DC Converter. XL4005 Datasheet

XL4005 Datasheet PDF


Part Number

XL4005

Description

5A 300KHz 32V Buck DC to DC Converter

Manufacture

XLSEMI

Total Page 9 Pages
Datasheet
Download XL4005 Datasheet


XL4005
5A 300KHz 32V Buck DC to DC Converter
Datasheet
XL4005
Features
Wide 5V to 32V Input Voltage Range
Output Adjustable from 0.8V to 30V
Maximum Duty Cycle 100%
Minimum Drop Out 0.6V
Fixed 300KHz Switching Frequency
5A Constant Output Current Capability
Internal Optimize Power MOSFET
High efficiency
Excellent line and load regulation
TTL shutdown capability
EN pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Built in output short protection function
Available in TO-263 package
Applications
LCD Monitor and LCD TV
Digital Photo Frame
Set-up Box
ADSL Modem
Telecom / Networking Equipment
General Description
The XL4005 is a 300KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 5A 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 2.2
Figure1. Package Type of XL4005
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1

XL4005
5A 300KHz 32V Buck DC to DC Converter
Pin Configurations
Datasheet
XL4005
Figure2. Pin Configuration of XL4005 (Top View)
Table 1 Pin Description
Pin Number
1
2
3
4
5
Pin Name
GND
FB
SW
EN
VIN
Description
Ground Pin. Care must be taken in layout. This pin should be
placed outside of the Schottky Diode to output capacitor
ground path to prevent switching current spikes from inducing
voltage noise into XL4005.
Feedback Pin (FB). Through an external resistor divider
network, FB senses the output voltage and regulates it. The
feedback threshold voltage is 0.8V.
Power Switch Output Pin (SW). SW is the switch node that
supplies power to the output.
Enable Pin. Drive EN pin high to turn on the device, drive it
low to turn it off.
Supply Voltage Input Pin. XL4005 operates from a 5V to 32V
DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
Rev 2.2
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2





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