TPS51123A Datasheet, PDF (14/36 Pages) Texas Instruments – Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power

TPS51123A
SLUSAA6B – APRIL 2011 – REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
SWITCHING FREQUENCY
vs
OUTPUT CURRENT
500
TONSEL = 5V
CH2 PWM Only
400
CH1 PWM Only
300
200
CH2 Auto-skip
100
CH2 OOA
CH1 OOA
CH1 Auto-skip
0
0.001
0.01
0.1
1
10
I_OUT - Output Current - A
150
140
130
120
110
100
90
80
70
60
50
40
-50
OVP/UVP THRESHOLD VOLTAGE
vs
JUNCTION TEMPERATURE
0
50
100
T_J - Junction Temperature - °C
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150
Figure 17.
VREG5 OUTPUT VOLTAGE
vs
OUTPUT CURRENT
5.05
Figure 18.
VREG3 OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.35
5.00
3.3
4.95
3.25
4.90
0
20
40
60
80
100
I_VREG5 - VREG5 Output Current - m A
Figure 19.
3.2
0
20
40
60
80
100
I_VREG3 - VREG3 Output Current - m A
Figure 20.
14
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