LT3493-3 ELECTRICAL CHARACTERISTICSThe ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 ° C. VIN = 12V, VBOOST = 17V, unless otherwise noted. (Note 2)PARAMETERCONDITIONSMINTYPMAXUNITS Switch Current Limit (Note 3) 1.4 1.75 2.2 A Switch VCESAT ISW = 1A 330 mV Switch Leakage Current 2 µA Minimum Boost Voltage Above Switch ISW = 1A 1.85 2.2 V BOOST Pin Current ISW = 1A 30 50 mA SHDN Input Voltage High 2.3 V SHDN Input Voltage Low 0.3 V SHDN Bias Current VSHDN = 2.3V (Note 5) 6 15 µA VSHDN = 0V 0.01 0.1 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: Current limit guaranteed by design and/or correlation to static test. may cause permanent damage to the device. Exposure to any Absolute Slope compensation reduces current limit at higher duty cycle. Maximum Rating condition for extended periods may affect device Note 4: Current flows out of pin. reliability and lifetime. Note 5: Current flows into pin. Note 2: The LT3493E-3 is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. WUTYPICAL PERFOR A CE CHARACTERISTICS TA = 25 ° C unless otherwise noted.Efficiency (VOUT = 5V, L = 10 µ H)Efficiency (VOUT = 3.3V, L = 10 µ H) 95 90 90 85 85 80 80 75 75 70 70 65 EFFICIENCY (%) EFFICIENCY (%) 65 60 60 V V IN = 8V IN = 8V V 55 V 55 IN = 12V IN = 12V V V IN = 24V IN = 24V 50 50 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) LOAD CURRENT (A) 3493-3 G01 3493-3 G02 3493-3f 3
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