Datasheet LTC3535 (Analog Devices) - 3

LTC3535
ELECTRICAL CHARACTERISTICS (For each channel) The
l
denotes the specifications which apply over the specified operating temperature range of –40°C to 85°C, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Duty Cycle VFB = 1.3V l 0 % Switching Frequency l 0.75 1 1.25 MHz SHDN Pin Input High Voltage 0.8 V SHDN Pin Input Low Voltage 0.3 V
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 LTC3535 is guaranteed to meet performance specifications Continuous operation above the specified maximum operating junction from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature may result in device degradation or failure. temperature range are assured by design, characterization and correlation
Note 6:
Failure to solder the exposed backside of the package to the PC 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 43°C/W. production.
TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current and VIN for VOUT = 1.8V and VIN for VOUT = 3.3V No-Load Input Current vs VIN
100 1000 100 1000 100 EFFICIENCY 90 EFFICIENCY 90 90 V 80 100 80 100 OUT = 5V 80 POWER LOSS (mW) POWER LOSS (mW) 70 70 70 VOUT = 3.3V 60 10 60 10 60 VOUT = 2.5V 50 50 (µA) POWER LOSS POWER LOSS I IN 50 V 40 1 40 1 OUT = 1.8V EFFICIENCY (%) EFFICIENCY (%) 40 30 30 VIN = 1.2V 20 V 0.1 30 IN = 1.0V 20 V 0.1 IN = 1.8V V 10 IN = 1.2V VIN = 2.4V 20 V 10 IN = 1.5V 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) 3535 G01 3535 G02 3535 G04 3535fa 3 Document Outline Features Description Applcations Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts