Datasheet LTC3874-1 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | PolyPhase Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing |
| 页数 / 页 | 22 / 5 — Typical perForMance characTerisTics (TA = 25°C unless otherwise … |
| 文件格式/大小 | PDF / 1.0 Mb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics (TA = 25°C unless otherwise specified). Start-Up Into a Prebiased Load
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LTC3874-1
Typical perForMance characTerisTics (TA = 25°C unless otherwise specified) Start-Up Into a Prebiased Load 2-Phase Operation LTC3884-1 Inductor Current at Light Load and LTC3874-1
RUN FORCED ALL RUN PINS CONTINUOUS TIED TOGETHER MODE 2V/DIV 5A/DIV VOUT DISCONTINUOUS IN CCM CONDUCTION 500mV/DIV MODE 5A/DIV 1µs/DIV 38741 G06 2ms/DIV 38741 G07 VIN = 12V VIN 12V VOUT = 1.2V VOUT = 1.2V
Quiescent Current vs Temperature Current Sense Threshold vs without EXTVCC INTVCC Line Regulation ITH Voltage
6 6 100 LOWDCR = L, RANGE = H 80 5 60 LOWDCR = L, 5 4 RANGE = L TAGE (V) (mV) 40 3 VOL 20 Y CURRENT (mA) V ISENSE V CC 4 LOWDCR = H, 2 INT 0 RANGE = L SUPPL LOWDCR = H, 1 –20 RANGE = H 3 0 –40 –50 0 50 100 150 0 10 20 30 40 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) INPUT VOLTAGE (V) VITH (V) 38741 G8 38741 G9 38741 G10
Maximum Current Sense Threshold vs Common Mode Voltage Undervoltage Lockout Threshold Quiescent Current vs Input (LOWDCR = INTV (INTV CC, VITH = 2.18V) CC vs Threshold) Voltage without EXTVCC
30 4.1 6 ILIM = INTVCC 3.9 RISING 25 3.7 20 5 3.5 FALLING 15 3.3 ILIM = GND 3.1 Y CURRENT (mA) 10 4 UVLO THRESHOLD (V) 2.9 SUPPL CURRENT SENSE THRESHOLD (mV) 5 2.7 0 2.5 3 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 –50 –5 45 95 125 0 10 20 30 40 VISENSE COMMON MODE VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 38741 G13 38741 G11 38741 G12 38741f For more information www.linear/LTC3874-1 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Application Related Parts
Typical perForMance characTerisTics (TA = 25°C unless otherwise specified) Start-Up Into a Prebiased Load 2-Phase Operation LTC3884-1 Inductor Current at Light Load and LTC3874-1
RUN FORCED ALL RUN PINS CONTINUOUS TIED TOGETHER MODE 2V/DIV 5A/DIV VOUT DISCONTINUOUS IN CCM CONDUCTION 500mV/DIV MODE 5A/DIV 1µs/DIV 38741 G06 2ms/DIV 38741 G07 VIN = 12V VIN 12V VOUT = 1.2V VOUT = 1.2V
Quiescent Current vs Temperature Current Sense Threshold vs without EXTVCC INTVCC Line Regulation ITH Voltage
6 6 100 LOWDCR = L, RANGE = H 80 5 60 LOWDCR = L, 5 4 RANGE = L TAGE (V) (mV) 40 3 VOL 20 Y CURRENT (mA) V ISENSE V CC 4 LOWDCR = H, 2 INT 0 RANGE = L SUPPL LOWDCR = H, 1 –20 RANGE = H 3 0 –40 –50 0 50 100 150 0 10 20 30 40 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) INPUT VOLTAGE (V) VITH (V) 38741 G8 38741 G9 38741 G10
Maximum Current Sense Threshold vs Common Mode Voltage Undervoltage Lockout Threshold Quiescent Current vs Input (LOWDCR = INTV (INTV CC, VITH = 2.18V) CC vs Threshold) Voltage without EXTVCC
30 4.1 6 ILIM = INTVCC 3.9 RISING 25 3.7 20 5 3.5 FALLING 15 3.3 ILIM = GND 3.1 Y CURRENT (mA) 10 4 UVLO THRESHOLD (V) 2.9 SUPPL CURRENT SENSE THRESHOLD (mV) 5 2.7 0 2.5 3 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 –50 –5 45 95 125 0 10 20 30 40 VISENSE COMMON MODE VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 38741 G13 38741 G11 38741 G12 38741f For more information www.linear/LTC3874-1 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Application Related Parts