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LT8331 数据表(PDF) 3 Page - Analog Devices

部件名 LT8331
功能描述  28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru
PDF  24 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

LT8331 数据表(HTML) 3 Page - Analog Devices

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LT8337/LT8337-1
3
Rev. 0
For more information www.analog.com
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operation Voltage
l
2.7
28
V
VIN Quiescent Current in Shutdown
EN/UVLO = 0.15V
EN/UVLO = 0.15V
l
0.3
0.3
1
10
µA
µA
LT8337 VIN Quiescent Current
SYNC/MODE = 0V, Not Switching
4
8
µA
SYNC/MODE = Open, Not Switching
0.9
1.5
mA
VIN = 10.1V, VOUT = 10V, FB = 1.05V (In PassThru Mode)
15
25
µA
LT8337-1 VIN Quiescent Current
SYNC/MODE = 0V, Not Switching
23
35
µA
SYNC/MODE = Open, Not Switching
0.9
1.5
mA
VIN = 10.1V, VOUT = 10V, FB = 1.05V (In PassThru Mode)
30
60
µA
FB Regulation Voltage
E-Grade
J-Grade
l
l
0.994
0.983
0.980
1.000
1.000
1.000
1.006
1.010
1.012
V
V
V
FB Line Regulation
2.7V < VIN < 28V
l
0.005
0.03
%/V
FB Pin Input Current
FB = 1.0V
–20
20
nA
Switching Frequency
RT = 357kΩ
RT = 102kΩ
RT = 47.5kΩ
RT = 30.1kΩ
l
270
0.93
1.85
2.7
300
1
2
3
330
1.07
2.15
3.3
kHz
MHz
MHz
MHz
Spread Spectrum Modulation Frequency
as Percentage of fSW
0.45
%
Spread Spectrum Modulation Frequency
Range as Percentage of fSW
20
%
Synchronizable Frequency
SYNC/MODE = External Clock
l
0.3
3
MHz
SYNC/MODE Pin Input Logic Level for
Frequency Synchronization
SYNC Logic Low
SYNC Logic High
l
l
1.7
0.4
V
V
Soft-Start Time
RT = 47.5kΩ
1.4
ms
EN/UVLO Threshold Voltage
Falling
Hysteresis
l
0.94
1.0
90
1.06
V
mV
EN/UVLO Input Bias Current
EN/UVLO = 2V
–40
40
nA
LT8337 PG Upper Threshold Offset from
Regulated FB
FB Falling
Hysteresis
l
5
8
1
12
%
%
LT8337 PG Lower Threshold Offset from
Regulated FB
FB Rising
Hysteresis
l
–12
–8
1
–5
%
%
LT8337 PG Leakage Current
PG = 3.5V
–40
40
nA
LT8337 PG Pull-Down Resistance
PG = 0.1V
700
2000
Ω
LT8337-1 Error Amp Transconductance
VC = 1.25V
0.4
mS
LT8337-1 Error Amp Gain
400
V/V
LT8337-1 VC Source Current
FB = 0.8V, VC = 1.25V
–75
μA
LT8337-1 VC Sink Current
FB = 1.2V, VC = 1.25V
70
μA
LT8337-1 VC Pin to Switch Current Gain
6.0
A/V
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, EN/UVLO = 2V, unless otherwise noted.



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