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YOBON TECHNOLOGIES
YOBON TECHNOLOGIES


YB1682

2A 380KHz 20V PWM Buck DC/DC Converter



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YB1682 pdf
YB1682
2A 380KHz 20V PWM Buck DC/DC Converter
Description
The YB1682 is a 380 KHz fixed frequency
monolithic step down switch mode
regulator with a built in internal Power
MOSFET. It achieves 2A continuous output
current over a wide input supply range with
excellent load and line regulation. The
device includes a voltage reference,
oscillation circuit, error amplifier, internal
PMOS and etc. The PWM control circuit is
able to adjust the duty ratio linearly from 0
to 100%. An enable function, an over
current protection function and a short
circuit protection function are built inside.
An internal compensation block is built in to
minimize external component count. The
YB1682 serves as ideal power supply units
for portable devices.
Typical Application Circuit
Features
„ 2A Constant Output Current
„ 140mRDSON Internal Power PMOSFET
Switch
„ Up to 92% Efficiency
„ Fixed 380KHz Frequency
„ Wide 3.6V to 20V Input Voltage Range
„ Output Adjustable from 1.222V to 18V
„ Output Current Protection
„ Built in Frequency Compensation
„ Built in Thermal Shutdown Function
„ Built in Current Limit Function
„ SOP8 Package is Available
„ The Minimum Dropout up to 0.3V
„ Pb-free Package
Applications
„ White LED Backlighting
„ Handheld PCs and PDAs
„ Mobile Phone
„ DSC and DV Flash Light Application
Pin Configuration
YB1682 Rev.1.0
Figure 1: Typical Application Circuit
www.yobon.com.tw
1



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YB1682 pdf
YB1682
2A 380KHz 20V PWM Buck DC/DC Converter
NC 1
8 NC
VIN 2
7 EN
SW 3
6 NC
GND 4
5 FB
SOP-8
Figure 2: Pin Configuration
Pin Description
Table 1
Pin
Name
1,6,8
NC
2 VIN
3 SW
4 GND
5 FB
7 EN
Not Connect.
Description
Supply Voltage Input Pin. YB1682 operates from a 3.6V to 20VDC
voltage.
Bypass VIN to GND with a suitably large capacitor to eliminate noise
on the input.
Power Switch Output Pin. SW is the switch node that supplies
power to the output.
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 YB1682.
Feedback Pin. Through an external resistor divider network, FB
senses the output voltage and regulates it. The feedback threshold
voltage is 1.222V.
Enable Pin. EN is a digital input that turns the regulator on or off.
Drive EN pin high to turn on the regulator, drive it low to turn it off.
Ordering Information
Order Number Package Type
YB1682SPX8P
SOP-8
Supplied As
2500 units Tape & Reel
Package Marking
Please contact sales
representative
YB1682 Rev.1.0
www.yobon.com.tw
2



Part Number YB1682
Description 2A 380KHz 20V PWM Buck DC/DC Converter
Maker YOBON TECHNOLOGIES - YOBON TECHNOLOGIES
Total Page 9 Pages
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