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LT8494 Datasheet(PDF) 19 Page - Linear Technology

Part # LT8494
Description  SEPIC/Boost DC/DC Converter with 2A, 70V Switch, and 7關A Quiescent Current
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8494 Datasheet(HTML) 19 Page - Linear Technology

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LT8494
19
8494fa
For more information www.linear.com/LT8494
TYPICAL APPLICATIONS
750kHz, 16V to 32V Input, 48V Output, 0.5A Boost Converter
450kHz, 5V Output SEPIC Converter (Same as Front Page Application)
L1
22µH
C1: 2.2µF, 50V, X5R, 1206
C2: 4.7µF, 100V, X7R, 1210
D1: ONSEMI MBRA2H100
L1: WURTH LHMI 74437349220
D1
0.2µF
10pF
VIN
16V TO 32V
VOUT
48V
0.5A
SW
FB
BIAS
GND
VIN
SWEN
RT
PG
SS
1M
25.5k
8494 TA02a
93.1k
LT8494
C2
4.7µF
×2
C1
2.2µF
LOAD CURRENT (mA)
0
100
200
300
400
500
70
75
80
85
90
95
100
8494 TA02b
VIN = 24V
200µs/DIV
8494 TA02d
VOUT
0.5V/DIV
AC-COUPLED
IL
0.5A/DIV
VIN = 24V
96 LOAD
5ms/DIV
8494 TA02e
VOUT
20V/DIV
VSS
0.5V/DIV
IL
0.5A/DIV
Efficiency, VIN = 24V
Transient Response with 400mA to
500mA to 400mA Output Load Step
Start-Up Waveforms
L1
15µH
C1: 4.7µF, 100V, X5R, 1206
C3: 2.2µF, 100V, X5R, 1206
C2: TAIYO YUDEN, EMK325BJ476MM-T
D1: ONSEMI MBRA2H100
L1, L2: COILTRONICS DRQ125-150-R
D1
1µF
4.7pF
VIN
3V TO 60V
(3V TO 32V
FOR START-UP)
VOUT
5V
0.35A (VIN = 3V)
0.6A (VIN = 5V)
1.0A (VIN > 12V)
SW
BIAS
FB
GND
VIN
SWEN
RT
PG
SS
316k
1M
8494 TA02c
169k
LT8494
C2
47µF
×2
C3
2.2µF
C1
4.7µF
•
L2
15µH



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