Datasheet

t (s) =
SS
V C
I
REF SS
SS
×
0.8V C (F)
0.73 A
SS
m
×
=
(1) where t
SS
(s) = soft-start time in seconds.
TPS742xx
SBVS064L –DECEMBER 2005–REVISED NOVEMBER 2010 www.ti.com
Table 1. Standard 1% Resistor Values for Programming the Output Voltage
(1)
R
1
(kΩ) R
2
(kΩ) V
OUT
(V)
Short Open 0.8
0.619 4.99 0.9
1.13 4.53 1.0
1.37 4.42 1.05
1.87 4.99 1.1
2.49 4.99 1.2
4.12 4.75 1.5
3.57 2.87 1.8
3.57 1.69 2.5
3.57 1.15 3.3
(1) V
OUT
= 0.8 × (1 + R1/R2)
Table 2. Standard Capacitor Values for Programming the Soft-Start Time
(1)
C
SS
SOFT-START TIME
Open 0.1ms
470pF 0.5ms
1000pF 1ms
4700pF 5ms
0.01mF 10ms
0.015mF 16ms
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