SG7900A/SG7900 SERIES
NEGATIVE REGULATOR
CHARACTERISTIC CURVES (continued)
FIGURE 6.
SHORT CIRCUIT CURRENT VS. VIN
FIGURE 4.
SHORTCIRCUIT CURRENT VS. VIN
FIGURE 5.
QUIESCENT CURRENT VS. VIN
FIGURE 7.
DROPOUT CHARACTERISTICS
FIGURE 8.
RIPPLE REJECTION VS. FREQUENCY
APPLICATIONS
FIGURE 10 - CIRCUIT FOR INCREASING OUTPUT VOLTAGE
FIGURE 9 - FIXED OUTPUT REGULATOR
NOTE: 1. C1isrequiredonlyifregulatorisseparatedfromrectifierfilter.
2. Both C1 and C2 should be low E.S.R. types such as solid
tantalum. Ifaluminumelectrolyticsareused,atleast10times
values shown should be selected.
NOTE: C3 optional for improved transient response and ripple rejec
R1 + R2
R1
V(REG)
15mA
VOUT = V (REGULATOR)
R2 =
3. If large output capacities are used, the regulators must be
protectedfrommomentaryinputshorts. Ahighcurrentdiode
05/01 Rev 1.5
LINFINITY Microelectronics Inc.
11861 Western Avenue ∞ Garden Grove, CA 92841
Copyright 1999
3
(714) 898-8121 ∞ FAX: (714) 893-2570
MICRO-ELECTRONICS [ Micro Electronics ]
