XL4005 [ETC]
;
| 型号： | XL4005 |
| 厂家： | 
ETC |
| 描述： | |
| 文件： | 总9页 (文件大小：240K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Features
General Description
n Wide 5V to 32V Input Voltage Range
n Output Adjustable from 0.8V to 30V
The XL4005 is a 300KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 5A load with high
efficiency, low ripple and excellent line and
n
n
Maximum Duty Cycle 100%
Minimum Drop Out 0.6V
n Fixed 300KHz Switching Frequency
n 5A Constant Output Current Capability
n Internal Optimize Power MOSFET
load regulation. Requiring
a
minimum
number of external components, the regulator
is simple to use and include internal
n
n
n
n
n
High efficiency
Excellent line and load regulation
TTL shutdown capability
frequency
compensation
and
a
fixed-frequency oscillator.
EN pin with hysteresis function
Built in thermal shutdown function
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
reduced from 300KHz to 60KHz. An internal
compensation block is built in to minimize
external component count.
n
n
n
Built in current limit function
Built in output short protection function
Available in TO-263 package
Applications
n LCD Monitor and LCD TV
n Digital Photo Frame
n Set-up Box
n ADSL Modem
n Telecom / Networking Equipment
Figure1. Package Type of XL4005
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
1
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Pin Configurations
Figure2. Pin Configuration of XL4005 (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
ground path to prevent switching current spikes from inducing
voltage noise into XL4005.
Feedback Pin (FB). Through an external resistor divider
network, FB senses the output voltage and regulates it. The
feedback threshold voltage is 0.8V.
1
GND
FB
2
Power Switch Output Pin (SW). SW is the switch node that
supplies power to the output.
Enable Pin. Drive EN pin high to turn on the device, drive it
low to turn it off.
3
4
SW
EN
Supply Voltage Input Pin. XL4005 operates from a 5V to 32V
DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
5
VIN
若需 品和
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
Rev 2.1
www.xlsemi.com
2
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Function Block
Figure3. Function Block Diagram of XL4005
Typical Application Circuit
CFF 33n
R1
2K
R2
10.5K
FB
L 33uh/5A
2
VIN
SW
VOUT 5V/5A
5
3
XL4005
4
1
EN
GND
COUT
470uf/50V
LOAD
+24V
470uf/50V 105
D1 1N5824
CIN
C1
24V ~ 5V/5A
VOUT=0.8*(1+R2/R1)
Figure4. XL4005 Typical Application Circuit 24V~5V/5A
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
3
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Ordering Information
Order Information
XL4005E1
Marking ID
XL4005E1
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
Symbol
Vin
Value
-0.3 to 35
Unit
V
Input Voltage
Feedback Pin Voltage
-0.3 to Vin
V
VFB
EN Pin Voltage
-0.3 to Vin
-0.3 to Vin
V
VEN
Output Switch Pin Voltage
Power Dissipation
V
VOutput
PD
Internally limited
mW
Thermal Resistance (TO263)
(Junction to Ambient, No Heatsink, Free Air)
Operating Junction Temperature
Storage Temperature
30
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.
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
4
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
XL4005 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure4
Feedback
Voltage
Vin = 5V to 32V, Vout=5V
VFB
0.776 0.8 0.824
90
V
Iload=0.5A to 5A
Vin=12V ,Vout=5V
Iout=5A
Efficiency
-
-
%
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
Symbol
Vin
Test Condition
Min. Typ. Max. Unit
Input operation voltage
Shutdown Supply Current
5
32
V
ISTBY
VEN=0V
60
3
200
uA
VEN =2V,
VFB =Vin
Quiescent Supply Current
Iq
5
mA
Oscillator Frequency
Switch Current Limit
Fosc
IL
240
300
8
360
Khz
A
VFB =0
High (Regulator ON)
Low (Regulator OFF)
1.4
0.8
EN Pin Threshold
VEN
V
IH
IL
VEN =2V (ON)
VEN =0V (OFF)
VFB=0V
1
1
15
15
uA
uA
%
EN Pin Input Leakage
Current
Max. Duty Cycle
DMAX
100
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
5
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Test Circuit and Layout guidelines
Figure5. Standard Test Circuits and Layout Guides
Select R1 to be approximately 2K, use a 1% resistor for best stability.
C1 and CFF are optional; in order to increase stability and reduce the input power line noise, CIN
and C1 must be placed near to VIN and GND;
For output voltages greater than approximately 10V, an additional capacitor CFF is required. The
compensation capacitor is typically between 100 pf and 33 nf, and is wired in parallel with the
output voltage setting resistor, R2. It provides additional stability for high output voltage, low
input-output voltages, and/or very low ESR output capacitors, such as solid tantalum capacitors.
CFF=1/(31*1000*R2); This capacitor type can be ceramic, plastic, silver mica, etc. (Because of
the unstable characteristics of ceramic capacitors made with Z5U material, they are not
recommended.)
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
6
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
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
1N5823
SR502
SB520
1N5824
SR503
1N5825
SR504
SB540
√
√
√
SR505
SB550
SR506
SB560
5A
SB530
50WQ03
50WQ04 50WQ05
√
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
7
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Typical System Application for 24V ~ 12V/4A Version
CFF 33n
R1
2K
R2
28K
FB
L 33uh/4A
2
VIN
SW
VOUT 12V/4A
5
3
XL4005
1
4
EN
GND
COUT
470uf/50V
LOAD
+24V
CIN
C1
D1 1N5824
470uf/50V 105
24V ~ 12V/4A
VOUT=0.8*(1+R2/R1)
Figure6. XL4005 System Parameters Test Circuit (24V ~ 12V/4A)
Typical System Application for 24V ~ 5V/5A
CFF 33n
R1
2K
R2
10.5K
FB
L 33uh/5A
2
VIN
SW
VOUT 5V/5A
5
3
XL4005
4
1
EN
GND
COUT
470uf/50V
LOAD
+24V
470uf/50V 105
D1 1N5824
CIN
C1
24V ~ 5V/5A
VOUT=0.8*(1+R2/R1)
Figure7. XL4005 System Parameters Test Circuit (24V ~ 5V/5A)
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
8
Datasheet
XL4005
5A 300KHz 32V Buck DC to DC Converter
Package Information
TO263-5L
若需 品和
Rev 2.1
系芯 代理商深圳市莱瑞 科技有限公司，
向
手机13590311415，Q Q 197518900
www.xlsemi.com
9
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