XL4015降压型直流电源变换器芯片(大功率型)

5A 180KHz 36V Buck DC to DC Converter XL4015 Features n n n n n n n n n n n n n Wide 8V to 36V Input Voltage Range Output Adjustable from 1.25V to 32V Maximum Duty Cycle 100% Minimum Drop Out 0.3V Fixed 180KHz Switching Frequency 5A Constant Output Current Capability Internal Optimize Power MOSFET High efficiency up to 96% Excellent line and load regulation Built in thermal shutdown function Built in current limit function Built in output short protection function Available in TO263-5L package General Description The XL4015 is a 180 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 5A 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 over current protection function is built inside. When short protection function happens, the operation frequency will be reduced from 180KHz to 48KHz. An internal compensation block is built in to minimize external component count.

Applications n LCD Monitor and LCD TV

n Portable instrument power supply n Telecom / Networking Equipment

Figure1. Package Type of XL4015

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Datasheet

5A 180KHz 36V Buck DC to DC Converter XL4015 Pin Configurations

Figure2. Pin Configuration of XL4015 (Top View)

Table 1 Pin Description

Pin Number

1 Pin Name GND

Description

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 XL4015.

Feedback Pin (FB). Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 1.25V.

Power Switch Output Pin (SW). SW is the switch node that supplies power to the output.

Internal Voltage Regulator Bypass Capacity. In typical system application, The VC pin connect a 1uf capacity to VIN.

Supply Voltage Input Pin. XL4015 operates from a 8V to 36V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.

2 3 4 5

FB SW VC VIN

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Datasheet

5A 180KHz 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)

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Datasheet

5A 180KHz 36V Buck DC to DC Converter XL4015 Ordering Information Order Information XL4015E1 Marking ID XL4015E1 Package Type TO263-5L Packing Type Supplied As 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

Input Voltage Feedback Pin Voltage Output Switch Pin Voltage Power Dissipation

Thermal Resistance (TO263-5L) (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM)

Symbol Vin VFB VOutput PD RJA TJ TSTG TLEAD

Value -0.3 to 40 -0.3 to Vin -0.3 to Vin Internally limited 30 -40 to 125 -65 to 150 260 >2000

Unit 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.

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Datasheet

5A 180KHz 36V Buck DC to DC Converter XL4015 XL4015 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter

Test Condition Min. Typ. Max. Unit

System parameters test circuit figure4 VFB Efficiency Efficiency

Feedback Voltage Vin = 8V to 40V, Vout=5V Iload=0.5A to 5A Vin=12V ,Vout=5V Iout=5A

Vin=24V ,Vout=12V Iout=4A

1.225 1.25 1.275 - -

87 93

- -

V % %

ŋ ŋ

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 Input operation voltage Quiescent Supply Current Oscillator Frequency Output Short Frequency Switch Current Limit Max. Duty Cycle Output Power PMOS

Symbol Vin Iq Fosc Fosp IL DMAX Rdson

Test Condition VFB =Vin

VFB =0 VFB=0V VFB=0V, Vin=12V,

ISW=5A

Min. Typ. Max. 8 144

2.1 180 48 7 100 60

36 5 216 80

Unit V mA KHz KHz A % mohm

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Datasheet

5A 180KHz 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

100959085

Efficiency(%)807570656055500.00.51.01.52.02.53.03..04.55.0 VIN=8V,VOUT=5V,IOUT=0.1A~5A VIN=12V,VOUT=5V,IOUT=0.1A~5A VIN=24V,VOUT=5V,IOUT=0.1A~5A VIN=36V,VOUT=5V,IOUT=0.1A~5ALoad current(A) Figure6. XL4015 System Efficiency Curve

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Datasheet

5A 180KHz 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

100959085Efficiency(%)807570656055500.00.51.01.52.02.53.03..0 VIN=15V,VOUT=12V,IOUT=0.1A~4A VIN=24V,VOUT=12V,IOUT=0.1A~4A VIN=36V,VOUT=12V,IOUT=0.1A~4AOutput current(A)

Figure8. XL4015 System Efficiency Curve

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Datasheet

5A 180KHz 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 3.3V(referenced to ground, lower than VIN), the converter will shutdown, input current less than 5mA; when the TTL Low voltage below 0.8V(referenced to ground), the converter will turn on.

L1 47uH/5AVIN53SWVOUT=1.25*(1+R2/R1)CC105VCVINCIN220uF/50VC110XL40152FBD1B0R310KD21N4148OFF(High>3.3V)ON(Low<0.8V)C2105COUT330uF/25VR210K1GNDR13.3KTTL current capability larger than TTL high voltage/(R1+R3)

Figure9. XL4015 Typical Application Circuit

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Datasheet

5A 180KHz 36V Buck DC to DC Converter XL4015 Schottky Diode Selection Table Current Surface Mount 1A 3A √ √ 5A √ √ √ √ √ √ √ √ √ 1N5820 MBR320 SK32 SR302 1N5823 SR502 SB520 SK52 1N5821 MBR330 SK33 30WQ03 31DQ03 SR303 1N5824 SR503 SB530 SK53 50WQ03 1N5822 SK34 SK35 MBR360 SK36 SR306 SR506 SB560 SK56 MBR340 MBR350 30WQ04 30WQ05 31DQ04 31DQ05 SR304 1N5825 SR504 SB0 SK SR305 SR505 SB550 SK55 Through VR (The same as system maximum input voltage) Hole 20V 30V 40V 50V 60V 1N5817 1N5818 1N5819 √ 50WQ04 50WQ05 Rev 1.3

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Datasheet

5A 180KHz 36V Buck DC to DC Converter XL4015 Package Information

TO263-5L

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