LTC1699 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1699 Datasheet PDF : 20 Pages
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LTC1699 Series
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. 2.7V ≤ VCC ≤ 5.5V (Notes 3, 4) unless otherwise stated.
SYMBOL
ISK1
ISK2
ILKG
PARAMETER
SDA, PGOOD, CPU_ON, IO_ON,
CLK_ON Sink Current at VCC = 2.7V
SDA, PGOOD, CPU_ON, IO_ON,
CLK_ON Sink Current at VCC = 5.5V
PGOOD, CPU_ON, IO_ON,
CLK_ON Leakage Current
CONDITIONS
0 ≤ VPIN ≤ 2.7V
0 ≤ VPIN ≤ 5.5V
0 ≤ VPIN ≤ 5.5V
MIN TYP MAX UNITS
q5
19
60
mA
q 35
65
150
mA
q
±2
µA
IPU
VRON Pull-Up Current
Timing (Note 5)
VPIN = 0
q –1
– 2.5
–7
µA
fSMB
tBUF
tHD:STA
tSU:STA
tSU:STO
tHD:DAT
tSU:DAT
tLOW
tHIGH
tf
tr
tSSH
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)
q 10
100
KHz
q 4.7
µs
q 4.0
µs
q 4.7
µs
q 4.0
µs
q 300
ns
q 250
ns
q 4.7
µs
q 4.0
µs
0.9VCC to 0.65V
0.65V to 2.25V
q
300
ns
q
1000
ns
Toggle SEL to Switch from Min VOUT to Max VOUT,
500
ns
VFB = 0.8V
tSSL
SEL to SENSE Low (Note 6)
Toggle SEL to Switch from Max VOUT to Min VOUT,
500
ns
VFB = 0.8V
tSPL
SEL Toggling to PGOOD Low
tPH
Stop Bit to CPU_ON, IO_ON
or CLK_ON High (Note 7)
Toggle SEL to Select New Code
q
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
q
160 500
ns
2
µs
tPL
Stop Bit to CPU_ON, IO_ON
or CLK_ON Low (Note 7)
CL = 0.1µF, 10kΩ Pull-Up, S1 in Figure 1
q
20
50
µs
tPPL
Stop Bit to PGOOD Low (Note 6)
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
q
tVH
VRON High to CPU_ON, IO_ON
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
q
or CLK_ON High
250
ns
2
µs
tVL
VRON Low to CPU_ON, IO_ON,
CL = 0.1µF, 10kΩ Pull-Up, S1 in Figure 1
q
CLK_ON Low
50
µs
tVPL
VRON Low to PGOOD Low
tPGL
PGOOD Low Duration
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1
q
130 500
ns
q 30
50
70
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 VCC = 5V and TA = 25°C.
Note 5: These parameters are guaranteed by design and are not tested in
production. SMBus timing is referenced to VIL and VIH 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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