联系人：曹中立 电话：１３４２８７０６２２３ ＱＱ：１１５７００８１１５ 0.5A 200KHz 65V Buck DC to DC Converter Datasheet XL7005 Features General Description n n Wide 5V to 65V Operation Voltage Output Adjustable from 1.25V to 25V n n Maximum Duty Cycle 100% Minimum Drop Out 1V n n n n Fixed 200KHz Switching Frequency Maximum 0.5A Output Current Recommend output power less than 8W Internal Optimize HV Power Transistor High efficiency up to 85% The XL7005 is a 200KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 0.5A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. n n n n n n n Excellent line and load regulation TTL shutdown capability The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. When output short protection function happens, the operation frequency will be reduced from 200KHz to 45KHz. An internal compensation block is built in to minimize external component count. Built in thermal shutdown function Built in output short Protection Function Built in current limit function SOP8-EP (Exposed PAD) package Applications n n Ebike Controller Power Supply Telecom / Networking Equipment Figure1. Package Type of XL7005 Rev 2.1 www.xlsemi.com 1 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 Pin Configurations VIN 1 8 GND SW 2 7 GND FB 3 6 GND EN 4 5 GND The Exposed PAD is GND XL7005 Figure2. Pin Configuration of XL7005 (Top View) Table 1 Pin Description Pin Number Pin Name 1 VIN 2 SW 5~8 GND 3 FB 4 EN Description Supply Voltage Input Pin. XL7005 operates from a 5V to 65V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL7005. The exposed PAD is GND. Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.25V. Enable Pin. Drive EN pin low to turn on the device, drive it high to turn it off. Floating is default low. Rev 2.1 www.xlsemi.com 2 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 Function Block Figure3. Function Block Diagram of XL7005 Typical Application Circuit Figure4. XL7005 Typical Application Circuit Rev 2.1 www.xlsemi.com 3 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 Ordering Information Order Information XL7005E1 Marking ID XL7005E1 Package Type SOP8-EP Packing Type Supplied As 2500 Units on Tape & Reel XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant. Absolute Maximum Ratings（Note1） Parameter Symbol Vin VFB VEN VSW PD Value -0.3 to 70 -0.3 to Vin -0.3 to Vin -0.3 to Vin 800 Unit V V V V mW Input Voltage Feedback Pin Voltage EN Pin Voltage Output Switch Pin Voltage Power Dissipation Thermal Resistance (SOP8-EP) (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) RJA 60 ºC/W TJ TSTG TLEAD -40 to 125 -65 to 150 260 >3000 ºC ºC ºC V Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Rev 2.1 www.xlsemi.com 4 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 XL7005 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit 1.213 1.25 1.287 V - 83 - % - 81 - % - 76 - % System parameters test circuit figure4 VFB Vin = 20V to 65V Iload=0.05A to 0.5A Vin=36V ,Vout=15V Iout=0.5A Vin=48V ,Vout=15V Iout=0.5A Vin=60V ,Vout=15V Iout=0.5A FB Voltage Efficiency ŋ Efficiency ŋ Efficiency ŋ Electrical Characteristics (DC Parameters) Vin = 48V, GND=0V, Vin & GND parallel connect a 33uf/100V capacitor; Iout=0.2A, Ta = 25℃; the others floating unless otherwise specified. Parameters Symbol Test Condition Min. Typ. 5 Max. Unit 65 V Input operation voltage Vin Shutdown Supply Current ISTBY VEN=2V 85 200 uA Quiescent Supply Current Iq VON/OFF =0V, VFB =Vin 2.5 5 mA 200 275 KHz Oscillator Frequency Fosc Switch Current Limit IL VFB =0 1 A VEN High (Regulator OFF) Low (Regulator ON) 1.6 0.8 V EN Pin Input Leakage Current IH VEN =2.5V (OFF) 6 20 uA IL VEN =0.5V (ON) 1 10 uA Output Saturation Voltage VCE VFB=0V Iout=0.5A 0.88 1 V DMAX VFB=0V 100 EN Pin Threshold Max. Duty Cycle 150 Rev 2.1 % www.xlsemi.com 5 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 Typical System Application Figure5. XL7005 System Application (VIN=20V~65V, VOUT=15V) Rev 2.1 www.xlsemi.com 6 Datasheet 0.5A 200KHz 65V Buck DC to DC Converter XL7005 Package Information Package Information (SOP8-EP) Rev 2.1 www.xlsemi.com 7