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Teilenummer | XL2576 |
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Beschreibung | 3A 52KHz 40V Buck DC to DC Converter | |
Hersteller | XLSEMI | |
Logo | ||
Gesamt 14 Seiten 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
3A 52KHz 40V Buck DC to DC Converter
XL2576-3.3 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure5
VOUT
Efficiency
Output
Voltage
ŋ
Vin = 4.75V to 40V
Iload=0.2A to 3A
Vin=12V ,Vout=3.3V
Iout=3A
XL2576-5.0 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure5
VOUT
Efficiency
Output
Voltage
ŋ
Vin = 7V to 40V
Iload=0.2A to 3A
Vin=12V ,Vout=5V
Iout=3A
XL2576-ADJ Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure5
VOUT
Efficiency
Output
Voltage
ŋ
Vin = 4.5V to 40V
Iload=0.2A to 3A
Vin=12V ,Vout=3V
Iout=3A
Datasheet
XL2576
Min. Typ. Max. Unit
3.168 3.3 3.432 V
- 75 - %
Min. Typ. Max. Unit
4.8 5 5.2 V
- 78 - %
Min. Typ. Max. Unit
1.193 1.23 1.267 V
- 73 - %
Rev 2.2
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
6
6 Page 3A 52KHz 40V Buck DC to DC Converter
Datasheet
XL2576
Typical System Application for ADJ Version
CFF 10n
R1 1K
R2 3.1K
+24V
CIN
470uf 50V
FEEDBACK
VIN
1
4
XL2576-ADJ
2
OUTPUT
35
GND ON/OFF
C1
105
OFF
ON
L1 150uh/3A
5V/3A
COUT
D1
LOAD
470uf 35V
1N5821
VOUT=1.23*(1+R2/R1)
Figure8. XL2576-ADJ System Parameters Test Circuit
Rev 2.2
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
12
12 Page | ||
Seiten | Gesamt 14 Seiten | |
PDF Download | [ XL2576 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
XL2576 | 3A 52KHz 40V Buck DC to DC Converter | XLSEMI |
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