SC196ULTRT Semtech, SC196ULTRT Datasheet - Page 11

• Manufacturer Part Number: SC196ULTRT
• Description: IC SYNC BUCK CONV 1.5A 10-MLPD
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC196ULTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 5.5 V
• Current - Output: 1.5A
• Frequency - Switching: 1MHz
• Voltage - Input: 2.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MLPD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC196ULTR

PCB Layout Considerations
Poor layout can degrade the performance of the DC-DC
converter and can contribute to EMI problems, ground
bounce and resistive voltage losses. Poor regulation and
instability can result.
A few simple design rules can be implemented to ensure
good layout:
1.
© 2007 Semtech Corp.
POWER MANAGEMENT
Applications Information (Cont.)
Place the inductor and fi lter capacitors as close to the
device as possible and use short wide traces between
the power components.
SYNC/PWM
MODE
EN
GND
GND
V
IN
C
IN
SC196
R
11
FB2
2.
3.
4.
LX
Route the output voltage feedback path away from the
inductor and LX node to minimize noise and magnetic
interference. Keep R
to avoid noise pickup.
Maximize ground metal on the component side to
improve the return connection and thermal dissipation.
Separation between the LX node and GND should be
maintained to avoid coupling of switching noise to the
ground plane.
Use a ground plane with several vias connecting to
the component side ground to further reduce noise
interference on sensitive circuit nodes.
L
OUT
C
R
C
OUT
FB1
FB1
GND
V
FB1
OUT
and R
FB2
close to the ADJ pin
PRELIMINARY
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SC196