Datasheet LTC3713 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Low Input Voltage, High Power, No RSENSE Synchronous Buck DC/DC Controller |
| 页数 / 页 | 24 / 3 — ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over … |
| 文件格式/大小 | PDF / 291 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over the full operating
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LTC3713
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN1 = 15V, VIN2 = 1.5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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 UVLO VIN1 Undervoltage Lockout VIN1 Falling ● 3.4 3.9 V UVLOR VIN1 Undervoltage Lockout Release VIN1 Rising ● 3.5 4 V TG RUP TG Driver Pull-Up On Resistance TG High 2 3 Ω TG RDOWN TG Driver Pull-Down On Resistance TG Low 2 3 Ω BG RUP BG Driver Pull-Up On Resistance BG High 3 4 Ω BG RDOWN BG Driver Pull-Down On Resistance BG Low 1 2 Ω TG tr TG Rise Time CLOAD = 3300pF 20 ns TG tf TG Fall Time CLOAD = 3300pF 20 ns BG tr BG Rise Time CLOAD = 3300pF 20 ns BG tf BG Fall Time CLOAD = 3300pF 20 ns
Internal VCC Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 30V ● 4.7 5 5.3 V ∆VLDO(LOADREG) Internal VCC Load Regulation ICC = 0mA to 20mA –0.1 ±2 %
PGOOD Output
∆VFB1H PGOOD Upper Threshold VFB1 Rising 5.5 7.5 9.5 % ∆VFB1L PGOOD Lower Threshold VFB1 Falling – 5.5 – 7.5 – 9.5 % ∆VFB(HYS) PGOOD Hysteresis VFB1 Returning 1 2 % VPGL PGOOD Low Voltage IPGOOD = 5mA 0.15 0.4 V
Boost Regulator
VIN2(MIN) Minimum Operating Voltage 0.9 1.5 V VIN2(MAX) Maximum Operating Voltage 10 V IQ(VIN2) Input DC Supply Current (VIN2) Normal 3 4.5 mA Shutdown 0.01 1 µA VFB2 VFB2 Feedback Voltage 0°C to 70°C 1.205 1.23 1.255 V –40°C to 85°C ● 1.200 1.260 V IVFB2 VFB2 Pin Bias Current ● 27 80 nA ∆VFB2(LINEREG) BOOST Reference Line Regulation 1.5V ≤ VIN ≤ 10V 0.02 0.2 %/V fBOOST BOOST Switching Frequency 0°C to 70°C 1.0 1.4 1.8 MHz –40°C to 85°C ● 0.9 1.9 MHz DCBOOST(MAX) BOOST Maximum Duty Cycle 82 86 % ILIM(BOOST) BOOST Switch Current Limit (Note 5) 500 800 mA VCESAT(BOOST) BOOST Switch VCESAT ISW = 300mA 300 350 mV ISWLKG(BOOST) BOOST Switch Leakage Current VSW = 5V 0.01 1 µA VSHDN(HIGH) SHDN Input Voltage High 1 V VSHDN(LOW) SHDN Input Voltage Low 0.3 V ISHDN SHDN Pin Bias Current VSHDN = 3V 25 50 µA VSHDN = 0V 0.01 0.1 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life achieve a specified error amplifier output voltage (ITH). of a device may be impaired.
Note 4:
The LTC3713E is guaranteed to meet performance specifications
Note 2:
TJ is calculated from the ambient temperature TA and power from 0°C to 70°C. Specifications over the –40°C to 85°C operating dissipation PD as follows: temperature range are assured by design, characterization and correlation LTC3713EG: T with statistical process controls. J = TA + (PD • 130°C/W)
Note 3:
The LTC3713 is tested in a feedback loop that adjusts V
Note 5:
Current limit guaranteed by design and/or correlation to static test. FB to 3713fa 3
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN1 = 15V, VIN2 = 1.5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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 UVLO VIN1 Undervoltage Lockout VIN1 Falling ● 3.4 3.9 V UVLOR VIN1 Undervoltage Lockout Release VIN1 Rising ● 3.5 4 V TG RUP TG Driver Pull-Up On Resistance TG High 2 3 Ω TG RDOWN TG Driver Pull-Down On Resistance TG Low 2 3 Ω BG RUP BG Driver Pull-Up On Resistance BG High 3 4 Ω BG RDOWN BG Driver Pull-Down On Resistance BG Low 1 2 Ω TG tr TG Rise Time CLOAD = 3300pF 20 ns TG tf TG Fall Time CLOAD = 3300pF 20 ns BG tr BG Rise Time CLOAD = 3300pF 20 ns BG tf BG Fall Time CLOAD = 3300pF 20 ns
Internal VCC Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 30V ● 4.7 5 5.3 V ∆VLDO(LOADREG) Internal VCC Load Regulation ICC = 0mA to 20mA –0.1 ±2 %
PGOOD Output
∆VFB1H PGOOD Upper Threshold VFB1 Rising 5.5 7.5 9.5 % ∆VFB1L PGOOD Lower Threshold VFB1 Falling – 5.5 – 7.5 – 9.5 % ∆VFB(HYS) PGOOD Hysteresis VFB1 Returning 1 2 % VPGL PGOOD Low Voltage IPGOOD = 5mA 0.15 0.4 V
Boost Regulator
VIN2(MIN) Minimum Operating Voltage 0.9 1.5 V VIN2(MAX) Maximum Operating Voltage 10 V IQ(VIN2) Input DC Supply Current (VIN2) Normal 3 4.5 mA Shutdown 0.01 1 µA VFB2 VFB2 Feedback Voltage 0°C to 70°C 1.205 1.23 1.255 V –40°C to 85°C ● 1.200 1.260 V IVFB2 VFB2 Pin Bias Current ● 27 80 nA ∆VFB2(LINEREG) BOOST Reference Line Regulation 1.5V ≤ VIN ≤ 10V 0.02 0.2 %/V fBOOST BOOST Switching Frequency 0°C to 70°C 1.0 1.4 1.8 MHz –40°C to 85°C ● 0.9 1.9 MHz DCBOOST(MAX) BOOST Maximum Duty Cycle 82 86 % ILIM(BOOST) BOOST Switch Current Limit (Note 5) 500 800 mA VCESAT(BOOST) BOOST Switch VCESAT ISW = 300mA 300 350 mV ISWLKG(BOOST) BOOST Switch Leakage Current VSW = 5V 0.01 1 µA VSHDN(HIGH) SHDN Input Voltage High 1 V VSHDN(LOW) SHDN Input Voltage Low 0.3 V ISHDN SHDN Pin Bias Current VSHDN = 3V 25 50 µA VSHDN = 0V 0.01 0.1 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life achieve a specified error amplifier output voltage (ITH). of a device may be impaired.
Note 4:
The LTC3713E is guaranteed to meet performance specifications
Note 2:
TJ is calculated from the ambient temperature TA and power from 0°C to 70°C. Specifications over the –40°C to 85°C operating dissipation PD as follows: temperature range are assured by design, characterization and correlation LTC3713EG: T with statistical process controls. J = TA + (PD • 130°C/W)
Note 3:
The LTC3713 is tested in a feedback loop that adjusts V
Note 5:
Current limit guaranteed by design and/or correlation to static test. FB to 3713fa 3