Datasheet LTM4691 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Low VIN, High Efficiency, Dual 2A Step-Down DC/DC µModule Regulator |
| Páginas / Página | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. … |
| Formato / tamaño de archivo | PDF / 1.2 Mb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. Efficiency vs Load at Different
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LTM4691
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load at Different at Different Modes of Operation Modes of Operation VIN = 3.3V, VOUT = 1.2V VIN = 3.3V, VOUT = 1.8V
100 100 Burst Mode OPERATION 90 Burst Mode OPERATION 90 80 80 PULSE-SKIPPING PULSE-SKIPPING 70 70 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) FORCED CONTINUOUS 30 FORCED CONTINUOUS 30 20 20 10 10 0 0 0.001 0.010 0.100 1.000 10.0 0.001 0.010 0.100 1.000 10.0 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G01 4691 G02
Efficiency vs Load Current Efficiency vs Load Current at 2.25VIN, Channel 2 off at 3.3VIN, Channel 2 off
100 100 FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 95 95 90 90 85 85 EFFICIENCY (%) 80 EFFICIENCY (%) 0.8VOUT 0.8V 80 OUT 1.0VOUT 1.0VOUT 1.2VOUT 75 1.2VOUT 75 1.5VOUT 1.5VOUT 1.8VOUT 1.8VOUT 2.5VOUT 70 70 0 0.5 1 1.5 2 0 0.5 1 1.5 2 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G04 4691 G05
Efficiency vs Load Current Efficiency vs Load Current at 2.25VIN, Both Channels On at 3.3VIN, Both Channels On
100 100 FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 95 95 90 90 85 85 EFFICIENCY (%) 80 EFFICIENCY (%) 80 0.8VOUT 1.0VOUT 75 1.2VOUT 75 0.8VOUT 1.5VOUT 1.5VOUT 1.0VOUT 1.8VOUT 1.8VOUT 1.2VOUT 2.5VOUT 70 70 0 0.5 1 1.5 2 0 0.5 1 1.5 2 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G07 4691 G08 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information VIN to VOUT Step-Down Ratios Output Voltage Programming Input Decoupling Capacitors Output Decoupling Capacitors Mode Selection Operating Frequency and External Synchronization Power GOOD Output Overvoltage Protection Output Voltage Soft-Start Dropout Operation Output Short-Circuit Protection and Recovery Load Sharing Using the Precision RUN Threshold Thermal Considerations and Output Current Derating Safety Considerations Layout Checklist/Example Applications Information Typical Applications Pin Configuration Table LTM4691 Component LGA Pinout Package Description Package Photo Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load at Different at Different Modes of Operation Modes of Operation VIN = 3.3V, VOUT = 1.2V VIN = 3.3V, VOUT = 1.8V
100 100 Burst Mode OPERATION 90 Burst Mode OPERATION 90 80 80 PULSE-SKIPPING PULSE-SKIPPING 70 70 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) FORCED CONTINUOUS 30 FORCED CONTINUOUS 30 20 20 10 10 0 0 0.001 0.010 0.100 1.000 10.0 0.001 0.010 0.100 1.000 10.0 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G01 4691 G02
Efficiency vs Load Current Efficiency vs Load Current at 2.25VIN, Channel 2 off at 3.3VIN, Channel 2 off
100 100 FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 95 95 90 90 85 85 EFFICIENCY (%) 80 EFFICIENCY (%) 0.8VOUT 0.8V 80 OUT 1.0VOUT 1.0VOUT 1.2VOUT 75 1.2VOUT 75 1.5VOUT 1.5VOUT 1.8VOUT 1.8VOUT 2.5VOUT 70 70 0 0.5 1 1.5 2 0 0.5 1 1.5 2 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G04 4691 G05
Efficiency vs Load Current Efficiency vs Load Current at 2.25VIN, Both Channels On at 3.3VIN, Both Channels On
100 100 FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 95 95 90 90 85 85 EFFICIENCY (%) 80 EFFICIENCY (%) 80 0.8VOUT 1.0VOUT 75 1.2VOUT 75 0.8VOUT 1.5VOUT 1.5VOUT 1.0VOUT 1.8VOUT 1.8VOUT 1.2VOUT 2.5VOUT 70 70 0 0.5 1 1.5 2 0 0.5 1 1.5 2 LOAD CURRENT (A) LOAD CURRENT (A) 4691 G07 4691 G08 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information VIN to VOUT Step-Down Ratios Output Voltage Programming Input Decoupling Capacitors Output Decoupling Capacitors Mode Selection Operating Frequency and External Synchronization Power GOOD Output Overvoltage Protection Output Voltage Soft-Start Dropout Operation Output Short-Circuit Protection and Recovery Load Sharing Using the Precision RUN Threshold Thermal Considerations and Output Current Derating Safety Considerations Layout Checklist/Example Applications Information Typical Applications Pin Configuration Table LTM4691 Component LGA Pinout Package Description Package Photo Related Parts