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LTC3315B Datasheet(PDF) 4 Page - Analog Devices

Part # LTC3315B
Description  5V, 12.5A Synchronous Step-Down Silent Switcher 2 in 3mm x 3mm LQFN
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3315B Datasheet(HTML) 4 Page - Analog Devices

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LTC3311S
4
Rev. A
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
VOUT Line Regulation
VOUT = 1.2V
VOUT Load Regulation
VOUT = 1.2V
Efficiency, VOUT = 0.5V
Forced Continuous Operation
VIN = 3.3V, TA = 25°C, unless otherwise noted.
Efficiency, VOUT = 0.5V
Pulse Skip Mode Operation
Efficiency, VOUT = 1.2V
Forced Continuous Operation
Efficiency, VOUT = 1.2V
Pulse Skip Mode Operation
ILOAD = 1A
LOAD = 3A
LOAD = 6A
LOAD = 9A
LOAD = 12A
INPUT VOLTAGE (V)
2.5
3
3.5
4
4.5
5
5.5
1.188
1.190
1.192
1.194
1.196
1.198
1.200
1.202
1.204
1.206
1.208
1.210
1.212
In VOUT = 1.2V Application
VOUT Line Regulation
3311A G01
VIN = 2.5V
VIN = 3.3V
VIN = 5V
ILOAD (A)
0
2
4
6
8
10
12
1.188
1.190
1.192
1.194
1.196
1.198
1.200
1.202
1.204
1.206
1.208
1.210
1.212
In VOUT = 1.2V Application
VOUT Load Regulation
3311S G02
FSW = 2MHz, Wurth HCM5030 744350300055
VIN = 2.5V
VIN = 3.3V
VIN = 5V
ILOAD (A)
0.001
0.01
0.1
1
10 20
0
10
20
30
40
50
60
70
80
90
100
Forced Continuous Operation
Efficiency, VOUT = 0.5V
3311S G03
FSW = 2MHz, Wurth HCM5030 744350300055
VIN = 2.5V
VIN = 3.3V
VIN = 5V
ILOAD (A)
0.001
0.01
0.1
1
10 20
0
10
20
30
40
50
60
70
80
90
100
Pulse Skip Mode Operation
Efficiency, VOUT = 0.5V
3311S G04
fSW = 2MHz Wurth HCM5030 74435030010
VIN = 2.5V
VIN = 3.3V
VIN = 5V
ILOAD (A)
0.001
0.01
0.1
1
10 20
0
10
20
30
40
50
60
70
80
90
100
Forced Continuous Operation
Efficiency, VOUT = 1.2V
3311S G05
fSW = 2MHz Wurth HCM5030 74435030010
VIN = 2.5V
VIN =3.3V
VIN = 5V
ILOAD (A)
0.001
0.01
0.1
1
10 20
0
10
20
30
40
50
60
70
80
90
100
Pulse Skip Mode Operation
Efficiency, VOUT = 1.2V
3311S G06
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3311SE is guaranteed to meet performance specifications from
0°C to 125°C junction temperature. Specifications over the –40°C to 125°C
operating junction temperature range are assured by design, characterization,
and correlation with statistical process controls. The LTC3311SI Is guaranteed
over the –40°C to 125°C operating junction temperature range.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MODE/SYNC No Clock Detect Time
20
µs
MODE/SYNC Clock Out Rise/Fall Time
CMODE/SYNC = 50pF
10
ns
MODE/SYNC Clock Low Output Voltage
IMODE/SYNC = 100µA
0.2
V
MODE/SYNC Clock High Output Voltage
IMODE/SYNC = 100µA
VIN – 0.2
V
MODE/SYNC Clock Out Duty Cycle
50
%
The l denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 2, 3) VIN = 3.3V, VEN = VIN, MODE/SYNC = 0V, unless otherwise noted.
Note 3: The LTC3311S includes overtemperature protection which
protects the device during momentary overload conditions. Junction
temperatures will exceed 150°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may impair device reliability.
Note 4: Supply current specification does not include switching currents.
Actual supply currents will be higher.



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