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| L1803G-SH2-R Datasheet, PDF (6/6 Pages) Unisonic Technologies – Programmable soft-start provides linear voltage startup | |||
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L1803
Preliminary
ï® TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
R3
VOUT
VIN
C1
VVCC
C3
IN
PG
VCC
EN
UTC
L1803
OUT
FB
SS
GND
R1 C2
R2
CSS
Table 1. Capacitor Values for Programming the Soft-Start Time (Note)
CSS
Open
270pF
560pF
2.7nF
5.6nF
Note: tSS (s) = 0.8 x CSS (F) / (4.4x10-7)
SOFT-START TIME
0.1ms
0.5ms
1ms
5ms
10ms
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 6
QW-R102-058.c
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