Datasheet LTC3418 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 8A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 22 / 3 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 494 Kb |
| 文件语言 | 英语 |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
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LTC3418
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range 2.25 5.5 V VFB Regulated Feedback Voltage 0°C ≤ TA ≤ 85°C 0.792 0.800 0.808 V (Note 3) l 0.784 0.800 0.816 V IFB Feedback Input Current 100 200 nA ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 3) 0.04 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop, VITH = 0.36V l 0.02 0.2 % Measured in Servo Loop, VITH = 0.84V l –0.02 –0.2 % VTRACK Tracking Voltage Offset VTRACK = 0.4V 15 mV Tracking Voltage Range 0 0.8 V ITRACK TRACK Input Current 100 200 nA ∆VPGOOD Power Good Range ±7.5 ±9 % RPGOOD Power Good Resistance 100 150 Ω IQ Input DC Bias Current (Note 4) Active Current VFB = 0.7V, VITH = 1V 380 450 µA Shutdown VRUN = 0V 0.03 1.5 µA fOSC Switching Frequency ROSC = 69.8kΩ 0.88 1 1.12 MHz Switching Frequency Range (Note 6) 0.3 4 MHz fSYNC SYNC Capture Range (Note 6) 0.3 4 MHz RPFET RDS(ON) of P-Channel FET ISW = 600mA 35 50 mΩ RNFET RDS(ON) of N-Channel FET ISW = –600mA 25 35 mΩ ILIMIT Peak Current Limit 12 17 A VUVLO Undervoltage Lockout Threshold 1.75 2 2.25 V VREF Reference Output 1.219 1.250 1.281 V ILSW SW Leakage Current VRUN = 0V, VIN = 5.5V 0.1 1 µA VRUN RUN Threshold 0.5 0.65 0.8 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3418 is tested in a feedback loop that adjusts VFB to may cause permanent damage to the device. Exposure to any Absolute achieve a specified error amplifier output voltage (ITH). Maximum Rating condition for extended periods may affect device
Note 4:
Dynamic supply current is higher due to the internal gate charge reliability and lifetime. being delivered at the switching frequency.
Note 2:
The LTC3418 is guaranteed to meet performance specifications
Note 5:
TJ is calculated from the ambient temperature TA and power from 0°C to 85°C. Specifications over the –40°C to 85°C operating dissipation PD as follows: temperature range are assured by design, characterization and LTC3418: T correlation with statistical process controls. J = TA + (PD)(34°C/W)
Note 6:
This parameter is guaranteed by design and characterization. 3418fc For more information www.linear.com/LTC3418 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range 2.25 5.5 V VFB Regulated Feedback Voltage 0°C ≤ TA ≤ 85°C 0.792 0.800 0.808 V (Note 3) l 0.784 0.800 0.816 V IFB Feedback Input Current 100 200 nA ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 3) 0.04 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop, VITH = 0.36V l 0.02 0.2 % Measured in Servo Loop, VITH = 0.84V l –0.02 –0.2 % VTRACK Tracking Voltage Offset VTRACK = 0.4V 15 mV Tracking Voltage Range 0 0.8 V ITRACK TRACK Input Current 100 200 nA ∆VPGOOD Power Good Range ±7.5 ±9 % RPGOOD Power Good Resistance 100 150 Ω IQ Input DC Bias Current (Note 4) Active Current VFB = 0.7V, VITH = 1V 380 450 µA Shutdown VRUN = 0V 0.03 1.5 µA fOSC Switching Frequency ROSC = 69.8kΩ 0.88 1 1.12 MHz Switching Frequency Range (Note 6) 0.3 4 MHz fSYNC SYNC Capture Range (Note 6) 0.3 4 MHz RPFET RDS(ON) of P-Channel FET ISW = 600mA 35 50 mΩ RNFET RDS(ON) of N-Channel FET ISW = –600mA 25 35 mΩ ILIMIT Peak Current Limit 12 17 A VUVLO Undervoltage Lockout Threshold 1.75 2 2.25 V VREF Reference Output 1.219 1.250 1.281 V ILSW SW Leakage Current VRUN = 0V, VIN = 5.5V 0.1 1 µA VRUN RUN Threshold 0.5 0.65 0.8 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3418 is tested in a feedback loop that adjusts VFB to may cause permanent damage to the device. Exposure to any Absolute achieve a specified error amplifier output voltage (ITH). Maximum Rating condition for extended periods may affect device
Note 4:
Dynamic supply current is higher due to the internal gate charge reliability and lifetime. being delivered at the switching frequency.
Note 2:
The LTC3418 is guaranteed to meet performance specifications
Note 5:
TJ is calculated from the ambient temperature TA and power from 0°C to 85°C. Specifications over the –40°C to 85°C operating dissipation PD as follows: temperature range are assured by design, characterization and LTC3418: T correlation with statistical process controls. J = TA + (PD)(34°C/W)
Note 6:
This parameter is guaranteed by design and characterization. 3418fc For more information www.linear.com/LTC3418 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts