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V
I
− Input Voltage − V
0
100
200
300
400
500
600
700
800
900
1000
1100
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
I
O
− Output Current − mA
G003
T
A
= 25°
T
A
= 125°
I
O
− Output Current − mA
50
55
60
65
70
75
80
85
100 150 200 250 300 350 400 450 500 550 600
Efficiency − %
G004
SCR: 11, V
(driver)
= 11 V
SCR: 10, V
(driver)
= 11 V
SCR: 01, V
(driver)
= 11 V
SCR: 00, V
(driver)
= 11 V
SCR: 11, V
(driver)
= 17 V
SCR: 10, V
(driver)
= 17 V
SCR: 01, V
(driver)
= 17 V
SCR: 00, V
(driver)
= 17 V
TPIC74100-Q1
BUCK/BOOST SWITCH-MODE REGULATOR
SLIS125 – DECEMBER 2006
TYPICAL CHARACTERISTICS (continued)
NOTES:
(1) Typical representation of input voltage vs output load current at T
A
= 25°C and 125°C, after the correct power-up sequence is
invoked.
(2) The dip in the output current at 5.8 V is caused by the buck/boost transition of the IC.
(3) The output current is clipped to 1 A by the measurement setup.
Figure 5. Typical Input Voltage (V
(driver)
)
vs
Maximum Output Load Current (I
O
)
NOTE: The average converter efficiency with four different slew rate controls (SCRx) on the Q1 switching FET with input voltage
V
(driver)
= 11 V and 17 V, T
A
= 125°C.
Figure 6. Converter Efficiency
14
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