3A 150KHz 40V Buck DC to DC COnverter

www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Features Wide 3.6 to 40V Input Voltage Range 3.3V,5V,12V, and adjustable versions Output Adjustable from 1.23V to 38V Maximum Duty Cycle 100% Minimum Drop Out 1.3V Datasheet XL2596 General Description The XL2596 is a 150 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. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function and a short circuit protection function are built inside. When OCP or SCP happens, the operation frequency will be reduced from 150KHz to 30KHz. An internal compensation block is built in to minimize external component count. Fixed 150KHz Switching Frequency 3A Constant Output Current Capability Internal Optimize Power Transistor Up to 90% Efficiency Excellent line and load regulation TTL shutdown capability Built in Frequency Compensation Built in Soft Start Function Built in Thermal Shutdown Function Built in Current Limit Function Built in Short Protection Function Available in TO-220,TO-263 packages Applications LCD Monitor and LCD TV Digital Photo Frame Set-up Box ADSL Modem Telecom / Networking Equipment Figure1. Package Type of XL2596 2006 Rev 1.2 1 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Pin Configurations Datasheet XL2596 Figure2. Pin Configuration of XL2596 (Top View) Table 1 Pin Description Pin Number 1 2 3 Pin Name Vin Output GND Description Supply Voltage Input Pin. XL2596 operates from a 3.6V to 40V 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 XL2596. Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.23V. Enable Pin. Drive ON/OFF pin low to turn on the device, drive it high to turn it off. Floating is default low. 4 5 Feedback ON/OFF 2006 Rev 1.2 2 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Function Block Datasheet XL2596 Figure3. Function Block Diagram of XL2596 Typical Application Circuit Fig4. XL2596 Typical Application Circuit 12V-5V/3A 2006 Rev 1.2 3 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Ordering Information XL2596 E1 E1: Lead Free Circuit Type Packing Datasheet XL2596 Blank: Tube TR: Type and Reel Package S: TO263-5L T: TO220-5L TB: TO220B-5L Version ADJ: Adjust 3.3: 3.3V 5.0: 5V 12: 12V Package Temperature Range -40oC ~ 85oC TO220-5L TO220B-5L -40oC ~ 85oC TO263-5L -40oC ~ 85oC Part Number Lead Free XL2596T-ADJE1 XL2596T-3.3E1 XL2596T-5.0E1 XL2596T-12E1 XL2596TB-ADJE1 XL2596TB-3.3E1 XL2596TB-5.0E1 XL2596TB-12E1 XL2596S-ADJE1 XL2596S-3.3E1 XL2596S-5.0E1 XL2596S-12E1 XL2596S-ADJTRE1 XL2596S-3.3TRE1 XL2596S-5.0TRE1 XL2596S-12TRE1 Marking ID Lead Free XL2596T-ADJE1 XL2596T-3.3E1 XL2596T-5.0E1 XL2596T-12E1 XL2596TB-ADJE1 XL2596TB-3.3E1 XL2596TB-5.0E1 XL2596TB-12E1 XL2596S-ADJE1 XL2596S-3.3E1 XL2596S-5.0E1 XL2596S-12E1 XL2596S-ADJTRE1 XL2596S-3.3TRE1 XL2596S-5.0TRE1 XL2596S-12TRE1 Packing Type Tube Tube Tube Tube Tube Tube Tube Tube Tube Tube Tube Tube Tape & Reel Tape & Reel Tape & Reel Tape & Reel XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant. 2006 Rev 1.2 4 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Absolute Maximum Ratings Parameter Input Voltage Feedback Pin Voltage ON/OFF Pin Voltage Output Switch Pin Voltage Power Dissipation Thermal Resistance (TO220 & TO263) (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) Datasheet XL2596 Note1 Symbol Vin VFB VON/OFF VOutput PD RJA TJ TSTG TLEAD Value -0.3 to 45 -0.3 to Vin -0.3 to Vin -0.3 to Vin Internally limited 50 -40 to 125 -65 to 150 260 4000 Unit V V V V mW ºC/W 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. 