Features General Description

1 Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Features General Description n Wide 8V to 36V Input Voltage Range The XL4015 is a 180 KHz fixed frequency n Output Adjustable from to 32V PWM buck (step-down) DC/DC converter, n Maximum Duty Cycle 100% capable of driving a 5A load with high n Minimum Drop Out efficiency, low ripple and excellent line and n Fixed 180 KHz Switching Frequency load regulation. Requiring a minimum n 5A Constant Output Current Capability number of external components, the regulator n Internal Optimize Power MOSFET is simple to use and include internal n High efficiency up to 96% frequency compensation and a n Excellent line and load regulation fixed-frequency oscillator.

2 N Built in thermal shutdown function n Built in current limit function The PWM control circuit is able to adjust the n Built in output short protection function duty ratio linearly from 0 to 100%. An over n Available in TO263-5L package current protection function is built inside. When short protection function happens, the operation frequency will be reduced from 180 KHz to 48 KHz. An internal compensation Applications block is built in to minimize external n LCD Monitor and LCD TV component count. n Portable instrument power supply n Telecom / Networking Equipment Figure1.

3 Package Type of XL4015. Rev 1. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Pin Configurations Figure2. Pin Configuration of XL4015 (Top View). Table 1 Pin Description Pin Number Pin Name Description Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor 1 GND. ground path to prevent switching current spikes from inducing voltage noise into XL4015. Feedback Pin (FB). Through an external resistor divider 2 FB network, FB senses the output voltage and regulates it. The feedback threshold voltage is Power Switch Output Pin (SW).

4 SW is the switch node that 3 SW. supplies power to the output. Internal Voltage Regulator Bypass Capacity. In typical system 4 VC. application, The VC pin connect a 1uf capacity to VIN. Supply Voltage Input Pin. XL4015 operates from a 8V to 36V. 5 VIN DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Rev 2. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Function Block Figure3. Function Block Diagram of XL4015. Typical Application Circuit Figure4. XL4015 Typical Application Circuit (VIN=8V~36V, VOUT=5V/5A).

5 Rev 3. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Ordering Information Order Information Marking ID Package Type Packing Type Supplied As XL4015E1 XL4015E1 TO263-5L 800 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 Value Unit Input Voltage Vin to 40 V. Feedback Pin Voltage VFB to Vin V. Output Switch Pin Voltage VOutput to Vin V. Power Dissipation PD Internally limited mW. Thermal Resistance (TO263-5L). RJA 30 C/W. (Junction to Ambient, No Heatsink, Free Air).

6 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 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 4. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015.

7 XL4015 Electrical Characteristics Ta = 25 ;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure4. Feedback Vin = 8V to 40V, Vout=5V. VFB V. Voltage Iload= to 5A. Vin=12V ,Vout=5V. Efficiency - 87 - %. Iout=5A. Vin=24V ,Vout=12V. Efficiency - 93 - %. Iout=4A. Electrical Characteristics (DC Parameters). Vin = 12V, 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.

8 Unit Input operation voltage Vin 8 36 V. Quiescent Supply Current Iq VFB =Vin 5 mA. Oscillator Frequency Fosc 144 180 216 KHz Output Short Frequency Fosp 48 KHz Switch Current Limit IL VFB =0 7 A. Max. Duty Cycle DMAX VFB=0V 100 %. VFB=0V, Vin=12V, Output Power PMOS Rdson 60 80 mohm ISW=5A. Rev 5. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Typical System Application (VOUT=5V/5A). Figure5. XL4015 System Parameters Test Circuit (VIN=8V~36V, VOUT=5V/5A). Efficiency VS Output current 100. 95. 90. 85. 80. Efficiency(%). 75. VIN=8V,VOUT=5V,IOUT= ~5A.

9 70. VIN=12V,VOUT=5V,IOUT= ~5A. 65 VIN=24V,VOUT=5V,IOUT= ~5A. VIN=36V,VOUT=5V,IOUT= ~5A. 60. 55. 50. Load current(A). Figure6. XL4015 System Efficiency Curve Rev 6. Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Typical System Application (VOUT=12V/4A). Figure7. XL4015 System Parameters Test Circuit (VIN=15V~36V, VOUT=12V/4A). Efficiency VS Output current 100. 95. 90. 85. 80. Efficiency(%). 75 VIN=15V,VOUT=12V,IOUT= ~4A. VIN=24V,VOUT=12V,IOUT= ~4A. 70. VIN=36V,VOUT=12V,IOUT= ~4A. 65. 60. 55. 50. Output current(A). Figure8. XL4015 System Efficiency Curve Rev 7.

10 Datasheet 5A 180 KHz 36V Buck DC to DC Converter XL4015. Typical System Application (TTL shutdown function). Logic level signals shutdown function can be used in typical system application with external components. When the TTL high voltage above (referenced to ground, lower than VIN), the converter will shutdown, input current less than 5mA; when the TTL Low voltage below (referenced to ground), the converter will turn on. L1 47uH/5A. VOUT= *(1+R2/R1). VIN 5 SW. 3. D1 R2. CC XL4015 B540 10K. 105 C2 COUT. R3 105 330uF/25V. 10K. VC. VIN 4 2 FB. 1.