Texas Instruments LMZ14201 SIMPLE SWITCHER Manual page 10

LMZ14201
SNVS649E – JANUARY 2010 – REVISED MARCH 2013
Unless otherwise specified, the following conditions apply: V
Tambient = 25 C for efficiency curves and waveforms.
Output Ripple
24V 3.3V
IN
Thermal Derating V
1.2
1
0.8
0.6
0.4
ÆJA = 19°C/W
0.2
VOUT = 3.3V
0
50 60 70
AMBIENT TEMPERATURE (C)
Current Limit 3.3V
2.4
2.3
2.2
2.1
2.0
1.9
25° C
1.8
0
10
INPUT VOLTAGE (V)
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Typical Performance Characteristics (continued)
1A, BW = 200 MHz
O
Figure 27.
= 3.3V
OUT
6V
IN
12V
IN
24V
IN
36V
IN
80 90 100 110 120
Figure 29.
@ 25°C
OUT
SHORT CIRCUIT
ONSET
30 50
20 40
Figure 31.
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= 24V; Cin = 10uF X7R Ceramic; C
IN
Transient Response
24V
IN
0.5 A/Div
20 mV/Div
Current Limit 1.8V
2.4
2.3
2.2
2.1
2.0
1.9
25° C
1.8
0
5
Current Limit 3.3V
2.5
2.4
2.3
2.2
2.1
2.0
85° C
1.9
0 10
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LMZ14201
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= 100uF X7R Ceramic;
O
3.3V 0.5A to 1A Step
O
200 Ps/Div
Figure 28.
@ 25°C
OUT
SHORT CIRCUIT
ONSET
10 15 20 25
INPUT VOLTAGE (V)
Figure 30.
@ 85°C
OUT
SHORT CIRCUIT
ONSET
20 30 40 50
INPUT VOLTAGE (V)
Figure 32.