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
ENC (10 V/div)
V
OUT1
(2 V/div)
PGOOD (5 V/div)
DRVL1 (5 V/div)
ENC (10 V/div)
V
OUT2
(2 V/div)
PGOOD (5 V/div)
DRVL2 (5 V/div)
V
OUT1
(200mV/div)
VREG5 (200mV/div)
V
OUT2
(200mV/div)
VREG3 (200mV/div)
TPS51123
SLUS890E –DECEMBER 2008–REVISED JANUARY 2013
www.ti.com
TYPICAL CHARACTERISTICS (continued)
5-V Switchover Waveforms 3.3-V Switchover Waveforms
Figure 32. Figure 33.
5-V Soft-stop Waveforms 3.3-V Soft-stop Waveforms
Figure 34. Figure 35.
18 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated
Product Folder Links: TPS51123