Datasheet

V (BOOST INPUT) = 5 V, V (BOOST OUTPUT) = 10 V,
SWITCHING FREQUENCY = 200 kHz, INDUCTOR = 1 µH,
R = 7.5 m , C = 440 µF, C = 660 µF
BAT IN
SENSE IN OUT
W
2 µs/DIV
3-A LOAD
5 A/DIV
100-mA LOAD
5 A/DIV
0 A
0 V
20 ms/DIV
V (BOOST INPUT)
BAT
5 V/DIV
V (BOOST OUTPUT)
IN
5 V/DIV
I
IND
10 A/DIV
V (BOOST OUTPUT) = 10 V, BuckA = 5 V AT 1.5 A,
BuckB = 3.3V AT 3.5A, SWITCHING FREQUENCY = 200 kHz,
INDUCTOR = 1 µH, R = 7.5 m , C = 440 µF, C = 660 µF
IN
SENSE IN
W
OUT
0V
0 A
0 V
20 ms/DIV
V (BOOST INPUT)
BAT
5 V/DIV
V BuckA AC-COUPLED
OUT
200 mV/DIV
V BuckB AC-COUPLED
OUT
200 mV/DIV
I
IND
10 A/DIV
V (BOOST OUTPUT) = 10 V, BuckA = 5 V AT 1.5 A,
BuckB = 3.3 V AT 3.5 A, SWITCHING FREQUENCY = 200 kHz,
INDUCTOR = 1 µH, R = 7.5 m , C = 440 µF, C = 660 µF
IN
SENSE IN OUT
W
Output Current (A)
Efficiency (%)
V (BOOST OUTPUT) = 10 V, SWITCHING FREQUENCY = 200 kHz,
INDUCTOR = 1 µH, R = 7.5 m
IN
SENSE
W
0.01
1
10
0
10
20
30
40
50
60
70
80
90
100
V = 8 V
BAT
V = 5 V
BAT
V = 3 V
BAT
V
BAT
(BOOST INPUT) = 5 V, V
IN
(BOOST OUTPUT) = 10 V,
SWITCHING FREQUENCY = 200 KHz, INDUCTOR = 680 nH,
R
SENSE
= 10 m, C
IN
= 440 F, C
OUT
= 660 F
TPS43330-Q1
TPS43332-Q1
SLVSA82E –MARCH 2011–REVISED APRIL 2013 www.ti.com
TYPICAL CHARACTERISTICS (continued)
LOAD STEP RESPONSE (BOOST)
EFFICIENCY ACROSS OUTPUT CURRENTS (BOOST) (0 TO 5 A AT 10 A/µs)
Figure 9. Figure 10.
CRANKING-PULSE BOOST RESPONSE CRANKING-PULSE BOOST RESPONSE
(12 V TO 3 V IN 1 ms AT BUCK OUTPUTS 7.5 AND 11.5 W) (12 V TO 4 V IN 1 ms AT BOOST DIRECT OUTPUT 25 W)
Figure 11. Figure 12.
INDUCTOR CURRENTS (BOOST)
Figure 13.
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