Datasheet

0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 5V
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 5V
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 5V
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
VOUT = 0.8V
LM21305
SNVS639F –DECEMBER 2009–REVISED MARCH 2013 www.ti.com
Typical Performance Characteristics
Unless otherwise specified: V
IN
= 12V, V
OUT
= 3.3V, f
S
= 500 kHz, T
A
= 25°C, L = 3.3 µH, C
OUT
= 100 µF ceramic.
Efficiency with PVIN = AVIN = 5V, f
S
= 300 kHz Efficiency with PVIN = AVIN = 12V, f
S
= 300 kHz
Figure 2. Figure 3.
Efficiency with PVIN = AVIN = 5V, f
S
= 500 kHz Efficiency with PVIN = AVIN = 12V, f
S
= 500 kHz
Figure 4. Figure 5.
Efficiency with PVIN = AVIN = 5V, f
S
= 1 MHz Efficiency with PVIN = AVIN = 12V, f
S
= 1 MHz
Figure 6. Figure 7.
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