Datasheet LTC3851A (Analog Devices) - 7
| Производитель | Analog Devices |
| Описание | Synchronous Step-Down Switching Regulator Controller |
| Страниц / Страница | 30 / 7 — Typical perForMance characTerisTics. Shutdown (RUN) Threshold. Regulated … |
| Формат / Размер файла | PDF / 445 Кб |
| Язык документа | английский |
Typical perForMance characTerisTics. Shutdown (RUN) Threshold. Regulated Feedback Voltage. Oscillator Frequency. vs Temperature
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LTC3851A
Typical perForMance characTerisTics Shutdown (RUN) Threshold Regulated Feedback Voltage Oscillator Frequency vs Temperature vs Temperature vs Temperature
1.4 806 900 800 R 1.3 804 PLLLPF = 36k RUN RISING THRESHOLD (ON) 700 802 1.2 600 RUN FALLING THRESHOLD (OFF) 800 RPLLLPF = 60k 1.1 500 798 FREQUENCY (kHz) RUN PIN VOLTAGE (V) 400 1.0 796 300 R REGULATED FEEDBACK VOLTAGE (mV) PLLLPF = 160k 0.9 794 200 –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) 3851A G20 3851A G21 3851A G22
Oscillator Frequency Undervoltage Lockout Threshold Shutdown Input DC Supply vs Input Voltage (INTVCC) vs Temperature Current vs Input Voltage
420 5 40 RFREQ = 80k 415 35 4 410 INTVCC RAMPING UP 30 405 25 3 INTVCC RAMPING DOWN 400 20 395 2 15 FREQUENCY (kHz) 390 10 VOLTAGE AT UVLO THRESHOLD (V) 1 385 CC SHUTDOWN SUPPLY CURRENT (µA) 5 INTV 380 0 0 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3851A G23 3851A G24 3851A G25
Shutdown Input DC Supply Input DC Supply Current Maximum Current Sense Current vs Temperature vs Temperature Threshold vs INTVCC Voltage
40 3.0 90 80 ISET = INTVCC 35 2.5 70 30 2.0 (mV) 60 25 ISET = FLOAT SENSE 50 20 1.5 40 I 15 SET = GND 1.0 30 10 MAXIMUM V 20 0.5 5 INPUT DC SUPPLY CURRENT (mA) 10 SHUTDOWN INPUT DC SUPPLY CURRENT (µA) 0 0 0 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 TEMPERATURE (°C) TEMPERATURE (°C) INTVCC VOLTAGE(V) 3851A G26 3851A G27 3851A G28 3851afa 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
