Datasheet LTC3838-2 (Analog Devices) - 5

LTC3838-2
elecTrical characTerisTics Note 1:
Stresses beyond those listed under Absolute Maximum Ratings rated junction temperature will be exceeded when this protection is active. may cause permanent damage to the device. Exposure to any Absolute Continuous operation above the specified absolute maximum operating Maximum Rating condition for extended periods may affect device junction temperature may impair device reliability or permanently damage reliability and lifetime. the device.
Note 2:
The junction temperature (TJ, in °C) is calculated from the ambient
Note 5:
The LTC3838-2 is tested in a feedback loop that adjusts voltages temperature (T + + A, in °C) and power dissipation (PD, in Watts) according to on VOUTSENSE1 and VDFB2 pins to achieve specified error amplifier output the formula: voltages (ITH1,2). TJ = TA + (PD • θJA) In order to simplify the total system error computation, the regulated where θ voltage is defined in one combined specification which includes the effects JA (in °C/W) is the package thermal impedance.
Note 3:
The LTC3838-2 is tested under pulsed load conditions such that T of line, load and common mode variation. The combined regulated voltage J ≈ T specification is tested by independently varying line, load, and common A. The LTC3838E-2 is guaranteed to meet specifications over the 0°C to 85°C operating junction temperature range. Specifications over the –40°C mode, which by design do not significantly affect one another. For any to 125°C operating junction temperature range are assured by design, combination of line, load, and common mode variation, the regulated characterization and correlation with statistical process controls. The voltage should be within the limits specified that are tested in production LTC3838I-2 is guaranteed to meet specifications over the –40°C to 125°C to the following conditions: operating junction temperature range . Note that the maximum ambient Line: V – – IN = 4.5V to 38V, ITH = 1.2V, VOUTSENSE1 = 0V, VDFB2 = 0V temperature consistent with these specifications is determined by specific Load: V – – IN = 15V, ITH = 0.5V to 1.9V, VOUTSENSE1 = 0V, VDFB2 = 0V operating conditions in conjunction with board layout, the rated package Common mode: V – IN = 15V, ITH = 1.2V, VOUTSENSE1 = ±0.5V, ±0.2V, thermal impedance and other environmental factors. V – DFB2 = ±0.2V
Note 4:
This IC includes overtemperature protection that is intended to
Note 6:
Delay times are measured with top gate (TG) and bottom gate protect the device during momentary overload conditions. The maximum (BG) driving minimum load, and using 50% levels. 38382fa For more information www.linear.com/3838-2 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts