Datasheet LTC3851A-1 (Analog Devices) - 7

Производитель	Analog Devices
Описание	Synchronous Step-Down Switching Regulator Controller
Страниц / Страница	30 / 7 — Typical perForMance characTerisTics. Maximum Current Sense Threshold. …
Формат / Размер файла	PDF / 442 Кб
Язык документа	английский

Typical perForMance characTerisTics. Maximum Current Sense Threshold. Maximum Peak Current Sense. INTVCC Line Regulation

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LTC3851A-1

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LTC3851A-1
Typical perForMance characTerisTics Maximum Current Sense Threshold Maximum Peak Current Sense INTVCC Line Regulation vs Common Mode Voltage Threshold vs ITH Voltage
5.3 90 90 DUTY CYCLE RANGE: 0% TO 100% 5.1 ILOAD = 0mA 80 80 70 4.9 ILOAD = 25mA 70 60 4.7 60 50 TAGE (V) 4.5 50 (mV) 40 VOL 4.3 40 30 V CC THRESHOLD (mV) V SENSE 4.1 30 20 INT 10 3.9 V SENSE 20 0 3.7 10 –10 3.5 0 –20 4 8 12 16 20 24 28 32 36 40 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 INPUT VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) VITH (V) 3851A1 G13 3851A1 G14 3851A1 G15
Maximum Current Sense Burst Mode Peak Current Sense Maximum Current Sense Threshold vs Feedback Voltage Threshold vs ITH Voltage Threshold vs Duty Cycle (Current Foldback)
60 90 90 MAXIMUIM 80 80 50 70 70 40 60 (mV) 60 (mV) 50 50 30 SENSE 40 40 V SENSE 20 30 30 MINIMUIM MAXIMUM V 20 20 10 BURST COMPARATOR FALLING THESHOLD: CURRENT SENSE THRESHOLD (mV) 10 10 V 0 ITH = 0.4V 0 0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 0 20 40 60 80 100 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 VITH (V) DUTY CYCLE (%) FEEDBACK VOLTAGE (V) 3851A1 G16 3851A1 G17 3851A1 G18
TK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.5 1.4 806 1.4 804 1.3 1.3 RUN RISING THRESHOLD (ON) 1.2 802 1.1 1.2 1.0 RUN FALLING THRESHOLD (OFF) 800 0.9 1.1 798 TK/SS CURRENT (µA) 0.8 RUN PIN VOLTAGE (V) 0.7 1.0 796 0.6 REGULATED FEEDBACK VOLTAGE (mV) 0.5 0.9 794 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3851A1 G19 3851A1 G20 3851A1 G21 3851a1fa 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 Revision History Typical Application Related Parts

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