8A 180KHz 40V Buck DC to DC Converter XL4016
Features
n
n n n n n n n n n n n n n
Wide 8V to 40V Input Voltage Range Output Adjustable from 1.25V to 36V Maximum Duty Cycle 100% Minimum Drop Out 0.3V
Fixed 180KHz Switching Frequency 8A 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 Built in input over voltage protection Available in TO220-5L package
General Description
The XL4016 is a 180 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 8A 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 XL4016
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Pin Configurations
Figure2. Pin Configuration of XL4016 (Top View)
Table 1 Pin Description
Pin Number
1
Pin Name GND
2 3 4 5
FB SW VC VIN
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 XL4016.
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. XL4016 operates from a 8V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Function Block
Figure3. Function Block Diagram of XL4016
Typical Application Circuit
Figure4. XL4016 Typical Application Circuit (VIN=8V~40V, VOUT=5V/8A)
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Ordering Information
Package
Temperature
Range
Part Number Lead Free XL4016E1 Marking ID Lead Free XL4016E1 Packing Type
Tube 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 (TO220-5L)
(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 45 -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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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
XL4016 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 8A Vin=12V ,Vout=5V Iout=6A
Vin=24V ,Vout=12V Iout=6A
1.225 1.25 1.275 - -
87 93
- -
V % %
ŋ ŋ
Electrical Characteristics (DC Parameters)
Vin = 12V, GND=0V, Vin & GND parallel connect a 470uf/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 Vin Over Voltage Protection
Symbol Vin Iq Fosc Fosp IL DMAX Rdson OVP
Test Condition
VFB =Vin
VFB =0 VFB=0V VFB=0V, Vin=12V,
ISW=8A
Min. Typ. Max. 8 144
2.1 180 48 10 100 40 45
40 5 216 50
Unit V mA KHz KHz A % mohm V
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Typical System Application (VOUT=5V/8A)
Figure5. XL4016 System Parameters Test Circuit (VIN=8V~40V, VOUT=5V/8A)
Efficiency VS Load current
100959085
Efficiency(%)80757065605550
0.00.51.01.52.02.53.03.54.04.55.05.56.06.57.07.58.0 Vin=8V,Vout=5V Vin=12V,Vout=5V Vin=24V,Vout=5V Vin=36V,Vout=5VLoad current(A)
Figure6. XL4016 System Efficiency Curve
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Typical System Application (VOUT=12V/6A)
Figure7. XL4016 System Parameters Test Circuit (VIN=15V~40V, VOUT=12V/6A)
Efficiency VS Load current
100959085
Efficiency(%)807570656055500.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Vin=15V,Vout=12V Vin=24V,Vout=12V Vin=36V,Vout=12VLoad current(A)
Figure8. XL4016 System Efficiency Curve
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Typical System Application (With Enable function)
Logic level signal 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 3mA; when the TTL Low voltage below 0.8V(referenced to ground), the converter will turn on.
L1 47uH/12A
VIN53SWVOUT=1.25*(1+R2/R1)IOUT=0~8ACC105VCVINCIN470uF/50VC11054XL40162FBD1MBR1545R310KD21N4148OFF(High>3.3V)ON(Low<0.8V)TTL current capability larger than TTL high voltage/(R1+R3)C2105COUT1000uF/25VR210K1GNDR13.3K
Figure9. XL4016 Typical Application Circuit with Enable Function
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深圳市业辉煌电子有限公司 Datasheet
8A 180KHz 40V Buck DC to DC Converter XL4016
Package Information
TO220-5L
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