Datasheet LTC3608 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 18V, 8A Monolithic Synchronous Step-Down DC/DC Converter |
| Pages / Page | 26 / 7 — Input and Shutdown Currents. vs Input Voltage. INTVCC Load Regulation. … |
| File Format / Size | PDF / 480 Kb |
| Document Language | English |
Input and Shutdown Currents. vs Input Voltage. INTVCC Load Regulation. IEXTVCC vs Frequency. EXTVCC Switch Resistance
Model Line for this Datasheet
Text Version of Document
LTC3608 typical perForMance characteristics
Input and Shutdown Currents vs Input Voltage INTVCC Load Regulation IEXTVCC vs Frequency
1400 40 0.30 20 VIN = 20V 18 1200 EXTVCC OPEN 35 SHUTDOWN CURRENT (µA) 0.20 16 30 1000 0.10 14 25 800 12 (%) 0 (mA) SHUTDOWN 20 CC 10 600 INTV –0.10 15 Δ I EXTVCC 8 INPUT CURRENT (µA) 400 6 10 –0.20 EXTVCC = 5V 4 200 5 –0.30 2 0 0 –0.40 0 0 5 10 15 20 0 10 20 30 40 50 400 500 600 700 800 900 1000 INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) FREQUENCY (kHz) 3608 G21 3608 G22 3608 G23
EXTVCC Switch Resistance RUN/SS Pin Current vs Temperature FCB Pin Current vs Temperature vs Temperature
10 0 3 8 –0.25 2 –0.50 PULL-DOWN CURRENT 6 1 –0.75 4 0 SWITCH RESISTANCE (Ω) –1.00 CC FCB PIN CURRENT (µA) 2 RUN/SS PIN CURRENT (µA) –1 EXTV –1.25 PULL-UP CURRENT 0 –1.50 –2 –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) 3608 G24 3608 G25 3608 G26
RUN/SS Pin Current Undervoltage Lockout Threshold vs Temperature vs Temperature
5.0 4.0 4.5 3.5 LATCHOFF ENABLE 4.0 3.0 LATCHOFF THRESHOLD 2.5 RUN/SS PIN CURRENT (µA) 3.5 UNDERVOLTAGE LOCKOUT THRESHOLD (V) 3.0 2.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3608 G27 3608 G28 3608fc 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
Input and Shutdown Currents vs Input Voltage INTVCC Load Regulation IEXTVCC vs Frequency
1400 40 0.30 20 VIN = 20V 18 1200 EXTVCC OPEN 35 SHUTDOWN CURRENT (µA) 0.20 16 30 1000 0.10 14 25 800 12 (%) 0 (mA) SHUTDOWN 20 CC 10 600 INTV –0.10 15 Δ I EXTVCC 8 INPUT CURRENT (µA) 400 6 10 –0.20 EXTVCC = 5V 4 200 5 –0.30 2 0 0 –0.40 0 0 5 10 15 20 0 10 20 30 40 50 400 500 600 700 800 900 1000 INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) FREQUENCY (kHz) 3608 G21 3608 G22 3608 G23
EXTVCC Switch Resistance RUN/SS Pin Current vs Temperature FCB Pin Current vs Temperature vs Temperature
10 0 3 8 –0.25 2 –0.50 PULL-DOWN CURRENT 6 1 –0.75 4 0 SWITCH RESISTANCE (Ω) –1.00 CC FCB PIN CURRENT (µA) 2 RUN/SS PIN CURRENT (µA) –1 EXTV –1.25 PULL-UP CURRENT 0 –1.50 –2 –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) 3608 G24 3608 G25 3608 G26
RUN/SS Pin Current Undervoltage Lockout Threshold vs Temperature vs Temperature
5.0 4.0 4.5 3.5 LATCHOFF ENABLE 4.0 3.0 LATCHOFF THRESHOLD 2.5 RUN/SS PIN CURRENT (µA) 3.5 UNDERVOLTAGE LOCKOUT THRESHOLD (V) 3.0 2.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3608 G27 3608 G28 3608fc 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
