LTC3589_1 Datasheet, PDF (8/46 Pages) Linear Technology – 8-Output Regulator with Sequencing and I2C

LTC3589
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = PV_IN1 = PV_IN2 = PV_IN3 = PV_IN4 = V_{IN_LDO2} = V_{IN_LDO34}
= DV_DD = 3.8V. All regulators disabled unless otherwise noted.
SYMBOL
V_RSTO
I_RSTO
V_IRQ
I_IRQ
PARAMETER
RSTO Output Low Voltage
RSTO Output High Leakage Current
IRQ Output Low Voltage
IRQ Output High Leakage Current
CONDITIONS
I_RSTO = 3mA
V_RSTO = 3.8V
I_IRQ = 3mA
V_IRQ = 3.8V
MIN
TYP MAX UNITS
0.1
0.4
V
–0.1
0.1
µA
0.1
0.4
V
–0.1
0.1
µA
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 LTC3589 is tested under pulsed load conditions such that T_J ≈
T_A.
The LTC3589E is guaranteed to meet specifications from 0°C to 85°C
junction temperature. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3589I is guaranteed
over the –40°C to 125°C operating junction temperature range and the
LTC3589H is guaranteed over the full –40°C to 150°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes; operating lifetime is derated for junction temperatures greater
than 125°C. The junction temperature (T_J in °C) is calculated from the
ambient temperature (T_A in °C) and power dissipation (PD, in Watts)
according to the formula:
T_J = T_A + (PD • θ_JA), where the package junction to ambient thermal
impedance θ_JA = 34°C/W.
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 impedance and
other environmental factors.
Note 3: The LTC3589 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 150°C when overtemperature protection is active.
Continuous operation above the specified maximum operating temperature
may impair device reliability.
Note 4: Dropout voltage is defined as (V_IN – V_LDO) for LDO1 or
(V_{IN_LDO} – V_LDO) for other LDOs when V_LDO is 3% lower than V_LDO
measured with V_IN = V_{IN_LDO} = 4.3V.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: Soft-start measured in test mode with regulator error amplifier in
unity gain mode.
3589fb
8