Datasheet LTC3404 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 16 / 3 — ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over … |
| 文件格式/大小 | PDF / 215 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over –55. C to 125
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LTC3404
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over –55
°
C to 125
°
C, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) 4 30 nA VFB Regulated Output Voltage (Note 4) 0°C ≤ TA ≤ 125°C 0.784 0.8 0.816 V (Note 4) – 55°C ≤ TA ≤ 125°C 0.74 0.8 0.84 V ΔVOVL Output Overvoltage Lockout ΔVOVL = VOVL – VFB 20 50 110 mV ΔVFB Reference Voltage Line Regulation VIN = 2.65V to 6V (Note 4) 0.05 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V 0.1 1 % Measured in Servo Loop; VITH = 1.5V to 1.2V – 0.1 – 1 % VIN Input Voltage Range 2.65 6 V IQ Input DC Bias Current (Note 5) Pulse Skipping Mode 2.65V < VIN < 6V, VSYNC/MODE = 0V, IOUT = 0A 400 700 μA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 μA Shutdown VRUN = 0V, VIN = 6V 0 1 μA fOSC Oscillator Frequency VFB = 0.8V 1.25 1.4 1.65 MHz VFB = 0V 200 kHz fSYNC SYNC Capture Range 1.0 1.7 MHz IPLL LPF Phase Detector Output Current Sinking Capability fPLLIN < fOSC 6 20 40 μA Sourcing Capability fPLLIN > fOSC –6 –20 –40 μA RPFET RDS(ON) of P-Channel MOSFET ISW = 100mA 0.7 Ω RNFET RDS(ON) of N-Channel MOSFET ISW = –100mA 0.8 Ω IPK Peak Inductor Current VIN = 3.3V, VFB = 0.7V, Duty Cycle < 35%, 0.4 1.0 1.1 A TA = 125°C VIN = 4V, VFB = 0.7V, Duty Cycle < 35%, 0.8 1.2 A TA = 125°C ILSW SW Leakage VRUN = 0V, VSW = 0V or 6V, VIN = 6V ±3 μA VSYNC/MODE SYNC/MODE Threshold VSYNC/MODE Rising 0.3 1.5 V ISYNC/MODE SYNC/MODE Leakage Current ±1 μA VRUN RUN Threshold VRUN Rising 0.3 1.5 V IRUN RUN Input Current ±1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
TJ is calculated from the ambient temperature TA and power may cause permanent damage to the device. Exposure to any Absolute dissipation PD according to the following formulas: Maximum Rating condition for extended periods may affect device TJ = TA + (PD)(150°C/W) reliability and lifetime.
Note 4:
The LTC3404 is tested in a feedback loop which servos VFB to the
Note 2:
The LTC3404E is guaranteed to meet performance specifications balance point for the error amplifier (VITH = 1.2V). from 0°C to 85°C. Specifications over the – 40°C to 85°C operating
Note 5:
Dynamic supply current is higher due to the gate charge being temperature range are assured by design, characterization and correlation delivered at the switching frequency. with statistical process controls. The LTC3404I is guaranteed to meet performance specifications over the –40°C to 85°C operating temperature range. The LTC3404MP is guaranteed to meet performance specifications over the –55°C to 125°C operating temperature range. 3404fb 3
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over –55
°
C to 125
°
C, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) 4 30 nA VFB Regulated Output Voltage (Note 4) 0°C ≤ TA ≤ 125°C 0.784 0.8 0.816 V (Note 4) – 55°C ≤ TA ≤ 125°C 0.74 0.8 0.84 V ΔVOVL Output Overvoltage Lockout ΔVOVL = VOVL – VFB 20 50 110 mV ΔVFB Reference Voltage Line Regulation VIN = 2.65V to 6V (Note 4) 0.05 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V 0.1 1 % Measured in Servo Loop; VITH = 1.5V to 1.2V – 0.1 – 1 % VIN Input Voltage Range 2.65 6 V IQ Input DC Bias Current (Note 5) Pulse Skipping Mode 2.65V < VIN < 6V, VSYNC/MODE = 0V, IOUT = 0A 400 700 μA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 μA Shutdown VRUN = 0V, VIN = 6V 0 1 μA fOSC Oscillator Frequency VFB = 0.8V 1.25 1.4 1.65 MHz VFB = 0V 200 kHz fSYNC SYNC Capture Range 1.0 1.7 MHz IPLL LPF Phase Detector Output Current Sinking Capability fPLLIN < fOSC 6 20 40 μA Sourcing Capability fPLLIN > fOSC –6 –20 –40 μA RPFET RDS(ON) of P-Channel MOSFET ISW = 100mA 0.7 Ω RNFET RDS(ON) of N-Channel MOSFET ISW = –100mA 0.8 Ω IPK Peak Inductor Current VIN = 3.3V, VFB = 0.7V, Duty Cycle < 35%, 0.4 1.0 1.1 A TA = 125°C VIN = 4V, VFB = 0.7V, Duty Cycle < 35%, 0.8 1.2 A TA = 125°C ILSW SW Leakage VRUN = 0V, VSW = 0V or 6V, VIN = 6V ±3 μA VSYNC/MODE SYNC/MODE Threshold VSYNC/MODE Rising 0.3 1.5 V ISYNC/MODE SYNC/MODE Leakage Current ±1 μA VRUN RUN Threshold VRUN Rising 0.3 1.5 V IRUN RUN Input Current ±1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
TJ is calculated from the ambient temperature TA and power may cause permanent damage to the device. Exposure to any Absolute dissipation PD according to the following formulas: Maximum Rating condition for extended periods may affect device TJ = TA + (PD)(150°C/W) reliability and lifetime.
Note 4:
The LTC3404 is tested in a feedback loop which servos VFB to the
Note 2:
The LTC3404E is guaranteed to meet performance specifications balance point for the error amplifier (VITH = 1.2V). from 0°C to 85°C. Specifications over the – 40°C to 85°C operating
Note 5:
Dynamic supply current is higher due to the gate charge being temperature range are assured by design, characterization and correlation delivered at the switching frequency. with statistical process controls. The LTC3404I is guaranteed to meet performance specifications over the –40°C to 85°C operating temperature range. The LTC3404MP is guaranteed to meet performance specifications over the –55°C to 125°C operating temperature range. 3404fb 3