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LTM4644 Datasheet(PDF) 3 Page - Linear Technology |
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LTM4644 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTM4634 3 4634f For more information www.linear.com/LTM4634 elecTrical characTerisTics The l denotes the specifications which apply over the specified internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 24V, per the typical application for each regulator channel. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Input DC Voltage CNTL_PWR Powered Tied to Input Supply l 4.75 28 V VOUT(RANGE) Output Voltage Range VOUT1, VOUT2 Output Voltage Range VOUT3 l l 0.8 0.8 5.5 13.5 V V VOUT(DC) Output Voltage, Total Variation with Line and Load, VOUT1, VOUT2, VOUT3 CIN = 22µF × 3, COUT = 100µF Ceramic × 3, RFB = 11.5k, MODE/PLLIN = 0V, VIN = 5.5V to 28V, IOUT1,2 = 0A to 5A, IOUT3 = 0A to 4A (Note 4) l 4.925 5.0 5.075 V Input Specifications VRUN RUN1, RUN2, RUN3 Pin ON Threshold VRUN Rising 1.15 1.3 1.4 V VRUN(HYS) RUN Pin Hysteresis 175 mV IQ(VIN) Input Supply Bias Current Each Channel VOUT = 5V, Burst Mode Operation, IOUT = 0A VOUT = 5V, Pulse-Skipping Mode, IOUT = 0A VOUT = 5V, Switching Continuous, IOUT = 0A Shutdown, RUN = 0V, VIN = 24V 0.5 1.6 45 10 mA mA mA µA IS(VIN) Input Supply Current Each Channel VIN = 12V, EXTVCC = 5VOUT VOUT1,2 = 5V, VOUT3 = 5V IOUT1,2 = 5A 2.21 A IOUT3 = 4A 1.76 A Output Specifications (Note 4) IOUT(DC) Output Continuous Current Range Each Channel VOUT1,2 = 5V VOUT3 = 5V 0 0 5 4 A A ∆VOUT(LINE) VOUT Line Regulation Accuracy per Channel VOUT1 = VIN from 5.5V to 28V IOUT = 0A, CNTL_PWR Tie to VIN l 0.015 0.02 %/V ∆VOUT(LOAD) VOUT Load Regulation Accuracy per Channel VOUT = 5V, IOUT1,2 = 0A to 5A Ch1, Ch2, IOUT3 = 0A to 4A l 0.3 0.5 % VOUT(AC) Output Ripple Voltage per Channel IOUT = 0A, COUT = 100µF Ceramic × 3, VIN = 24V, VOUT = 5V 75 mV ∆VOUT(START) Turn-On Overshoot per Channel COUT = 100µF Ceramic × 3, VOUT = 5V, IOUT = 0A, TK/SS = 0.01µF 50 mV tSTART Turn-On Time per Channel COUT = 100µF Ceramic × 3, VOUT = 5V, IOUT = 0A, TK/SS = 0.01µF 6 ms VOUTLS Peak Deviation for Dynamic Load per Channel Load: 0% to 50% to 0% of Full Load, COUT = 100µF Ceramic × 3, VOUT = 5V Typical Bench Data 200 mV tSETTLE Settling Time for Dynamic Load Step per Channel Load: 0% to 50% to 0% of Full Load, COUT = 100µF Ceramic × 3, VOUT = 5V Typical Bench Data 50 µs IOUT(PK) Output Current Limit per Channel VOUT = 5V 8 A Control Specifications VFB Voltage at VFB Pin per Channel IOUT = 0A, VOUT = 5V l 0.794 0.792 0.80 0.80 0.806 0.808 V V IFB Current at VFB Pin per Channel (Note 3) –10 –50 nA VOVL Feedback Overvoltage Lockout per Channel l 0.84 0.86 0.88 V ITK/SS Track Pin Soft-Start Pull-Up Current per Channel TK/SS = 0V 1.1 1.5 1.9 µA tON(MIN) Minimum On-Time (Note 3) 90 ns Max DC Maximum Duty Cycle 5.5V to 5V at 5A (Note 5) 95 % RFBHI Resistor Between VOUT and VFB Pins 60.0 60.4 60.8 kΩ |
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