Datasheet LTC3874 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | PolyPhase Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing |
| Seiten / Seite | 30 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise … |
| Dateiformat / Größe | PDF / 919 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified). Efficiency vs Output Current
Modelllinie für dieses Datenblatt
Textversion des Dokuments
LTC3874
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified) Efficiency vs Output Current Efficiency vs Output Current Dual Phase Efficiency and Power and Mode and Mode Loss vs Output Current
100 100 100 14 VIN = 12V 90 90 VOUT = 1.8V 12 CCM 80 80 95 DCM 70 70 10 POWER LOSS (W) EFFICIENCY DCM 90 60 60 8 V CCM V 50 IN = 12V IN = 12V CCM V 50 85 OUT = 1.2V VOUT = 1.8V 40 40 POWER LOSS 6 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 30 30 4 0.32mΩ 20 20 75 1.5mΩ 2 10 10 0.32mΩ 1.5mΩ 0 0 70 0 0.1 1 10 100 0.1 1 10 100 0 10 20 30 40 50 60 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3874 G01 3874 G02 3874 G03
Load Step (Forced Continuous Load Step (Discontinuous Mode) 3-Phase with Master Conduction Mode) 3-Phase with Controller LTC3866 Master Controller LTC3866
IL(MASTER) IL(MASTER) 20A/DIV 20A/DIV IL(SLAVE1) IL(SLAVE1) 20A/DIV 20A/DIV IL(SLAVE0) IL(SLAVE0) 20A/DIV 20A/DIV VOUT VOUT 200mV/DIV 200mV/DIV AC-COUPLED AC-Coupled 50µs/DIV 3874 G04 50µs/DIV 3874 G05 VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V ILOAD 5A TO 50A ILOAD 5A TO 50A
Start-Up Into a Pre-Biased Output Inductor Current at Light Load with Master Controller LTC3875
FORCED CONTINUOUS RUN MODE 5V/DIV 5A/DIV OV DISCONTINUOUS V CONDUCTION OUT 1V/DIV MODE OV 5A/DIV 1µs/DIV 3874 G06 20ms/DIV 3874 G06a VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.0V ILOAD = 2A 3874fb For more information www.linear.com/LTC3874 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified) Efficiency vs Output Current Efficiency vs Output Current Dual Phase Efficiency and Power and Mode and Mode Loss vs Output Current
100 100 100 14 VIN = 12V 90 90 VOUT = 1.8V 12 CCM 80 80 95 DCM 70 70 10 POWER LOSS (W) EFFICIENCY DCM 90 60 60 8 V CCM V 50 IN = 12V IN = 12V CCM V 50 85 OUT = 1.2V VOUT = 1.8V 40 40 POWER LOSS 6 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 30 30 4 0.32mΩ 20 20 75 1.5mΩ 2 10 10 0.32mΩ 1.5mΩ 0 0 70 0 0.1 1 10 100 0.1 1 10 100 0 10 20 30 40 50 60 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3874 G01 3874 G02 3874 G03
Load Step (Forced Continuous Load Step (Discontinuous Mode) 3-Phase with Master Conduction Mode) 3-Phase with Controller LTC3866 Master Controller LTC3866
IL(MASTER) IL(MASTER) 20A/DIV 20A/DIV IL(SLAVE1) IL(SLAVE1) 20A/DIV 20A/DIV IL(SLAVE0) IL(SLAVE0) 20A/DIV 20A/DIV VOUT VOUT 200mV/DIV 200mV/DIV AC-COUPLED AC-Coupled 50µs/DIV 3874 G04 50µs/DIV 3874 G05 VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V ILOAD 5A TO 50A ILOAD 5A TO 50A
Start-Up Into a Pre-Biased Output Inductor Current at Light Load with Master Controller LTC3875
FORCED CONTINUOUS RUN MODE 5V/DIV 5A/DIV OV DISCONTINUOUS V CONDUCTION OUT 1V/DIV MODE OV 5A/DIV 1µs/DIV 3874 G06 20ms/DIV 3874 G06a VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.0V ILOAD = 2A 3874fb For more information www.linear.com/LTC3874 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts