Datasheet LTC3851A-1 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Synchronous Step-Down Switching Regulator Controller |
| Pages / Page | 30 / 8 — Typical perForMance characTerisTics. Oscillator Frequency. Undervoltage … |
| File Format / Size | PDF / 442 Kb |
| Document Language | English |
Typical perForMance characTerisTics. Oscillator Frequency. Undervoltage Lockout Threshold. vs Temperature. vs Input Voltage
Model Line for this Datasheet
- LTC3851AEMSE-1#PBF LTC3851AEMSE-1#PBF LTC3851AEMSE-1#TRPBF LTC3851AEMSE-1#TRPBF LTC3851AEUD-1#PBF LTC3851AEUD-1#PBF LTC3851AEUD-1#TRPBF LTC3851AEUD-1#TRPBF LTC3851AHMSE-1#PBF LTC3851AHMSE-1#PBF LTC3851AHMSE-1#TRPBF LTC3851AHMSE-1#TRPBF LTC3851AIMSE-1#PBF LTC3851AIMSE-1#PBF LTC3851AIMSE-1#TRPBF LTC3851AIMSE-1#TRPBF LTC3851AIUD-1#PBF LTC3851AIUD-1#PBF LTC3851AIUD-1#TRPBF LTC3851AIUD-1#TRPBF LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#TRPBF LTC3851AMPMSE-1#TRPBF
Text Version of Document
LTC3851A-1
Typical perForMance characTerisTics Oscillator Frequency Oscillator Frequency Undervoltage Lockout Threshold vs Temperature vs Input Voltage (INTVCC) vs Temperature
900 420 5 RFREQ = 80k 800 R 415 PLLLPF = 36k 4 INTVCC RAMPING UP 410 700 405 600 3 INTVCC RAMPING DOWN RPLLLPF = 60k 400 500 2 395 FREQUENCY (kHz) FREQUENCY (kHz) 400 390 VOLTAGE AT UVLO THRESHOLD (V) 1 300 R CC PLLLPF = 160k 385 INTV 200 380 0 –75 –50 –25 0 25 50 75 100 125 150 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3851A1 G22 3851A1 G23 3851A1 G24
Shutdown Input DC Supply Shutdown Input DC Supply Current vs Input Voltage Current vs Temperature
40 40 35 35 30 30 25 25 20 20 15 15 10 10 SHUTDOWN SUPPLY CURRENT (µA) 5 5 0 SHUTDOWN INPUT DC SUPPLY CURRENT (µA) 0 0 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) TEMPERATURE (°C) 3851A1 G25 3851A1 G26
Input DC Supply Current Maximum Current Sense vs Temperature Threshold vs INTVCC Voltage
3.0 90 80 2.5 70 2.0 60 50 1.5 40 1.0 30 20 INPUT DC SUPPLY CURRENT (mA) 0.5 CURRENT SENSE THRESHOLD (mV) 10 0 0 –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) INTVCC VOLTAGE(V) 3851A1 G27 3851A1 G28 3851a1fa 8 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
Typical perForMance characTerisTics Oscillator Frequency Oscillator Frequency Undervoltage Lockout Threshold vs Temperature vs Input Voltage (INTVCC) vs Temperature
900 420 5 RFREQ = 80k 800 R 415 PLLLPF = 36k 4 INTVCC RAMPING UP 410 700 405 600 3 INTVCC RAMPING DOWN RPLLLPF = 60k 400 500 2 395 FREQUENCY (kHz) FREQUENCY (kHz) 400 390 VOLTAGE AT UVLO THRESHOLD (V) 1 300 R CC PLLLPF = 160k 385 INTV 200 380 0 –75 –50 –25 0 25 50 75 100 125 150 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3851A1 G22 3851A1 G23 3851A1 G24
Shutdown Input DC Supply Shutdown Input DC Supply Current vs Input Voltage Current vs Temperature
40 40 35 35 30 30 25 25 20 20 15 15 10 10 SHUTDOWN SUPPLY CURRENT (µA) 5 5 0 SHUTDOWN INPUT DC SUPPLY CURRENT (µA) 0 0 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) TEMPERATURE (°C) 3851A1 G25 3851A1 G26
Input DC Supply Current Maximum Current Sense vs Temperature Threshold vs INTVCC Voltage
3.0 90 80 2.5 70 2.0 60 50 1.5 40 1.0 30 20 INPUT DC SUPPLY CURRENT (mA) 0.5 CURRENT SENSE THRESHOLD (mV) 10 0 0 –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) INTVCC VOLTAGE(V) 3851A1 G27 3851A1 G28 3851a1fa 8 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
