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PDF XL1509 Data sheet ( Hoja de datos )
| Número de pieza | XL1509 | |
| Descripción | 2A 150KHz 40V Buck DC to DC Converter | |
| Fabricantes | XLSEMI | |
| Logotipo |  |
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2A 150KHz 40V Buck DC to DC Converter
Datasheet
XL1509
Features
n Wide 4.5V to 40V Input Voltage Range
n 3.3V,5V,12V, and adjustable versions
n Output Adjustable from 1.23V to 37V
n Maximum Duty Cycle 100%
n Minimum Drop Out 1.5V
n Fixed 150KHz Switching Frequency
n 2A Constant Output Current Capability
n Internal Optimize Power Transistor
n High efficiency
n Excellent line and load regulation
n TTL shutdown capability
n ON/OFF pin with hysteresis function
n Built in thermal shutdown function
n Built in current limit function
n Built in second current limit function
n Available in SOIC8 package
Applications
n LCD Monitor and LCD TV
n Digital Photo Frame
n Set-up Box
n ADSL Modem
n Telecom / Networking Equipment
General Description
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
frequency compensation and a
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.
Rev 2.0
Figure1. Package Type of XL1509
1
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2A 150KHz 40V Buck DC to DC Converter
Datasheet
XL1509
Absolute Maximum Ratings（Note1）
Parameter
Input Voltage
Feedback Pin Voltage
ON/OFF Pin Voltage
Output Switch Pin Voltage
Power Dissipation
Thermal Resistance (SOIC8)
(Junction to Ambient, No Heatsink, Free Air)
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
ESD (HBM)
Symbol
Vin
VFB
VON/OFF
VOutput
PD
RJA
TJ
TSTG
TLEAD
Value
-0.3 to 45
-0.3 to Vin
-0.3 to Vin
-0.3 to Vin
Internally limited
100
-40 to 125
-65 to 150
260
2000
Unit
V
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.
Rev 2.0
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2A 150KHz 40V Buck DC to DC Converter
Datasheet
XL1509
Typical System Application for 3.3V Version
+12V
CIN
470uf 35V
FEEDBACK
3
VIN 1 XL1509-3.3 2 OUTPUT
5~8 4
GND ON/OFF
C1
105
OFF
ON
L1 47uh/2A
3.3V/2A
COUT
D1
1N5820
330uf 35V
LOAD
Figure6. XL1509-3.3 System Parameters Test Circuit
Typical System Application for 5V Version
+12V
CIN
470uf 35V
FEEDBACK
3
VIN 1 XL1509-5.0 2 OUTPUT
5~8 4
GND ON/OFF
C1
105
OFF
ON
L1 68uh/2A
5V/2A
COUT
D1
1N5820
180uf 35V
LOAD
Figure7. XL1509-5.0 System Parameters Test Circuit
Rev 2.0
11
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet XL1509.PDF ] | |
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