sc900imltrt Semtech Corporation, sc900imltrt Datasheet - Page 12

• Manufacturer Part Number: sc900imltrt
• Description: Sc900 Programmable Penta Uldo With Reset And I2c Interface
• Manufacturer: Semtech Corporation

Layout Considerations
Layout is straightforward if you use the Gerber files on
page 21 as a reference. Notice that the input voltage
feed to the SC900 is on the bottom of the board and
vias connect this voltage track to the top of the board
and then to the SC900 itself. The input bypass can be
one 4.7µF capacitor, two 3.3µF capacitors, three 2.2µF
capacitors or five 1µF capacitors. The determining fac-
tor is how much copper is available on the input voltage
feed track and how much room is available. If the input
Notes:
Digital outputs are powered from INB, additionally LDOB must be on for operation of LDOPGD and ARST.
SC900 Slave Address:
LDO Reset Control Logic Table (Defaults are in Bold)
LDO Reset Control Logic Table (Defaults are in Bold)
Applications Information (Cont.)
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placed very close to the input pins of the SC900. If the
input track is fairly thick, then you can use a single 4.7µF
capacitor at the beginning of the voltage feed track since
a wider track has less inductance per inch. The
SC900EVB has five 1µF capacitors, but these can be
replaced with one 4.7µF in place of C1 and opens in
place of C9, C14, C15, and C16 (see page 20 for de-
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