Datasheet LTC3609 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 32V, 6A Monolithic Synchronous Step-Down DC/DC Converter |
| Pages / Page | 26 / 3 — The. denotes the specifications which apply over the full operating |
| File Format / Size | PDF / 429 Kb |
| Document Language | English |
The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
Text Version of Document
LTC3609 e
lecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
SVIN Operating Input Voltage Range 4 32 V IQ Input DC Supply Current Normal 900 2000 µA Shutdown Supply Current 15 30 µA VFB Feedback Reference Voltage ITH = 1.2V (Note 3) –40°C to 85°C 0.594 0.600 0.606 V –40°C to 125°C l 0.590 0.600 0.610 V ∆VFB(LINEREG) Feedback Voltage Line Regulation VIN = 4V to 30V, ITH = 1.2V (Note 3) 0.002 %/V ∆VFB(LOADREG) Feedback Voltage Load Regulation ITH = 0.5V to 1.9V (Note 3) –0.05 –0.3 % IFB Feedback Input Current VFB = 0.6V –5 ±50 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V (Note 3) l 1.4 1.7 2 mS VFCB Forced Continuous Threshold l 0.54 0.6 0.66 V IFCB Forced Continuous Pin Current VFCB = 0.6V –1 –2 µA tON On-Time ION = 60µA, VON = 1.5V 220 280 340 ns ION = 60µA, VON = 0V 110 ns tON(MIN) Minimum On-Time ION = 180µA, VON = 0V 60 100 ns tOFF(MIN) Minimum Off-Time ION = 30µA, VON = 1.5V 320 500 ns IVALLEY(MAX) Maximum Valley Current VRNG = 0V, VFB = 0.56V, FCB = 0V l 4 9 A VRNG = 1.2V, VFB = 0.56V, FCB = 0V l 6 14 A IVALLEY(MIN) Maximum Reverse Valley Current VRNG = 0V, VFB = 0.64V, FCB = 0V 4 A VRNG = 1.2V, VFB = 0.64V, FCB = 0V 7 A ∆VFB(OV) Output Overvoltage Fault Threshold 7 10 13 % VRUN/SS(ON) RUN Pin Start Threshold l 0.8 1.5 2 V VRUN/SS(LE) RUN Pin Latchoff Enable Threshold RUN/SS Pin Rising 4 4.5 V VRUN/SS(LT) RUN Pin Latchoff Threshold RUN/SS Pin Falling 3.5 4.2 V IRUN/SS(C) Soft-Start Charge Current VRUN/SS = 0V –0.5 –1.2 –3 µA IRUN/SS(D) Soft-Start Discharge Current VRUN/SS = 4.5V, VFB = 0V 0.8 1.8 3 µA VIN(UVLO) Undervoltage Lockout VIN Falling l 3.4 3.9 V VIN(UVLOR) Undervoltage Lockout Release VIN Rising l 3.5 4 V RDS(ON) Top Switch On-Resistance 18 27 mΩ Bottom Switch On-Resistance 13 22 mΩ 3609fb Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
lecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
SVIN Operating Input Voltage Range 4 32 V IQ Input DC Supply Current Normal 900 2000 µA Shutdown Supply Current 15 30 µA VFB Feedback Reference Voltage ITH = 1.2V (Note 3) –40°C to 85°C 0.594 0.600 0.606 V –40°C to 125°C l 0.590 0.600 0.610 V ∆VFB(LINEREG) Feedback Voltage Line Regulation VIN = 4V to 30V, ITH = 1.2V (Note 3) 0.002 %/V ∆VFB(LOADREG) Feedback Voltage Load Regulation ITH = 0.5V to 1.9V (Note 3) –0.05 –0.3 % IFB Feedback Input Current VFB = 0.6V –5 ±50 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V (Note 3) l 1.4 1.7 2 mS VFCB Forced Continuous Threshold l 0.54 0.6 0.66 V IFCB Forced Continuous Pin Current VFCB = 0.6V –1 –2 µA tON On-Time ION = 60µA, VON = 1.5V 220 280 340 ns ION = 60µA, VON = 0V 110 ns tON(MIN) Minimum On-Time ION = 180µA, VON = 0V 60 100 ns tOFF(MIN) Minimum Off-Time ION = 30µA, VON = 1.5V 320 500 ns IVALLEY(MAX) Maximum Valley Current VRNG = 0V, VFB = 0.56V, FCB = 0V l 4 9 A VRNG = 1.2V, VFB = 0.56V, FCB = 0V l 6 14 A IVALLEY(MIN) Maximum Reverse Valley Current VRNG = 0V, VFB = 0.64V, FCB = 0V 4 A VRNG = 1.2V, VFB = 0.64V, FCB = 0V 7 A ∆VFB(OV) Output Overvoltage Fault Threshold 7 10 13 % VRUN/SS(ON) RUN Pin Start Threshold l 0.8 1.5 2 V VRUN/SS(LE) RUN Pin Latchoff Enable Threshold RUN/SS Pin Rising 4 4.5 V VRUN/SS(LT) RUN Pin Latchoff Threshold RUN/SS Pin Falling 3.5 4.2 V IRUN/SS(C) Soft-Start Charge Current VRUN/SS = 0V –0.5 –1.2 –3 µA IRUN/SS(D) Soft-Start Discharge Current VRUN/SS = 4.5V, VFB = 0V 0.8 1.8 3 µA VIN(UVLO) Undervoltage Lockout VIN Falling l 3.4 3.9 V VIN(UVLOR) Undervoltage Lockout Release VIN Rising l 3.5 4 V RDS(ON) Top Switch On-Resistance 18 27 mΩ Bottom Switch On-Resistance 13 22 mΩ 3609fb Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
