Datasheet LT3471 (Analog Devices) - 3

LT3471
ELECTRICAL CHARACTERISTICS The
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denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are TA = 25°C. VIN = VSHDN = 3V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
SHDN Input Voltage Low Quiescent Current ≤ 1μA 0.3 V SHDN Pin Bias Current VSHDN = 3V, VIN = 4V 22 36 μA VSHDN = 0V 0 0.1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings temperature range are assured by design, characterization and may cause permanent damage to the device. Exposure to any Absolute correlation with statistical process controls. Maximum Rating condition for extended periods may affect device
Note 3:
Current fl ows out of the pin. reliability and lifetime.
Note 4:
See Typical Performance Characteristics for guaranteed current
Note 2:
The LT3471E is guaranteed to meet performance specifi cations limit vs duty cycle. from 0°C to 70°C. Specifi cations over the –40°C to 85°C operating
Note 5:
VCESAT is 100% tested at wafer level only.
TYPICAL PERFORMANCE CHARACTERISTICS Quiescent Current vs Temperature VREF Voltage vs Temperature VREF Voltage vs VREF Current
2.6 1.010 2.4 1.005 VREF 2.2 VOLTAGE (V) 100mV/DIV 1.000 REFV 2.0 0.995 QUIESCENT CURRENT (mA) 1.8 VREF CURRENT 200μA/DIV 3471 G03 1.6 0.990 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3471 G01 3471 G02
SHDN/SS Current Switch Saturation Voltage vs SHDN/SS Voltage Current Limit vs Duty Cycle vs Switch Current
2.2 800 TA = 25°C VIN = 3.3V 2.0 TYPICAL 700 1.8 600 1.6 SHDN/SS 90°C GUARANTEED CURRENT 1.4 500 20μV/DIV 25°C 1.2 (mV) 400 VIN > VSHDN/SS 1.0 CESAT 0.8 V 300 CURRENT LIMIT (A) 0.6 200 SHDN/SS VOLTAGE 1V/DIV 3471 G04 0.4 100 0.2 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 DUTY CYCLE (%) SW CURRENT (A) 3471 G05 3471 G06 3471fb 3