LTC1699 Series
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 2.7V
≤
V
CC
≤
5.5V (Notes 3, 4) unless otherwise stated.
SYMBOL
I
SK1
I
SK2
I
LKG
I
PU
f
SMB
t
BUF
t
HD:STA
t
SU:STA
t
SU:STO
t
HD:DAT
t
SU:DAT
t
LOW
t
HIGH
t
f
t
r
t
SSH
t
SSL
t
SPL
t
PH
t
PL
t
PPL
t
VH
t
VL
t
VPL
t
PGL
PARAMETER
SDA, PGOOD, CPU_ON, IO_ON,
CLK_ON Sink Current at V
CC
= 2.7V
SDA, PGOOD, CPU_ON, IO_ON,
CLK_ON Sink Current at V
CC
= 5.5V
PGOOD, CPU_ON, IO_ON,
CLK_ON Leakage Current
VRON Pull-Up Current
SMBus Operating Frequency
Bus Free Time Between Stop/Start
Hold Time After (Repeated) Start
Repeated Start Setup Time
Stop Condition Setup Time
Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
SCL, SDA Fall Time
SCL, SDA Rise Time
SEL to SENSE High (Note 6)
SEL to SENSE Low (Note 6)
SEL Toggling to PGOOD Low
Stop Bit to CPU_ON, IO_ON
or CLK_ON High (Note 7)
Stop Bit to CPU_ON, IO_ON
or CLK_ON Low (Note 7)
Stop Bit to PGOOD Low (Note 6)
VRON High to CPU_ON, IO_ON
or CLK_ON High
VRON Low to CPU_ON, IO_ON,
CLK_ON Low
VRON Low to PGOOD Low
PGOOD Low Duration
0.9V
CC
to 0.65V
0.65V to 2.25V
Toggle SEL to Switch from Min V
OUT
to Max V
OUT
,
VFB = 0.8V
Toggle SEL to Switch from Max V
OUT
to Min V
OUT
,
VFB = 0.8V
Toggle SEL to Select New Code
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
C
L
= 0.1µF, 10kΩ Pull-Up, S1 in Figure 1
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
C
L
= 0.1µF, 10kΩ Pull-Up, S1 in Figure 1
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
C
L
= 100pF, 10kΩ Pull-Up, S2 in Figure 1
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
0
≤
V
PIN
≤
2.7V
0
≤
V
PIN
≤
5.5V
0
≤
V
PIN
≤
5.5V
V
PIN
= 0
q
q
q
q
MIN
5
35
TYP
19
65
MAX
60
150
±2
UNITS
mA
mA
µA
µA
KHz
µs
µs
µs
µs
ns
ns
µs
µs
–1
10
4.7
4.0
4.7
4.0
300
250
4.7
4.0
– 2.5
–7
100
Timing (Note 5)
q
q
q
q
q
q
q
q
q
q
q
300
1000
500
500
160
500
2
20
50
250
2
50
130
30
50
500
70
ns
ns
ns
ns
ns
µs
µs
ns
µs
µs
ns
µs
Note1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC1699-80E, LTC1699-81E and LTC1699-82E are
guaranteed to meet performance specifications from 0°C to 70°C.
Specifications over the – 40°C to 85°C operating temperature range are
assured by design, characterization and correlation with statistical process
controls.
Note 3:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 4:
All typical numbers are given for V
CC
= 5V and T
A
= 25°C.
Note 5:
These parameters are guaranteed by design and are not tested in
production. SMBus timing is referenced to V
IL
and V
IH
levels.
Note 6:
Dominated by the switching regulator. The delay due to the
LTC1699-80, LTC1699-81 or LTC1699-82 is typically 500ns.
Note 7:
Measured from the rising edge of SDA during Data High
acknowledgement.
3
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