2006 Rev 1.2 5 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Electrical Characteristics (DC Parameters) Datasheet XL2596 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 Input operation voltage Shutdown Supply Current Quiescent Supply Current Feedback Bias Current Switch Current Limit ON/OFF Pin Threshold ON/OFF Pin Leakage Current Input Symbol Vin ISTBY Iq IFB IL VON/OFF IH IL VCE DMAX TOTSD THYS VON/OFF=5V VON/OFF =Gnd, VFB =Vin VFB=1.3V VFB =0 VFB =0V, VON/OFF from 0.5V~1.5V VON/OFF =2.5V (OFF) VON/OFF =0.5V (ON) VFB=0V Iout=3A VFB=0V VFB=0V VFB=0V 3.6 2 Test Condition Min. 3.6 100 3 0.1 4.8 1.3 5 0.2 1.3 100 165 20 Typ. Max. 40 200 10 1 6.9 0.6 15 5 1.6 Unit V uA mA uA A V uA uA V % ºC ºC Output Saturation Voltage Max. Duty Cycle Thermal Shutdown Thermal Shutdown Hysteresis 2006 Rev 1.2 6 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Electrical Characteristics (System Parameters 3.3V Version) Datasheet XL2596 Fig5. XL2596 System Parameters Test Circuit Ta = 25 ;unless otherwise specified. Parameters Feedback Voltage VOUT Line Regulation VOUT Load Regulation Switching Frequency Frequency of Circuit Protection Short Symbol VFB RLINE RLOAD Foutput Foutput1 Test Condition Vin = 5V to 36V Vout=3.3V, Iout=0.5A Vin = 5V to 36V Vout=3.3V, Iout=0.5A Vin=12V, Vout=3.3V Iout=0.5 to 3A Vin=12V, Vout=3.3V Iout=0.5A Vin=12V, Vout=Short VFB<1.9V Vin=12V ,Vout=3.3V Iout=3A Min. 3.168 Typ. 3.3 0.5 0.8 127 150 30 75 Max. 3.432 2 2 173 Unit V % % KHz KHz % Efficiency(12V~3.3V) ŋ 2006 Rev 1.2 7 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Electrical Characteristics (System Parameters 5V Version) Datasheet XL2596 Fig6. XL2596 System Parameters Test Circuit Ta = 25 ;unless otherwise specified. Parameters Feedback Voltage VOUT Line Regulation VOUT Load Regulation Switching Frequency Frequency of Circuit Protection Efficiency(12V~5V) Short Symbol VFB RLINE RLOAD Foutput Foutput1 Test Condition Vin = 7V to 36V Vout=5V, Iout=0.5A Vin = 7V to 36V Vout=5V, Iout=0.5A Vin=12V, Vout=5V Iout=0.5 to 3A Vin=12V, Vout=5V Iout=0.5A Vin=12V, Vout=Short VFB<2.8V Vin=12V ,Vout=5V Iout=3A Min. 4.8 Typ. 5 0.5 0.8 127 150 30 81 Max. 5.2 2 2 173 Unit V % % KHz KHz % ŋ 2006 Rev 1.2 8 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Electrical Characteristics (System Parameters 12V Version) Datasheet XL2596 Fig7. XL2596 System Parameters Test Circuit Ta = 25 ;unless otherwise specified. Parameters Feedback Voltage VOUT Line Regulation VOUT Load Regulation Switching Frequency Frequency of Circuit Protection Short Symbol VFB RLINE RLOAD Foutput Foutput1 Test Condition Vin = 15V to 36V Vout=12V, Iout=0.5A Vin = 15V to 36V Vout=12V, Iout=0.5A Vin=24V, Vout=12V Iout=0.5 to 3A Vin=24V, Vout=12V Iout=0.5A Vin=24V, Vout=Short VFB<6.8V Vin=24V ,Vout=12V Iout=3A Min. 11.52 Typ. 12 0.6 0.8 127 150 30 90 Max. 12.48 2 2 173 Unit V % % KHz KHz % Efficiency(24V~12V) ŋ 2006 Rev 1.2 9 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Electrical Characteristics (System Parameters ADJ Version) Datasheet XL2596 Fig8. XL2596 System Parameters Test Circuit Ta = 25 ;unless otherwise specified. Parameters Feedback Voltage VOUT Line Regulation VOUT Load Regulation Switching Frequency Frequency of Circuit Protection Efficiency(12V~5V) Short Symbol VFB RLINE RLOAD Foutput Foutput1 Test Condition Vin = 7V to 36V Vout=5V, Iout=0.5A Vin = 7V to 36V Vout=5V, Iout=0.5A Vin=12V, Vout=5V Iout=0.5 to 3A Vin=12V, Vout=5V Iout=0.5A Vin=12V, Vout=Short VFB<0.7V Vin=12V ,Vout=5V Iout=3A Min. 1.193 Typ. 1.23 0.5 0.8 127 150 30 81 Max. 1.267 2 2 173 Unit V % % KHz KHz % ŋ 2006 Rev 1.2 10 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Typical Performance Characteristics (Circuit of Figure 8 ) Datasheet XL2596 2006 Rev 1.2 11 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Package Information (1) TO220-5L Datasheet XL2596 2006 Rev 1.2 12 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Package Information (2) TO220B-5L Datasheet XL2596 2006 Rev 1.2 13 www.xlsemi.com www.DataSheet4U.com XLSEMI 3A 150KHz 40V Buck DC to DC Converter Package Information (3) TO263-5L Datasheet XL2596 2006 Rev 1.2 14 www.xlsemi.com