Datasheet LT8608, LT8608B (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 42V, 1.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| Pages / Page | 24 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency (5V Output, Burst Mode. … |
| Revision | D |
| File Format / Size | PDF / 2.7 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency (5V Output, Burst Mode. Efficiency (3.3V Output, 2MHz,. Operation)
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Text Version of Document
LT8608/LT8608B
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency (5V Output, Burst Mode Efficiency (5V Output, Burst Mode Efficiency (3.3V Output, 2MHz, Operation) Mode Operation) Operation) Mode Operation) Burst Mode Operation Mode Operation) )
100 100 100 95 VIN = 12V 90 VIN = 12V 95 VIN = 12V 90 80 90 85 VIN = 24V 70 VIN = 24V 85 V 80 IN = 24V 60 80 75 50 75 70 40 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 65 30 65 60 SYNC = 0V OR LT8608 DFN 20 SYNC = 0V OR LT8608 DFN 60 SYNC = 0V OR LT8608 DFN 55 L = 2.2µH 10 L = 2.2µH L = 2.2µH f 55 SW = 2MHz fSW = 2MHz fSW = 2MHz 50 0 50 0.00 0.25 0.50 0.75 1.00 1.25 1.50 0.001 0.01 0.1 1 10 100 1k 10k 0.00 0.25 0.50 0.75 1.00 1.25 1.50 IOUT (A) IOUT (mA) IOUT (A) 8608 G01 8608 G02 8608 G03
Efficiency (3.3V Output, 2MHz, Burst Mode Operation Mode Operation) ) FB Voltage FB V Load Regulation Load Regulation
100 780 0.5 90 VIN = 12V 0.4 80 779 0.3 70 VIN = 24V 0.2 60 TAGE (mV) (%) 778 0.1 OUT 50 0.0 40 TION VOL EFFICIENCY (%) 777 –0.1 30 CHANGE IN V –0.2 20 SYNC = 0V OR LT8608 DFN 776 –0.3 L = 2.2µH FB REGULA 10 fSW = 2MHz –0.4 00.001 0.01 0.1 1 10 100 1k 10k 775 –0.5 –50 –10 30 70 110 150 0 0.25 0.50 0.75 1 1.25 1.50 IOUT (mA) OUTPUT CURRENT (A) 8608 G04 TEMPERATURE (°C) 8608 G05 8608G06
No-Load Supply Current No-Load Supply Current (3.3V Output) (3.3V Output) vs Temperature Line Regulation (Not Switching)
0.20 4.00 3.3 SYNC = 0V OR LT8608 DFN SYNC = 0V OR LT8608 DFN 3.1 0.15 3.75 2.9 0.10 3.50 2.7 (%) 0.05 3.25 2.5 OUT 0.00 (µA) 3.00 2.3 I IN 2.1 –0.05 2.75 1.9 CHANGE IN V INPUT CURRENT (µA) –0.10 2.50 1.7 –0.15 2.25 1.5 –0.20 2.00 1.3 2 10 18 26 34 42 2 10 18 26 34 42 –50 –10 30 70 110 150 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 8608 G08 8608 G09 8608 G07 Rev C 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency (5V Output, Burst Mode Efficiency (5V Output, Burst Mode Efficiency (3.3V Output, 2MHz, Operation) Mode Operation) Operation) Mode Operation) Burst Mode Operation Mode Operation) )
100 100 100 95 VIN = 12V 90 VIN = 12V 95 VIN = 12V 90 80 90 85 VIN = 24V 70 VIN = 24V 85 V 80 IN = 24V 60 80 75 50 75 70 40 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 65 30 65 60 SYNC = 0V OR LT8608 DFN 20 SYNC = 0V OR LT8608 DFN 60 SYNC = 0V OR LT8608 DFN 55 L = 2.2µH 10 L = 2.2µH L = 2.2µH f 55 SW = 2MHz fSW = 2MHz fSW = 2MHz 50 0 50 0.00 0.25 0.50 0.75 1.00 1.25 1.50 0.001 0.01 0.1 1 10 100 1k 10k 0.00 0.25 0.50 0.75 1.00 1.25 1.50 IOUT (A) IOUT (mA) IOUT (A) 8608 G01 8608 G02 8608 G03
Efficiency (3.3V Output, 2MHz, Burst Mode Operation Mode Operation) ) FB Voltage FB V Load Regulation Load Regulation
100 780 0.5 90 VIN = 12V 0.4 80 779 0.3 70 VIN = 24V 0.2 60 TAGE (mV) (%) 778 0.1 OUT 50 0.0 40 TION VOL EFFICIENCY (%) 777 –0.1 30 CHANGE IN V –0.2 20 SYNC = 0V OR LT8608 DFN 776 –0.3 L = 2.2µH FB REGULA 10 fSW = 2MHz –0.4 00.001 0.01 0.1 1 10 100 1k 10k 775 –0.5 –50 –10 30 70 110 150 0 0.25 0.50 0.75 1 1.25 1.50 IOUT (mA) OUTPUT CURRENT (A) 8608 G04 TEMPERATURE (°C) 8608 G05 8608G06
No-Load Supply Current No-Load Supply Current (3.3V Output) (3.3V Output) vs Temperature Line Regulation (Not Switching)
0.20 4.00 3.3 SYNC = 0V OR LT8608 DFN SYNC = 0V OR LT8608 DFN 3.1 0.15 3.75 2.9 0.10 3.50 2.7 (%) 0.05 3.25 2.5 OUT 0.00 (µA) 3.00 2.3 I IN 2.1 –0.05 2.75 1.9 CHANGE IN V INPUT CURRENT (µA) –0.10 2.50 1.7 –0.15 2.25 1.5 –0.20 2.00 1.3 2 10 18 26 34 42 2 10 18 26 34 42 –50 –10 30 70 110 150 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 8608 G08 8608 G09 8608 G07 Rev C 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
