XL2009 [XLSEMI]
深圳市杰立铭电子有限公司为一级代理商;
| 型号： | XL2009 |
| 厂家： | 
XLSEMI |
| 描述： | 深圳市杰立铭电子有限公司为一级代理商 电子 |
| 文件： | 总9页 (文件大小：178K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Features
General Description
Wide 8V to 36V Input Voltage Range
Output Adjustable from 1.25V to 32V
The XL2009 is a 180 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 2.5A 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
Maximum Duty Cycle 100%
Minimum Drop Out 0.3V
Fixed 180KHz Switching Frequency
Maximum 3A Switching Current
Internal Optimize Power MOSFET
High efficiency
frequency
compensation
and
a
Excellent line and load regulation
fixed-frequency oscillator.
With output constant current loop
Built in thermal shutdown function
Built in current limit function
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.
Built in output short protection function
Available in SOP8L package
Applications
Car Charger
Battery Charger
LCD Monitor and LCD TV
Portable instrument power supply
Telecom / Networking Equipment
Figure1. Package Type of XL2009
Rev 1.1
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1
Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Pin Configurations
Figure2. Pin Configuration of XL2009 (Top View)
Table 1 Pin Description
Pin Number
Pin Name Description
Feedback Pin (FB). Through an external resistor divider
network, FB senses the output voltage and regulates it. The
feedback threshold voltage is 1.25V.
1
FB
2
3
OCSET
VC
Output Constant Current Set Pin.
Internal Voltage Regulator Bypass Capacity. In typical system
application, The VC pin connect a 1uf capacity to VIN.
Supply Voltage Input Pin. XL2009 operates from a 8V to 36V
DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
4
VIN
SW
Power Switch Output Pin (SW). SW is the switch node that
supplies power to the output.
5,6
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 XL2009.
7,8
GND
Rev 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Function Block
Figure3. Function Block Diagram of XL2009
Typical Application Circuit
Figure4. XL2009 Typical Application Circuit (VIN=8V~36V, VOUT=5V/2.1A)
Rev 1.1
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3
Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Ordering Information
Order Information
XL2009E1
Marking ID
XL2009E1
Package Type
SOP8L
Packing Type Supplied As
2500 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
Vin
Value
-0.3 to 40
Unit
V
Input Voltage
Feedback Pin Voltage
-0.3 to Vin
V
VFB
Output Switch Pin Voltage
Power Dissipation
-0.3 to Vin
V
VOutput
PD
Internally limited
mW
Thermal Resistance (SOP8L)
(Junction to Ambient, No Heatsink, Free Air)
Operating Junction Temperature
Storage Temperature
100
ºC/W
RJA
-40 to 125
-65 to 150
260
ºC
ºC
ºC
V
TJ
TSTG
TLEAD
Lead Temperature (Soldering, 10 sec)
ESD (HBM)
>2000
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 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
XL2009 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure4
Feedback
Voltage
Vin = 8V to 36V, Vout=5V
VFB
1.225 1.25 1.275
89
V
Iload=0.5A to 2.5A
Vin=12V ,Vout=5V
Iout=2.1A
Efficiency
-
-
%
ŋ
Electrical Characteristics (DC Parameters)
Vin = 12V, GND=0V, Vin & GND parallel connect a 100uf/50V capacitor; Iout=500mA, Ta =
25℃; the others floating unless otherwise specified.
Parameters
Symbol
Vin
Test Condition
Min. Typ. Max.
Unit
V
Input operation voltage
Quiescent Supply Current
8
36
5
Iq
VFB =Vin
2.1
180
48
mA
Oscillator Frequency
Output Short Frequency
Switch Current Limit
Max. Duty Cycle
Fosc
Fosp
IL
153
207
KHz
KHz
A
VFB =0
4
DMAX
VFB=0V
100
%
VFB=0V, Vin=12V,
ISW=3A
Output Power PMOS
Rdson
60
80
mohm
Rev 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Typical System Application (VOUT=5V/2.1A)
Figure5. XL2009 System Parameters Test Circuit (VIN=8V~36V, VOUT=5V/2.1A)
Output voltage VS Output current
5.5
5.0
4.5
4.0
3.5
3.0
VIN=12V,VOUT=5V,RCS=14K
VIN=24V,VOUT=5V,RCS=14K
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Output current(A)
Figure6. XL2009 System Output Constant Current Curve
Rev 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Efficiency VS Load current
100
95
90
85
80
75
Vin=8V,Vout=5V
Vin=12V,Vout=5V
Vin=24V,Vout=5V
70
65
Vin=36V,Vout=5V
60
55
50
45
40
0.0 0.2
0.4
0.6
0.8
1.0 1.2
1.4
1.6
1.8
2.0
2.2 2.4
Load current(A)
Figure7. XL2009 System Efficiency Curve
Output current VS RCS
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
VIN=12V,VOUT=5V
VIN=24V,VOUT=5V
IOUT=1.0A,RCS=5K
IOUT=1.5A,RCS=8K
IOUT=1.8A,RCS=11K
IOUT=2.1A,RCS=14K
IOUT=2.5A,RCS=16K
0
2
4
6
8
10
12
14
16
RCS(Kohm)
Figure8. RCS VS Output Current Select Curve
Rev 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Schottky Diode Selection Table
Current Surface Through VR (The same as system maximum input voltage)
Mount Hole
20V
30V
40V
50V
60V
1N5817
1N5818
1N5819
1A
3A
√
1N5820
MBR320
SK32
1N5821
MBR330
SK33
1N5822
√
√
MBR340 MBR350
SK34 SK35
MBR360
SK36
√
√
30WQ03
31DQ03
SR303
30WQ04 30WQ05
31DQ04 31DQ05
√
√
SR302
SR304
SR305
SR306
Rev 1.1
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Datasheet
XL2009
3A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Package Information
SOP8 Package Mechanical Dimensions
Rev 1.1
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