Datasheet

UCD9244
SLVSAL6A –NOVEMBER 2010– REVISED FEBRUARY 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (Continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN NOM MAX UNIT
DIGITAL INPUTS/OUTPUTS
Dgnd
V
OL
Low-level output voltage I
OL
= 6 mA
(1)
, V
33DIO
= 3 V V
+0.25
V
33DIO
V
OH
High-level output voltage I
OH
= -6 mA
(2)
, V
33DIO
= 3 V V
–0.6V
V
IH
High-level input voltage V
33DIO
= 3V 2.1 3.6 V
V
IL
Low-level input voltage V
33DIO
= 3.5 V 1.4 V
SYSTEM PERFORMANCE
V
RESET
Voltage where device comes out of reset V
33D
Pin 2.3 2.4 V
t
RESET
Pulse width needed for reset nRESET pin 2 µs
Vref commanded to be 1V, at 25°C AFEgain = 4,
Setpoint Reference Accuracy –10 10 mV
1V input to EAP/N measured at output of the
EADC
(3)
V
RefAcc
Setpoint Reference Accuracy over
–40°C to 125°C –20 20 mV
temperature
AFEgain = 4 compared to
V
DiffOffset
Differential offset between gain settings –4 4 mV
AFEgain = 1, 2, or 8
240 + 1
t
Delay
Digital Compensator Delay 240 switching ns
cycle
F
SW
Switching Frequency 15.260 2000 kHz
Accuracy –5% 5%
Duty Max and Min Duty Cycle 0% 100%
V
33
Slew Minimum V
33
slew rate V33 slew rate between 2.3V and 2.9V 0.25 V/ms
t
retention
Retention of configuration parameters T
J
= 25 °C 100 Years
Write_Cycles Number of nonvolatile erase/write cycles T
J
= 25 °C 20 K cycles
All rails configured to accept VID messages
(4)
1
Rate
VID
Max VID message rate All rails configured to accept 6-bit VID messages
(4)
4 msg/msec
All rails configured to accept 8-bit VID messages
(5)
4
(1) The maximum I
OL
, for all outputs combined, should not exceed 12 mA to hold the maximum voltage drop specified.
(2) The maximum I
OH
, for all outputs combined, should not exceed 48 mA to hold the maximum voltage drop specified.
(3) With default device calibration. PMBus calibration can be used to improve the regulation tolerance.
(4) VID message rate on each interface. Measured over a 1.0 msec interval
(5) VID message rate on PMBus interface.
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