Datasheet LTC3861 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing |
| Pages / Page | 38 / 7 — Typical perFormance characTerisTics. Overcurrent Threshold. Oscillator … |
| File Format / Size | PDF / 996 Kb |
| Document Language | English |
Typical perFormance characTerisTics. Overcurrent Threshold. Oscillator Frequency vs RFREQ. vs Temperature
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LTC3861
Typical perFormance characTerisTics Overcurrent Threshold Oscillator Frequency vs RFREQ vs Temperature ILIM Pin Current vs Temperature
2.5 40 20.6 ILIM = 1.2V 2.3 20.4 2.1 35 1.9 30 20.2 1.7 TAGE (mV) 1.5 20.0 25 1.3 19.8 1.1 20 PIN CURRENT (µA) 0.9 ILIM = 800mV 15 I LIM 19.6 0.7 OSCILLATOR FREQUENCY (MHz) 0.5 CURRENT SENSE VOL 10 19.4 0.3 0.1 5 19.2 0 20 40 60 80 100 120 –50 0 50 100 150 –50 0 50 100 150 R TEMPERATURE (°C) FREQ (kΩ) TEMPERATURE (°C) 3861 G19 3861 G20 3861 G21
600kHz Preset Frequency 1MHz Preset Frequency FREQ Pin Current vs Temperature vs Temperature vs Temperature
20.6 600 1000 20.4 595 990 20.2 590 980 20.0 585 19.8 970 580 19.6 960 575 FREQ PIN CURRENT (µA) 19.4 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 950 19.2 570 19.0 565 940 –50 0 50 100 150 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3861 G22 3861 G23 3861 G24
Shutdown Quiescent Current Shutdown Quiescent Current Quiescent Current vs Temperature vs Temperature vs Supply Voltage
28 34 40 VIN = 6V VIN = 6V VCC = 5V VCC = 5V 35 RUN1 = RUN2 = 5V 33 26 30 32 24 25 31 20 22 15 30 QUIESCENT CURRENT (mA) 20 SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) 10 29 5 18 28 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3861 G25 3861 G26 3861 G27 3861fb For more information www.linear.com/LTC3861 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Related Parts
Typical perFormance characTerisTics Overcurrent Threshold Oscillator Frequency vs RFREQ vs Temperature ILIM Pin Current vs Temperature
2.5 40 20.6 ILIM = 1.2V 2.3 20.4 2.1 35 1.9 30 20.2 1.7 TAGE (mV) 1.5 20.0 25 1.3 19.8 1.1 20 PIN CURRENT (µA) 0.9 ILIM = 800mV 15 I LIM 19.6 0.7 OSCILLATOR FREQUENCY (MHz) 0.5 CURRENT SENSE VOL 10 19.4 0.3 0.1 5 19.2 0 20 40 60 80 100 120 –50 0 50 100 150 –50 0 50 100 150 R TEMPERATURE (°C) FREQ (kΩ) TEMPERATURE (°C) 3861 G19 3861 G20 3861 G21
600kHz Preset Frequency 1MHz Preset Frequency FREQ Pin Current vs Temperature vs Temperature vs Temperature
20.6 600 1000 20.4 595 990 20.2 590 980 20.0 585 19.8 970 580 19.6 960 575 FREQ PIN CURRENT (µA) 19.4 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 950 19.2 570 19.0 565 940 –50 0 50 100 150 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3861 G22 3861 G23 3861 G24
Shutdown Quiescent Current Shutdown Quiescent Current Quiescent Current vs Temperature vs Temperature vs Supply Voltage
28 34 40 VIN = 6V VIN = 6V VCC = 5V VCC = 5V 35 RUN1 = RUN2 = 5V 33 26 30 32 24 25 31 20 22 15 30 QUIESCENT CURRENT (mA) 20 SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) 10 29 5 18 28 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3861 G25 3861 G26 3861 G27 3861fb For more information www.linear.com/LTC3861 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Related Parts
