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LT8349ACBZ-R7 Scheda tecnica(PDF) 5 Page - Analog Devices

Il numero della parte LT8349ACBZ-R7
Spiegazioni elettronici  8V, 12A, 2-Phase Low IQ Synchronous Boost Converter
PDF  29 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

LT8349ACBZ-R7 Scheda tecnica(HTML) 5 Page - Analog Devices

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Data Sheet
LT8349
analog.com
Rev B
5 of 29
(Specifications are for TA = 25°C, VIN = 3.6V, VEN/UVLO = 1.5V unless otherwise noted1.)
PARAMETER
SYMBOL
CONDITIONS/COMMENTS
MIN
TYP
MAX
UNITS
Spread Spectrum
Modulation Frequency
as Percentage of fSW
RT = 54.9kΩ
0.45
%
Spread Spectrum
Modulation Frequency
Range as Percentage of
fSW
RT = 54.9kΩ
25
%
Synchronizable
Frequency
fSYNC
SYNC/MODE = External Clock
0.3
4
MHz
SYNC/MODE Pin Input
Logic Level for
Frequency
Synchronization
VSYNC_HIGH
SYNC Logic Low
0.4
V
VSYNC_LOW
SYNC Logic High
1.8
Soft-Start Time
SS
RT = 54.9kΩ
1.2
ms
EN/UVLO Threshold
Voltage
VEN_F
Falling
–40°C ≤ TJ ≤
125°C
0.94
1.0
1.06
V
VEN_HYS
Hysteresis
35
mV
EN/UVLO Input Bias
Current
IEN
EN/UVLO = 2V
-40
40
nA
Bottom Switch On-
Resistance per Phase
RDS_ON_BOT
ISW = 1A
12
mΩ
Top Switch On-
Resistance per Phase
RDS_ON_TOP
ISW = 1A
13
mΩ
Bottom Switch Current
Limit per Phase
ISW_LIM
–40°C ≤ TJ ≤ 125°C
6
7
8
A
Channel 1 Burst Mode
Bottom Switch Minimum
Peak Current
IPK_BURST
ISET = VIN
1.7
A
ISET = Open
1.47
ISET = 0V
1.23
Bottom Switch Minimum
Off-time
tOFF-MIN
20
36
60
ns
Bottom Switch Minimum
On-time
tON-MIN
20
61
90
ns
SW Leakage Current per
Phase
ISW_LKG
VOUT = 6.1V, SW = 0V, 6.1V
-1.5
1.5
μA
.



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