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ELECTRICAL CHARACTERISTICS
ELECTRICAL PERFORMANCE CURVES
ELECTRICAL PERFORMANCE CURVES
TYPICAL PERFORMANCE CURVES (T A =25°C)
70.00
69.90
69.80
69.70
69.60
69.50
69.40
69.30
69.20
69.10
69.00
100.0
99.0
98.0
97.0
96.0
95.0
94.0
93.0
92.0
91.0
90.0
19
20
21
22
23
24
25
26
27
28
29
20
21
22
23
24
25
26
27
28
70.00
69.90
69.80
69.70
69.60
69.50
69.40
69.30
69.20
69.10
69.00
Vin, volts
Figure 7. Line Regulation, V IN Changing
Vin, volts
Figure 10. Boost Efficiency vs Input Voltage
100.0
99.0
98.0
97.0
96.0
95.0
94.0
93.0
92.0
91.0
90.0
10
11
12
13
14
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
VPVCC, volts
Figure 8. Line Regulation, V PVCC Changing
70.00
69.90
69.80
69.70
69.60
69.50
69.40
69.30
69.20
69.10
69.00
Load Current, Am ps
Figure 11. Boost Efficiency vs Load Current
Note: Typical Performance Curves were performed under
the following conditions: f SW = 700 kHz, V IN = 24 V, V PVCC =
12 V, V DVDD = 3.3 V, and R L = 70 Ω . The following external
components are used: FDS3692 (Boost FET), FDS4675 (Q-
FET), L = 22 μ H (DCR = 54 m Ω ), C TOUT = 30 μ F, SS36-E3
(Schottky diode). The efficiency measurements do not
include Q-FET losses.
2.8
3.0
3.2
3.4
3.6
3.8
VDVDD, v olts
Figure 9. Line Regulation, V DVDD Changing
34848
Analog Integrated Circuit Device Data
Freescale Semiconductor
13
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