Datasheet LTC3827-1 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Low IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| Pages / Page | 32 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense Voltage. Sense … |
| File Format / Size | PDF / 458 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense Voltage. Sense Pins Total Input. Maximum Current Sense
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Text Version of Document
LTC3827-1
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold vs Duty Cycle
100 200 120 PULSE SKIPPING FORCED CONTINUOUS 80 100 BURST MODE (RISING) 100 BURST MODE (FALLING) 0 60 –100 80 40 –200 60 20 –300 –400 40 0 INPUT CURRENT (μA) –500 –20 20 CURRENT SENSE THRESHOLD (mV) –600 CURRENT SENSE THRESHOLD (mV) 10% Duty Cycle –40 –700 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 5 6 7 8 9 10 0 10 20 30 40 50 60 70 80 90 100 ITH PIN VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38271 G13 38271 G14 38271 G15
SENSE Pins Total Input Foldback Current Limit Quiescent Current vs Temperature Bias Current vs ITH
120 100 12 TRACK/SS = 1V PLLIN/MODE = 0V VSENSE = 3.3V 95 100 10 90 80 8 85 60 80 6 75 40 4 INPUT CURRENT (μA) QUIESCENT CURRENT (μA) 70 20 2 65 MAXIMUM CURRENT SENSE VOLTAGE (V) 0 60 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –45 –30 –15 0 15 30 45 60 75 90 0 0.2 0.4 0.6 0.8 1 1.2 1.4 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 38271 G16 38271 G17 38271 G18
TRACK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.20 1.00 808 1.15 0.95 806 0.90 1.10 804 0.85 1.05 802 0.80 1.00 0.75 800 0.95 0.70 798 RUN PIN VOLTAGE (V) 0.65 TRACK/SS CURRENT (μA) 0.90 796 0.60 0.85 794 0.55 REGULATED FEEDBACK VOLTAGE (mV) 0.80 0.50 792 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 38271 G19 38271 G20 38271 G21 38271fe 6
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold vs Duty Cycle
100 200 120 PULSE SKIPPING FORCED CONTINUOUS 80 100 BURST MODE (RISING) 100 BURST MODE (FALLING) 0 60 –100 80 40 –200 60 20 –300 –400 40 0 INPUT CURRENT (μA) –500 –20 20 CURRENT SENSE THRESHOLD (mV) –600 CURRENT SENSE THRESHOLD (mV) 10% Duty Cycle –40 –700 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 5 6 7 8 9 10 0 10 20 30 40 50 60 70 80 90 100 ITH PIN VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38271 G13 38271 G14 38271 G15
SENSE Pins Total Input Foldback Current Limit Quiescent Current vs Temperature Bias Current vs ITH
120 100 12 TRACK/SS = 1V PLLIN/MODE = 0V VSENSE = 3.3V 95 100 10 90 80 8 85 60 80 6 75 40 4 INPUT CURRENT (μA) QUIESCENT CURRENT (μA) 70 20 2 65 MAXIMUM CURRENT SENSE VOLTAGE (V) 0 60 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –45 –30 –15 0 15 30 45 60 75 90 0 0.2 0.4 0.6 0.8 1 1.2 1.4 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 38271 G16 38271 G17 38271 G18
TRACK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.20 1.00 808 1.15 0.95 806 0.90 1.10 804 0.85 1.05 802 0.80 1.00 0.75 800 0.95 0.70 798 RUN PIN VOLTAGE (V) 0.65 TRACK/SS CURRENT (μA) 0.90 796 0.60 0.85 794 0.55 REGULATED FEEDBACK VOLTAGE (mV) 0.80 0.50 792 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 38271 G19 38271 G20 38271 G21 38271fe 6
