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YOBON TECHNOLOGIES
YOBON TECHNOLOGIES


YB1692

2A Synchronous Step-Down Converter


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YB1692 pdf
YB1692
2A Synchronous Step-Down Converter
Description
The YB1692 is a monolithic synchronous
buck regulator. The device integrates
130mMOSFETS that provide 2A
continuous load cur- rent over a wide
operating input voltage of 4.75V to 18V.
Current mode control provides fast
transient response and cycle-by-cycle cur-
rent limit.
An adjustable soft-start prevents inrush
current at turn-on. In shutdown mode, the
supply cur- rent drops below 1μA.
This device, available in an 8-pin SOP
pack- age, provides a very compact system
solution with minimal reliance on external
components.
Features
„ 2A Output Current
„ Wide 4.75V to 18V Operating Input
Range
„ Integrated 130mPower MOSFET
Switches
„ Output Adjustable from 0.923V to 15V
„ Up to 93% Efficiency
„ Programmable Soft-Start
„ Stable with Low ESR Ceramic Output
Capaci- tors
„ Fixed 340KHz Frequency
„ Cycle-by-Cycle Over Current
Protection
„ Input Under Voltage Lockout
„ Thermally Enhanced 8-Pin SOP
Package
Applications
„ Distributed Power Systems
„ Networking Systems
„ FPGA, DSP, ASIC Power Supplies
„ Green Electronics/ Appliances
„ Notebook Computers
Typical Application Circuit
YB1692 Rev.1.0
Figure1 Typical Application Circuit
www.yobon.com.tw
1



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Pin Configuration
YB1692
2A Synchronous Step-Down Converter
SOP-8
Figure 2 Pin Configuration
Pin Description
Table 1
Pin Name
Description
High-Side Gate Drive Boost Input. BS supplies the drive for the
1 BS high-side N-Channel MOSFET switch. Connect a 0.01μF or greater
capacitor from SW to BS to power the high side switch.
Supply Voltage Input Pin. YB1692 operates from a 4.75V to 18VDC
2
VIN
voltage.
Bypass VIN to GND with a suitably large capacitor to eliminate noise
on the input.
3
SW
Power Switch Output Pin. SW is the switch node that supplies power
to the output.
4 GND Ground Pin.
Feedback Pin. Through an external resistor divider network,
5 FB FBsenses the output voltage and regulates it. The feedback threshold
voltage is 0.923V
Compensation Node. COMP is used to compensate the regulation
control loop. Connect a series RC network from COMP to GND to
6 COMP compensate the regulation control loop. In some cases, an additional
capacitor from COMP to GND is required. See Compensation
Components.
7
EN
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.
Soft-Start Control Input. SS controls the soft-start period. Connect a
8
SS
capacitor from SS to GND to set the soft-start period. A 0.1μF
capacitor sets the soft-start period to 15ms. To disable the soft-start
feature, leave SS unconnected.
Ordering Information
Order Number
Package Type
YB1692SPX8
SOP-8
Supplied As
2500 units
Tape & Reel
Package Marking
YB1692
YB1692 Rev.1.0
www.yobon.com.tw
2



Part Number YB1692
Description 2A Synchronous Step-Down Converter
Maker YOBON TECHNOLOGIES - YOBON TECHNOLOGIES
Total Page 10 Pages
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