HT77S10 datasheet(9/16 Pages) HOLTEK

Part #	HT77S10

Description	High Efficiency Synchronous Step-Up DC/DC Converter

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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9 / 16 page

HT77S10/HT77S11

Rev. 1.00

February 3, 2010

Layout Guidelines

Good PCB layout is an extremely important factor is en-

suring the optimum performance from switching regula-

tor converters. Poorly thought out circuit layout can

result in related noise problems. In order to minimise

both EMI and switching noise, the follow guidelines

should be followed:

· All tracks should be as short and wide as possible

· All components must be located as close to the IC as

possible

· A star ground connection should be used to connect

the input capacitor, C1, output capacitors, C3 and C4,

and the IC GND pin

· Feedback resistors must be kept close as close to the

FB pin as possible to limit the possibility of noise injec-

tion onto the PCB track connected to the FB pin

· A full ground plane will do much to enhance EMI per-

formance

A demo board schematic and layout is provided for con-

sultation below:

HT77S10 Datasheet(PDF) 9 Page - Holtek Semiconductor Inc