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LT3489 Datasheet(PDF) 10 Page - Linear Technology

Part # LT3489
Description  2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start
Download  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3489 Datasheet(HTML) 10 Page - Linear Technology

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LT3489
10
3489f
AVDD LOAD CURRENT (mA)
0
65
70
75
300
500
3489 TA01b
60
55
50
100
200
400
80
85
90
700
600
VON LOAD = 10mA
VOFF LOAD = 20mA
TYPICAL APPLICATIO
VIN
VIN
3.3V
SW
FB
LT3489
L1
2.2
µH
D1
R3
5.23k
R2
28.7k
3489 TA04
C2
20
µF
C5
0.1
µF
C6
0.1
µF
C7
0.1
µF
C4
2
µF
C3
2
µF
C1
4.7
µF
CSS
100nF
D7
D2
D3
VOFF
–8V
20mA
AVDD
8V
610mA
VON
23V
10mA
D6
C8
0.1
µF
VC
GND*
SHDN
3
8
7
14
2
5
6
SS
COMP
+
D4
D5
C1 TO C8: X5R OR X7R
C1: AVX 08056D475KAT
C2: 2
× 10µF, TAIYO YUDEN LMK316BJ106ML
C3: 2
× 10µF, 10V
C4: 2
× 1µF, AVX08053D105KAT
C5, C6, C7: 0.1
µF, 10V
C8: 0.1
µF, 16V
D1: DIODES INC. DFLS220L
D2 TO D7: ZETEX BAT54S OR EQUIVALENT
L1: COOPER BUSSMANN SD25-2R2
* EXPOSED PAD MUST ALSO BE GROUNDED
OFF ON
10mA
37.4k
220pF
Transient Response
Start-Up Waveforms
AVDD
100mV/DIV
AC COUPLED
IL1
1A/DIV
400mA
ILOAD
200mA
5
µs/DIV
3489 TA07
AVDD
5V/DIV
VON
20V/DIV
VOFF
5V/DIV
IIN
0.5A/DIV
5ms/DIV
3489 TA08
Effciency


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