Datasheet LTC3642 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | High Efficiency, High Voltage 50mA Synchronous Step-Down Converter |
| Pages / Page | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 1.8 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch On-Resistance. Switch Leakage Current
Model Line for this Datasheet
- LTC3642EDD#PBF LTC3642EDD#TRPBF LTC3642EDD-3.3#PBF LTC3642EDD-3.3#TRPBF LTC3642EDD-5#PBF LTC3642EDD-5#TRPBF LTC3642EMS8E#PBF LTC3642EMS8E#TRPBF LTC3642EMS8E-3.3#PBF LTC3642EMS8E-3.3#TRPBF LTC3642EMS8E-5#PBF LTC3642EMS8E-5#TRPBF LTC3642IDD#PBF LTC3642IDD#TRPBF LTC3642IDD-3.3#PBF LTC3642IDD-3.3#TRPBF LTC3642IDD-5#PBF LTC3642IDD-5#TRPBF LTC3642IMS8E#PBF LTC3642IMS8E#TRPBF LTC3642IMS8E-3.3#PBF LTC3642IMS8E-3.3#TRPBF LTC3642IMS8E-5#PBF LTC3642IMS8E-5#TRPBF
Text Version of Document
LTC3642
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch On-Resistance Switch On-Resistance Switch Leakage Current vs Input Voltage vs Temperature vs Temperature
4.5 5 0.6 VIN = 10V VIN = 45V 4.0 0.5 4 3.5 TOP TOP 3.0 0.4 ANCE (Ω) 3 SW = 0V 2.5 0.3 2.0 BOTTOM BOTTOM 2 1.5 0.2 SW = 45V SWITCH ON-RESIST 1.0 SWITCH ON-RESISTANCE (Ω) 1 SWITCH LEAKAGE CURRENT (µA) 0.1 0.5 0 0 0 0 –40 –10 20 50 80 110 10 20 30 40 50 –40 –10 20 50 80 110 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3642 G11 3642 G12 3642 G10
Run Comparator Threshold Internal Soft-Start Time Efficiency vs Input Voltage Voltage vs Temperature vs Temperature
95 1.30 1.20 FIGURE 11 CIRCUIT ISET OPEN 90 1.25 RISING 1.15 ILOAD = 50mA 85 1.20 1.10 ILOAD = 10mA 80 1.15 1.05 ILOAD = 1mA FALLING EFFICIENCY (%) 75 1.10 1.00 70 1.05 RUN COMPARATOR THRESHOLD (V) INTERNAL SOFT-START TIME (ms) 0.95 65 1.00 0.90 10 15 20 25 30 35 40 45 –40 –10 20 50 80 110 –40 –10 20 50 80 110 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3642 G13 3642 G14 3642 G15
Soft-Start Waveforms Operating Waveforms Load Step Transient Response
OUTPUT VOLTAGE OUTPUT 50mV/DIV VOLTAGE SWITCH 25mV/DIV OUTPUT VOLTAGE VOLTAGE 5V/DIV 1V/DIV LOAD INDUCTOR CURRENT CURRENT 25mA/DIV 50mA/DIV CSS = 0.047µF 5ms/DIV 3642 G16 VIN = 10V 10µs/DIV 3642 G17 VIN = 10V 1ms/DIV 3642 G18 ISET OPEN ISET OPEN ILOAD = 25mA FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT 3642fc 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch On-Resistance Switch On-Resistance Switch Leakage Current vs Input Voltage vs Temperature vs Temperature
4.5 5 0.6 VIN = 10V VIN = 45V 4.0 0.5 4 3.5 TOP TOP 3.0 0.4 ANCE (Ω) 3 SW = 0V 2.5 0.3 2.0 BOTTOM BOTTOM 2 1.5 0.2 SW = 45V SWITCH ON-RESIST 1.0 SWITCH ON-RESISTANCE (Ω) 1 SWITCH LEAKAGE CURRENT (µA) 0.1 0.5 0 0 0 0 –40 –10 20 50 80 110 10 20 30 40 50 –40 –10 20 50 80 110 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3642 G11 3642 G12 3642 G10
Run Comparator Threshold Internal Soft-Start Time Efficiency vs Input Voltage Voltage vs Temperature vs Temperature
95 1.30 1.20 FIGURE 11 CIRCUIT ISET OPEN 90 1.25 RISING 1.15 ILOAD = 50mA 85 1.20 1.10 ILOAD = 10mA 80 1.15 1.05 ILOAD = 1mA FALLING EFFICIENCY (%) 75 1.10 1.00 70 1.05 RUN COMPARATOR THRESHOLD (V) INTERNAL SOFT-START TIME (ms) 0.95 65 1.00 0.90 10 15 20 25 30 35 40 45 –40 –10 20 50 80 110 –40 –10 20 50 80 110 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3642 G13 3642 G14 3642 G15
Soft-Start Waveforms Operating Waveforms Load Step Transient Response
OUTPUT VOLTAGE OUTPUT 50mV/DIV VOLTAGE SWITCH 25mV/DIV OUTPUT VOLTAGE VOLTAGE 5V/DIV 1V/DIV LOAD INDUCTOR CURRENT CURRENT 25mA/DIV 50mA/DIV CSS = 0.047µF 5ms/DIV 3642 G16 VIN = 10V 10µs/DIV 3642 G17 VIN = 10V 1ms/DIV 3642 G18 ISET OPEN ISET OPEN ILOAD = 25mA FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT 3642fc 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
