isl97652 Intersil Corporation, isl97652 Datasheet - Page 24

• Manufacturer Part Number: isl97652
• Description: 4-channel Integrated Lcd Supply With Dual Vcom Amplifiers
• Manufacturer: Intersil Corporation

ISL97652
1). Cout, Cin, CB: get these components as close to
PGND1,2,3 as possible and use wide tracks on the top
PGND layer with no vias.
2). L1, D1, L2, D5: get these components as close to the
chip pins as possible (having observed 1/) and use wide
tracks on the top PGND layer with no vias.
3). Feedback resistor networks connected to FB, FBB, FBP,
FBN, POS1,2: keep tracks as short as possible (having first
observed 1/ and 2/). Routing on the SGND layer should be
used. Avoid routing this tracks under switching tracks on the
top surface.
4). All other components: keep all switching output tracks
(SW1,2, SWB1,2, CBOOT, DRVP, DRVN, VGHM, VFLK) on
the PGND layer shielded from adjacent tracks.
Evaluation PCB
A two layer evaluation PCB is available which follows the
above procedure and may be useful as a reference to guide
the PCB layout engineer. For example, the smoothing
capacitor positive rail to PVin does contain vias in series;
however, a small capacitor has been used directly at the
PVin pins which overcomes the ESR objection.
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Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
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FN9287.1
November 2, 2007