LM25007MMX Datasheet, PDF (6/19 Pages) Texas Instruments – LM25007 42V, 0.5A Step-Down Switching Regulator

LM25007
SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013
Typical Performance Characteristics
Operational Waveforms
Operational Waveforms
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LM25007 Operation: V_OUT = 10V, V_IN = 20V, I_OUT = 250mA
CH1: Switch Node, CH2: V_OUT (AC), CH4: Inductor Current
Figure 1.
LM25007 Operation: V_OUT = 10V, V_IN = 42V, I_OUT = 250mA
CH1: Switch Node, CH2: V_OUT (AC), CH4: Inductor Current
Figure 2.
LM25007 10V Output Efficiency
100
V_IN = 15V
90
30V
42V
80
70
0
100 200 300 400 500
LOAD CURRENT (mA)
Figure 3.
Current Limit Off-Time
vs V_FB
20
18
16
600k
14
400k _200k
12
10
8
6
4
2 _100k
50k
0
0
0.5
1
1.5
2
2.5
VFB (V)
Figure 4.
10000
V_IN
vs T_ON
R_ON = 100k, 200k, 300k
1000
R_ON = 300k
100k
200k
6
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100
0
10
20
30
42
INPUT VOLTAGE V_IN (V)
Figure 5.
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