XL1509原厂数据手册

Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 1 Features n Wide 4.5V to 40V Input Voltage Range n 3.3V,5V,12V, and adjustable versions n Output Adjustable from 1.23V to 37V n Maximum Duty Cycle 100% n Minimum Drop Out 1.5V n Fixed 150KHz Switching Frequency n 2A Constant Output Current Capability n Internal Optimize Power Transistor n High efficiency n Excellent line and load regulation n TTL shutdown capability n ON/OFF pin with hysteresis function n Built in thermal shutdown function n Built in current limit function n Built in second current limit function n Available in SOIC8 package Applications n LCD Monitor and LCD TV n Digital Photo Frame n Set-up Box n ADSL Modem n Telecom / Networking Equipment General Description The XL1509 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A 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. 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 second current limit function happens, the operation frequency will be reduced from 150KHz to 50KHz. An internal compensation block is built in to minimize external component count. Figure1. Package Type of XL1509 Administrator 附注 原厂代理商: 深圳市森利威尔电子有限公司 联系人：黄先生 手机：13760325070 QQ：2355368872 欢迎咨询,竭诚服务 Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 2 Pin Configurations XL1509 1 3 5 2 4 GND VIN FEEDBACK OUTPUT ON/OFF 6 7 8 GND GND GND Figure2. Pin Configuration of XL1509 (Top View) Table 1 Pin Description Pin Number Pin Name Description 1 VIN Supply Voltage Input Pin. XL1509 operates from a 4.5V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. 2 OUTPUT Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. 5~8 GND 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 XL1509. 3 FEEDBACK Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.23V. 4 ON/OFF Enable Pin. Drive ON/OFF pin low to turn on the device, drive it high to turn it off. Floating is default low. Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 3 Function Block Figure3. Function Block Diagram of XL1509 Typical Application Circuit XL1509-5.0 CIN C1 105 180uf 35VD1 L1 68uh/2A +12V LOAD 1 5~8 4 2 3 GND VIN FEEDBACK OUTPUT ON/OFF ON OFF 5V/2A COUT 1N5820470uf 35V Figure4. XL1509 Typical Application Circuit 12V-5V/2A Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 4 Ordering Information Part Number Marking ID Package Temperature Range Lead Free Lead Free Packing Type XL1509-ADJE1 XL1509-ADJE1 Tube XL1509-3.3E1 XL1509-3.3E1 Tube XL1509-5.0E1 XL1509-5.0E1 Tube XL1509-12E1 XL1509-12E1 Tube XL1509-ADJTRE1 XL1509-ADJE1 Tape & Reel XL1509-3.3TRE1 XL1509-3.3E1 Tape & Reel XL1509-5.0TRE1 XL1509-5.0E1 Tape & Reel SOIC8 -40oC ~ 85oC XL1509-12TRE1 XL1509-12E1 Tape & Reel XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant. XL1509 Circuit Type Blank: Tube TR: Type and Reel E1: Lead Free E1 Packing Version ADJ: Adjust 3.3: 3.3V 5.0: 5V 12: 12V Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 5 Absolute Maximum Ratings（Note1） Parameter Symbol Value Unit Input Voltage Vin -0.3 to 45 V Feedback Pin Voltage VFB -0.3 to Vin V ON/OFF Pin Voltage VON/OFF -0.3 to Vin V Output Switch Pin Voltage VOutput -0.3 to Vin V Power Dissipation PD Internally limited mW Thermal Resistance (SOIC8) (Junction to Ambient, No Heatsink, Free Air) RJA 100 ºC/W Operating Junction Temperature TJ -40 to 125 ºC Storage Temperature TSTG -65 to 150 ºC Lead Temperature (Soldering, 10 sec) TLEAD 260 ºC ESD (HBM) 2000 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. Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 6 XL1509-3.3 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure5 VOUT Output Voltage Vin = 4.75V to 40V Iload=0.2A to 2A 3.168 3.3 3.432 V Efficiency ŋ Vin=12V ,Vout=3.3V Iout=2A - 75 - % XL1509-5.0 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure5 VOUT Output Voltage Vin = 7V to 40V Iload=0.2A to 2A 4.8 5 5.2 V Efficiency ŋ Vin=12V ,Vout=5V Iout=2A - 82 - % XL1509-12 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure5 VOUT Output Voltage Vin = 15V to 40V Iload=0.2A to 2A 11.52 12 12.48 V Efficiency ŋ Vin=25V ,Vout=12V Iout=2A - 90 - % XL1509-ADJ Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure5 VOUT Output Voltage Vin = 4.5V to 40V Iload=0.2A to 2A 1.193 1.23 1.267 V Efficiency ŋ Vin=12V ,Vout=3V Iout=2A - 74 - % Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 7 Electrical Characteristics (DC Parameters) Vin = 12V for the 3.3V,5V,and Adjustable versions and Vin=24V for the 12V version, GND=0V, Vin & GND parallel