601-00513 Parallax Inc, 601-00513 Datasheet
601-00513
Specifications of 601-00513
Related parts for 601-00513
601-00513 Summary of contents
Page 1
LM2937-2.5, LM2937-3.3 400mA and 500mA Voltage Regulators General Description The LM2937-2.5 and LM2937-3.3 are positive voltage regu- lators capable of supplying up to 500 mA of load current. Both regulators are ideal for converting a common 5V logic supply, or ...
Page 2
Connection Diagrams and Ordering Information Temperature Range −40˚C ≤ T ≤ 125˚C A −40˚C ≤ T ≤ 85˚C A SOT-223 Package Markings The small physical size of the SOT-223 package does not allow sufficient space to provide the complete device ...
Page 3
Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage Continuous Transient (t ≤ 100 ms) Internal Power Dissipation (Note 2) Maximum Junction Temperature Storage Temperature Range ...
Page 4
Electrical Characteristics Note 5: The minimum input voltage required for proper biasing of these regulators is 4.75V. Below this level the outputs will fall out of regulation. This effect is not the normal dropout characteristic where the output falls out ...
Page 5
Typical Performance Characteristics Line Transient Response Ripple Rejection Maximum Power Dissipation (TO-220) (Continued) Load Transient Response 10011308 10011310 Maximum Power Dissipation 10011312 5 10011309 Output Impedance 10011311 (TO-263) (Note 2) 10011313 www.national.com ...
Page 6
Typical Performance Characteristics Low Voltage Behavior (2.5V) Output at Voltage Extremes Peak Output Current www.national.com (Continued) Low Voltage Behavior (3.3) 10011314 10011316 10011318 6 10011315 Output Capacitor ESR 10011317 ...
Page 7
Typical Application * Required if the regulator is located more than 3 inches from the power supply filter capacitors. ** Required for stability. C must be at least 10 µF (over the full expected operating temperature range) and located as ...
Page 8
Application Hints EXTERNAL CAPACITORS The output capacitor is critical to maintaining regulator sta- bility, and must meet the required conditions for both ESR (Equivalent Series Resistance) and minimum amount of ca- pacitance. MINIMUM CAPACITANCE: The minimum output capacitance required to ...
Page 9
Application Hints (Continued) When a value for θ is found using the equation shown, (H−A) a heatsink must be selected that has a value that is less than or equal to this number. θ is specified numerically by the heatsink ...
Page 10
Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Plastic Package Order Number LM2937ET-2.5, LM2937ET-3.3, NS Package Number T03B TO-263 3-Lead Plastic Surface Mount Package Order Number LM2937ES-2.5, LM2937ES-3.3, NS Package Number TS3B 10 ...
Page 11
Physical Dimensions inches (millimeters) unless otherwise noted (Continued) SOT-223 3-Lead Plastic Surface Mount Package National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time ...