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Xlsemi |
3.5A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Datasheet
XL2010
Features
n Wide 8V to 36V Input Voltage Range
n Output Adjustable from 1.25V to 32V
n Maximum Duty Cycle 100%
n Minimum Drop Out 0.3V
n Fixed 180KHz Switching Frequency
n Maximum 3.5A Switching Current
n Internal Optimize Power MOSFET
n High efficiency
n Excellent line and load regulation
n With output constant current loop
n Built in thermal shutdown function
n Built in current limit function
n Built in output short protection function
n SOP8-EP package
Applications
n Car Charger
n Battery Charger
n LCD Monitor and LCD TV
n Portable instrument power supply
n Telecom / Networking Equipment
General Description
The XL2010 is a 180 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 3.5A 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 over
current protection function is built inside.
When short protection function happens, the
operation frequency will be reduced from
180KHz to 48KHz. An internal compensation
block is built in to minimize external
component count.
Rev 1.1
Figure1. Package Type of XL2010
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1
3.5A 180KHz 36V Buck DC to DC Converter With CV/CC Loop
Datasheet
XL2010
Pin Configurations
The Exposed PAD is SW
Figure2. Pin Configuration of XL2010 (Top View)
Table 1 Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
NC
SW
GND
FB
EN
OCSET
VC
VIN
Description
No Connected.
Power Switch Output Pin (SW). SW is the switch node that
supplies power to the output.
(Note: Connected the back exposed PAD to SW.)
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 XL2010.
Feedback Pin (FB). Through an external resistor divider
network, FB senses the output voltage and regulates it. The
feedback threshold voltage is 1.25V.
Enable Pin. Drive EN pin low to turn off the device, drive it
high to turn it on.
Output Constant Current Set Pin.
Internal Voltage Regulator Bypass Capacity. In typical system
application, The VC pin connect a 1uf capacity to VIN.
Supply Voltage Input Pin. XL2010 operates from a 8V to 36V
DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input.
Rev 1.1
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2
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