connect a 220uf/50V capacitor; Iout=500mA, Ta = 25℃; the others floating unless otherwise specified. Parameters Symbol Test Condition Min. Typ. Max. Unit Input operation voltage Vin 4.5 40 V Shutdown Supply Current ISTBY VON/OFF=5V 80 200 uA Quiescent Supply Current Iq VON/OFF =0V, VFB =Vin 2 10 mA Oscillator Frequency Fosc 127 150 173 Khz Switch Current Limit IL VFB =0 4 A ON/OFF Pin Threshold VON/OFF High (Regulator OFF) Low (Regulator ON) 1.4 0.8 V IH VON/OFF =2.5V (OFF) 5 15 uA ON/OFF Pin Input Leakage Current IL VON/OFF =0.5V (ON) 0.2 5 uA Output Saturation Voltage VCE VFB=0V Iout=2A 1.2 1.4 V Max. Duty Cycle DMAX VFB=0V 100 % Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 8 Test Circuit and Layout guidelines Figure5. Standard Test Circuits and Layout Guides Select R1 to be approximately 1K, use a 1% resistor for best stability. C1 and CFF are optional; in order to increase stability and reduce the input power line noise, CIN and C1 must be placed near to PIN1 and PIN5~8; For output voltages greater than approximately 10V, an additional capacitor CFF is required. The compensation capacitor is typically between 100 pf and 33 nf, and is wired in parallel with the output voltage setting resistor, R2. It provides additional stability for high output voltage, low input-output voltages, and/or very low ESR output capacitors, such as solid tantalum capacitors. CFF=1/(31*1000*R2); This capacitor type can be ceramic, plastic, silver mica, etc. (Because of the unstable characteristics of ceramic capacitors made with Z5U material, they are not recommended.) Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 9 XL1509 Series Buck Regulator Design Procedure (Fixed Output) Output Capacitor (COUT) Conditions Inductor (L1) Through Hole Electrolytic Surface Mount Tantalum Output Voltage (V) Load Current (A) Max Input Voltage (V) Inductance (uh) Panasonic HFQ Series (uf/V) Nichicon PL Series (uf/V) AVX TPS Series (uf/V) Sprague 595D Series (uf/V) 6 22 470/25 470/35 330/6.3 390/6.3 10 33 330/35 330/35 330/6.3 390/6.3 3.3 2 40 47 330/35 270/50 220/10 330/10 9 22 470/25 560/16 220/10 330/10 20 68 180/35 180/35 100/10 270/10 5 2 40 68 180/35 180/35 100/10 270/10 15 33 330/25 330/25 100/16 180/16 20 68 180/25 180/25 100/16 120/20 12 2 40 150 82/25 82/25 68/20 68/25 Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 10 XL1509 Series Buck Regulator Design Procedure (Adjustable Output) Through Hole Output Electrolytic Surface Mount Output Capacitor Output Voltage (V) Panasonic HFQ Series (uf/V) Nichicon PL Series (uf/V) Feedforward Capacitor AVX TPS Series (uf/V) Sprague 595D Series (uf/V) Feedforward Capacitor 2 820/35 820/35 33nf 330/6.3 470/4 33nf 4 560/35 470/35 10nf 330/6.3 390/6.3 10nf 6 470/25 470/35 3.3nf 220/10 330/10 3.3nf 9 330/25 330/25 1.5nf 100/16 180/16 1.5nf 12 330/25 330/25 1nf 100/16 180/16 1nf 15 220/25 220/35 680pf 68/20 120/20 680pf 24 220/35 150/35 560pf 33/25 33/25 220pf 28 100/50 100/50 390pf 10/35 15/50 220pf Schottky Diode Selection Table Current Surface Mount Through Hole VR (The same as system maximum input voltage) 20V 30V 40V 50V 60V 1A √ 1N5817 1N5818 1N5819 √ 1N5820 1N5821 1N5822 √ MBR320 MBR330 MBR340 MBR350 MBR360 √ SK32 SK33 SK34 SK35 SK36 √ 30WQ03 30WQ04 30WQ05 √ 31DQ03 31DQ04 31DQ05 3A √ SR302 SR303 SR304 SR305 SR306 Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 11 Typical System Application for 3.3V Version XL1509-3.3 CIN C1 105 330uf 35VD1 L1 47uh/2A +12V LOAD 1 5~8 4 2 3 GND VIN FEEDBACK OUTPUT ON/OFF ON OFF 3.3V/2A COUT 1N5820470uf 35V Figure6. XL1509-3.3 System Parameters Test Circuit Typical System Application for 5V Version XL1509-5.0 CIN C1 105 180uf 35VD1 L1 68uh/2A +12V LOAD 1 5~8 4 2 3 GND VIN FEEDBACK OUTPUT ON/OFF ON OFF 5V/2A COUT 1N5820470uf 35V Figure7. XL1509-5.0 System Parameters Test Circuit Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 12 Typical System Application for 12V Version XL1509-12 CIN C1 105 180uf 25VD1 L1 68uh/2A +24V LOAD 1 5~8 4 2 3 GND VIN FEEDBACK OUTPUT ON/OFF ON OFF 12V/2A COUT 1N5821470uf 50V Figure8. XL1509-12 System Parameters Test Circuit Typical System Application for ADJ Version XL1509-ADJ CIN C1 105 470uf 35VD1 L1 47uh/2A +24V LOAD 1 5~8 4 2 3 GND VIN FEEDBACK OUTPUT ON/OFF ON OFF 5V/2A COUT 1N5821470uf 50V R1 1K R2 3.1K CFF 3.3n VOUT=1.23*(1+R2/R1) Figure9. XL1509-ADJ System Parameters Test Circuit Datasheet 2A 150KHz 40V Buck DC to DC Converter XL1509 Rev 2.0 www.xlsemi.com 13 Package Information SOP8 Package Mechanical Dimensions