LM3489_15 Datasheet, PDF (5/25 Pages) Texas Instruments – Hysteretic PFET Buck Controller With Enable Pin

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LM3489
LM3489-Q1
SNVS443B – MAY 2006 – REVISED FEBRUARY 2013
Typical Performance Characteristics
All curves taken at VIN = 12V with configuration in Design Information. T_J = 25°C, unless otherwise specified.
Quiescent Current vs Input Voltage
500
Shutdown Current vs Input Voltage
15
V_FB = 1.5V, V_EN = 5.5V
400
300
200
-40°C
25°C
125°C
V_FB = 1.5V, V_EN = 5.5V
12
-40°C
9
25°C
6
125°C
100
3
0
0
10
20
30
40
V_IN (V)
Figure 2.
Feedback Voltage vs Temperature
1.264
I_OUT = 200 mA
1.254
18V
1.244
35V
1.234
1.224
12V
4.5V
0
0
10
20
30
40
V_IN (V)
Figure 3.
Feedback Voltage Hysteresis vs Input Voltage
16
I_OUT = 0
T_J = 25°C
14
10
6
1.214
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Figure 4.
Feedback Voltage Hysteresis vs Temperature
18
I_OUT = 0
V_IN = 12V
14
10
6
2
0
10
20
30
40
V_IN (V)
Figure 5.
Current Limit ADJ Current vs Temperature
6.5
V_FB = 1.5V
6
4.5V
5.5
35V
18V
5
2
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Figure 6.
4.5
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Figure 7.
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