LT3585-0/LT3585-1
LT3585-2/LT3585-3
20
3585f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 0706 • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC
®
3407 Dual 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
: 0.6V to 5V, I
Q
= 40µA,
Converter I
SD
<1µA, 10-Lead MSE/10-Lead DFN Packages
LT3420/LT3420-1 1.4A/1A, Photofl ash Capacitor Chargers with Charges
Automatic Top-Off
Charges 220µF to 320V in 3.7 Seconds from 5V, Automatic Top-Off
V
IN
: 2.2V to 16V, I
Q
= 90µA, I
SD
< 1µA, 10-Lead MS/10-Lead DFN
Packages
LTC3425 3A (I
OUT
), 8MHz, 4-Phase Synchronous Step-Up
DC/DC Converter
95% Effi ciency, V
IN
: 0.5V to 4.5V, V
OUT
: 2.4V to 5.25V, I
Q
= 12µA,
I
SD
< 1µA, 32-Lead 5mm × 5mm QFN Package
LTC3440 600mA (I
OUT
), Synchronous Buck-Boost DC/DC
Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT
: 2.5V to 5.5V,
Converter I
Q
= 25µA, I
SD
< 1µA, 10-Lead MS/10-Lead DFN Packages
LT3463/LT3463A Dual Boost (250mA)/Inverting (250mA/400mA) DC/DC
Converter for CCD Bias
Integrated Schottkys, V
IN
: 2.4V to 15V, V
OUT(MAX)
= ±40V, DC/DC
Converter for CCD Bias, I
Q
= 40µA, I
SD
< 1µA, 10-LeadDFN Package
LT3468 Photofl ash Capacitor Charger in ThinSOT
TM
Package Charges 100µF to 320V in 4.6 Seconds from 3.6V, V
IN
: 2.5V to 16V,
I
Q
= 5mA, I
SD
< 1µA, 5-Lead TSOT-23 Package
LT3472 Dual ±34V, 1.2MHz Boost (350mA)/Inverting (400mA)
DC/DC Converter for CCD Bias
Integrated Schottkys, V
IN
: 2.2V to 16V, V
OUT(MAX)
= ±34V, DC/DC
Converter for CCD Bias I
Q
= 2.8mA, I
SD
< 1µA, 10-Lead DFN Package
LT3484-0/LT3484-1
LT3484-2
Photofl ash Capacitor Chargers Charges 100µF to 320V in 4.6 Seconds from 3.6V,
LT3484-0 V
IN
: 2.5V to 16V, V
BAT
: 1.8V to 16V, I
Q
= 5mA, I
SD
< 1µA,
6-lead 2mm × 3mm DFN Package
LT3485-0/LT3485-1
LT3485-2/LT3485-3
Photofl ash Capacitor Charger with Output Voltage
Monitor and Integrated IGBT Drive
Charges 100µF Capacitor to 320V in 2.5 Seconds from 3.6V.
V
IN
: 1.8V to 10V, I
Q
= 5mA, I
SD
< 1µA, 10-Lead 3mm × 3mm DFN
Package
ThinSOT is a trademark of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Figure 18. LT3585-3 Typical Application
+
DONE
CHRG/IADJ
V
IN
IGBTPWR
IGBTIN
IGBTPU
IGBTPD
V
BAT
SW
GND
LT3585-3
320V
TO GATE OF IGBT
C1: 4.7µF, 10V, X5R OR X7R
C2: 0.22µF, 10V, X5R OR X7R
C
OUT
: RUBYCON 330V, 50µF PHOTOFLASH OUTPUT CAPACITOR (FW SERIES)
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
R1: PULL-UP RESISTOR NEEDED IF DONE PIN USED
T1: TOKYO COIL TTRN-0530-022-T, L
PRI
= 4µH, N = 10.3
3585 F18
C
OUT
PHOTOFLASH
CAPACITOR
C2
0.22µF
C1
4.7µF
R1
100k
V
IN
2.5V TO 8V
DONE
CHARGE
V
BAT
1.5V TO 8V
D1
T1
1:10.3
R2
20Ω TO 160Ω
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