LTC3411 データシートの表示（PDF） - Linear Technology
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LTC3411 Datasheet PDF : 20 Pages
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LT3420/LT3420-1
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VBAT = 3.3V, VCHARGE = VCC unless otherwise noted. (Note 3)
PARAMETER
Switch VCESAT
Switch Leakage Current
CHARGE Input Voltage High
CHARGE Input Voltage Low
CHARGE Pin Bias Current
DONE Output Signal High
DONE Output Signal Low
CONDITIONS
LT3420, SW = 1A
LT3420-1, SW = 0.5A
VSW = 38V (LT3420), VSW = 50V (LT3420-1)
VCHARGE = 3V
VCHARGE = 0V
100k from VCC to DONE
33µA into DONE Pin
MIN TYP MAX UNITS
220 340
mV
130 230
mV
0.01
1
µA
1.5
V
0.2
V
4.5
15
µA
0.01
0.1
µA
3.3
V
100 200
mV
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
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Bias current flows out of RFB pin.
Note 5: Current limit guaranteed by design and/or correlation to static test.
TYPICAL PERFOR A CE CHARACTERISTICS
Graphs apply to both the LT3420 and LT34201-1 unless otherwise noted.
Output Voltage in Refresh Mode,
LT3420
335
330
325
320
315
310
305
300
295
–50 –25
FIGURE 1 CIRCUIT
VCC = 3.3V
VBAT = 3.3V
0 25 50 75 100 125
TEMPERATURE (°C)
3420 G01
Output Voltage in Refresh Mode,
LT3420
335
330
325
320
315
310
305
FIGURE 1 CIRCUIT
300
VCC = VIN
VBAT = VIN
295
TA = 25°C
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
3420 G02
Charge Time, LT3420
10 FIGURE 1 CIRCUIT
UNLESS OTHERWISE
NOTED.
8
VOUT CHARGED
FROM
50V TO 320V
TA = 25°C
6
COUT = 220µF
4
COUT = 100µF
2
0
2
3
4
5
6
VBAT (V)
3420 G03
3420fa
3
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