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PDF XL4001 Data sheet ( Hoja de datos )

Número de pieza XL4001
Descripción 2A 150kHz 40V Buck DC/DC Converter
Fabricantes XLSEMI 
Logotipo XLSEMI Logotipo



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No Preview Available ! XL4001 Hoja de datos, Descripción, Manual

2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Datasheet
XL4001
Features
„ Wide 4.5V to 40V Input Voltage Range
„ Output Adjustable from 1.235V to 37V
„ Minimum Drop Out 1.5V
„ Fixed 150kHz Switching Frequency
„ 2A Constant Output Current Capability
„ Internal Optimize Power Transistor
„ Excellent line and load regulation
„ TTL shutdown capability
„ ON/OFF pin with hysteresis function
„ With output constant current loop
„ Built in thermal shutdown function
„ Built in current limit function
„ Built in output over voltage protection
„ SOP8-EP (Exposed PAD) package
General Description
The XL4001 is a 150KHz 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. An internal compensation
block is built in to minimize external
component count.
Applications
„ Car Charger
„ Battery Charger
„ LED Constant Current Driver
Figure1. Package Type of XL4001
Rev 1.2
www.xlsemi.com
1

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XL4001 pdf
2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop
Datasheet
XL4001
XL4001 Electrical Characteristics
Ta = 25 ;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure4
VFB
Efficiency
Feedback
Voltage
ŋ
Vin = 8V to 32V, Vout=5V
Iload=0.2A to 2A
Vin=12V ,Vout=5V
Iout=2A
Min. Typ. Max. Unit
1.21 1.235 1.26 V
- 83 - %
Electrical Characteristics (DC Parameters)
Vin = 12V, GND=0V, Vin & GND parallel connect a 220uf/50V capacitor; Iout=500mA, Ta =
25 ; the others floating unless otherwise specified.
Parameters
Symbol
Test Condition
Min. Typ. Max. Unit
Input operation voltage
Vin
4.5 40 V
Shutdown Supply Current
Quiescent Supply Current
Oscillator Frequency
ISTBY
Iq
Fosc
VEN=5V
VEN =0V,
VFB =Vin
80 200 uA
2 5 mA
127 150 172 Khz
Switch Current Limit
IL
VFB =0
3A
EN Pin Threshold
VEN
High (Regulator OFF)
Low (Regulator ON)
1.4
0.8
V
Output Saturation Voltage
Constant current sense
Voltage
VCE
VCS
VFB=0V
ISW=2A
1.1 1.4 V
0.140 0.155 0.170 V
Rev 1.2
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