Datasheet LTC3874-1 (Analog Devices) - 5

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