Datasheet LTC3864 (Analog Devices) - 4

LTC3864
elecTrical characTerisTics The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4) VIN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RUP Gate Pull-Up Resistance Gate High 2 Ω RDN Gate Pull-Down Resistance Gate Low 0.9 Ω
PGOOD and Overvoltage
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.2 0.4 V IPG PGOOD Leakage Current VPGOOD = 5V 1 µA %PGD PGOOD Trip Level VFB Ramping Negative with Respect to VREG –13 –10 –7 % Hysteresis 2.5 % VFB Ramping Positive with Respect to VREG 7 10 13 % Hysteresis 2.5 % tPGDLY PGOOD Delay PGOOD Going High to Low 100 µs PGOOD Going Low to High 100 µs 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 statistical Maximum Rating condition for extended periods may affect device process controls. The LTC3864I is guaranteed to meet performance reliability and lifetime. specifications over the –40°C to 125°C operating junction temperature
Note 2:
Continuous operation above the specified maximum operating range, the LTC3864H is guaranteed over the –40°C to 150°C operating junction temperature may impair device reliability or permanently damage junction temperature range, and the LTC3864MP is guaranteed and tested the device. over the full –55°C to 150°C operating junction temperature range. High
Note 3:
The junction temperature (T junction temperatures degrade operating lifetimes; operating lifetime is J in °C) is calculated from the ambient temperature (T derated for junction temperatures greater than 125°C. The maximum A in °C) and power dissipation (PD in Watts) as follows: ambient temperature consistent with these specifications is determined by TJ = TA + (PD • θJA) specific operating conditions in conjunction with board layout, the rated where θJA (in °C/W) is the package thermal impedance provided in the Pin package thermal impedance and other environmental factors. Configuration section for the corresponding package.
Note 5:
The LTC3864 is tested in a feedback loop that adjust V
Note 4:
The LTC3864 is tested under pulsed loading conditions such that FB to achieve a specified error amplifier output voltage (on ITH pin). TJ ≈ TA. The LTC3864E is guaranteed to meet performance specifications from 0°C to 85°C operating junction temperature range. The LTC3864E 3864fa 4 For more information www.linear.com/LTC3864 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts