Datasheet LTC3417A-2 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
| 页数 / 页 | 20 / 3 — The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 345 Kb |
| 文件语言 | 英语 |
The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply over the full operating
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LTC3417A-2
The ELECTRICAL CHARACTERISTICS
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V unless otherwise specifi ed (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN1, VIN2 Operating Voltage Range VIN1 = VIN2 2.25 5.5 V IFB1, IFB2 Feedback Pin Input Current VIN = 6V Pin Under Test = 3V ± 0.1 μA VFB1, VFB2 Feedback Voltage (Note 3) l 0.784 0.8 0.816 V ΔVLINEREG Reference Voltage Line Regulation. %/V VIN = 2.25V to 5V (Note 3) 0.02 0.2 %/V is the Percentage Change in VOUT with a Change in VIN ΔVLOADREG Output Voltage Load Regulation ITH1, ITH2 = 0.36V (Note 3) 0.02 0.2 % ITH1, ITH2 = 0.84V (Note 3) –0.02 –0.2 % gm(EA) Error Amplifi er Transconductance ITH1, ITH2(PINLOAD) = ±5μA (Note 3) 1400 μS IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.75V, VSYNC/MODE = VIN, 400 600 μA VRUN1 = VRUN2 = VIN IS Half Active Mode (VRUN2 = 0V, 1.5A Only) VFB1 = 0.75V, VSYNC/MODE = VIN, VRUN1 = VIN 260 400 μA Half Active Mode (VRUN1 = 0V, 1A Only) VFB2 = 0.75V, VSYNC/MODE = VIN, VRUN2 = VIN 260 400 μA Both Channels in Sleep Mode VFB1 = VFB2 = 1V, VSYNC/MODE = VIN, VRUN1 = 125 250 μA VRUN2 = VIN Shutdown VRUN1 = VRUN2 = 0V 0.01 1 μA fOSC Oscillator Frequency VFREQ = VIN 1.2 1.5 1.8 MHz VFREQ: RT = 143k 0.85 1 1.25 MHz VFREQ: Resistor (Note 6) 4 MHz ILIM1 Peak Switch Current Limit on SW1 (1.5A) 2.1 2.5 A ILIM2 Peak Switch Current Limit on SW2 (1A) 1.4 1.7 A RDS(ON)1 SW1 Top Switch On-Resistance (1.5A) VIN1 = 3.6V (Note 5) 0.088 Ω SW1 Bottom Switch On-Resistance VIN1 = 3.6V (Note 5) 0.084 Ω RDS(ON)2 SW2 Top Switch On-Resistance (1A) VIN2 = 3.6V (Note 5) 0.16 Ω SW2 Bottom Switch On-Resistance VIN2 = 3.6V (Note 5) 0.15 Ω ISW1(LKG) Switch Leakage Current SW1 (1.5A) VIN1 = 6V, VITH1 = 0V, VRUN1 = 0V 0.01 1 μA ISW2(LKG) Switch Leakage Current SW2 (1A) VIN2 = 6V, VITH2 = 0V, VRUN2 = 0V 0.01 1 μA VUVLO Undervoltage Lockout Threshold VIN1, VIN2 Ramping Down 1.9 2.07 2.2 V VIN1, VIN2 Ramping Up 1.95 2.12 2.25 V TPGOOD Threshold for Power Good. Percentage VFB1 or VFB2 Ramping Up –6 % Deviation from VFB Steady State VFB1 or VFB2 Ramping Down –6 % (Typically 0.8V) RPGOOD Power Good Pull-Down On-Resistance 120 300 Ω VRUN1, VRUN2 RUN1, RUN2 Threshold 0.3 0.85 1.5 V VPHASE PHASE Threshold High-CMOS Levels VIN –0.5 V PHASE Threshold Low-CMOS Levels 0.5 V IRUN1, IRUN2, IPHASE, RUN1, RUN2, PHASE and SYNC/MODE VIN = 6V, Pin Under Test = 3V ±0.01 ±1 μA ISYNC/MODE Leakage Current VTLSYNC/MODE SYNC/MODE Threshold Voltage Low 0.5 V VTHSYNC/MODE SYNC/MODE Threshold Voltage High VIN –0.5 V VTHFREQ FREQ Threshold Voltage High VIN –0.5 V 3417a2fa 3
