Datasheet LTC3418 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 8A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 22 / 5 — Typical perForMance characTerisTics TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 494 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C unless otherwise noted. Efficiency vs Load Current. Peak Inductor Current
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LTC3418
Typical perForMance characTerisTics TA = 25°C unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current
100 100 100 Burst Mode OPERATION 3.3V 90 90 90 3.3V 80 80 80 5V 5V 70 70 70 FORCED CONTINUOUS 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 20 20 10 VIN = 3.3V 10 FORCED CONTINUOUS 10 Burst Mode OPERATION VOUT = 2.5V V VOUT = 2.5V 0 0 OUT = 2.5V 0 0.01 0.1 1 10 0.01 0.1 1 10 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3418 G10 3418 G11 3418 G12
Peak Inductor Current vs Burst Clamp Voltage Load Regulation Load Step Transient
12 0 VIN = 3.3V VOUT = 1.8V 10 –0.05 f = 1MHz OUTPUT VOLTAGE 100mV/DIV 8 –0.10 (%) 6 OUT/V –0.15 INDUCTOR CURRENT 4 V OUT Δ –0.20 5A/DIV PEAK INDUCTOR CURRENT (A) 5V 2 –0.25 3418 G15 3.3V VIN = 3.3V 20µs/DIV VOUT = 2.5V 0 –0.30 LOAD STEP: 800mA TO 8A 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 1 2 3 4 5 6 7 8 VBCLAMP (V) LOAD CURRENT (A) 3418 G13 3418 G14
Load Step Transient Burst Mode Operation Start-Up Transient
OUTPUT OUTPUT VOLTAGE VOLTAGE 100mV/DIV OUTPUT 100mV/DIV VOLTAGE 500mV/DIV INDUCTOR CURRENT INDUCTOR 5A/DIV CURRENT INDUCTOR 1A/DIV CURRENT 2A/DIV 3418 G18 V 3418 G16 3418 G17 IN = 3.3V 40µs/DIV VIN = 3.3V 20µs/DIV VIN = 3.3V 1ms/DIV VOUT = 2.5V VOUT = 2.5V VOUT = 2.5V LOAD STEP: 3A TO 8A LOAD: 200mA LOAD: 8A 3418fc For more information www.linear.com/LTC3418 5 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current
100 100 100 Burst Mode OPERATION 3.3V 90 90 90 3.3V 80 80 80 5V 5V 70 70 70 FORCED CONTINUOUS 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 20 20 10 VIN = 3.3V 10 FORCED CONTINUOUS 10 Burst Mode OPERATION VOUT = 2.5V V VOUT = 2.5V 0 0 OUT = 2.5V 0 0.01 0.1 1 10 0.01 0.1 1 10 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3418 G10 3418 G11 3418 G12
Peak Inductor Current vs Burst Clamp Voltage Load Regulation Load Step Transient
12 0 VIN = 3.3V VOUT = 1.8V 10 –0.05 f = 1MHz OUTPUT VOLTAGE 100mV/DIV 8 –0.10 (%) 6 OUT/V –0.15 INDUCTOR CURRENT 4 V OUT Δ –0.20 5A/DIV PEAK INDUCTOR CURRENT (A) 5V 2 –0.25 3418 G15 3.3V VIN = 3.3V 20µs/DIV VOUT = 2.5V 0 –0.30 LOAD STEP: 800mA TO 8A 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 1 2 3 4 5 6 7 8 VBCLAMP (V) LOAD CURRENT (A) 3418 G13 3418 G14
Load Step Transient Burst Mode Operation Start-Up Transient
OUTPUT OUTPUT VOLTAGE VOLTAGE 100mV/DIV OUTPUT 100mV/DIV VOLTAGE 500mV/DIV INDUCTOR CURRENT INDUCTOR 5A/DIV CURRENT INDUCTOR 1A/DIV CURRENT 2A/DIV 3418 G18 V 3418 G16 3418 G17 IN = 3.3V 40µs/DIV VIN = 3.3V 20µs/DIV VIN = 3.3V 1ms/DIV VOUT = 2.5V VOUT = 2.5V VOUT = 2.5V LOAD STEP: 3A TO 8A LOAD: 200mA LOAD: 8A 3418fc For more information www.linear.com/LTC3418 5 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts