LM2841, LM2842
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SNVS540H –MARCH 2009–REVISED APRIL 2013
Typical Performance Characteristics
Efficiency vs. Load Current (LM2842X, VOUT = 3.3V)
Efficiency vs. Load Current (LM2841X, VOUT = 3.3V)
100
80
60
40
20
0
100
V
= 12V
= 24V
IN
V
IN
= 12V
80
60
40
20
0
V
IN
= 36V
V
IN
= 36V
V
IN
V
IN
= 24V
0.0
0.1
0.2
0.3
0.0
0.1
0.2
0.3 0.4
0.5
0.6
LOAD CURRENT (A)
LOAD CURRENT (A)
Figure 2.
Figure 3.
Efficiency vs. Load Current (LM2840X, VOUT = 8V)
Switching Frequency vs. Temperature (X version)
100
VIN = 12V
90
80
VIN = 24V
70
60
50
40
30
20
10
0
0
20
40
60
80
100
120
LOAD CURRENT (mA)
Figure 4.
Figure 5.
Switch Current Limit vs. SHDN Pin Voltage
(Soft-start Implementation, LM2840/41)
Input UVLO Voltage vs. Temperature
800
600
400
200
0
1.0
1.6
2.2
2.8
3.4
4.0
SHDN PIN VOLTAGE (V)
Figure 6.
Figure 7.
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