Datasheet LT3990, LT3990-3.3, LT3990-5 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 62V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| Pages / Page | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 307 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Maximum Load Current. Load Regulation
Model Line for this Datasheet
- LT3990EDD#PBF LT3990EDD#TRPBF LT3990EMSE#PBF LT3990EMSE#TRPBF LT3990EMSE-3.3#PBF LT3990EMSE-3.3#TRPBF LT3990EMSE-5#PBF LT3990EMSE-5#TRPBF LT3990EMSE-5#WTRPBF LT3990HMSE#PBF LT3990HMSE#TRPBF LT3990HMSE-3.3#PBF LT3990HMSE-3.3#TRPBF LT3990HMSE-5#PBF LT3990HMSE-5#TRPBF LT3990IDD#PBF LT3990IDD#TRPBF LT3990IMSE#PBF LT3990IMSE#TRPBF LT3990IMSE-3.3#PBF LT3990IMSE-3.3#TRPBF LT3990IMSE-5#PBF LT3990IMSE-5#TRPBF
Text Version of Document
LT3990/LT3990-3.3/LT3990-5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Maximum Load Current Load Regulation Switch Current Limit
600 0.25 800 H-GRADE 0.20 500 LIMITED BY CURRENT LIMIT 700 SWITCH PEAK 0.15 CURRENT LIMIT 400 0.10 600 LIMITED BY MAXIMUM 0.05 300 JUNCTION TEMPERATURE 500 θJA = 45°C/W 0 LOAD CURRENT (A) 200 –0.05 400 CATCH DIODE VALLEY CURRENT LIMIT LOAD REGULATION (%) –0.10 100 FRONT PAGE APPLICATION SWITCH CURRENT LIMIT (mA) 300 VIN = 12V –0.15 FRONT PAGE APPLICATION VOUT = 5V REFERENCED FROM VOUT AT 100mA LOAD 0 –0.20 200 –50 –25 0 25 50 75 100 125 150 0 50 100 150 200 250 300 350 0 20 40 60 80 100 TEMPERATURE (°C) LOAD CURRENT (mA) DUTY CYCLE (%) 3990 G10 3990 G11 3990 G12
Minimum Switch Current Limit Switching Frequency Switch On-Time/Switch Off-Time
900 2.4 250 LOAD CURRENT = 175mA 2.2 225 800 2.0 200 SWITCH PEAK CURRENT LIMIT 1.8 700 175 1.6 MINIMUM ON-TIME 1.4 150 600 1.2 125 1.0 100 500 FREQUENCY (MHz) 0.8 75 MINIMUM OFF-TIME CATCH DIODE VALLEY CURRENT LIMIT 0.6 SWITCH CURRENT LIMIT (mA) 400 50 0.4 0.2 SWITCH ON-TIME/SWITCH OFF-TIME (ns) 25 300 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3990 G13 3990 G14 3990 G15
Switch VCESAT (ISW = 200mA) vs Temperature Switch VCESAT BOOST Pin Current
300 600 21 500 18 (mV) 15 250 400 (mV) T CESAT 12 CESA 300 9 200 200 SWITCH V 6 BOOST PIN CURRENT (mA) SWITCH CURRENT V 100 3 150 0 0 –50 –25 0 25 50 75 100 125 150 0 100 200 300 400 500 0 100 200 300 400 500 TEMPERATURE (°C) SWITCH CURRENT (mA) SWITCH CURRENT (mA) 3990 G16 3990 G17 3990 G18 3990fa 5 Document Outline Features Applications Description 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. Maximum Load Current Load Regulation Switch Current Limit
600 0.25 800 H-GRADE 0.20 500 LIMITED BY CURRENT LIMIT 700 SWITCH PEAK 0.15 CURRENT LIMIT 400 0.10 600 LIMITED BY MAXIMUM 0.05 300 JUNCTION TEMPERATURE 500 θJA = 45°C/W 0 LOAD CURRENT (A) 200 –0.05 400 CATCH DIODE VALLEY CURRENT LIMIT LOAD REGULATION (%) –0.10 100 FRONT PAGE APPLICATION SWITCH CURRENT LIMIT (mA) 300 VIN = 12V –0.15 FRONT PAGE APPLICATION VOUT = 5V REFERENCED FROM VOUT AT 100mA LOAD 0 –0.20 200 –50 –25 0 25 50 75 100 125 150 0 50 100 150 200 250 300 350 0 20 40 60 80 100 TEMPERATURE (°C) LOAD CURRENT (mA) DUTY CYCLE (%) 3990 G10 3990 G11 3990 G12
Minimum Switch Current Limit Switching Frequency Switch On-Time/Switch Off-Time
900 2.4 250 LOAD CURRENT = 175mA 2.2 225 800 2.0 200 SWITCH PEAK CURRENT LIMIT 1.8 700 175 1.6 MINIMUM ON-TIME 1.4 150 600 1.2 125 1.0 100 500 FREQUENCY (MHz) 0.8 75 MINIMUM OFF-TIME CATCH DIODE VALLEY CURRENT LIMIT 0.6 SWITCH CURRENT LIMIT (mA) 400 50 0.4 0.2 SWITCH ON-TIME/SWITCH OFF-TIME (ns) 25 300 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3990 G13 3990 G14 3990 G15
Switch VCESAT (ISW = 200mA) vs Temperature Switch VCESAT BOOST Pin Current
300 600 21 500 18 (mV) 15 250 400 (mV) T CESAT 12 CESA 300 9 200 200 SWITCH V 6 BOOST PIN CURRENT (mA) SWITCH CURRENT V 100 3 150 0 0 –50 –25 0 25 50 75 100 125 150 0 100 200 300 400 500 0 100 200 300 400 500 TEMPERATURE (°C) SWITCH CURRENT (mA) SWITCH CURRENT (mA) 3990 G16 3990 G17 3990 G18 3990fa 5 Document Outline Features Applications Description 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
