LTC3633A/LTC3633A-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 12V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
PHMODE Threshold Voltage
PHMODE V
PHMODE V
1
V
V
PHMODE
IH
IL
0.3
V
MODE/SYNC Threshold Voltage
MODE V
MODE V
1
V
V
MODE/SYNC
IH
IL
0.4
SYNC Threshold Voltage
MODE/SYNC Input Current
SYNC V
0.95
V
IH
I
MODE = 0V
MODE = INTV
1.5
–1.5
μA
μA
MODE
CC
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.
(T , in °C) is calculated from the ambient temperature (T , in °C) and
J A
power dissipation (P , in Watts) according to the formula:
D
T = T + (P • θ ), where θ (in °C/W) is the package thermal
J
A
D
JA
JA
impedance.
Note 2: The LTC3633A is tested under pulsed load conditions such
Note 3: This IC includes overtemperature protection that is intended
to protect 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: Output voltages outside the specified range are not optimized for
controlled on-time operation. Refer to the Applications Information section
for further discussions related to the output voltage range.
that T ≈ T . The LTC3633AE is guaranteed to meet specifications from
J
A
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
LTC3633AI is guaranteed over the full –40°C to 125°C operating junction
temperature range. 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. The junction temperature
Note 5: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
3633a1f
4
Linear [ Linear ]
