XL1513规格书(官方版).pdf
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1、 2A 380KHz 18V Buck DC to DC Converter XL1513 1 Features?Wide 3.6V to 18V Input Voltage Range?Output Adjustable from 0.8V to 16V?Maximum Duty Cycle 100%?Minimum Drop Out 0.6V?Fixed 380KHz Switching Frequency?2A Constant Output Current Capability?Internal Optimize Power MOSFET?High efficiency?Excelle
2、nt line and load regulation?TTL shutdown capability?EN pin with hysteresis function?Built in thermal shutdown function?Built in current limit function?Built in output short protection function?Available in SOP8 package Applications?LCD Monitor and LCD TV?Digital Photo Frame?Set-up Box?ADSL Modem?Tel
3、ecom/Networking Equipment General Description The XL1513 is a 380KHz 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
4、 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 short protection function happens,the operation frequency will be
5、 reduced from 380KHz to 80KHz.An internal compensation block is built in to minimize external component count.Figure1.Package Type of XL1513 2A 380KHz 18V Buck DC to DC Converter XL1513 2 Pin Configurations XL151313524SWFBNCENVIN678SWGNDGND Figure2.Pin Configuration of XL1513(Top View)Table 1 Pin De
6、scription Pin Number Pin Name Description 3 NC No Connected.4 VIN Supply Voltage Input Pin.XL1513 operates from a 3.6V to 18V DC voltage.Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.5,6 SW Power Switch Output Pin(SW).Output is the switch node that supplies power
7、to the output.7,8 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 XL1513.1 FB Feedback Pin(FB).Through an external resistor divider network,Feedbac
8、k senses the output voltage and regulates it.The feedback threshold voltage is 0.8V.2 EN Enable Pin.Drive EN pin low to turn off the device,drive it high to turn it on.Floating is default high.2A 380KHz 18V Buck DC to DC Converter XL1513 3 Function Block Figure3.Function Block Diagram of XL1513 Typi
9、cal Application Circuit Efficiency Figure4.XL1513 Typical Application Circuit 2A 380KHz 18V Buck DC to DC Converter XL1513 4 Ordering Information Part Number Marking ID Lead Free Lead Free Packing Type XL1513E1 XL1513E1 Tube Package Temperature Range XL1513TRE1 XL1513E1 Tape&Reel XLSEMI Pb-free prod
10、ucts,as designated with“E1”suffix in the par number,are RoHS compliant.Absolute Maximum Ratings(Note1)Parameter Symbol Value Unit Input Voltage Vin-0.3 to 20 V Feedback Pin Voltage VFB-0.3 to Vin V EN Pin Voltage VEN-0.3 to Vin V Output Switch Pin Voltage VOutput-0.3 to Vin V Power Dissipation PD In
11、ternally limited mW Thermal Resistance(SOP8)(Junction to Ambient,No Heatsink,Free Air)RJA 100 C/W Operating Junction Temperature TJ-40 to 125 C Storage Temperature TSTG-65 to 150 C Lead Temperature(Soldering,10 sec)TLEAD 260 C ESD(HBM)2000 V Note1:Stresses greater than those listed under Maximum Rat
12、ings 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.2A 380KH
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