LT3420EMS-1 Linear Technology, LT3420EMS-1 Datasheet - Page 20

• Manufacturer Part Number: LT3420EMS-1
• Description: IC PHOTOFLASH CHARGER CAP 10MSOP
• Manufacturer: Linear Technology

Specifications of LT3420EMS-1

• Applications: Photoflash Capacitor Charger
• Current - Supply: 90µA
• Voltage - Supply: 2.2 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

RELATED PARTS
TYPICAL APPLICATIO
LT3420/LT3420-1
PART NUMBER
LTC
LTC3401/LTC3402
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407
LTC3411
LTC3425
LTC3440/LTC3441
LT3464
LTC3467
LTC3468/LTC3468-1/
LTC3468-2
ThinsSOT is a trademark of Linear Technology Corporation.
20
DANGER HIGH VOLTAGE
OPERATION BY HIGH VOLTAGE
TRAINED PERSONEL ONLY
®
C1, C2: 4.7µF, X5R or X7R, 6.3V
C3: RUBYCON 100µF PHOTOFLASH CAPACITOR
T1: TDK LDT565630T-002 FLYBACK TRANSFORMER
D1: VISHAY GSD2004S SOT-23
3400/LTC3400B
1.8V TO 6V
2.5V TO 6V
CHARGE
DUAL DIODE. DIODES CONNECTED IN SERIES
DONE
V
V
BAT
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
CC
C2
4.7µF
C1
4.7µF
DESCRIPTION
600mA (I
DC/DC Converters
1A/2A (I
DC/DC Converters
300mA (I
DC/DC Converters
600mA (I
DC/DC Converters
Dual 600mA (I
DC/DC Converter
1.25A (I
DC/DC Converter
5A (I
DC/DC Converter
600mA/1A (I
DC/DC Converters
85mA (I
Step-Up DC/DC Converter with Integrated Schottky
and Output Disconnect
1.1A (I
DC/DC Converter
Photoflash Capacitor Charger in ThinSOT
9
8
4
●
V
V
CHARGE
DONE
FAX: [phone]
SW
C
BAT
CC
T
SW
10
2
), 8MHz, Multiphase Synchronous Step-Up
OUT
SW
SW
LT3420-1
SW
OUT
OUT
0.1µF
), 1.3MHz, High Efficiency Step-Up
R
), Constant Off-Time, High Efficiency
), 3MHz, Synchronous Step-Up
), 4MHz, Synchronous Step-Down
FB
), 1.2MHz, Synchronous Step-Up
), 1.5MHz, Synchronous Step-Down
), 1.5MHz, Synchronous Step-Down
OUT
3
60.4k
OUT
), 2MHz/1MHz, Synchronous Buck-Boost
LT3420-1 Photoflash Circuit Uses Tiny (3mm Tall) Transformer
5
8
R
), 1.5MHz, Synchronous Step-Down
GND
SEC
SW
REF
U
1:10.2
6
5
T1
1
7
1
4
●
2k
www.linear.com
PHOTOFLASH
CAPACITOR
D1
100µF
330V
C3
+
3420 TA04
320V
COMMENTS
V
I
V
MS Package
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
V
ThinSOT Package
V
ThinSOT Package
Fast Photoflash Charge Times; 4.6sec for LT3468, 5.5sec for
LT3468-1, 5.7sec for LT3468-2
SD
SD
SD
SD
SD
SD
SD
IN
IN
IN
IN
= 0.85V to 5V, V
= <1µA, ThinSOT
= 0.5V to 5V, V
= <1µA, ThinSOT Package
= <1µA, ThinSOT Package
= <1µA, ThinSOT Package
= <1µA, MS Package
= <1µA, QFN Package
= <1µA, MS Package
= 2.3V to 10V, V
= 2.4V to 16V, V
10
8
6
4
2
0
2
IN
IN
IN
IN
IN
IN
OUT(MAX)
= 2.7V to 6V, V
= 2.5V to 5.5V, V
= 2.5V to 5.5V, V
= 2.5V to 5.5V, V
= 0.5V to 4.5V, V
= 2.5V to 5.5V, V
OUT(MAX)
OUT(MAX)
OUT(MAX)
3
TM
Charge Time
C
Package
OUT
V
= 40µF
C
= 6V, I
BAT
OUT
= 5V, I
= 34V, I
= 40V, I
© LINEAR TECHNOLOGY CORPORATION 2002
4
(V)
V
FROM 50V TO 320V
= 100µF
OUT
Q
OUT(MIN)
Q
= 38µA, I
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
LT/LT 0305 REV B • PRINTED IN USA
CHARGED
Q
Q
= 19µA/300µA,
= 25µA, I
= 1.2mA, I
5
= 0.8V , I
3420 TA05
SD
= 0.6V, I
= 0.6V, I
= 0.8V, I
= 5.25V, I
= 2.5V, I
SD
= <1µA,
6
SD
= <0.5µA,
= <1µA,
Q
Q
Q
Q
Q
= 20µA,
Q
= 20µA,
= 40µA,
= 60µA,
= 25µA,
= 12µA,
3420fb