Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- ELECTRICAL CHARACTERISTICS
- DEVICE INFORMATION
- TYPICAL CHARACTERISTICS
- OVERVIEW
- DETAILED DESCRIPTION
- Fixed Frequency PWM Control
- Slope Compensation Output Current
- Pulse Skip Eco-Mode
- Low Dropout Operation and Bootstrap Voltage (BOOT)
- Error Amplifier
- Voltage Reference
- Adjusting the Output Voltage
- Enable and Adjusting Undervoltage Lockout
- Slow Start/Tracking Pin (SS/TR)
- Overload Recovery Circuit
- Sequencing
- Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- Overcurrent Protection and Frequency Shift
- Selecting the Switching Frequency
- How to Interface to RT/CLK Pin
- Power Good (PWRGD Pin)
- Overvoltage Transient Protection
- Thermal Shutdown
- Small Signal Model for Loop Response
- Simple Small Signal Model for Peak Current Mode Control
- Small Signal Model for Frequency Compensation
- APPLICATION INFORMATION
- Design Guide — Step-By-Step Design Procedure
- Selecting the Switching Frequency
- Output Inductor Selection (LO)
- Output Capacitor
- Catch Diode
- Input Capacitor
- Slow Start Capacitor
- Bootstrap Capacitor Selection
- Under Voltage Lock Out Set Point
- Output Voltage and Feedback Resistors Selection
- Compensation
- Discontinuous Mode and Eco Mode Boundary
- APPLICATION CURVES
- Power Dissipation Estimate
- Layout
- Revision History

10
20
30
40
-50 -25 0 25 50 75 100 125 150
gm- A/Vm
T -JunctionTemperature-°C
J
V =12V
I
50
70
90
110
130
150
-50 -25 0 25 50 75 100 125 150
gm- A/Vm
T -JunctionTemperature-°C
J
V =12V
I
1.10
1.20
1.30
1.40
-50
-25 0 25 50
75
100
125
150
EN-Threshold-V
T -JunctionTemperature-°C
J
V =12V
I
-4.25
-4
-3.75
-3.5
-3.25
-50 -25 0 25 50 75 100 125 150
I - A
(EN)
m
T -JunctionTemperature-°C
J
V =12V,
V = Threshold+50mV
I
I(EN)
-1
-0.95
-0.9
-0.85
-0.8
-50 -25
0
25
50 75 100
125
150
I - A
(EN)
m
T -JunctionTemperature-°C
J
V =12V,
V = Threshold-50mV
I
I(EN)
-3
-2.5
-2
-1.5
-1
-50 -25 0 25 50 75 100 125 150
I - A
(SS/TR)
m
T -JunctionTemperature-°C
J
V =12V
I
TPS54060
SLVS919A –JANUARY 2009–REVISED JULY 2010
www.ti.com
TYPICAL CHARACTERISTICS (continued)
EA TRANSCONDUCTANCE DURING SLOW START vs
JUNCTION TEMPERATURE EA TRANSCONDUCTANCE vs JUNCTION TEMPERATURE
Figure 7. Figure 8.
EN PIN VOLTAGE vs JUNCTION TEMPERATURE EN PIN CURRENT vs JUNCTION TEMPERATURE
Figure 9. Figure 10.
EN PIN CURRENT vs JUNCTION TEMPERATURE SS/TR CHARGE CURRENT vs JUNCTION TEMPERATURE
Figure 11. Figure 12.
8 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54060