LT8471
31
8471fd
For more information www.linear.com/8471
Typical applicaTions
Figure 11a. Wide Input Range Converter with ±5V Output Voltages at 450kHz
Figure 11c. Start-Up/Dropout Performance
V
CC
Is Ramped from 0V Up to 6V and Then Back
Down to 0V. Channel 1 Output Voltage Is Loaded
by a 100Ω Resistor
V
CC
Is Ramped from 0V Up to 6V and Then Back
Down to 0V. Channel 1 Output Voltage Is Loaded
by a 5Ω Resistor
Figure 11d. Start-Up/Dropout Performance
Figure 11b. Efficiency and Power Loss (Load from V
OUT1
to V
OUT2
)
8471 F11c
100ms/DIV
1V/DIV
V
CC
V
OUT1
8471 F11d
100ms/DIV
1V/DIV
V
CC
V
OUT1
RTSYNC
LT8471
8471 F11a
SHOUT
V
IN2
V
IN1
SS2
C3
SS1
OV/UV
E1
C2
FB2
E2
GND
C1
FB1
V
OUT1
5V
1.6A (V
CC
= 6V)
1.5A (V
CC
= 18V)
1.5A (V
CC
= 32V)
0.65A (V
CC
= 6V)
0.95A (V
CC
= 18V)
1.05A (V
CC
= 32V)
C1, C2: 10V, X7R, 1210
C3, C4, C5, C6, C7: 50V, X7R, 1206
D1, D2: DIODES INC SBR3U100LP-7
L1: WÜRTH 74437346 100
L2: WÜRTH 74437346 100
L3: WÜRTH 744025 150
V
OUT2
–5V
C2
47µF
×2
D2
L2
10µH
L3
15µH
C6
1µF
C4
2.2µF
C7
2.2µF
C5
2.2µF
0.1µF
187k
0.1µF
PG1
PG2
59k
316k
316k
59k
C3
1µF
C1
47µF
×2
V
CC
6V TO 32V
D1
L1
10µH
100k
100k
475k
POWER LOSS
0
20
40
60
80
10
30
50
70
90
LOAD CURRENT (A)
EFFICIENCY (%)
POWER LOSS (W)
0
1
3
2
4
8471 F11b
0
0.2
0.4 0.6 0.8 1.0
EFFICIENCY
6V
18V
32V
V
CC
=
