LTC3675 Datasheet, PDF (7/36 Pages) Linear Technology – 7-Channel Confi gurable High Power PMIC

LTC3675
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX
t_BUF
Bus Free Time Between Stop and Start
1.3
Condition
t_{HD_SDA}
t_{SU_STA}
t_{SU_STO}
t_{HD_DAT(O)}
t_{HD_DAT(I)}
Hold Time After Repeated Start Condition
Repeated Start Condition Set-Up Time
Stop Condition Set-Up Time
Data Hold Time Output
Data Hold Time Input
0.6
0.6
0.6
0
900
0
t_{SU_DAT}
Data Set-Up Time
100
t_LOW
SCL Clock Low Period
1.3
t_HIGH
SCL Clock High Period
0.6
t_f
Clock/Data Fall Time
C_B = Capacitance of One Bus Line (pF)
20 + 0.1C_B
300
t_r
Clock/Data Rise Time
C_B = Capacitance of One Bus Line (pF)
20 + 0.1C_B
300
t_SP
Input Spike Suppression Pulse Width
50
Interface Logic Pins (PBSTAT, WAKE, RSTB, IRQB, ONB)
I_LK(HIGH)
Output High Leakage Current
V_OL
Output Low Voltage
V_ONB(HIGH)
ONB High Threshold
V_ONB(LOW)
ONB Low Threshold
Interface Logic Pins (EN1, EN2, EN3, EN4, ENBB)
3.6V at Pin
3mA into Pin
–1
1
100 400
800 1200
400
700
V_{HI_ALLOFF}
Enable Rising Threshold
V_{EN_HYS}
Enable Falling Hysteresis
V_HI
Enable Rising Threshold
I_EN
Enable Pin Leakage Current
Pushbutton Parameters; CT = 0.01μF
All Regulators and LED Driver Disabled
l 400
At Least One Regulator/LED Driver Enabled l 380
EN = 3.6V
–1
650 1200
60
400 420
1
t_{ONB_LO}
ONB Low Time to PBSTAT Low
WAKE High
28
50
72
t_{ONB_WAKE}
t_{ONB_HR}
t_HR
ONB Low Time to WAKE High
ONB Low to Hard Reset
Time for Which All Enabled Regulators are
Disabled
280
400 520
3.5
5
6.5
0.7
1
1.3
t_{PBSTAT_PW}
t_{WAKE_ON}
PBSTAT Minimum Pulse Width
WAKE High Time
28
50
72
3.5
5
6.5
UNITS
μs
μs
μs
μs
ns
ns
ns
μs
μs
ns
ns
ns
μA
mV
mV
mV
mV
mV
mV
μA
ms
ms
sec
sec
ms
sec
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 LTC3675 is guaranteed to meet performance specifications
from the 0°C to 125°C operating junction temperature range. Specifications
over the –40°C to 125°C operating junction temperature range are assured
by design, characterization and correlation with statistical process controls.
Note 3: The LTC3675 includes overtemperature protection which protects
the device during momentary overload conditions. Junction temperature
will exceed 125°C when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
may impair device reliability.
Note 4: Static current, switches not switching. Actual current may be
higher due to gate charge losses at the switching frequency.
Note 5: Currents measured at a specific V_IN pin. Buck 1 (V_IN, Pin 6);
Buck 2 (V_IN, Pin 7); Buck 3 and Buck 4 (V_IN, Pin 10); Boost and Buck
Boost (V_IN, Pin 34); LED driver (V_IN, Pin 31).
Note 6: The current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the maximum specified pin current rating may result in device
degradation over time.
Note 7: With dual string operation, the LED pin with the lower voltage sets
the regulation point.
3675f
7