Datasheet

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