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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LTM4653 데이터시트(PDF) 3 Page - Linear Technology |
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LTM4653 데이터시트(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTM4653 3 Rev 0 For more information www.analog.com The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). TA = 25°C, Test Circuit, VIN = SVIN = 48V, EXTVCC = 24V, RUN = 3.3V, RISET = 480k, RfSET = 57.6kΩ, fSW = 1.5MHz (CLKIN driven with 1.2MHz clock signal) unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SVIN(DC), VIN(DC) Input DC Voltage l 3.1 58 V VOUT(RANGE) Range of Output Voltage Regulation 0.5V ≤ ISETa - SGND ≤ 0.94VIN, IOUT = 0A (See Note 6) l 0.5 0.94VIN V VOUT(24VDC) Output Voltage Total Variation with Line and Load at VOUT = 24V 28V ≤ VIN ≤ 58V, 0A ≤ IOUT ≤ 4A, CINH = 4.7μF, CD = 4.7μF, COUTH = 2 × 47μF, CLKIN driven with 1.5MHz Clock l 23.6 24 24.4 V VOUT(0.5VDC) Output Voltage Total Variation with Line and Load at VOUT = 0.5V Measuring VOSNS - ISETa 3.1V ≤ VIN ≤ 13.2V, 0A ≤ IOUT ≤ 4A, CINH = 4.7μF, CD = 4.7μF, COUTH = 2 × 47μF, ISETa = 500mV, RfSET = N/U (Note 5) l –15 0 15 mV Input Specifications VIN(UVLO) SVIN Undervoltage Lockout Threshold SVIN Rising SVIN Falling Hysteresis l l l 2.4 150 2.85 2.6 250 3.1 2.9 V V mV VIN(OVLO) SVIN Overvoltage Lockout Rising (Note 4) 64 68 V VIN(HYS) SVIN Overvoltage Lockout Hysteresis (Note 4) 2 4 V IINRUSH(VIN) Input Inrush Current at Start-Up CINH = 4.7μF, CD = 4.7μF, COUTH = 2 × 47μF; IOUT = 0A, ISETa Electrically Connected to ISETb 300 mA IQ(SVIN) Input Supply Bias Current Shutdown, RUN = GND RUN = VIN 16 450 30 μA μA IS(VIN, FCM) Input Supply Current CLKIN Open Circuit, IOUT = 4A 2.1 A IS(VIN, SHUTDOWN) Input Supply Current in Shutdown Shutdown, RUN = GND 4 µA Output Specifications IOUT VOUT Output Continuous Current Range (Note 3) 0 4 A ∆VOUT(LINE)/VOUT Line Regulation Accuracy IOUT = 0A, 28V ≤ VIN ≤58V l 0.05 0.1 % ∆VOUT(LOAD)/VOUT Load Regulation Accuracy VIN = 48V, 0A ≤ IOUT ≤ 4A l 0.05 0.75 % VOUT(AC) Output Voltage Ripple, VOUT VIN = 12V, ISETa = 5V 2 mVP–P fs VOUT Ripple Frequency ISETa = 5V, RfSET = 57.6k, CLKIN Open Circuit l 1.7 1.95 2.2 MHz ∆VOUT(START) Turn-On Overshoot 8 mV tSTART Turn-On Start-Up Time Delay Measured from VIN Toggling from 0V to 48V to PGOOD Exceeding 3V; PGOOD Having a 100k Pull-Up to 3.3V, VPGFB Resistor-Divider Network as Shown in Test Circuit, RISETa = 480k, ISETa Electrically Connected to ISETb and CLKIN Driven with 1.5MHz Clock l 4 9 ms ∆VOUT(LS) Peak Output Voltage Deviation for Dynamic Load Step IOUT: 0A to 2A and 2A to 0A Load Steps in 1μs, COUTH = 47µF × 2 400 mV tSETTLE Settling Time for Dynamic Load Step IOUT: 0A to 2A and 2A to 0A Load Steps in 1μs, COUTH = 47µF × 2 50 µs IOUT(OCL) IOUT– Output Current Limit 5.5 A Control Section IISETa Reference Current of ISETa Pin VISETa = 0.5V, 3.1V ≤ VIN ≤ 13.2V VISETa = 24V, 28V ≤ VIN ≤ 58V l l 49.3 49 50 50 50.7 51 µA µA IVOSNS VOSNS Leakage Current VIN = SVIN = RUN = ISETa = 58V 600 µA tON(MIN) Minimum On-Time (Note 4 ) 60 ns ELECTRICAL CHARACTERISTICS |
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