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LTM4677 Datasheet(PDF) 8 Page - Analog Devices

Part # LTM4677
Description  Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
PDF  110 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTM4677 Datasheet(HTML) 8 Page - Analog Devices

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LTC3888-1
8
Rev. 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Digital Inputs (SCL, SDA, RUNn, FAULTn, SYNC, SHARE_CLOCK)
VIH
Input High Voltage
SCL, SDA, RUNn, FAULTn
SYNC, SHARE_CLK
l
l
1.25
1.8
V
V
VIL
Input Low Voltage
SCL, SDA, RUNn, FAULTn
SYNC, SHARE_CLK
l
l
0.8
0.6
V
V
VHYST
Input Hysteresis
SCL, SDA (Note 10)
65
mV
IIN
Input Leakage Current
0V ≤ SCL, SDA, RUN0, RUN1 ≤ 5.5V
l
–5
5
µA
CIN
Input Capacitance
(Note 16)
10
pF
tFILT
Input Digital Filter Delay
FAULTn
RUNn
3
10
µs
µs
Digital Outputs (SCL, SDA, RUNn, FAULTn, SYNC, SHARE_CLOCK, ALERT, PWMn, PGOODn, CLKOUT)
VOL
Output Low Voltage
ISINK = 3mA: SDA, SCL,
FAULTn, ALERT, SYNC,
RUNn, SHARE_CLK
ISINK = 2mA: PWMn, PGOODn,
CLKOUT
l
l
400
300
mV
mV
VOH
Output High Voltage
PWMn, ISOURCE = 2mA
l
2.7
V
ILKG
Output Leakage Current
0V ≤ PWMn, PGOODn ≤ VDD33,
0V ≤ CLKOUT ≤ VDD33
0V ≤ FAULTn, SYNC ≤ 3.6V,
0V ≤ SHARE_CLOCK ≤ 3.6V
0V ≤ RUNn, SCL, SDA, ALERT ≤ 5.5V
l
l
l
l
l
–2
–2
–2
–5
–5
2
2
2
5
5
µA
µA
µA
µA
µA
tRO
PWMn Output Rise Time
CLOAD = 30pF, 10% to 90%
5
ns
tFO
PWMn Output Fall Time
CLOAD = 30pF, 90% to 10%
4
ns
Serial Bus Timing
fSMB
Serial Bus Operating Frequency
l
10
400
kHz
tBUF
Bus Free Time Between Stop and
Start
l
1.3
µs
tHD,STA
Hold Time After (Repeated)
Start Condition. After this
Period, the First Clock is
Generated.
l
0.6
µs
tSU,STA
Repeated Start Condition Setup Time
l
0.6
µs
tSU,STO
Stop Condition Setup Time
l
0.6
µs
tHD,DAT
Data Hold Time:
Receiving Data
Transmitting Data
l
l
0
0.3
0.9
ns
µs
tSU,DAT
Input Data Setup Time
l
100
ns
tTIMEOUT
Clock Low Time-Out
l
25
35
ms
tLOW
Serial Clock Low Period
l
1.3
10,000
µs
tHIGH
Serial Clock High Period
l
0.6
µs
tF
Clock or Data Fall Time
90% to 10%
l
20
300
ns
tR
Clock or Data Rise Time
10% to 90%
l
20
300
ns
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 8). VIN = 12V, VSENSEn+ = 1V, VSENSEn– = GND = 0V,
fSYNC = 500kHz (externally driven) unless otherwise specified.



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