XL1509ADV2500E1 [XLSEMI]
2A 150KHz 40V Buck DC to DC Converter;
| 型号： | XL1509ADV2500E1 |
| 厂家： | 
XLSEMI |
| 描述： | 2A 150KHz 40V Buck DC to DC Converter |
| 文件： | 总13页 (文件大小：219K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Features
General Description
Wide 4.5V to 40V Input Voltage Range
3.3V,5V,12V, and adjustable versions
Output Adjustable from 1.23V to 37V
The XL1509 is a 150 KHz 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
Maximum Duty Cycle 100%
Minimum Drop Out 1.5V
Fixed 150KHz Switching Frequency
2A Constant Output Current Capability
Internal Optimize Power Transistor
frequency
compensation
and
a
High efficiency
Excellent line and load regulation
TTL shutdown capability
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. When second current limit
function happens, the operation frequency
will be reduced from 150KHz to 50KHz. An
internal compensation block is built in to
minimize external component count.
ON/OFF pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Built in second current limit function
Available in SOP8L package
Applications
LCD Monitor and LCD TV
Digital Photo Frame
Set-up Box
ADSL Modem
Telecom / Networking Equipment
Figure1. Package Type of XL1509
Rev 2.0
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1
Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Pin Configurations
VIN 1
OUTPUT 2
8 GND
7 GND
6 GND
XL1509
3
FEEDBACK
ON/OFF 4
5 GND
Figure2. Pin Configuration of XL1509 (Top View)
Table 1 Pin Description
Pin Number
Pin Name Description
Supply Voltage Input Pin. XL1509 operates from a 4.5V to
40V DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
1
VIN
Power Switch Output Pin (SW). Output is the switch node that
supplies power to the output.
2
OUTPUT
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 XL1509.
5~8
GND
Feedback Pin (FB). Through an external resistor divider
3
4
FEEDBACK network, Feedback senses the output voltage and regulates it.
The feedback threshold voltage is 1.23V.
Enable Pin. Drive ON/OFF pin low to turn on the device, drive
ON/OFF
it high to turn it off. Floating is default low.
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Function Block
Figure3. Function Block Diagram of XL1509
Typical Application Circuit
Figure4. XL1509 Typical Application Circuit 12V-5V/2A
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Ordering Information
XL1509
E1
E1: Lead Free
Packing
Type and Reel
Circuit Type
Version
ADJ: Adjust
3.3: 3.3V
5.0: 5V
12: 12V
Temperature
Range
Marking ID
Package
Packing Type Supplied As
Lead Free
XL1509-ADJE1
XL1509-3.3E1
XL1509-5.0E1
XL1509-12E1
2500 Units on Tape & Reel
2500 Units on Tape & Reel
2500 Units on Tape & Reel
2500 Units on Tape & Reel
SOP8L
-40oC ~ 85oC
XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant.
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Absolute Maximum Ratings（Note1）
Parameter
Input Voltage
Symbol
Vin
Value
-0.3 to 45
Unit
V
Feedback Pin Voltage
-0.3 to Vin
V
VFB
ON/OFF Pin Voltage
-0.3 to Vin
-0.3 to Vin
V
VON/OFF
VOutput
PD
Output Switch Pin Voltage
Power Dissipation
V
Internally limited
mW
Thermal Resistance (SOIC8)
(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 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
XL1509-3.3 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure5
Output
Voltage
Vin = 4.75V to 40V
VOUT
3.168 3.3 3.432
75
V
Iload=0.2A to 2A
Vin=12V ,Vout=3.3V
Iout=2A
Efficiency
-
-
%
ŋ
XL1509-5.0 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure5
Output
Voltage
Vin = 7V to 40V
VOUT
4.8
-
5
5.2
-
V
Iload=0.2A to 2A
Vin=12V ,Vout=5V
Iout=2A
Efficiency
82
%
ŋ
XL1509-12 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure5
Output
Voltage
Vin = 15V to 40V
VOUT
11.52
-
12
90
12.48
-
V
Iload=0.2A to 2A
