XL4001 [XLSEMI]
深圳市杰立铭电子有限公司为一级代理商;
| 型号： | XL4001 |
| 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7页 (文件大小：164K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Features
General Description
Wide 4.5V to 40V Input Voltage Range
Output Adjustable from 1.235V to 37V
The XL4001 is a 150KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 2A 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
Minimum Drop Out 1.5V
Fixed 150kHz Switching Frequency
2A Constant Output Current Capability
Internal Optimize Power Transistor
Excellent line and load regulation
TTL shutdown capability
frequency
compensation
and
a
ON/OFF pin with hysteresis function
With output constant current loop
Built in thermal shutdown function
fixed-frequency oscillator.
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. An internal compensation
block is built in to minimize external
component count.
Built in current limit function
Built in output over voltage protection
SOP8-EP (Exposed PAD) package
Applications
Car Charger
Battery Charger
LED Constant Current Driver
Figure1. Package Type of XL4001
Rev 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Pin Configurations
SW 1
SW 2
8 VIN
7 VIN
6 EN
XL4001
3
GND
FB 4
5 CS
Figure2. Pin Configuration of XL4001 (Top View)
Table 1 Pin Description
Pin Number Pin Name Description
Power Switch Output Pin (SW). Output is the switch node that
supplies power to the output.
Ground Pin.(Note: Connected the back exposed PAD to Pin3.)
Feedback Pin (FB). Through an external resistor divider
network, Feedback senses the output voltage and regulates it.
The feedback threshold voltage is 1.235V.
1,2
3
SW
GND
4
FB
5
6
CS
EN
Output Current Sense Pin; (Iload=0.155V/Rcs)
Enable Pin. Drive EN pin low to turn on the device, drive it high
to turn it off. Floating is default low.
Supply Voltage Input Pin. XL4001 operates from a 4.5V to 40V
DC voltage. Bypass Vin to GND with a suitably large capacitor
to eliminate noise on the input.
7,8
VIN
Rev 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Function Block
Figure3. Function Block Diagram of XL4001
Typical Application Circuit (Car Charger)
Figure4. XL4001 Typical Application Circuit (Li Battery Charger)
Rev 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Typical Application Circuit (Buck LED Constant Current Driver)
L 33uh
EN
FB
4
VOUT
6
VIN
C1
SW
7,8 XL4001
1,2
5
LED 1W~5W
R2
3
GND
D1 1N5821
CS
+6V~36V
CIN
COUT
100uf/50V 105
R1 1K
100uf/35V
Rcs
Figure5. XL4001 Typical Application Circuit (LED Constant Current Driver)
Ordering Information
Order Information
XL4001E1
Marking ID
XL4001E1
Package Type
SOP8-EP
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 45
Unit
V
Input Voltage
FB Pin Voltage
EN Pin Voltage
SW Pin Voltage
-0.3 to Vin
V
VFB
-0.3 to Vin
-0.3 to Vin
V
VEN
VSW
PD
V
Power Dissipation
Internally limited
mW
Thermal Resistance
60
ºC/W
RJA
(Junction to Ambient, No Heatsink, Free Air)
Operating Junction Temperature
Storage Temperature
-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 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
XL4001 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 32V, Vout=5V
VFB
1.21 1.235 1.26
83
V
Iload=0.2A to 2A
Vin=12V ,Vout=5V
Iout=2A
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
4.5
40
V
ISTBY
VEN=5V
80
2
200
uA
VEN =0V,
VFB =Vin
Quiescent Supply Current
Iq
5
mA
Oscillator Frequency
Switch Current Limit
Fosc
IL
127
150
3
172
Khz
A
VFB =0
High (Regulator OFF)
Low (Regulator ON)
1.4
0.8
EN Pin Threshold
VEN
V
VFB=0V
ISW=2A
Output Saturation Voltage
VCE
VCS
1.1
1.4
V
V
Constant current sense
Voltage
0.140 0.155 0.170
Rev 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current 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 1.2
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Datasheet
XL4001
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Package Information (SOP8-EP)
Rev 1.2
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