Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- DISSIPATION RATINGS
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- DEVICE INFORMATION
- TYPICAL CHARACTERISTICS
- APPLICATION INFORMATION
- PWM Operations
- Adaptive On-Time Control and PWM Frequency
- Loop Compensation
- Ramp Signal
- Light Load Condition in Auto-Skip Operation
- Out-of-Audio™ Light-Load Operation
- Enable and Soft Start
- VREG5/VREG3 Linear Regulators
- VREG5 Switch Over
- VREG3 Switch Over
- Powergood
- Output Discharge Control
- Low-Side Driver
- High-Side Driver
- Current Protection
- Overvoltage and Undervoltage Protection
- UVLO Protection
- Thermal Shutdown
- External Parts Selection
- Layout Considerations
- Application Circuit
- Revision History

VREG5 OUTPUT VOLTAGE
vs
OUTPUT CURRENT
4.90
4.95
5.00
5.05
0 20 40 60 80 100
I
VREG5
- VREG5 Output Current - mA
V
VREG5
- VREG5 Output Voltage - V
VREG3 OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.2
3.25
3.3
3.35
0 20 40 60 80 100
I
VREG3
- VREG3 Output Current - mA
VVREG3 - VREG3 Output Voltage - V
SWITCHINGFREQUENCY
vs
OUTPUTCURRENT
0
100
200
300
400
500
0.001 0.01 0.1 1 10
I
OUT
-OutputCurrent- A
f
SW
- Swithching Frequency - kHz
TONSEL =5V
CH2 Auto-skip
CH2OOA
CH2PWMOnly
CH1PWMOnly
CH1 Auto-skip
CH1OOA
OVP/UVP THRESHOLD VOLTAGE
vs
JUNCTION TEMPERATURE
40
50
60
70
80
90
100
110
120
130
140
150
-50 0 50 100 150
T
J
- Junction Temperature - °C
V
OVP/VUVP
- OVP/UVP Threshold - %
TPS51123
SLUS890E –DECEMBER 2008–REVISED JANUARY 2013
www.ti.com
TYPICAL CHARACTERISTICS (continued)
Figure 17. Figure 18.
Figure 19. Figure 20.
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