Datasheet LTC3863 (Analog Devices) - 4

LTC3863
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 4) VIN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Gate Driver
VCAP Gate Bias LDO Output Voltage (VIN-VCAP) IGATE = 0mA l 7.6 8.0 8.5 V VCAPDROP Gate Bias LDO Dropout Voltage VIN = 5V, IGATE = 15mA 0.2 0.5 V ∆VCAP(LINE) Gate Bias LDO Line Regulation 9V ≤ VIN ≤ 60V, IGATE = 0mA 0.002 0.03 %/V ∆VCAP(LOAD) Gate Bias LDO Load Regulation Load = 0mA to 20mA –3.5 % RUP Gate Pull-Up Resistance Gate High 2 Ω RDN Gate Pull-Down Resistance Gate Low 0.9 Ω
Overvoltage
VFBOV VFB Overvoltage Lockout Threshold GATE Going High without Delay, 10 % VFB(OV)-VFB(NOM) in Percent
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings specifications over the –40°C to 125°C operating junction temperature may cause permanent damage to the device. Exposure to any Absolute range are assured by design, characterization and correlation with Maximum Rating condition for extended periods may affect device statistical process controls. The LTC3863I is guaranteed to meet reliability and lifetime. performance specifications over the –40°C to 125°C operating junction
Note 2:
Continuous operation above the specified maximum operating temperature range, the LTC3863H is guaranteed over the –40°C to 150°C junction temperature may impair device reliability or permanently damage operating junction temperature range, and the LTC3863MP is guaranteed the device. and tested over the full –55°C to 150°C operating junction temperature
Note 3:
The junction temperature (T range. High junction temperatures degrade operating lifetimes; operating J in °C) is calculated from the ambient temperature (T lifetime is derated for junction temperatures greater than 125°C. The A in °C) and power dissipation (PD in Watts) as follows: maximum ambient temperature consistent with these specifications is TJ = TA + (PD • θJA) determined by specific operating conditions in conjunction with board where θJA (in °C/W) is the package thermal impedance provided in the Pin layout, the rated package thermal impedance and other environmental Configuration section for the corresponding package. factors.
Note 4:
The LTC3863 is tested under pulsed load conditions such that TJ
Note 5:
The LTC3863 is tested in a feedback loop that adjust V ≈ T REG A. The LTC3863E is guaranteed to meet performance specifications or (V from 0°C to 85°C operating junction temperature range. The LTC3863E FB – VFBN) to achieve a specified error amplifier output voltage (on ITH pin). Rev. B 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts