LT3503 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) 1.45 1.75 2.2 A Switch VCESAT ISW = 1A 400 mV Switch Leakage Current 2 µA Minimum Boost Voltage Above Switch ISW = 1A 2 2.3 V BOOST Pin Current ISW = 1A 25 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 LT3503E 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 = 3.3V)Efficiency (VOUT = 5V) 90 90 L = 2.5µH L = 3.3µH 88 88 VIN = 12V 86 86 VIN = 8V 84 84 VIN = 16V 82 VIN = 12V 82 80 80 78 78 EFFICIENCY (%) EFFICIENCY (%) 76 76 74 74 72 72 70 70 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) 3503 G01 3503 G02 3503f 3
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