Datasheet LTM4641 (Analog Devices) - 5

LTM4641
e lecTrical 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
IOUT(PK) Output Current Limit 5.1kΩ Pull-Up from PGOOD to 5V Source, IOUT 24 A Ramped Up Until VOUT Below PGOOD Lower Threshold, PGOOD Pulls Logic Low IVINH(IOUT_SHORT) Power Stage Input Current During VOUT Electrically Shorted to GND 45 mA Output Short Circuit
Control Section
VFB Differential Feedback Voltage from IOUT = 0A l 591 600 609 mV V + – OSNS to VOSNS ITRACK/SS TRACK/SS Pull-Up Current VTRACK/SS = 0V –0.45 –1 μA VFCB FCB Threshold 0.76 0.8 0.84 V IFCB FCB Pin Current VFCB = 0.8V 0 ±1 μA tON(MIN) Minimum On-Time (Note 4) 43 75 ns tOFF(MIN) Minimum Off-Time (Note 4) 220 300 ns V + – OSNS(DM) Remote Sense Pin-Pair Differential Valid Differential VOSNS -to- VOSNS Range l 0 2.7 V Mode Input Range (Use RSET1A = RSET1B ≤ 8.2k) V – OSNS(CM) Remote Sense Pin-Pair Common Valid VOSNS Common Mode Range l –0.3 V Mode Input Range Valid V + OSNS Common Mode Range l 3 V (Use RSET1A = RSET1B ≤ 8.2k) R + IN(VOSNS+) Input Resistance VOSNS to GND 16318 16400 16482 Ω
INTVCC, DRVCC, 1VREF
VINTVCC Internal VCC Voltage 6V ≤ VIN ≤ 38V, INTVCC Not Connected to DRVCC, l 5.1 5.3 5.4 V DRVCC = 5.3V ∆VINTVCC(LOAD) INTVCC Load Regulation RUN = 0V, INTVCC Not Connected to DRVCC, DRV VINTVCC CC = 5.3V and: IINTVCC Varied from 0mA to –20mA –0.7 ±2 % IINTVCC Varied from 0mA to –30mA –1 ±3 % VINTVCC(LOWLINE) INTVCC Voltage at Low Line VIN = 4.5V, RSET1A = RSET1B = 0Ω (~0.6VOUT, l 4.2 4.3 V RfSET Value Recommended in Table 1) DRVCC(UVLO) DRVCC Undervoltage Lockout DRVCC Rising l 3.9 4.05 4.2 V DRVCC Falling l 3.2 3.35 3.5 V IDRVCC DRVCC Current INTVCC Not Connected to DRVCC, DRVCC = 5.3V, RSET1A, RSET1B and RSET2 Setting VOUT to: 1.8VOUT, RfSET = 2MΩ, 0A ≤ IOUT ≤ 10A 11 18 mA 6.0VOUT, RfSET = Open, 0A ≤ IOUT ≤ 10A 20 27 mA (Use RSET1A = RSET1B ≤ 8.2k) V1VREF(DC) 1VREF DC Voltage Regulation I1VREF = 0mA l 0.985 1.000 1.015 V I1VREF = ±1mA l 0.980 1.000 1.020 V
PGOOD Output
V + – PGOOD(TH) Power Good Window, Logic State Ramping Differential VOSNS – VOSNS Voltage: Transition Thresholds Up, PGOOD Goes Logic Low → High 533 556 579 mV Up, PGOOD Goes Logic High → Low 645 660 675 mV Down, PGOOD Goes Logic Low → High 621 644 667 mV Down, PGOOD Goes Logic High → Low 525 540 555 mV V + – PGOOD(HYST) Hysteresis Differential VOSNS – VOSNS Voltage Returning 8 16 24 mV VPGOOD(VOL) Logic-Low Output Voltage IPGOOD = 5mA l 75 400 mV t + – PGOOD(DELAY) PGOOD Logic-Low Blanking Time Delay Between Differential VOSNS – VOSNS 12 μs Voltage Exiting PGOOD Valid Window to PGOOD Going Logic Low (Note 4) 4641fe For more information www.linear.com/LTM4641 5 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