Datasheet LTC3810 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 100V Current Mode Synchronous Switching Regulator Controller |
| 页数 / 页 | 38 / 3 — The. ELECTRICAL CHARACTERISTICS. denotes specifi cations which apply over … |
| 文件格式/大小 | PDF / 491 Kb |
| 文件语言 | 英语 |
The. ELECTRICAL CHARACTERISTICS. denotes specifi cations which apply over the full operating
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LTC3810
The ELECTRICAL CHARACTERISTICS
l
denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C (Note 2), INTVCC = DRVCC = VBOOST = VON = VRNG = SHDN = UVIN = VEXTVCC = VNDRV = 10V, VMODE/SYNC = VSENSE+ = VSENSE– = VBGRTN = VSW = 0V, unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆V Feedback Voltage Line Regulation 7V < INTV FB,LINE CC < 14V (Note 4) l 0.002 0.02 %/V VSENSE(MAX) Maximum Current Sense Threshold VRNG = 2V, VFB = 0.76V 256 320 384 mV VRNG = 0V, VFB = 0.76V 70 95 120 mV VRNG = INTVCC, VFB = 0.76V 170 215 260 mV VSENSE(MIN) Minimum Current Sense Threshold VRNG = 2V, VFB = 0.84V –300 mV VRNG = 0V, VFB = 0.84V –85 mV VRNG = INTVCC, VFB = 0.84V –200 mV IVFB Feedback Current VFB = 0.8V 20 150 nA AVOL(EA) Error Amplifi er DC Open Loop Gain 65 100 dB fU Error Amp Unity-Gain Crossover (Note 6) 25 MHz Frequency VMODE/SYNC MODE/SYNC Threshold VMODE/SYNC Rising 0.75 0.8 0.85 V IMODE/SYNC MODE/SYNC Current MODE/SYNC = 10V 0 1 μA VSHDN Shutdown Threshold 1.2 1.5 2 V ISHDN SHDN Pin Input Current 0 1 μA VVINUV VIN Undervoltage Lockout VIN Rising l 0.86 0.88 0.92 V VIN Falling l 0.78 0.80 0.82 V Hysteresis 0.07 0.10 0.12 V VVCCUV INTVCC Undervoltage Lockout Linear Regulator Mode INTVCC Rising, INDRV = 100μA l 6.05 6.2 6.35 V External Supply Mode INTVCC Rising, NDRV = INTVCC = EXTVCC l 6.05 6.2 6.35 V Trickle-Charge Mode INTVCC Rising, NDRV = INTVCC, EXTVCC = 0 l 11.7 12 12.3 V INTVCC Falling 5.7 V
Oscillator and Phase-Locked Loop
tON On-Time ION = 100μA 1.55 1.85 2.15 μs ION = 300μA 515 605 695 ns tON(MIN) Minimum On-Time ION = 2000μA 100 ns tOFF(MIN) Minimum Off-Time 250 350 ns tON(PLL) tON Modulation Range by PLL Down Modulation ION = 100μA, VPLL/LPF = 0.6V 2.2 3.6 5 μs Up Modulation ION = 100μA, VPLL/LPF = 1.8V 0.6 1.2 1.8 μs IPLL/LPF Phase Detector Output Current Sinking Capability fPLLIN < fSW 15 μA Sourcing Capability fPLLIN > fSW –25 μA
Driver
IBG,PEAK BG Driver Peak Source Current VBG = 0V 1.5 2 A RBG,SINK BG Driver Pull-Down RDS(ON) 1 1.5 Ω ITG,PEAK TG Driver Peak Source Current VTG – VSW = 0V 1.5 2 A RTG,SINK TG Driver Pull-Down RDS(ON) 1 1.5 Ω
PGOOD Output
