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LTM4677 Datasheet(PDF) 6 Page - Linear Technology |
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LTM4677 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 128 page  LTC3884/LTC3884-1 6 3884fe For more information www.linear.com/LTC3884 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 3). VIN = 12V, EXTVCC = 0V, VRUN0,1 = 3.3V, fSYNC = 500kHz (externally driven) and all programmable parameters at factory default, unless otherwise specified. SYMBOL PARAMETER CONDITION MIN TYP MAX UNITS Input Voltage VIN Input Voltage Range (Note 11) l 4.5 38 V IQ Input Voltage Supply Current VRUN0,1 = 3.3V (Note 16) VRUN0,1 = 0V (Note 16) 25 23 mA mA VUVLO Undervoltage Lockout Threshold When VIN > 4.3V VINTVCC Falling VINTVCC Rising 3.55 3.90 V V tINIT Initialization Time Time from VIN Applied Until the TON_DELAY Timer Starts 35 ms tOFF(MIN) Short Cycle Retry Time 120 ms Control Loop VOUTRL Full-Scale Voltage Range Set Point Accuracy (0.6V ~ 2.5V) Resolution LSB Step Size VOUT_COMMAND = 2.75V, MFR_PWM_MODE[1] = 1 (Notes 9, 10, 13) l l 2.7 –0.5 12 0.688 2.8 0.5 V % Bits mV VOUTRH Full-Scale Voltage Range Set Point Accuracy (0.6V ~ 5.0V) Resolution LSB Step Size VOUT_COMMAND = 5.5V, MFR_PWM_MODE[1] = 0 (Notes 9, 10, 13) l l 5.40 –0.5 12 1.375 5.60 0.5 V % Bits mV VLINEREG Line Regulation 6V < VIN < 38V l ±0.02 %/V VLOADREG Load Regulation ∆VITH = 1.35V ~ 0.7V ∆VITH = 1.35V ~ 2V l l 0.01 –0.01 0.1 –0.1 % % IISENSE0,1 Input Pin Bias Current 0V ≤ VPIN ≤ 5.5V l ±1 ±3 µA VSENSERIN0,1 VSENSE Input Resistance to GND 0V ≤ VPIN ≤ 5.5V 50 kΩ VILIMIT (Note 15) 12 Steps VILIM_HIGH VILIM_LOW VREV MFR_PWM_MODE[7],[2]=0, 1, ILIM[3:0]=1100, VOUT ≤ 3.5V MFR_PWM_MODE[7],[2]=0, 1, ILIM[3:0]=0001, VOUT ≤ 3.5V MFR_PWM_MODE[7],[2]=0, 1, VOUT ≥ VOV l 14.5 16.5 9.5 –7.5 18.5 mV mV mV VILIM_HIGH VILIM_LOW VREV MFR_PWM_MODE[7],[2]=1, 1, ILIM[3:0]=1100,VOUT ≤ 3.5V MFR_PWM_MODE[7],[2]=1, 1, ILIM[3:0]=0001,VOUT ≤ 3.5V MFR_PWM_MODE[7],[2]=1, 1, VOUT ≥ VOV l 27.0 29.5 17.0 –15 31.0 mV mV mV VILIM_HIGH VILIM_LOW VREV MFR_PWM_MODE[7],[2]=0, 0, ILIM[3:0]=1100 MFR_PWM_MODE[7],[2]=0, 0, ILIM[3:0]=0001 MFR_PWM_MODE[7],[2]=0, 0, VOUT ≥ VOV l 35 41.38 25 –18.8 49 mV mV mV VILIM_HIGH VILIM_LOW VREV MFR_PWM_MODE[7],[2]=1, 0, ILIM[3:0]=1100 MFR_PWM_MODE[7],[2]=1, 0, ILIM[3:0]=0001 MFR_PWM_MODE[7],[2]=1, 0, VOUT ≥ VOV l 67.5 74.5 43.5 –37.5 81.5 mV mV mV gm0,1 Resolution Error Amplifier gm(MAX) Error Amplifier gm(MIN) LSB Step Size ITH0,1 = 1.35V, MFR_PWM_COMP[7:5] = 0 to 7 3 5.76 1 0.68 Bits mmho mmho mmho RTH0, 1 Resolution Compensation Resistor RTH(MAX) Compensation Resistor RTH(MIN) MFR_PWM_COMP[4:0] = 0 to 31 (See Figure 37) 5 62 0 Bits kΩ kΩ Gate Drivers (LTC3884) TG RUP TG Pull-Up RDS(ON) TG High 2.6 Ω TG RDOWN TG Pull-Down RDS(ON) TG Low 1.5 Ω BG RUP BG Pull-Up RDS(ON) BG High 2.4 Ω |
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