LT3420EMS-1 Linear Technology, LT3420EMS-1 Datasheet - Page 3

• 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

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Rated breakdown with LT3420 in power delivery mode and power
switch off.
Note 3: The LT3420/LT3420-1 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
Graphs apply to both the LT3420 and LT3420-1 unless otherwise noted.
temperature range, otherwise specifications are at T
PARAMETER
Primary Side Current Limit
Secondary Side Current Limit
Leakage Blanking Pulse Width
Refresh Timer Charge/Discharge Current
Refresh Timer Upper Threshold
Refresh Timer Lower Threshold
Switch V
Switch Leakage Current
CHARGE Input Voltage High
CHARGE Input Voltage Low
CHARGE Pin Bias Current
DONE Output Signal High
DONE Output Signal Low
TYPICAL PERFOR A CE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
335
330
325
320
315
310
305
300
295
–50
Output Voltage in Refresh Mode,
LT3420
CESAT
–25
0
TEMPERATURE (°C)
25
50
FIGURE 1 CIRCUIT
V
V
CC
BAT
= 3.3V
75
= 3.3V
W
100
3420 G01
U
125
335
330
325
320
315
310
305
300
295
2.5
A
Output Voltage in Refresh Mode,
LT3420
= 25°C. V
CONDITIONS
LT3420 (Note 5)
LT3420-1 (Note 5)
LT3420 (Note 5)
LT3420-1 (Note 5)
LT3420
LT3420-1
V
LT3420, SW = 1A (Note 5)
LT3420-1, SW = 0.5A (Note 5)
V
V
V
100k from V
33µA into DONE Pin
3.0
CT
SW
CHARGE
CHARGE
The
= 0.75V
= 38V (LT3420), V
3.5
●
= 3V
= 0V
CC
denotes the specifications which apply over the full operating
= V
CC
4.0
V
IN
to DONE
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Bias current flows out of R
Note 5: Current limit and V
to static test for DD package.
BAT
(V)
4.5
FIGURE 1 CIRCUIT
V
V
T
= 3.3V, V
A
CC
BAT
= 25°C
SW
5.0
= V
= V
IN
= 50V (LT3420-1)
IN
5.5
CHARGE
3420 G02
6.0
= V
CESAT
CC
unless otherwise noted. (Note 3)
10
LT3420/LT3420-1
8
6
4
2
0
guaranteed by design and/or correlation
2
Charge Time, LT3420
FB
FIGURE 1 CIRCUIT
UNLESS OTHERWISE
NOTED.
1.20
0.75
0.45
MIN
pin.
1.5
0.9
1.5
20
5
3
C
OUT
0.01
0.01
TYP
200
220
130
100
1.4
0.9
2.5
1.0
0.5
4.5
3.3
40
15
0
= 100µF
V
BAT
C
4
OUT
(V)
= 220µF
MAX
1.05
0.55
1.60
340
230
200
3.5
1.1
0.2
0.1
V
FROM
50V TO 320V
T
50
25
15
1
OUT
A
= 25°C
5
CHARGED
UNITS
3420 G03
3420fb
3
mA
mA
mV
mV
mV
µA
µA
µA
µA
ns
ns
6
A
A
V
V
V
V
V