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XL4003 の電気的特性と機能

XL4003のメーカーはXLSEMIです、この部品の機能は「4A 300KHz 32V Buck DC to DC Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号 XL4003
部品説明 4A 300KHz 32V Buck DC to DC Converter
メーカ XLSEMI
ロゴ XLSEMI ロゴ 




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XL4003 Datasheet, XL4003 PDF,ピン配置, 機能
4A 300KHz 32V Buck DC to DC Converter
Datasheet
XL4003
Features
n Wide 5V to 32V Input Voltage Range
n Output Adjustable from 0.8V to 30V
n Maximum Duty Cycle 100%
n Minimum Drop Out 0.6V
n Fixed 300KHz Switching Frequency
n 4A Constant Output Current Capability
n Internal Optimize Power MOSFET
n High efficiency
n Excellent line and load regulation
n TTL shutdown capability
n EN pin with hysteresis function
n Built in thermal shutdown function
n Built in current limit function
n Built in output short protection function
n Available in TO-252 package
Applications
n LCD Monitor and LCD TV
n Digital Photo Frame
n Set-up Box
n ADSL Modem
n Telecom / Networking Equipment
General Description
The XL4003 is a 300KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 4A 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. When short protection function
happens, the operation frequency will be
reduced from 300KHz to 60KHz. An internal
compensation block is built in to minimize
external component count.
Rev 2.3
Figure1. Package Type of XL4003
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XL4003 pdf, ピン配列
4A 300KHz 32V Buck DC to DC Converter
Function Block
Datasheet
XL4003
Figure3. Function Block Diagram of XL4003
Typical Application Circuit
CFF 33n
+24V CIN
C1
220uf/50V 105
R1 R2
2K FB 10.5K
2
VIN 5 XL4003 3 SW
41
EN GND
L 33uh/4A
D1 1N5824
VOUT 5V/4A
COUT LOAD
220uf/50V
24V ~ 5V/4A
VOUT=0.8*(1+R2/R1)
Rev 2.3
Figure4. XL4003 Typical Application Circuit 24V~5V/4A
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
3


3Pages


XL4003 電子部品, 半導体
4A 300KHz 32V Buck DC to DC Converter
Test Circuit and Layout guidelines
Datasheet
XL4003
Figure5. Standard Test Circuits and Layout Guides
Select R1 to be approximately 2K, use a 1% resistor for best stability.
C1 and CFF are optional; in order to increase stability and reduce the input power line noise, CIN
and C1 must be placed near to VIN and GND;
For output voltages greater than approximately 10V, an additional capacitor CFF is required. The
compensation capacitor is typically between 100 pf and 33 nf, and is wired in parallel with the
output voltage setting resistor, R2. It provides additional stability for high output voltage, low
input-output voltages, and/or very low ESR output capacitors, such as solid tantalum capacitors.
CFF=1/(31*1000*R2); This capacitor type can be ceramic, plastic, silver mica, etc. (Because of
the unstable characteristics of ceramic capacitors made with Z5U material, they are not
recommended.)
Rev 2.3
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
6

6 Page



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共有リンク

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