Package Dimension ...................................................... 30 8. Electrical Characteristics ............................................... 11 Document History ................................................................ 31 9. Test Circuit For Measuring Typical Operating Sales, Solutions, and Legal Information ...........................32 Characteristics ................................................................. 13 Document Number: 002-08361 Rev. *C Page 2 of 32