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PDF ( 数据手册 , 数据表 ) XL2596

零件编号 XL2596
描述 3A 150KHz 40V Buck DC to DC COnverter
制造商 XLSEMI
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XL2596 数据手册, 描述, 功能
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XLSEMI
3A 150KHz 40V Buck DC to DC Converter
Features
„ Wide 3.6 to 40V Input Voltage Range
„ 3.3V,5V,12V, and adjustable versions
„ Output Adjustable from 1.23V to 38V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 1.3V
„ Fixed 150KHz Switching Frequency
„ 3A Constant Output Current Capability
„ Internal Optimize Power Transistor
„ Up to 90% Efficiency
„ Excellent line and load regulation
„ TTL shutdown capability
„ Built in Frequency Compensation
„ Built in Soft Start Function
„ Built in Thermal Shutdown Function
„ Built in Current Limit Function
„ Built in Short Protection Function
„ Available in TO-220,TO-263 packages
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
Datasheet
XL2596
General Description
The XL2596 is a 150 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
and a short circuit protection function are
built inside. When OCP or SCP happens, the
operation frequency will be reduced from
150KHz to 30KHz. An internal compensation
block is built in to minimize external
component count.
2006 Rev 1.2
Figure1. Package Type of XL2596
1
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XL2596 pdf, 数据表
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XLSEMI
3A 150KHz 40V Buck DC to DC Converter
Electrical Characteristics (System Parameters 5V Version)
Datasheet
XL2596
Fig6. XL2596 System Parameters Test Circuit
Ta = 25 ;unless otherwise specified.
Parameters
Symbol
Feedback Voltage
VFB
VOUT Line Regulation
RLINE
VOUT Load Regulation
RLOAD
Switching Frequency
Frequency of Short
Circuit Protection
Efficiency(12V~5V)
Foutput
Foutput1
ŋ
Test Condition
Vin = 7V to 36V
Vout=5V, Iout=0.5A
Vin = 7V to 36V
Vout=5V, Iout=0.5A
Vin=12V, Vout=5V
Iout=0.5 to 3A
Vin=12V, Vout=5V
Iout=0.5A
Vin=12V, Vout=Short
VFB<2.8V
Vin=12V ,Vout=5V
Iout=3A
Min.
4.8
127
-
Typ. Max. Unit
5 5.2 V
0.5 2 %
0.8 2 %
150 173 KHz
30 KHz
81 - %
2006 Rev 1.2
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