LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Absolute Maximum Ratings Reverse Current (cathode to anode)..20mA Operating Temperature Range Forward Current (anode to cathode) ..10mA LM4040_I_ _ _.. -40°C to +85°C Continuous Power Dissipation (TA = +70°C) LM4040_E_ _ _ .. -40°C to +125°C 3-Pin SC70 (derate 2.90mW/°C above +70°C) ...235mW Storage Temperature Range .. -65°C to +150°C 3-Pin SOT23 (derate 3mW/°C above +70°C) ..238.1mW Junction Temperature ..+150°C Lead Temperature (soldering, 10s) ...+300°C Soldering Temperature (reflow) ...+260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information 3 SOT23PACKAGE CODEU3+1 Outline Number 21-0051 Land Pattern Number 90-0179Thermal Resistance, Single-Layer Board: Junction to Ambient (θJA) N/A Junction to Case (θJC) N/A Thermal Resistance, Four-Layer Board: Junction to Ambient (θJA) 336°C/W Junction to Case (θJC) 110.10°C/W 3 SC70PACKAGE CODEX3+2 Outline Number 21-0075 Land Pattern Number 90-0208Thermal Resistance, Single-Layer Board: Junction to Ambient (θJA) 340°C/W Junction to Case (θJC) 115°C/W Thermal Resistance, Four-Layer Board: Junction to Ambient (θJA) 340.40°C/W Junction to Case (θJC) 120°C/W For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . www.maximintegrated.com Maxim Integrated │ 2