Vin=25V ,Vout=12V
Iout=2A
Efficiency
%
ŋ
XL1509-ADJ Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
System parameters test circuit figure5
Output
Voltage
Vin = 4.5V to 40V
VOUT
1.193 1.23 1.267
74
V
Iload=0.2A to 2A
Vin=12V ,Vout=3V
Iout=2A
Efficiency
-
-
%
ŋ
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Electrical Characteristics (DC Parameters)
Vin = 12V for the 3.3V,5V,and Adjustable versions and Vin=24V for the 12V version, 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
VON/OFF=5V
VON/OFF =0V,
80
2
200
uA
Quiescent Supply Current
Iq
10
mA
VFB =Vin
Oscillator Frequency
Switch Current Limit
Fosc
IL
127
150
4
173
Khz
A
VFB =0
High (Regulator OFF)
Low (Regulator ON)
1.4
0.8
ON/OFF Pin Threshold
VON/OFF
V
IH
IL
VON/OFF =2.5V (OFF)
VON/OFF =0.5V (ON)
5
15
5
uA
uA
ON/OFF
Pin
Input
Leakage Current
0.2
VFB=0V
Iout=2A
Output Saturation Voltage
Max. Duty Cycle
VCE
1.2
1.4
V
DMAX
VFB=0V
100
%
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Test Circuit and Layout guidelines
LOCATE THE PROGRAMMING RESISTORS NEAR
THE FEEDBACK PIN USING SHORT LEADS
CFF
KEEP FEEDBACK WIRING AWAY
FROM INDUCTOR FLUX
R2
R1 1K
FEEDBACK
L1
3
REGULATED OUTPUT
VIN
OUTPUT
XL1509
1
2
ADJUSTABLE
5~8
GND
4
ON/OFF
UNREGULATED
DC INPUT
LOAD
COUT
CIN
C1
105
D1
OFF
ON
HEAVY LINES MUST BE KEPT SHORT AND USE
GROUND PLANE CONSTRUCTION FOR BEST RESULTS
VOUT=1.23*(1+R2/R1)
Figure5. Standard Test Circuits and Layout Guides
Select R1 to be approximately 1K, 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 PIN1 and PIN5~8;
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.)
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
XL1509 Series Buck Regulator Design Procedure (Fixed Output)
Conditions
Inductor
(L1)
Output Capacitor (COUT)
Through Hole Electrolytic
Surface Mount Tantalum
Output Load
Max Input Inductance Panasonic
Nichicon
PL Series
(uf/V)
AVX TPS
Series
Sprague
595D Series
(uf/V)
Voltage Current Voltage (V) (uh)
HFQ Series
(uf/V)
(V)
3.3
(A)
2
(uf/V)
6
22
33
47
22
68
68
33
68
150
470/25
330/35
330/35
470/25
180/35
180/35
330/25
180/25
82/25
470/35
330/35
270/50
560/16
180/35
180/35
330/25
180/25
82/25
330/6.3
330/6.3
220/10
220/10
100/10
100/10
100/16
100/16
68/20
390/6.3
390/6.3
330/10
330/10
270/10
270/10
180/16
120/20
68/25
10
40
9
5
2
2
20
40
15
20
40
12
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
XL1509 Series Buck Regulator Design Procedure (Adjustable Output)
Output
Voltage
(V)
Through Hole Output Electrolytic
Surface Mount Output Capacitor
Panasonic
HFQ Series
(uf/V)
Nichicon
PL Series
(uf/V)
Feedforward AVX TPS
Sprague
595D Series
(uf/V)
Feedforward
Capacitor
Capacitor
Series
(uf/V)
330/6.3
330/6.3
220/10
100/16
100/16
68/20
2
820/35
560/35
470/25
330/25
330/25
220/25
220/35
100/50
820/35
470/35
470/35
330/25
330/25
220/35
150/35
100/50
33nf
470/4
33nf
4
10nf
390/6.3
330/10
180/16
180/16
120/20
33/25
10nf
6
3.3nf
1.5nf
1nf
3.3nf
1.5nf
1nf
9
12
15
24
28
680pf
560pf
390pf
680pf
220pf
220pf
33/25
10/35
15/50
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 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Typical System Application for 3.3V Version
Figure6. XL1509-3.3 System Parameters Test Circuit
Typical System Application for 5V Version
Figure7. XL1509-5.0 System Parameters Test Circuit
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Typical System Application for 12V Version
Figure8. XL1509-12 System Parameters Test Circuit
Typical System Application for ADJ Version
Figure9. XL1509-ADJ System Parameters Test Circuit
Rev 2.0
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Datasheet
XL1509
2A 150KHz 40V Buck DC to DC Converter
Package Information
SOP8 Package Mechanical Dimensions
Rev 2.0
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