Datasheet LTM4651 (Analog Devices) - 3

LTM4651
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal operating temperature range (Note 2). T – A = 25
°
C, Test Circuit 1, VIN = 24V and electrically connected to SVIN and RUN, ISETa – SVOUT = 24V, EXTVCC = PGND, CLKIN open circuit, RfSET = 57.6kΩ and RISET = 480kΩ and voltages referred to PGND unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SV + – IN(DC), VIN(DC) Input DC Voltage VIN |VOUT | ≤ 58V l 3.6 58 V V – – OUT(RANGE) Range of Output Voltage Regulation 0.5V ≤ ISETa – SVOUT ≤ 26.5V l –26.5 –0.5 V V – – OUT(–24VDC) Output Voltage Total Variation with 3.6V ≤ VIN ≤ 34V, 0A ≤ IOUT ≤ 0.3A, CLKIN Driven per l –24.4 –24 –23.6 V Line and Load at V – OUT = –24V Note 6, CINH = 4.7μF, CD = 4.7μF × 2, COUTH = 47μF × 2 V – OUT(–5VDC) Output Voltage Total Variation with Measuring GNDSNS – ISETa l –15 0 15 mV Line and Load at V – – OUT = –5V 12V ≤ VIN ≤ 53V, 0A ≤ IOUT ≤ 3A, CLKIN Driven by 550kHz Clock, CINH = 4.7μF, CD = 4.7μF × 2, COUTH = 47μF × 2, ISETa – SV – OUT = 5V V – OUT(–0.5VDC) Output Voltage Total Variation with Measuring GNDSNS – ISETa l –15 0 15 mV Line and Load at V – – OUT = –0.5V 3.6V ≤ VIN ≤ 28V, 0A ≤ IOUT ≤ 2A, CINH = 4.7μF, CD = 4.7μF × 2, COUTH = 47μF × 2, RfSET = N/U, ISETa – SV – OUT = 500mV, CLKIN Driven by 200kHz Clock (Note 5)
Input Specifications
VIN(UVLO) SVIN Undervoltage Lockout Threshold SVIN Rising l 3.2 3.6 V SVIN Falling l 2.1 2.5 2.8 V Hysteresis l 400 700 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 × 2, COUTH = 47μF × 2; 1.1 A I – OUT = 0A, ISETa Electrically Connected to ISETb IQ(SVIN) Input Supply Bias Current Shutdown, RUN = GND 16 30 μA RUN = VIN 450 μA I – S(VIN) Input Supply Power Converter CLKIN Open Circuit, IOUT = 2A 2.3 A IS(VIN, SHUTDOWN) Input Supply Current in Shutdown Shutdown, RUN = GND 4 µA
Output Specifications
I – – – OUT VOUT Output Continuous From VIN = 24V, Regulating VOUT = –24V at fSW = 1.5MHz 0 2 A Current Range From V – IN = 12V, Regulating VOUT = –5V at fSW = 550kHz 0 3 A (See Note 3, Capable of Up to 4A Output Current for Some Combinations of V – IN, VOUT , and fSW) ∆V – – – – OUT(LINE) /VOUT Line Regulation Accuracy IOUT = 0A, 3.6V ≤ VIN ≤ 34V, ISETa – SVOUT = 24V, l 0.05 0.25 % CLKIN Driven by 1.8MHz Clock ∆V – – – OUT(LOAD) /VOUT Load Regulation Accuracy VIN = 24V, 0A ≤ IOUT ≤ 2A, CLKIN Driven by 1.5MHz l 0.05 0.5 % Clock, RfSET = 57.6kΩ, and RISET = 480kΩ V – – – OUT(AC) Output Voltage Ripple, VOUT VIN = 12V, ISETa – SVOUT = 5V 10 mVP–P f – s VOUT Ripple Frequency VIN = 12V, ISETa – SVOUT = 5V l 1.7 1.95 2.2 MHz ∆V – OUT(START) Turn-On Overshoot 8 mV tSTART Turn-On Start-Up Time Delay Measured from VIN Toggling from 0V to 24V to l 4 9 ms PGOOD Exceeding 3V Above GND; PGOOD Having a 100kΩ Pull-Up to 3.3V with Respect to GND, VPGFB Resistor-Divider Network as Shown in Test Circuit 1, RISETa = 480kΩ, ISETa Electrically Connected to ISETb, and CLKIN Driven with 1.2MHz Clock ∆V – – OUT(LS) Peak Output Voltage Deviation for IOUT : 0A to 1A and 1A to 0A Load Steps in 1μs, 400 mV Dynamic Load Step COUTH = 47µF × 2 X5R t – SETTLE Settling Time for Dynamic Load Step IOUT : 0A to 0.5A and 0.5A to 0A Load Steps in 1μs, 50 µs COUTH = 47µF × 2 X5R 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 Simplified Block Diagram Test Circuit Decoupling Requirements Operation Applications Information Typical Applications Package Photograph Package Description Typical Application Related Parts