Datasheet LT3502, LT3502A (Analog Devices) - 3

LT3502/LT3502A
electrical characteristics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 5V, VBOOST = 15V. PARAMETER CONDITIONS MIN TYP MAX UNITS
Undervoltage Lockout 2.6 2.8 3 V Quiescent Current at Shutdown VSHDN = 0V 0.5 2 µA Quiescent Current Not Switching 1.5 2 mA Feedback Voltage 2mm × 2mm DFN l 0.785 0.8 0.813 V 2mm × 2mm DFN 0.79 0.8 0.81 V MS10 l 0.780 0.8 0.816 V MS10 0.786 0.8 0.813 V Reference Voltage Line Regulation 0.005 %/V FB Pin Bias Current (Note 5) l 15 50 nA Switching Frequency IDA < 500mA (LT3502A) 1.9 2.25 2.7 MHz IDA < 500mA (LT3502A) l 1.8 2.25 2.8 MHz IDA < 500mA (LT3502) 0.9 1.1 1.3 MHz IDA < 500mA (LT3502) l 0.8 1.1 1.4 MHz Maximum Duty Cycle 100mA Load (LT3502A) 70 80 % 100mA Load (LT3502) 80 90 % Switch VCESAT ISW = 500mA 450 mV Switch Current Limit (Note 3) 0.75 0.9 1.1 A Switch Active Current SW = 10V (Note 4) 95 130 µA SW = 0V (Note 5) 8 30 µA BOOST Pin Current ISW = 500mA 10 13 mA Minimum BOOST Voltage Above Switch ISW = 500mA 1.9 2.2 V BOOST Schottky Forward Drop IOUT = 100mA 0.8 1 V DA Pin Current to Stop OSC 500 650 mA SHDN Bias Current VSHDN = 5V 55 80 µA VSHDN = 0V 1 µA SHDN Input Voltage High 2 V SHDN Input Voltage Low 0.3 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings with statistical process controls. The LT3502IDC and LT3502AIDC are may cause permanent damage to the device. Exposure to any Absolute guaranteed over the – 40°C to 125°C operating junction temperature Maximum Rating condition for extended periods may affect device range. reliability and lifetime.
Note 3:
Current limit guaranteed by design and/or correlation to static test.
Note 2.
The LT3502EDC and LT3502AEDC are guaranteed to meet Slope compensation reduces current limit at higher duty cycle. performance specifications from 0°C to 125°C junction temperature
Note 4:
Current flows into pin. range. Specifications over the –40°C to 125°C operating junction
Note 5:
Current flows out of pin. temperature range are assured by design, characterization and correlation 3502fd 3 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 Typical Application Related Parts