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LTC3375 Datasheet(PDF) 4 Page - Analog Devices

Part # LTC3375
Description  20V, 4-Channel Buck DC/DC with 8x Configurable 1.5A Power Stages
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3375 Datasheet(HTML) 4 Page - Analog Devices

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LTC3376
4
Rev 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Buck Regulators Combined
Top Switch Current Limit, Duty < 18%
1 Buck with 2 Power Stages Combined (Note 5)
5.25
A
1 Buck with 3 Power Stages Combined (Note 5)
7.88
A
1 Buck with 4 Power Stages Combined (Note 5)
10.5
A
1 Buck with 5 Power Stages Combined (Note 5)
13.1
A
1 Buck with 6 Power Stages Combined (Note 5)
15.8
A
1 Buck with 7 Power Stages Combined (Note 5)
18.4
A
1 Buck with 8 Power Stages Combined (Note 5)
21
A
Temperature Monitor
VTEMP(ROOM) TEMP Voltage at 25°C
220
250
280
mV
∆VTEMP/°C
VTEMP Slope
10
mV/°C
OT
Overtemperature Shutdown (Note 7)
Temperature Rising
165
°C
Overtemperature Hysteresis
10
°C
Current Monitors
IMON1-4 Voltage at 1.5A Load
RIMON = 10k, Duty Cycle = 25%
0.9
1
1.1
V
IMON1-4 Voltage at No Load
SYNC/MODE = INTVCC
0
V
IMON1-4 Slope
RIMON = 10k
0.667
V/A
Interface Logic Pins (CFG0-3, SYNC/MODE, PGOOD1-4)
IOH
Output High Leakage Current
PGOOD1-4 at 5.5V
1
µA
VOL
Output Low Voltage
PGOOD1-4, 3mA into Pin
0.03
0.4
V
VIH
Input High Threshold
CFG0-3, SYNC/MODE
l
1.2
V
VIL
Input Low Threshold
CFG0-3, SYNC/MODE
l
0.4
V
IIH, IIL
Input High, Low Leakage Current
CFG0-3 Pins at INTVCC & 0V
SYNC/MODE Pin at 5.5V & 0V
1
1
µA
µA
Interface Logic Pins (RUN1-4)
RUN Rising Threshold
First Regulator Turning On
One Regulator or More Already in Use
l
l
350
280
730
300
1200
320
mV
mV
RUN Falling Threshold
RUN Falling Threshold
Last Regulator Turning Off
One Regulator or More Kept On
l
180
690
200
220
mV
mV
RUN Pin Leakage Current
RUN1-4 = 5.5V
1
µA
The l denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VINA-H = 12V, RT tied to INTVCC, VFB1-4¯ = 0V, unless
otherwise stated.



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