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LTM4677 Datasheet(PDF) 6 Page - Analog Devices |
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LTM4677 Datasheet(HTML) 6 Page - Analog Devices |
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6 / 110 page  LTC3888-1 6 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Supply VIN VIN Operating Range l 4.5 26.5 V IQ IC Operating Current RUN0,1 = 0V RUN0,1 = 3.3V, CPWMn = 0pF 24 28 mA mA INTVCC Linear Regulator Supply INTVCC INTVCC Output Voltage VIN ≥ 6V (Note 4) 5.2 V EXTVCC INTVCC Input Voltage Range VIN = INTVCC (Note 4) l 4.5 5.5 V V5UVLO PWM Undervoltage Lockout Threshold VDD33 Rising Hysteresis l 300 4.45 V mV VDD33 Linear Regulator Supply VDD33 VDD33 Output Voltage INTVCC ≥ 4.5V (Note 5) l 3.15 3.3 3.45 V V3UVLO PMBus Undervoltage Lockout Threshold VDD33 Rising Hysteresis l 275 3.10 V mV VDD25 Linear Regulator VDD25 VDD25 Output Voltage (Note 7) 2.5 V PWM Control Loops VFB Regulated Feedback Voltage VOUT_SCALE_LOOP Not Programmed 400 mV IFB VFB Input Current VFB = 0.4V l –100 100 nA VOUT Accuracy without Servo (Note 10) Accuracy with Servo (Notes 9, 10, See Test Circuit) Servo Resolution 1V ≤ VOUT ≤ 3.45V 0.3V ≤ VOUT ≤ 3.45V 0.3V ≤ VOUT ≤ 3.45V l l –1.5 –0.5 ±0.2 12 1.5 0.5 % % % Bits RVSENSE VSENSE Input Resistance l 30 43.3 kΩ VLINEREG Line Regulation 6V ≤ VIN ≤ 24V (Note 10) –0.02 0.02 %/V VLOADREG Load Regulation ΔITHn = ±600mV (Note 10) –0.1 0.1 % gm Resolution Error Amplifier gm(MAX) Error Amplifier gm(MIN) LSB Step Size ITH = 1.35V 3 5.76 1 0.68 Bits mmho mmho mmho RITH Resolution (nonlinear) Compensation Resistance RTH(MAX) Compensation Resistance RTH(MIN) 5 62 1 Bits kΩ kΩ ISHARE_TOL Phase-to-Phase Output Current Sharing Accuracy ISENSEn – IREF ≥ 150mV l –6.5 ±3 6.5 % % IISENSE ISENSEn Input Current 1.5V ≤ ISENSEn ≤ 1.9V l –1 3 µA VIREF Current Monitor Reference Output Voltage IIREF = 3mA (Note 6) 1.52 1.68 V IIREF IREF Output Current Source, IREF ≥ 1.52V Sink, IREF ≤ 1.68V 10 –500 µA mA fSYNC SYNC Output Frequency Accuracy l –7.5 7.5 % tON(MIN) Minimum On-Time MFR_PWM_MODE_LTC3888-1[3] = 1 MFR_PWM_MODE_LTC3888-1[3] = 0 l 30 21 60 ns ns The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 8). VIN = 12V, VSENSEn+ = 1V, VSENSEn– = GND = 0V, fSYNC = 500kHz (externally driven) unless otherwise specified. |
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