The ELECTRICAL CHARACTERISTICS
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V unless otherwise specifi ed (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN1, VIN2 Operating Voltage Range VIN1 = VIN2 2.25 5.5 V IFB1, IFB2 Feedback Pin Input Current VIN = 6V Pin Under Test = 3V ± 0.1 μA VFB1, VFB2 Feedback Voltage (Note 3) l 0.784 0.8 0.816 V ΔVLINEREG Reference Voltage Line Regulation. %/V VIN = 2.25V to 5V (Note 3) 0.02 0.2 %/V is the Percentage Change in VOUT with a Change in VIN ΔVLOADREG Output Voltage Load Regulation ITH1, ITH2 = 0.36V (Note 3) 0.02 0.2 % ITH1, ITH2 = 0.84V (Note 3) –0.02 –0.2 % gm(EA) Error Amplifi er Transconductance ITH1, ITH2(PINLOAD) = ±5μA (Note 3) 1400 μS IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.75V, VSYNC/MODE = VIN, 400 600 μA VRUN1 = VRUN2 = VIN IS Half Active Mode (VRUN2 = 0V, 1.5A Only) VFB1 = 0.75V, VSYNC/MODE = VIN, VRUN1 = VIN 260 400 μA Half Active Mode (VRUN1 = 0V, 1A Only) VFB2 = 0.75V, VSYNC/MODE = VIN, VRUN2 = VIN 260 400 μA Both Channels in Sleep Mode VFB1 = VFB2 = 1V, VSYNC/MODE = VIN, VRUN1 = 125 250 μA VRUN2 = VIN Shutdown VRUN1 = VRUN2 = 0V 0.01 1 μA fOSC Oscillator Frequency VFREQ = VIN 1.2 1.5 1.8 MHz VFREQ: RT = 143k 0.85 1 1.25 MHz VFREQ: Resistor (Note 6) 4 MHz ILIM1 Peak Switch Current Limit on SW1 (1.5A) 2.1 2.5 A ILIM2 Peak Switch Current Limit on SW2 (1A) 1.4 1.7 A RDS(ON)1 SW1 Top Switch On-Resistance (1.5A) VIN1 = 3.6V (Note 5) 0.088 Ω SW1 Bottom Switch On-Resistance VIN1 = 3.6V (Note 5) 0.084 Ω RDS(ON)2 SW2 Top Switch On-Resistance (1A) VIN2 = 3.6V (Note 5) 0.16 Ω SW2 Bottom Switch On-Resistance VIN2 = 3.6V (Note 5) 0.15 Ω ISW1(LKG) Switch Leakage Current SW1 (1.5A) VIN1 = 6V, VITH1 = 0V, VRUN1 = 0V 0.01 1 μA ISW2(LKG) Switch Leakage Current SW2 (1A) VIN2 = 6V, VITH2 = 0V, VRUN2 = 0V 0.01 1 μA VUVLO Undervoltage Lockout Threshold VIN1, VIN2 Ramping Down 1.9 2.07 2.2 V VIN1, VIN2 Ramping Up 1.95 2.12 2.25 V TPGOOD Threshold for Power Good. Percentage VFB1 or VFB2 Ramping Up –6 % Deviation from VFB Steady State VFB1 or VFB2 Ramping Down –6 % (Typically 0.8V) RPGOOD Power Good Pull-Down On-Resistance 120 300 Ω VRUN1, VRUN2 RUN1, RUN2 Threshold 0.3 0.85 1.5 V VPHASE PHASE Threshold High-CMOS Levels VIN –0.5 V PHASE Threshold Low-CMOS Levels 0.5 V IRUN1, IRUN2, IPHASE, RUN1, RUN2, PHASE and SYNC/MODE VIN = 6V, Pin Under Test = 3V ±0.01 ±1 μA ISYNC/MODE Leakage Current VTLSYNC/MODE SYNC/MODE Threshold Voltage Low 0.5 V VTHSYNC/MODE SYNC/MODE Threshold Voltage High VIN –0.5 V VTHFREQ FREQ Threshold Voltage High VIN –0.5 V 3417a2fa 3