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LTC3404 датащи(PDF) 3 Page - Linear Technology

номер детали LTC3404
подробное описание детали  1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator
PDF  16 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC3404 датащи(HTML) 3 Page - Linear Technology

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LTC3404
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3404E is 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 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC3404EMS8: TJ = TA + (PD)(150°C/W)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IPK
Peak Inductor Current
VIN = 3.3V, VFB = 0.7V, Duty Cycle < 35%
0.8
1.0
1.25
A
ILSW
SW Leakage
VRUN = 0V, VSW = 0V or 6V, VIN = 6V
±0.01
±1
µA
VSYNC/MODE SYNC/MODE Threshold
VSYNC/MODE Rising
q
0.3
1.0
1.5
V
ISYNC/MODE
SYNC/MODE Leakage Current
±0.01
±1
µA
VRUN
RUN Threshold
VRUN Rising
q
0.3
0.7
1.5
V
IRUN
RUN Input Current
±0.01
±1
µA
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 3.6V unless otherwise specified.
Note 4: The LTC3404 is tested in a feedback loop which servos VFB to the
balance point for the error amplifier (VITH = 1.2V).
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Input Voltage
Efficiency vs Output Current
Efficiency vs Output Current
INPUT VOLTAGE (V)
2
75
80
5
7
3404 G01
70
60
85
65
34
6
90
95
8
Burst Mode OPERATION
VOUT = 2.5V
L = 4.7
µH
IOUT = 100mA
IOUT = 10mA
IOUT = 1mA
IOUT = 300mA
IOUT = 0.1mA
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3404 G02
0
1
VIN = 3.6V
VIN = 3.6V
VIN = 4.2V
VIN = 4.2V
PULSE SKIPPING MODE
Burst Mode OPERATION
VOUT = 1.8V
L = 4.7
µH
OUTPUT CURRENT (mA)
55
65
70
80
90
0.1
10
100
1000
3404 G03
1
75
60
50
85
L = 4.7
µH
L = 3.5
µH
Burst Mode OPERATION
VIN = 6V
VOUT = 2.5V



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