∆VFBOV PGOOD Upper Threshold VFB Rising 7.5 10 12.5 % PGOOD Lower Threshold VFB Falling –7.5 –10 –12.5 % ∆VFB,HYST PGOOD Hysteresis VFB Returning 1.5 3 % VPGOOD PGOOD Low Voltage IPGOOD = 5mA 0.3 0.6 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 0 2 μA PG Delay PGOOD Delay VFB Falling 120 μs 3810fc 3
The ELECTRICAL CHARACTERISTICS
l
denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C (Note 2), INTVCC = DRVCC = VBOOST = VON = VRNG = SHDN = UVIN = VEXTVCC = VNDRV = 10V, VMODE/SYNC = VSENSE+ = VSENSE– = VBGRTN = VSW = 0V, unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆V Feedback Voltage Line Regulation 7V < INTV FB,LINE CC < 14V (Note 4) l 0.002 0.02 %/V VSENSE(MAX) Maximum Current Sense Threshold VRNG = 2V, VFB = 0.76V 256 320 384 mV VRNG = 0V, VFB = 0.76V 70 95 120 mV VRNG = INTVCC, VFB = 0.76V 170 215 260 mV VSENSE(MIN) Minimum Current Sense Threshold VRNG = 2V, VFB = 0.84V –300 mV VRNG = 0V, VFB = 0.84V –85 mV VRNG = INTVCC, VFB = 0.84V –200 mV IVFB Feedback Current VFB = 0.8V 20 150 nA AVOL(EA) Error Amplifi er DC Open Loop Gain 65 100 dB fU Error Amp Unity-Gain Crossover (Note 6) 25 MHz Frequency VMODE/SYNC MODE/SYNC Threshold VMODE/SYNC Rising 0.75 0.8 0.85 V IMODE/SYNC MODE/SYNC Current MODE/SYNC = 10V 0 1 μA VSHDN Shutdown Threshold 1.2 1.5 2 V ISHDN SHDN Pin Input Current 0 1 μA VVINUV VIN Undervoltage Lockout VIN Rising l 0.86 0.88 0.92 V VIN Falling l 0.78 0.80 0.82 V Hysteresis 0.07 0.10 0.12 V VVCCUV INTVCC Undervoltage Lockout Linear Regulator Mode INTVCC Rising, INDRV = 100μA l 6.05 6.2 6.35 V External Supply Mode INTVCC Rising, NDRV = INTVCC = EXTVCC l 6.05 6.2 6.35 V Trickle-Charge Mode INTVCC Rising, NDRV = INTVCC, EXTVCC = 0 l 11.7 12 12.3 V INTVCC Falling 5.7 V
Oscillator and Phase-Locked Loop
tON On-Time ION = 100μA 1.55 1.85 2.15 μs ION = 300μA 515 605 695 ns tON(MIN) Minimum On-Time ION = 2000μA 100 ns tOFF(MIN) Minimum Off-Time 250 350 ns tON(PLL) tON Modulation Range by PLL Down Modulation ION = 100μA, VPLL/LPF = 0.6V 2.2 3.6 5 μs Up Modulation ION = 100μA, VPLL/LPF = 1.8V 0.6 1.2 1.8 μs IPLL/LPF Phase Detector Output Current Sinking Capability fPLLIN < fSW 15 μA Sourcing Capability fPLLIN > fSW –25 μA
Driver
IBG,PEAK BG Driver Peak Source Current VBG = 0V 1.5 2 A RBG,SINK BG Driver Pull-Down RDS(ON) 1 1.5 Ω ITG,PEAK TG Driver Peak Source Current VTG – VSW = 0V 1.5 2 A RTG,SINK TG Driver Pull-Down RDS(ON) 1 1.5 Ω
PGOOD Output
∆VFBOV PGOOD Upper Threshold VFB Rising 7.5 10 12.5 % PGOOD Lower Threshold VFB Falling –7.5 –10 –12.5 % ∆VFB,HYST PGOOD Hysteresis VFB Returning 1.5 3 % VPGOOD PGOOD Low Voltage IPGOOD = 5mA 0.3 0.6 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 0 2 μA PG Delay PGOOD Delay VFB Falling 120 μs 3810fc 3