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YOBON TECHNOLOGIES
YOBON TECHNOLOGIES


YB1693

3A Synchronous Step-Down Converter



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YB1693 pdf
YB1693
3A Synchronous Step-Down Converter
Description
The YB1693 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 23V.
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
3A Output Current
Wide 4.75V to 23V Operating Input
Range
Integrated 100mPower MOSFET
Switches
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output
Capaci- tors
Fixed 450KHz 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
YB1693 Rev.1.1
Figure1 Typical Application Circuit
www.yobon.com.tw
1



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Pin Configuration
YB1693
3A Synchronous Step-Down Converter
SOP-8(Exposed Pad)
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. YB1693 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
YB1693PSP8
SOP-8
(Exposed Pad)
Supplied As
2500 units
Tape & Reel
Package Marking
YB1693
YB1693 Rev.1.1
www.yobon.com.tw
2



Part Number YB1693
Description 3A Synchronous Step-Down Converter
Maker YOBON TECHNOLOGIES - YOBON TECHNOLOGIES
Total Page 10 Pages
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