LM3526MX-H/NOPB National Semiconductor, LM3526MX-H/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM3526MX-H/NOPB
• Description: IC POWER SW USB DUAL PORT 8-SOIC
• Manufacturer: National Semiconductor
• Type: USB Switchr

Specifications of LM3526MX-H/NOPB

• Number Of Outputs: 2
• Rds (on): 140 mOhm
• Internal Switch(s): Yes
• Current Limit: 1.2A
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM3526MX-H; *LM3526MX-H/NOPB; LM3526MX-H

Application Information
PCB LAYOUT CONSIDERATIONS
In order to meet the USB requirements for voltage drop,
droop and EMI, each component used in this circuit must be
evaluated for its contribution to the circuit performance. The
PCB layout rules and guidelines must be followed.
• Place the switch as close to the USB connector as pos-
sible. Keep all V
least 50-mil, 1 ounce copper for all V
bus
traces as short as possible and use at
FIGURE 2. Self-Powered Hub Per-Port Voltage Drop
bus
(Continued)
traces. Solder
9
• Avoid vias as much as possible. If vias are used, use
• Place the output capacitor and ferrite beads as close to
• If ferrite beads are used, use wires with minimum resis-
plating the traces will reduce the trace resistance.
multiple vias in parallel and/or make them as large as
possible.
the USB connector as possible.
tance and large solder pads to minimize connection
resistance.
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