Datasheet LTC3855 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense |
| Pages / Page | 44 / 8 — Shutdown (RUN) Threshold. Regulated Feedback Voltage. Oscillator … |
| File Format / Size | PDF / 2.2 Mb |
| Document Language | English |
Shutdown (RUN) Threshold. Regulated Feedback Voltage. Oscillator Frequency. vs Temperature. Undervoltage Lockout Threshold
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Text Version of Document
LTC3855 Typical perForMance characTerisTics
Shutdown (RUN) Threshold Regulated Feedback Voltage Oscillator Frequency vs Temperature vs Temperature vs Temperature
1.26 612 900 1.24 610 800 608 VFREQ = INTVCC 1.22 700 ON 606 600 1.20 604 500 1.18 602 VFREQ = 1.2V 400 1.16 600 FREQUENCY (kHz) 300 598 RUN PIN THRESHOLD (V) 1.14 200 VFREQ = GND OFF 596 1.12 REGULATED FEEDBACK VOLTAGE (mV) 594 100 1.10 592 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3855 G15 3855 G16 3855 G17
Undervoltage Lockout Threshold Oscillator Frequency Shutdown Current (INTVCC) vs Temperature vs Input Voltage vs Input Voltage
4.1 520 60 3.9 RISING 50 3.7 510 40 3.5 3.3 FALLING 500 30 3.1 FREQUENCY (kHz) 20 UVLO THRESHOLD (V) 2.9 490 10 2.7 SHUTDOWN INPUT CURRENT (µA) 2.5 480 0 –40 –20 0 20 40 60 80 100 5 10 15 20 25 30 35 40 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3855 G18 3855 G19 3855 G20
Shutdown Current Quiescent Current vs Temperature vs Input Voltage without EXTVCC
60 4.5 4.3 50 4.1 3.9 40 3.7 30 3.5 3.3 20 3.1 SUPPLY CURRENT (mA) SHUTDOWN CURRENT (µA) 2.9 10 2.7 0 2.5 –50 –25 0 25 50 75 100 125 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) 3855 G21 3855 G22 3855f Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Related Parts
Shutdown (RUN) Threshold Regulated Feedback Voltage Oscillator Frequency vs Temperature vs Temperature vs Temperature
1.26 612 900 1.24 610 800 608 VFREQ = INTVCC 1.22 700 ON 606 600 1.20 604 500 1.18 602 VFREQ = 1.2V 400 1.16 600 FREQUENCY (kHz) 300 598 RUN PIN THRESHOLD (V) 1.14 200 VFREQ = GND OFF 596 1.12 REGULATED FEEDBACK VOLTAGE (mV) 594 100 1.10 592 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3855 G15 3855 G16 3855 G17
Undervoltage Lockout Threshold Oscillator Frequency Shutdown Current (INTVCC) vs Temperature vs Input Voltage vs Input Voltage
4.1 520 60 3.9 RISING 50 3.7 510 40 3.5 3.3 FALLING 500 30 3.1 FREQUENCY (kHz) 20 UVLO THRESHOLD (V) 2.9 490 10 2.7 SHUTDOWN INPUT CURRENT (µA) 2.5 480 0 –40 –20 0 20 40 60 80 100 5 10 15 20 25 30 35 40 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3855 G18 3855 G19 3855 G20
Shutdown Current Quiescent Current vs Temperature vs Input Voltage without EXTVCC
60 4.5 4.3 50 4.1 3.9 40 3.7 30 3.5 3.3 20 3.1 SUPPLY CURRENT (mA) SHUTDOWN CURRENT (µA) 2.9 10 2.7 0 2.5 –50 –25 0 25 50 75 100 125 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) 3855 G21 3855 G22 3855f Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Related Parts
