Datasheet
Table Of Contents
- FEATURES
- Applications
- DESCRIPTION
- Absolute Maximum Ratings
- Electrical Characteristics
- Typical Performance Characteristics
- Block Diagram
- Theory of Operation
- Application Hints
- SELECTING THE EXTERNAL CAPACITORS
- SELECTING THE OUTPUT CAPACITOR
- SELECTING THE INPUT CAPACITOR
- FEED-FORWARD COMPENSATION
- SELECTING DIODES
- LAYOUT HINTS
- SETTING THE OUTPUT VOLTAGE
- SWITCHING FREQUENCY
- DUTY CYCLE
- INDUCTANCE VALUE
- MAXIMUM SWITCH CURRENT
- CALCULATING LOAD CURRENT
- DESIGN PARAMETERS VSW AND ISW
- THERMAL CONSIDERATIONS
- MINIMUM INDUCTANCE
- INDUCTOR SUPPLIERS
- SHUTDOWN PIN OPERATION
- Application Hints
- Revision History

0 50
100
150
200
LOAD CURRENT (mA)
EFFICIENCY (%)
0
10
20
30
40
50
60
70
80
90
V
IN
=10V
0 50
100
150
200
0
10
20
30
40
50
60
70
80
90
100
V
IN
= 10V
LOAD CURRENT (mA)
EFFICIENCY (%)
0
50
100
150
200
250
300 350
0
10
20
30
40
50
60
70
80
90
100
V
IN
= 10V
V
IN
= 5V
LOAD CURRENT (mA)
EFFICIENCY (%)
0
100
200
300
400
500
600 700
0
10
20
30
40
50
60
70
80
90
100
V
IN
= 10V
V
IN
= 5V
V
IN
= 3.3V
LOAD CURRENT (mA)
EFFICIENCY (%)
0 50 100 150 200 250 300 350 400
0
10
20
30
40
50
60
70
80
90
100
V
IN
= 10V
V
IN
= 5V
LOAD CURRENT (mA)
EFFICIENCY (%)
LM2733
SNVS209E –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified: V
IN
= 5V, SHDN pin is tied to V
IN
.
Efficiency vs Load Current (V
OUT
= 20V) - "X" Efficiency vs Load Current (V
OUT
= 25V) - "X"
Figure 14. Figure 15.
Efficiency vs Load Current (V
OUT
= 30V) - "X" Efficiency vs Load Current (V
OUT
= 35V) - "X"
Figure 16. Figure 17.
Efficiency vs Load Current (V
OUT
= 40V) - "X" Efficiency vs Load (V
OUT
= 15V) - "Y"
Figure 18. Figure 19.
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