Datasheet LTC3860 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing |
| Pages / Page | 36 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step Transient Response. … |
| File Format / Size | PDF / 451 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step Transient Response. (Single Phase). (2-Phase). (2-Phase with 50% Inductor
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LTC3860
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Response Load Step Transient Response (Single Phase) (2-Phase)
I I LOAD LOAD 10A/DIV 10A/DIV I I L L1 10A/DIV 5A/DIV IL2 VOUT 5A/DIV 50mV/DIV VOUT 50mV/DIV 3860 G01 3860 G02 V 50μs/DIV IN = 12V V 50μs/DIV IN = 12V VOUT = 1.2V VOUT = 1.8V ILOAD STEP = 10A ILOAD STEP = 10A COMP VALUES: R2A = 6.8kΩ, C1A = 470pF, C2A = 100pF
Load Step Transient Response Load Step Transient Response (2-Phase with 50% Inductor (2-Phase) Mismatch)
VOUT(AC) ILOAD 100mV/DIV 10A/DIV ILOAD IL1 20A/DIV 5A/DIV IL1 = 320nH I 10A/DIV L2 5A/DIV IL2 = 220nH V 10A/DIV OUT 50mV/DIV 3860 G04 V 50μs/DIV 3860 G03 IN = 12V V 50μs/DIV IN = 12V VOUT = 1.2V VOUT = 1.2V ILOAD = 0A TO 25A ILOAD STEP = 10A
Effi ciency and Power Loss Effi ciency and Power Loss vs Load Current vs Supply Voltage
100 7 90 6.0 VIN = 6V VOUT = 1.2V 90 V 88 5.5 OUT = 1.2V I 6 OUT = 15A 80 86 5.0 5 POWER LOSS (W) 70 POWER LOSS (W) 84 4.5 60 82 4.0 4 50 80 3.5 3 40 78 3.0 EFFICIENCY (%) EFFICIENCY (%) 30 2 76 2.5 20 74 2.0 1 10 72 1.5 0 0 70 1.0 0.001 0.01 0.1 1 10 100 6 7 8 9 10 11 12 13 14 LOAD CURRENT (A) SUPPLY VOLTAGE (V) 3860 G05 3860 G06 3860fc 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Response Load Step Transient Response (Single Phase) (2-Phase)
I I LOAD LOAD 10A/DIV 10A/DIV I I L L1 10A/DIV 5A/DIV IL2 VOUT 5A/DIV 50mV/DIV VOUT 50mV/DIV 3860 G01 3860 G02 V 50μs/DIV IN = 12V V 50μs/DIV IN = 12V VOUT = 1.2V VOUT = 1.8V ILOAD STEP = 10A ILOAD STEP = 10A COMP VALUES: R2A = 6.8kΩ, C1A = 470pF, C2A = 100pF
Load Step Transient Response Load Step Transient Response (2-Phase with 50% Inductor (2-Phase) Mismatch)
VOUT(AC) ILOAD 100mV/DIV 10A/DIV ILOAD IL1 20A/DIV 5A/DIV IL1 = 320nH I 10A/DIV L2 5A/DIV IL2 = 220nH V 10A/DIV OUT 50mV/DIV 3860 G04 V 50μs/DIV 3860 G03 IN = 12V V 50μs/DIV IN = 12V VOUT = 1.2V VOUT = 1.2V ILOAD = 0A TO 25A ILOAD STEP = 10A
Effi ciency and Power Loss Effi ciency and Power Loss vs Load Current vs Supply Voltage
100 7 90 6.0 VIN = 6V VOUT = 1.2V 90 V 88 5.5 OUT = 1.2V I 6 OUT = 15A 80 86 5.0 5 POWER LOSS (W) 70 POWER LOSS (W) 84 4.5 60 82 4.0 4 50 80 3.5 3 40 78 3.0 EFFICIENCY (%) EFFICIENCY (%) 30 2 76 2.5 20 74 2.0 1 10 72 1.5 0 0 70 1.0 0.001 0.01 0.1 1 10 100 6 7 8 9 10 11 12 13 14 LOAD CURRENT (A) SUPPLY VOLTAGE (V) 3860 G05 3860 G06 3860fc 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
