Xlsemi XL2005 User manual

Shanghai Xinlong Semiconductor Co,.Ltd www.xlsemi.com
Rev1.4 1
XL2005 DEMO Board manual
Introduction
Demonstration circuit XL2005 in a 160KHz BUCK converter circuit ,designed for 5V/1.5A output from a
8V to 32V input .
The XL2005 operates over an input range of 8V to 32V, suitable for car charger ,battery charger .Output
current up to 2A,efficiency up to 92%,with output constant voltage and constant current control
loop ,design with very low parts count.
This document contains the converter specification, schematic, PCB diagram, bill of materials.
Schematic
XL2005 VIN=8V~32V, VOUT=5V, IOUT=1.5A Typical Application Circuit
Pin Description
Pin Number Pin Name Description
1 FB
Feedback Pin (FB). Through an external resistor divider network,
Feedback senses the output voltage and regulates it. The feedback
threshold voltage is 0.8V.
2 EN
Enable Pin. Drive EN pin low to turn off the device, drive it high to turn it
on.
3 OCSET Output Constant Current Set Pin.
4 VIN
Supply Voltage Input Pin. XL2005 operates from a 8V to 32V DC
voltage. Bypass Vin to GND with a suitably large capacitor to eliminate
noise on the input.
5,6 SW
Power Switch Output Pin (SW). Output is the switch node that supplies
power to the output.
7,8 GND
Ground Pin.

Shanghai Xinlong Semiconductor Co,.Ltd www.xlsemi.com
Rev1.4 2
Bill of Materials
Qty Ref
Des Description Mfg Part Number Mfg
1 C1 1uF,50V,Ceamic,X7R,0805 C2012X7R1H105K TDK
1 C2 1uF,50V,Ceamic,X7R,0805 C2012X7R1H105K TDK
1 CIN 100uF,35V, Electrolytic,(6.3x11) ZS1A107K6L007 Samwha
1 COUT 220uF,16V, Electrolytic,(6.3x11) ZS1A227K6L007 Samwha
1 D1 40V,3A,SMA,Schottky Barrier Rectifier SS34 Fairchild
1 D3 LED,Blue,0805
1 L1 47uH,2A,(10*4)
1 R1 3KΩ,1%,1/10W,Thick Film,0603 RC0603XR-073001 Yageo
1 R2 16KΩ,1%,1/10W,Thick Film,0603 RC0603XR-071602 Yageo
1 R3 1KΩ,1%,1/10W,Thick Film,0603 RC0603XR-071001 Yageo
1 R4 75KΩ,1%,1/10W,Thick Film,0603 RC0603XR-077502 Yageo
1 R5 49.9KΩ,1%,1/10W,Thick Film,0603 RC0603XR-074992 Yageo
1 R6 43.2KΩ,1%,1/10W,Thick Film,0603 RC0603XR-074322 Yageo
1 R7 49.9KΩ,1%,1/10W,Thick Film,0603 RC0603XR-074992 Yageo
1 RCS 30KΩ,1%,1/10W,Thick Film,0603 RC0603XR-073002 Yageo
1 U1 Xlsemi,XL2005,SOP8 XL2005 XLSEMI
1 USB DIP
Component Selection Table
Application CIN L1 D1 R1 R2 COUT RCS
5V/1A 100µF/35V 47µH/2A SS34 3K 16K 220µF/16V 16K
5V1.5A 100µF/35V 47µH/2A SS34 3K 16K 220µF/16V 30K
Performance Data
Efficiency VS Load current IC surface temperature VS Load current

Shanghai Xinlong Semiconductor Co,.Ltd www.xlsemi.com
Rev1.4 3
Populated Circuit Board Phtograph
PCBLayout
28mm
Top side
Bottom side
14mm

Shanghai Xinlong Semiconductor Co,.Ltd www.xlsemi.com
Rev1.4 4
Note
1. Keep feedback wiring away from inductor and schottky.
2. VIN,SW lines must be short and ground plane construction for best results.
3. Input capacitor as close as possible with the XL2005.