LTM4653 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internaloperating 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. SYMBOLPARAMETERCONDITIONSMINTYPMAX 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 28V ≤ VIN ≤ 58V, 0A ≤ IOUT ≤ 4A, CINH = 4.7μF, l 23.6 24 24.4 V Line and Load at VOUT = 24V CD = 4.7μF, COUTH = 2 × 47μF, CLKIN driven with 1.5MHz Clock VOUT(0.5VDC) Output Voltage Total Variation with Measuring VOSNS - ISETa l –15 0 15 mV Line and Load at VOUT = 0.5V 3.1V ≤ VIN ≤ 13.2V, 0A ≤ IOUT ≤ 4A, CINH = 4.7μF, CD = 4.7μF, COUTH = 2 × 47μF, ISETa = 500mV, RfSET = N/U (Note 5) Input Specifications VIN(UVLO) SVIN Undervoltage Lockout Threshold SVIN Rising l 2.85 3.1 V SVIN Falling l 2.4 2.6 2.9 V Hysteresis l 150 250 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, 300 mA ISETa Electrically Connected to ISETb IQ(SVIN) Input Supply Bias Current Shutdown, RUN = GND 16 30 μA RUN = VIN 450 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 (Note 3) 0 4 A Range ∆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 l 4 9 ms 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 ∆VOUT(LS) Peak Output Voltage Deviation for IOUT: 0A to 2A and 2A to 0A Load Steps in 1μs, 400 mV Dynamic Load Step COUTH = 47µF × 2 tSETTLE Settling Time for Dynamic Load Step IOUT: 0A to 2A and 2A to 0A Load Steps in 1μs, 50 µs COUTH = 47µF × 2 I – OUT(OCL) IOUT Output Current Limit 5.5 A Control Section IISETa Reference Current of ISETa Pin VISETa = 0.5V, 3.1V ≤ VIN ≤ 13.2V l 49.3 50 50.7 µA VISETa = 24V, 28V ≤ VIN ≤ 58V l 49 50 51 µA IVOSNS VOSNS Leakage Current VIN = SVIN = RUN = ISETa = 58V 600 µA tON(MIN) Minimum On-Time (Note 4 ) 60 ns Rev. A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Test Circuit Decoupling Requirements Operation Operation Operation Applications Information Typical Applications Package Photograph Package Description Typical Application Related Parts
