Datasheet

50 µs/DIV
V AC-COUPLED
OUT
100 mV/DIV
I
IND
2 A/DIV
V = 12 V, V = 5 V, SWITCHING FREQUENCY = 400 kHz
INDUCTOR = 4.7 µH, R = 10 m
IN OUT
SENSE
W
V = 12 V, V = 5 V, SWITCHING FREQUENCY = 400 kHz
INDUCTOR = 4.7 µH, R = 10 m
IN OUT
SENSE
W
50 µs/DIV
V AC-COUPLED
OUT
100 mV/DIV
I
IND
2 A/DIV
50 µs/DIV
V AC-COUPLED
OUT
I
IND
2 A/DIV
100 mV/DIV
V = 12 V, V = 5 V, SWITCHING FREQUENCY = 400 kHz
INDUCTOR = 4.7 µH, R = 10 m
IN OUT
SENSE
W
2 ms/DIV
V
OUTA
V
OUTB
1 V/DIV
OUTPUT CURRENT (A)
EFFICIENCY (%)
POWER LOSS (mW)
EFFICIENCY,
SYNC = LOW
POWER LOSS,
SYNC = HIGH
POWER LOSS,
SYNC = LOW
EFFICIENCY,
SYNC = HIGH
V = 12 V, V = 5 V, SWITCHING FREQUENCY = 400 kHz
INDUCTOR = 4.7 µH, R = 10 m
IN OUT
SENSE
W
0.0001 0.001 0.01 0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
10000
2 µs/DIV
FORCED CONTINUOUS MODE (SYNC = 1), 200-mA LOAD
DISCONTINUOUS MODE (SYNC = 0), 200-mA LOAD
LOW-POWER MODE (SYNC = 0), 20-mA LOAD
V = 12 V, V = 5 V, SWITCHING FREQUENCY = 400 kHz
INDUCTOR = 4.7 µH, R = 10 m
IN OUT
SENSE
W
1 A/DIV
1 A/DIV
1 A/DIV
TPS43330-Q1
TPS43332-Q1
www.ti.com SLVSA82E –MARCH 2011–REVISED APRIL 2013
TYPICAL CHARACTERISTICS
EFFICIENCY ACROSS OUTPUT CURRENTS (BUCKS) INDUCTOR CURRENTS (BUCK)
Figure 3. Figure 4.
BUCK LOAD STEP: FORCED CONTINUOUS MODE
(0 TO 4 A AT 2.5 A/µs) SOFT-START OUTPUTS (BUCK)
Figure 5. Figure 6.
BUCK LOAD STEP: LOW-POWER-MODE ENTRY BUCK LOAD STEP: LOW-POWER-MODE EXIT
(4 A TO 90 mA AT 2.5 A/µs) (90 mA TO 4 A AT 2.5 A/µs)
Figure 7. Figure 8.
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