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XL2596 Schematic ( PDF Datasheet ) - XLSEMI

Teilenummer XL2596
Beschreibung 3A 150KHz 40V Buck DC to DC COnverter
Hersteller XLSEMI
Logo XLSEMI Logo 




Gesamt 14 Seiten
XL2596 Datasheet, Funktion
www.DataSheet4U.com
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
www.xlsemi.com






XL2596 Datasheet, Funktion
www.DataSheet4U.com
XLSEMI
3A 150KHz 40V Buck DC to DC Converter
Datasheet
XL2596
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
Input operation voltage
Symbol
Vin
Test Condition
Min. Typ. Max. Unit
3.6 40 V
Shutdown Supply Current
Quiescent Supply Current
Feedback Bias Current
Switch Current Limit
ISTBY
Iq
IFB
IL
VON/OFF=5V
VON/OFF =Gnd,
VFB =Vin
VFB=1.3V
VFB =0
100 200 uA
3 10 mA
0.1 1 uA
3.6 4.8 6.9 A
ON/OFF Pin Threshold
VON/OFF
VFB =0V, VON/OFF
from 0.5V~1.5V
2
1.3 0.6 V
ON/OFF Pin Input
Leakage Current
IH
IL
Output Saturation Voltage VCE
Max. Duty Cycle
Thermal Shutdown
Thermal
Shutdown
Hysteresis
DMAX
TOTSD
THYS
VON/OFF =2.5V (OFF)
VON/OFF =0.5V (ON)
VFB=0V
Iout=3A
VFB=0V
VFB=0V
VFB=0V
5 15 uA
0.2 5 uA
1.3 1.6 V
100 %
165 ºC
20 ºC
2006 Rev 1.2
www.xlsemi.com
6

6 Page









XL2596 pdf, datenblatt
www.DataSheet4U.com
XLSEMI
3A 150KHz 40V Buck DC to DC Converter
Package Information
(1) TO220-5L
Datasheet
XL2596
2006 Rev 1.2
www.xlsemi.com
12

12 Page





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