Datasheet LTM4641 (Analog Devices) - 7

LTM4641
elecTrical characTerisTics The
l
denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VINH = VINL = 28V, per the typical application shown in Figure 45, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
tUVOVD UVLO/OVLO/IOVRETRY/ TEMP ±50mV Overdrive (All Pins) l 25 100 µs Response Time ±5mV Overdrive, UVLO/OVLO/IOVRETRY Pins 50 125 500 µs Only (Note 4) IUVOV Input Current of UVLO, OVLO and UVLO = 0.55V or OVLO = 0.45V or l ±30 nA IOVRETRY IOVRETRY = 0.45V VHOUSEKEEPING(UVLO) Housekeeping Circuitry UVLO Voltage on INTVCC, INTVCC Rising (Note 4) 1.9 2 2.1 V Hysteresis, INTVCC Returning (Note 4) 5 25 50 mV VHYST(SWITCHING ON) HYST Voltage (MHYST Off, RUN RUN Electrically Open Circuit l 4.9 5.1 5.25 V Logic High) RUN = 1.8V l 1.85 2.1 2.35 V VHYST(SWITCHING OFF, HYST Voltage (MHYST Off, RUN RUN = 0V l 170 350 480 mV RUN) Logic Low) VHYST(SWITCHING OFF, HYST Voltage, Switching Action UVLO < UVOVTH or OVLO > UVOVTH or l 30 65 mV FAULT) Inhibited (MHYST On) IOVRETRY > UVOVTH or TEMP < OTTH(INCEPTION) or CROWBAR > VCROWBAR(TH) or DRVCC < DRVCCUVLO(FALLING) (See Figures 62, 63) TMRUOTO Timeout and Power-On Reset Period CTMR = 1nF, Time from Fault Clearing to HYST l 5 9 14 ms Being Released by Internal Circuitry VLATCH(IH) LATCH Clear Threshold Input High l 1.2 V VLATCH(IL) LATCH Clear Threshold Input Low l 0.8 V ILATCH LATCH Input Current VLATCH = 7.5V l ±1 μA ITMR(UP) TMR Pull-Up Current VTMR = 0V l –1.2 –2.1 –2.8 μA ITMR(DOWN) TMR Pull-Down Current VTMR = 1.6V l 1.2 2.1 2.8 μA VTMR(DIS) Timer Disable Voltage Referenced to INTVCC l –180 –270 mV OTBHVIL OTBH Low Level Input Voltage l 0.4 V OTBHVZ OTBH Pin Voltage When Left –10μA ≤ IOTBH ≤ 10μA l 0.6 0.9 1.2 V Electrically Open Circuit IOTBH(MAX) Maximum OTBH Current OTBH Electrically Shorted to SGND l 30 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings –40°C to 125°C operating junction temperature range are assured by may cause permanent damage to the device. Exposure to any Absolute design, characterization and correlation with statistical process controls. Maximum Rating condition for extended periods may affect device The LTM4641I is guaranteed over the –40°C to 125°C operating junction reliability and lifetime. temperature range. The LTM4641MP is tested and guaranteed over the The LTM4641 SW absolute maximum rating of 40V is verified in ATE by full –55°C to 125°C operating temperature range. Note that the maximum regulating V ambient temperature consistent with these specifications is determined by OUT while at 40VIN, in a controlled manner guaranteed to not affect device reliability or lifetime. Static testing of SW leakage current at specific operating conditions in conjunction with board layout, the rated 40V package thermal impedance and other environmental factors. IN is performed at control IC wafer level only.
Note 2:
The LTM4641 is tested under pulsed load conditions such that
Note 3:
See output current derating curves for different VIN, VOUT and TA. TJ ≈ TA. The LTM4641E is guaranteed to meet performance specifications
Note 4:
100% tested at wafer level only. from 0°C to 125°C junction temperature. Specifications over the 4641fe For more information www.linear.com/LTM4641 7 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information—Power Supply Features Applications Information—Input Protection Features Applications Information—Load Protection Features Applications Information—EMI Performance Applications Information—Multimodule Parallel Operation Applications Information—Thermal Considerations and Output Current Derating Applications Information—Output Capacitance Table Applications Information—Safety and Layout Guidance Typical Applications Appendices Package Description Package Photo Package Description Revision History Typical Application Related Parts