Datasheet LTM4641 (Analog Devices) - 6

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 Power-Interrupt MOSFET Drive
VVING Gate Drive Voltage for Power- VIN = 4.5V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA l 11.5 13.3 15.5 V Interrupt MOSFET, MSP VIN = 28V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA l 35 38.4 41 V VIN = 38V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA l 45 48.4 51.5 V VIN = 4V (Ramped Down from 4.5V), IOUT = 0A, l 10.5 11.5 14.2 V VING Sourcing 1µA IVING(UP) VING Pull-Up Current VING Tied to VINGP, and: VIN = 4.5V, VING Pulled to 6.5V l 350 475 600 µA VIN = 28V, VING Pulled to 30V l 425 550 675 µA IVING_DOWN(CROWBAR VING Pull-Down Current VING Tied to VINGP, Pulled to 33V, and: ACTIVE,CROWBAR RUN Pulled to 0V (CROWBAR Inactive) l 3 20 30 mA INACTIVE) OVPGM Pulled to 0V (CROWBAR Active) l 24 27 30 mA tVING(OVP_DELAY) VING OVP Pull-Down Delay OVPGM Driven from 650mV to 550mV, VING l 1.3 2.6 µs Discharge Response Time IVINGP(LEAK) Zener Diode Leakage Current VINGP Driven to (VINH + 10V) 1 nA VINGP(CLAMP) Zener Diode Breakdown Voltage VINGP-to-VINH Differential Voltage; IVINGP = 5mA 15 V
Fault Pins and Functions
VOVPGM Default Output Overvoltage Program OVPGM Electrically Open Circuit l 650 666 680 mV Setting IOVPGM(UP) OVPGM Pull-Up Current OVPGM = 0V l –2.07 –2 –1.91 μA IOVPGM(DOWN) OVPGM Pull-Down Current OVPGM = 1V l 0.945 1 1.06 μA OVP + – TH Output Overvoltage Protection Ramping Up Differential VOSNS -to-VOSNS l 647 666 683 mV Inception Threshold Voltage Until CROWBAR Outputs Logic High OVPERR Output Overvoltage Protection Difference Between OVPTH and VOVPGM l –12 0 12 mV Inception Error (OVPTH-VOVPGM) tCROWBAR(OVP_DELAY) CROWBAR Response Time OVPGM Driven from 650mV to 550mV l 400 500 ns VCROWBAR(OH) CROWBAR Output, Active High OVPGM Pulled to 0V and: Voltage ICROWBAR = –100μA, IINTVCC = –20mA l 4.3 4.65 5 V ICROWBAR = –4mA, IINTVCC = –20mA l 4.2 4.55 4.9 V VCROWBAR(OL) CROWBAR Output, Passive Low ICROWBAR = 1μA l 260 500 mV Voltage VCROWBAR(OVERSHOOT) CROWBAR Peak Voltage Overshoot VINL Ramped Up from/Down to 0V l 550 900 mV at VINL Start-Up and Shutdown VCROWBAR(TH) CROWBAR Latchoff Threshold CROWBAR Ramped Up Until HYST Goes Logic l 1.4 1.5 1.6 V Low VTEMP TEMP Voltage RUN = 0V, TA = 25°C 950 980 1010 mV RUN = 0V, TA = 125°C 585 mV (See Figure 10 for Reference) OTTH(INCEPTION) TEMP Overtemperature Inception Ramping TEMP Downward Until HYST Outputs l 428 438 448 mV Threshold Logic Low OTTH(RECOVER) TEMP Overtemperature Recovery Ramping TEMP Upward Until HYST Outputs l 501 514 527 mV Threshold Logic High UVOVTH UVLO/OVLO/IOVRETRY Ramping UVLO, OVLO or IOVRETRY Positive l 488 500 512 mV Undervoltage/Overvoltage Inception Until HYST Toggles Its State Thresholds 4641fe 6 For more information www.linear.com/LTM4641 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