lt3468es5-trpbf Linear Technology Corporation, lt3468es5-trpbf Datasheet - Page 12

• Manufacturer Part Number: lt3468es5-trpbf
• Description: Lt3468-1 - Photoflash Capacitor Chargers In Thinsot?
• Manufacturer: Linear Technology Corporation

LT3468/LT3468-1/LT3468-2
TYPICAL APPLICATIO S
RELATED PARTS
12
PART NUMBER
LTC3407
LT3420/LT3420-1
LTC3425
LTC3440/LTC3441
2.5V TO 8V
C1: 4.7µF, X5R OR X7R, 10V
T1: TDK PART# LDT565630T-001, L
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
2.5V TO 8V
C1: 4.7µF, X5R OR X7R, 10V
T1: TDK PART# LDT565630T-002, L
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
CHARGE
DONE
CHARGE
V IN
DONE
V IN
100k
R1
100k
R1
DESCRIPTION
Dual 600mA (I
Converter
1.4A/1A, Photoflash Capacitor Chargers with
Automatic Top-Off
5A I
Converter
600mA/1A (I
●
C1
4.7µF
SW
FAX: [phone]
3
4
C1
4.7µF
, 8MHz, Multi-Phase Synchronous Step-Up DC/DC
DONE
CHARGE
3
4
V
DONE
CHARGE
IN
5
V
LT3468
IN
OUT
5
LT3468-1
OUT
PRI
), Synchronous Buck-Boost DC/DC Converter 95% Efficiency, V
LT3468-1 Photoflash Circuit uses Tiny 3mm Tall Transformer
), 1.5MHz, Synchronous Step-Down DC/DC 96% Efficiency, V
PRI
LT3468 Photoflash Circuit uses Tiny 3mm Tall Transformer
= 6µH, N = 10.4
U
SW
GND
5, 6
7, 8
= 14.5µH, N = 10.2
1
SW
GND
1
●
2
1:10.4
5
8
www.linear.com
T1
2
1:10.2
T1
D2
4
1
D2
4
1
D1
D1
+
+
C OUT
PHOTOFLASH
CAPACITOR
320V
C OUT
PHOTOFLASH
CAPACITOR
320V
3468 TA03
3468 TA04
COMMENTS
Charges 220µF to 320V in 3.7 seconds from 5V,
V
95% Efficiency, V
I
I
I
SD
Q
SD
IN
: 25µA, I
: <1µA, QFN-32
: 2.2V to 16V, I
: <1µA, MS10E
10
10
SD
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
: <1µA, MS-10, DFN-12
2
2
C
OUT
IN
IN
IN
C
Q
3
3
OUT
: 2.5V to 5.5V, V
: 0.5V to 4.5V, V
: 2.5V to 5.5V, V
: 90µA, I
= 50µF
= 20µF
4
4
Charge Time
Charge Time
© LINEAR TECHNOLOGY CORPORATION 2003
SD
5
5
V
V
: <1µA, MS10
IN
IN
C
C
LT/TP 0105 1K REV A • PRINTED IN USA
OUT
OUT
(V)
(V)
6
6
OUT(MIN)
OUT(MIN)
OUT(MIN)
= 100µF
= 50µF
7
7
: 0.6V, I
: 5.25V, I
: 2.5V to 5.5V,
8
8
3468 TA05
3468 TA06
Q
9
9
: 40µA,
Q
: 12µA,
346812fa