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LTM4700
ELECTRICAL CHARACTERISTICS
operating temperature range (Note 2). Specified as each individual output channel (Note 4). T
FREQUENCY_SWITCH = 350kHz and V
settings and per Test Circuit 1, unless otherwise noted.
SYMBOL
PARAMETER
Digital Input WP
I
Input Pull-Up Current
PUWP
Open-Drain Outputs SCL, SDA, FAULTn, ALERT, RUNn, SHARE_CLK, PGOODn
V
Output Low Voltage
OL
Digital Inputs SHARE_CLK, WP (Note 15)
V
Input High Threshold Voltage
IH
V
Input Low Threshold Voltage
IL
Digital Filtering of FAULTn (Note 15)
I
Input Digital Filtering FAULTn
FLTG
Digital Filtering of PGOODn (Note 15)
I
Output Digital Filtering PGOODn
FLTG
Digital Filtering of RUNn (Note 15)
I
Input Digital Filtering RUN
FLTG
PMBus Interface Timing Characteristics (Note 15)
f
Serial Bus Operating Frequency
SCL
t
Bus Free Time Between Stop and
BUF
Start
t
Hold Time After Repeated Start
HD(STA)
Condition After This Period, the
First Clock is Generated
t
Repeated Start Condition Setup
SU(STA)
Time
t
Stop Condition Setup Time
SU(ST0)
t
Date Hold Time
HD(DAT)
Receiving Data
Transmitting Data
t
Data Setup Time
SU(DAT)
Receiving Data
t
Stuck PMBus Timer Non-Block
TIMEOUT_SMB
Reads
Stuck PMBus Timer Block Reads
t
Serial Clock Low Period
LOW
t
Serial Clock High Period
HIGH
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 LTM4700 is tested under pulsed-load conditions such that
T
≈ T
. The LTM4700E is guaranteed to meet performance specifications
J
A
over the 0°C to 125°C internal operating temperature range. Specifications
over the –40°C to 125°C internal operating temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTM4700I is guaranteed to meet specifications over the full
–40°C to 125°C internal operating temperature range. T
10
The
denotes the specifications which apply over the specified internal
l
commanded to 1.000V unless otherwise noted. Configured with factory-default EEPROM
OUTn
CONDITIONS
WP
I
= 3mA
SINK
Measured from the Last PMBus Start Event
is calculated from
J
For more information
= 25°C, V
A
the ambient temperature T
and the power dissipation PD according to the
A
formula:
T
= T
+ (P
• θ
)
J
A
D
JA
Note that the maximum ambient temperature consistent with these
specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
Note 3: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
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= 12V, RUNn = 3.3V,
IN
MIN
TYP
MAX
UNITS
10
0.4
1.5
1.8
l
0.6
1
l
3
100
10
10
400
l
1.3
l
0.6
l
0.6
10000
l
0.6
l
0
l
0.3
0.9
l
0.1
32
255
1.3
10000
l
0.6
l
Rev. B
µA
V
V
V
µs
µs
µs
kHz
µs
µs
µs
µs
µs
µs
µs
ms
µs
µs
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