FP6717SPCTR

FP6717 5V, 3.1A, 550KHz High Efficiency Low Ripple Synchronous Step-Up Converter Description Features The FP6717 is a high efficiency, fixed frequency 550KHz, current mode PWM boost DC/DC converter which could operate battery such as input voltage down to 2.5V. The converter output voltage can be adjusted to a maximum of 5.25V by an external resistor divider. Besides the converter includes a 39mΩ N-channel MOSFET switch and 42mΩ P-channel synchronous rectifier. So no external Schottky diode is required and could get better efficiency near 90%. The converter is based on a fixed frequency, current mode, pulse-width-modulation PWM controller that goes automatically into PSM mode at light load.                 High Efficiency up to 90% Low RDS(ON) Integrated Power MOSFET NMOS 39mΩ/PMOS 42mΩ Wide Input Voltage Range: 2.5V to 5.25V Fixed 550KHz Switching Frequency Low-Power Mode for Light Load Conditions ±2.0% Voltage Reference Accuracy Adjustable Current Limit PMOS Current Limit for Short Circuit Protection Low Quiescent Current Input Under Voltage Lockout Internal Compensation Function Built-In Soft Start Function Over-Temperature Protection with Auto Recovery Output Overvoltage Protection SOP-8 (Exposed Pad) Pb-Free Package When converter operation into discontinuous mode, the internal anti-ringing switch will reduce interference and radiated electromagnetic energy. Applications The FP6717 is available in a space-saving SOP-8 (Exposed Pad) package for portable application.     Pin Assignments Ordering Information SP Package (SOP-8 Exposed Pad) FP6717□□□ Portable Power Bank Wireless Equipment Handheld Instrument GPS Receiver TR: Tape/Reel 8 LX 7 9 PGND 3 6 5 4 LX VIN 1 OUT 2 FB GND EN ILIM C: Green Package Type SP: SOP-8 (Exposed Pad) Figure 1. Pin Assignment of FP6717 FP6717- 0.3-OCT-2015 1 FP6717 Typical Application Circuit L1 VIN 2.5V to 5.25V R 2.2μH C VOUT (Optional) C2 0.1μF 5V/3A C3 C4 7,8 C1 22μF 1 LX VIN OUT 22μF*3 0.1μF 2 R1 525K FP6717 5 ILIM RILIM 6 EN PGND GND FB ON R2 100K 3 4 9 OFF Figure 2. Typical Application Circuit ILIM Resistance Value (MΩ) Typical Input Limits (A) 0.5 8 1 4 2 2 4 1 8 0.5 Functional Pin Description Pin Name Pin No. VIN 1 Power Supply Input Pin. OUT 2 Output of the Synchronous Rectifier. FB 3 Voltage Feedback Input Pin. GND 4 Ground Pin. ILIM 5 Programming Input for Average Input Current. EN 6 Logic Controlled Shutdown Input. LX 7,8 PGND 9 FP6717- 0.3-OCT-2015 Pin Function Connect GND to exposed pad. Power Switching Connection. Connect LX to the inductor and output rectifier. Power Ground Pin. 2 FP6717 Block Diagram VIN LX PMOS OUT ANTI-RING EN On/Off Control NMOS ILIM GM Body-Diode Switch Anti-Reverse Comparator Isense/Current Limit Ramp Generator PFM Control OSC PWM Control Logic COMP Error Amp UVLO FB Bandgap Reference VIN GND Figure 3. Block Diagram of FP6717 FP6717- 0.3-OCT-2015 3 FP6717 Absolute Maximum Ratings (Note 1) ● Supply Voltage VIN ----------------------------------------------------------------------------------------------- -0.3V to +6V ● LX Voltage VLX ---------------------------------------------------------------------------------------------------- -0.3V to +6V ● All Other Pins Voltage ------------------------------------------------------------------------------------------- -0.3V to +6V ● Maximum Junction Temperature (TJ) ------------------------------------------------------------------------ +150°C ● Storage Temperature (TS) -------------------------------------------------------------------------------------- -65°C to +150°C ● Lead Temperature (Soldering, 10sec.) --------------------------------------------------------------------- +260°C ● Package Thermal Resistance, (θJA) SOP-8 (Exposed Pad) ------------------------------------------------------------------------------ 60°C/W ● Package Thermal Resistance, (θJC) SOP-8 (Exposed Pad) ------------------------------------------------------------------------------ 15°C/W Note 1：Stresses beyond this listed under “Absolute Maximum