TPS70745 Datasheet, PDF (17/34 Pages) Texas Instruments – DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

TPS70745, TPS70748, TPS70751, TPS70758, TPS70702
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS
SLVS291 – MAY 2000
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
TIME (START-UP)
3
VO = 3.3 V
CO = 33 µF
IO = 250 mA
2 ^VOUT1
SEQ = Low
1
0
5
0
–5
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
t – Time – ms
Figure 29
OUTPUT VOLTAGE
vs
TIME (START-UP)
VO = 1.8 V
2 _{CO = 33 µF}
IO = 125 mA
1 ^VOUT2
SEQ = High
0
–1
5
0
–5
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
t – Time – ms
Figure 30
VI
IN
OUT
EN
GND
To Load
+
CO
ESR
R
RL
Figure 31. Test Circuit for Typical Regions of Stability
† _{Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added}
externally, and PWB trace resistance to CO.
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