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TS3552 データシート(PDF) 3 Page - Taiwan Semiconductor Company, Ltd

部品番号 TS3552
部品情報  2A/350kHz Synchronous Buck DC/DC Converter
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メーカー  TSC [Taiwan Semiconductor Company, Ltd]
ホームページ  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS3552 データシート(HTML) 3 Page - Taiwan Semiconductor Company, Ltd

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TS3552
2A/350kHz Synchronous Buck DC/DC Converter
3/11
Version: B11
Block Diagram
Pin Function Description
Pin NO. Pin Name
Pin Description
1
BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel
MOSFET switch. Connect a 0.01µF or greater capacitor from SW to BS to power the
high side switch.
2
VIN
Power Input. IN supplies the power to the IC, as well as the step-down converter
switches. Drive IN with a 4.75V to 23V power source. Bypass IN to GND with a suitably
large capacitor to eliminate noise on the input to the IC. See Input Capacitor.
3
SW
Power Switching Output. SW is the switching node that supplies power to the output.
Connect the output LC filter from SW to the output load. Note that a capacitor is
required from SW to BS to power the high-side switch.
4
GND
Ground.
5
FB
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.925V. See
Setting the Output Voltage.
6
COMP
Compensation Node. COMP is used to compensate the regulation control loop.
Connect a series RC network from COMP to GND to compensate the regulation control
loop. In some cases, an additional capacitor from COMP to GND is required. See
Compensation Components.
7
EN
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn
on the regulator, drive it low to turn it off. Pull up with 100k
resistor for automatic
startup.
8
SS
Soft-Start Control Input. SS controls the soft start period. Connect a 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.


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