Ratings" may cause permanent damage to the device. Recommended Operating Conditions ● Supply Voltage VIN ----------------------------------------------------------------------------------------------- +2.5V to +5.25V ● Output Voltage Range ------------------------------------------------------------------------------------------- up to +5.25V ● Operation Temperature Range -------------------------------------------------------------------------------- -40°C to +85°C FP6717- 0.3-OCT-2015 4 FP6717 Electrical Characteristics (VIN=3.3V, TA=25°C, unless otherwise specified.) Parameter Symbol VIN Input Supply Voltage Conditions VIN Min Typ 2.5 VIN Supply Current (Switching) VIN=3.3V, VFB=0.7V Measure VIN 300 VIN Supply Current (No witching) VFB=1V 45 Feedback Voltage VFB 2.5V≦VIN≦5.5V 0.784 0.8 Max Unit 5.25 V 500 μA μA 0.816 V High-Side PMOSFET RDS(ON) 42 mΩ Low-Side NMOSFET RDS(ON) 39 mΩ High-Side MOSFET Leakage Current ILX(leak) Low-Side MOSFET Leakage Current Oscillation Frequency VLX=5.5V, VOUT=0V 10 μA VLX=5.5V 10 μA 650 KHz FOSC 450 550 Short Circuit Trip Point Monitored FB voltage 0.3 V Short Circuit Current Limit VIN=3.3V 50 mA Maximum Duty Cycle DMAX VIN=3.3V 90 % ILIM Current RILIM=500K 8 A ILIM Current Gain VIN=3.3V 8 MΩ-A/A Line Regulation VIN=2.5V to 5.5V, IOUT=100mA Load Regulation IOUT=0.5A to 2A 0.5 % 1 % Input UVLO Threshold VUVLO(VTH) VIN Rising 2.3 V Under Voltage Lockout Threshold Hysteresis VUVLO(HYS) VIN Falling 250 mV OVP Threshold Voltage on OUT Pin 5.7 V OVP Threshold Hysteresis 350 mV Internal Soft-Start Time 1 EN Input Low Voltage VEN (L) EN Input High Voltage VEN (H) EN Input Current Thermal (Note 2) Shutdown IEN Threshold Thermal Shutdown Hysteresis FP6717- 0.3-OCT-2015 TSD 1.4 VIN=3.3V 3 ms 0.4 V V 2 μA 150 °C 30 °C 5 FP6717 Typical Performance Curves 5.1 100 90 5 80 4.9 60 VOUT(V ) Efficiency(% ) 70 50 40 4.8 4.7 30 VIN=4.2V VIN=3.6V VIN=3V 20 10 VIN=4.2V VIN=3.6V VIN=3.0V 4.6 4.5 0 0 0.5 1 1.5 2 Load Current(A) 2.5 0 3 Figure 4. Efficiency vs. Output Current (VOUT=5V) VIN=3V, VOUT=5V, IOUT=0A VEN 2V/div. VLX 2V/div. 2.5 3 Figure 5. Output Voltage vs. Output Current VIN=3V, VOUT=5V, IOUT=0A VEN 2V/div. VOUT 2V/div. VLX 2V/div. IL 200mA/div. 1A/div. 40ms/div. Figure 7. Power Off through EN Waveform 200μs/div. Figure 6. Power On through EN Waveform VIN=3V, VOUT=5V, IOUT=0A VIN=3V, VOUT=5V, IOUT=0A VIN VIN 2V/div. 2V/div. VOUT 2V/div. VLX 2V/div. IL 1 1.5 2 Load Current(A) 2V/div. VOUT IL 0.5 VOUT 2V/div. VLX 2V/div. 1A/div. IL 200mA/div. 400μs/div. 400ms/div. Figure 8. Power On through VIN Waveform Figure 9. Power Off through VIN Waveform FP6717- 0.3-OCT-2015 6 FP6717 Typical Performance Curves (Continued) VIN=3V, VOUT=5V, IOUT=3A VEN 2V/div. VOUT 2V/div. VLX 2V/div. IL 5A/div. VIN=4.2V, VOUT=5V, IOUT=3A VEN 2V/div. VOUT 2V/div. VLX 2V/div. IL 5A/div. 400μs/div. Figure 10. Power On through EN Waveform VIN=3.6V, VOUT=5V, IOUT=0A 400μs/div4 Figure 11. Power On through EN Waveform VIN=3.6V, VOUT=5V, IOUT=3A VIN VIN VOUT 50mV/div. VLX 2V/div. IL 2V/div. 2V/div. 200mA/div. VOUT 100mV/div. VLX 2V/div. IL 2A/div. 10ms/div. Figure 12. Switching Waveform VIN=3V, VOUT=5V, IOUT=0.2A3A, 1μs/div. Figure 13. Switching Waveform VIN=4.2V, VOUT=5V, IOUT=0.2A3A VOUT 500mV/div. VOUT 500mV/div. IOUT 1A/div. IOUT 1A/div. 200μs/div 200μs/div. Figure 14. Load Transient Response Figure 15. Load Transient Response FP6717- 0.3-OCT-2015 7 FP6717 Typical Performance Curves (Continued) VIN=3V, VOUT=5V VIN=4.2V, VOUT=5V VOUT 2V/div. VOUT 2V/div. IL 5A/div. IL 5A/div. 1ms/div 1ms/div. Figure 16. Over Current Limit Figure 17. Over Current Limit FP6717- 0.3-OCT-2015 8 FP6717 Outline Information SOP-8 (Exposed Pad) Package (Unit: mm) SYMBOLS UNIT DIMENSION IN MILLIMETER MIN MAX A 1.25 1.70 A1 0.00 0.15 A2 1.25 1.55 B 0.31 0.51 D 4.80 5.00 D1 3.04 3.50 E 3.80 4.00 E1 2.15 2.41 e 1.20 1.34 H 5.80 6.20 L 0.40 1.27 Note：Followed From JEDEC MO-012-E. Carrier Dimensions Life Support Policy Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems . FP6717- 0.3-OCT-2015 9