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PDF XL2576 Data sheet ( Hoja de datos )
| Número de pieza | XL2576 | |
| Descripción | 3A 52KHz 40V Buck DC to DC Converter | |
| Fabricantes | XLSEMI | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de XL2576 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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3A 52KHz 40V Buck DC to DC Converter
Datasheet
XL2576
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 52KHz Switching Frequency
n 3A 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 Available in TO-220,TO-263 packages
General Description
The XL2576 is a 52 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 3A 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. An internal compensation
block is built in to minimize external
component count.
Applications
n LCD Monitor and LCD TV
n Digital Photo Frame
n Set-up Box
n ADSL Modem
n Telecom / Networking Equipment
Rev 2.2
Figure1. Package Type of XL2576
1
1 page  
3A 52KHz 40V Buck DC to DC Converter
Datasheet
XL2576
Absolute Maximum Ratings（Note1）
Parameter
Input Voltage
Feedback Pin Voltage
ON/OFF Pin Voltage
Output Switch Pin Voltage
Power Dissipation
Thermal Resistance (TO220 & TO263)
(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
50
-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 2.2
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
5
5 Page 
3A 52KHz 40V Buck DC to DC Converter
Datasheet
XL2576
Typical System Application for 3.3V Version
+12V
CIN
470uf 35V
FEEDBACK
4
VIN 1 XL2576-3.3 2 OUTPUT
35
GND ON/OFF
C1
105
OFF
ON
L1 100uh/3A
3.3V/3A
COUT
D1
1N5820
470uf 35V
LOAD
Figure6. XL2576-3.3 System Parameters Test Circuit
Typical System Application for 5V Version
+12V
CIN
470uf 35V
FEEDBACK
4
VIN 1 XL2576-5.0 2 OUTPUT
35
GND ON/OFF
C1
105
OFF
ON
L1 100uh/3A
5V/3A
COUT
D1
1N5820
330uf 35V
LOAD
Figure7. XL2576-5.0 System Parameters Test Circuit
Rev 2.2
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet XL2576.PDF ] | |
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