LTC3526L/LTC3526LB electricAl chArActeristics Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 4: Current measurements are made when the output is not switching. may cause permanent damage to the device. Exposure to any Absolute Note 5: This IC includes overtemperature protection that is intended Maximum Rating condition for extended periods may affect device to protect the device during momentary overload conditions. Junction reliability and lifetime. temperature will exceed 125°C when overtemperature protection is active. Note 2: The LTC3526LE/LTC3526LBE are guaranteed to meet performance Continuous operation above the specified maximum operating junction specifications from 0°C to 85°C. Specifications over –40°C to 85°C temperature may result in device degradation or failure. operating temperature range are assured by design, characterization and Note 6: Failure to solder the exposed backside of the package to the PC correlation with statistical process controls. board ground plane will result in a thermal resistance much higher than Note 3: Specification is guaranteed by design and not 100% tested in 102°C/W. production. typicAl perForMAnce chArActeristics Efficiency vs Load Current and VINEfficiency vs Load Current and VINNo-Load Input Current vs VINfor VOUT = 1.8V (LTC3526L)for VOUT = 3.3V (LTC3526L)(LTC3526L) 100 1000 100 1000 100 90 90 90 V 80 100 80 100 OUT = 5V 80 POWER LOSS (mW) V POWER LOSS (mW) 70 VIN = 1.0V 70 IN = 1.2V V V 70 VOUT = 3.3V IN = 1.2V IN = 1.8V 60 V 10 V IN = 1.5V 60 IN = 2.4V 10 V 60 50 50 IN = 3.0V (µA) VOUT = 2.5V I IN 50 40 1 40 1 VOUT = 1.8V EFFICIENCY (%) EFFICIENCY (%) 40 30 30 PLOSS AT V 20 0.1 IN = 1.2V 30 PLOSS AT V 20 0.1 IN = 1.0V PLOSS AT VIN = 1.8V 10 PLOSS AT VIN = 1.2V 10 PLOSS AT VIN = 2.4V 20 PLOSS AT VIN = 1.5V PLOSS AT VIN = 3.0V 0 0.01 0 0.01 10 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3526l G01 3526l G02 3526l G04 Efficiency vs Load Current and VINMinimum Load Resistancefor VOUT = 5V (LTC3526L)Maximum Output Current vs VINDuring Start-Up vs VIN 100 1000 400 10000 VOUT = 3.3V V 90 OUT = 3.3V 350 VOUT = 2.5V 80 100POWER LOSS (mW) 300 VOUT = 1.8V 70 1000 60 10 250 50 VIN = 1.2V (mA) 200 V V 40 IN = 2.4V 1 I OUT OUT = 5V V LOAD (Ω) EFFICIENCY (%) IN = 3.6V 150 100 30 VIN = 4.2V PLOSS AT V 100 20 IN = 1.2V 0.1 PLOSS AT VIN = 2.4V 10 PLOSS AT VIN = 3.6V 50 PLOSS AT VIN = 4.2V L = 4.7µH 0 0.01 0 10 0.01 0.1 1 10 100 1000 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0.65 0.75 0.85 0.95 1.05 1.15 LOAD CURRENT (mA) VIN (V) VIN (V) 3526l G03 3526l G05 3526l G06 3526lfc Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
