联系电话１３４２８７０６２２３ ＱＱ：１１５７００８１１５ 曹生 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop Datasheet XL2006 Features General Description n n n n n n n n n n n n n n n n The XL2006 is a 160 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A 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. Wide 8V to 32V Input Voltage Range Output Adjustable from 0.8V to 26V Minimum Drop Out 0.3V Fixed 160KHz Switching Frequency Maximum 3A Output Current Capability Internal Optimize Power MOSFET Excellent line and load regulation High efficiency up to 92% TTL shutdown capability EN pin with hysteresis function With output constant current loop Built in Constant Voltage (CV) Loop Built in Constant Current (CC) Loop Built in thermal shutdown function Built in output short protection SOP8-EP package 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. An internal compensation block is built in to minimize external component count. Applications n n Car Charger Battery Charger Figure1. Package Type of XL2006 Rev 1.2 www.xlsemi.com 1 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Pin Configurations NC 1 8 OCSET VIN 2 7 EN SW 3 6 NC GND 4 5 FB The Exposed PAD is SW XL2006 Figure2. Pin Configuration of XL2006 (Top View) Table 1 Pin Description Pin Number 1,6 Pin Name NC 2 VIN 3 SW 4 GND 5 FB 7 EN 8 OCSET Description No Connected. Supply Voltage Input Pin. XL2006 operates from a 8V to 32V 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. (Note: Connected the back exposed PAD to SW.) Ground Pin. Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 0.8V. Enable Pin. Drive EN pin low to turn off the device, drive it high to turn it on. Output Constant Current Set Pin; Rev 1.2 www.xlsemi.com 2 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Function Block Figure3. Function Block Diagram of XL2006 Ordering Information Package Temperature Range Part Number Lead Free XL2006E1 XL2006TRE1 Marking ID Lead Free XL2006E1 XL2006E1 Packing Type Tube Tape & Reel XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant. Absolute Maximum Ratings（Note1） Parameter Symbol Input Voltage FB Pin Voltage EN Pin Voltage SW Pin Voltage Power Dissipation Thermal Resistance (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) Rev 1.2 Vin VFB VEN VSW PD Value -0.3 to 34 -0.3 to Vin -0.3 to Vin -0.3 to Vin Internally limited Unit V V V V mW RJA 60 ºC/W TJ TSTG TLEAD -40 to 125 -65 to 150 260 > 2000 ºC ºC ºC V www.xlsemi.com 3 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 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. XL2006 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit 780 800 820 mV - 89 - % System parameters test circuit figure4 Feedback Voltage VFB Efficiency ŋ Vin = 8V to 30V, Vout=5V Iload=0.2A Vin=12V ,Vout=5V Iout=2.1A Electrical Characteristics (DC Parameters) Vin = 12V, GND=0V, Vin & GND parallel connect a 100uf/35V capacitor; Iout=500mA, Ta = 25℃; the others floating unless otherwise specified, system parameters reference figure4. Parameters Input operation voltage Symbol Test Condition Vin Min. Typ. 8 Max. Unit 32 V Shutdown Supply Current ISTBY VEN=0V 60 200 uA Quiescent Supply Current Iq VEN =2V, VFB =Vin 2.5 5 mA 160 192 KHz Oscillator Frequency Fosc EN Pin Threshold VEN Output Power PMOS Output Voltage Set 128 High (Regulator ON) Low (Regulator OFF) 1.7 1.1 Rdson VFB=0V, Vin=12V, ISW=2A 60 80 mohm VFB Vout=(1+R2/R1)*VFB 0.8 0.82 V Rev 1.2 0.78 V www.xlsemi.com 4 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Typical Application Circuit (Car Charger) Figure4. XL2006 Typical Application Circuit (Car Charger) Figure5. Output Voltage VS Output Current Curve Rev 1.2 www.xlsemi.com 5 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Figure6. Output Current VS Efficiency Curve Figure7. RCS VS Output Current Select Curve Rev 1.2 www.xlsemi.com 6 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Schottky Diode Selection Table Current Surface Mount Through Hole VR (The same as system maximum input voltage) 20V 30V 40V 1N5817 1N5818 1N5819 √ 1A SS12 SS13 SS14 √ 3A √ 1N5820 1N5821 1N5822 √ MBR320 MBR330 MBR340 SK32 SK33 SK34 30WQ03 30WQ04 31DQ03 31DQ04 SR303 SR304 √ √ √ √ SR302 Rev 1.2 www.xlsemi.com 7 Datasheet 3A 160KHz 32V Buck DC/DC Converter With CV/CC Loop XL2006 Package Information Package Information (SOP8-EP) Rev 1.2 www.xlsemi.com 8