SG7900A/SG7900 SERIES
CHARACTERISTIC CURVES
(continued)
NEGATIVE REGULATOR
FIGURE 4.
SHORTCIRCUIT CURRENT VS. V
IN
FIGURE 5.
QUIESCENT CURRENT VS. V
IN
FIGURE 6.
SHORT CIRCUIT CURRENT VS. V
IN
FIGURE 7.
DROPOUT CHARACTERISTICS
FIGURE 8.
RIPPLE REJECTION VS. FREQUENCY
APPLICATIONS
FIGURE 9 - FIXED OUTPUT REGULATOR
FIGURE 10 - CIRCUIT FOR INCREASING OUTPUT VOLTAGE
NOTE: 1. C1 is required only if regulator is separated from rectifier filter.
2. Both C1 and C2 should be low E.S.R. types such as solid
tantalum. If aluminum electrolytics are used, at least 10 times
values shown should be selected.
3. If large output capacities are used, the regulators must be
protected from momentary input shorts. A high current diode
NOTE: C3 optional for improved transient response and ripple rejec
V
OUT
= V (REGULATOR)
R
1
+ R
2
R
1
R
2
=
V(REG)
15mA
05/01 Rev 1.5
Copyright
1999
3
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∞
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INFINITY
Microelectronics Inc.
MICRO-ELECTRONICS [ Micro Electronics ]
