LP2957AIS National Semiconductor, LP2957AIS Datasheet
LP2957AIS
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LP2957AIS Summary of contents
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... Battery-powered regulator Bent, Staggered Leads 5-Lead TO-220 (T) DS011340-16 Top View Order Number LP2957AIT or LP2957IT See NS Package Number T05D Plastic Surface Mount Package 5-Lead TO-263 (S) DS011340-17 Top View DS011340-18 Side View Order Number LP2957AIS or LP2957IS See NS Package Number TS5B June 1998 www.national.com ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Operating Junction Temperature Range Storage Temperature Range Electrical Characteristics = 25˚C, and limits in boldface type apply over the full operating temperature range. Un- ...
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Electrical Characteristics = 25˚C, and limits in boldface type apply over the full operating temperature range. Un- Limits in standard typeface are for 6V mA, C less otherwise specified Symbol Parameter ...
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Typical Performance Characteristics = 3V 25˚ Ground Pin Current DS011340-19 Ground Pin Current DS011340-22 Ripple Rejection DS011340-25 Line Transient Response DS011340-28 www.national.com Unless otherwise specified: V Ground Pin Current DS011340-20 Ground Pin Current DS011340-23 Ripple Rejection ...
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Typical Performance Characteristics = 3V 25˚C (Continued Load Transient Response DS011340-31 Enable Transient DS011340-34 Thermal Regulation DS011340-37 Unless otherwise specified: V Load Transient Response DS011340-32 Enable Transient DS011340-35 Error Output Sink Current DS011340- ...
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Typical Performance Characteristics = 3V 25˚C (Continued Maximum Power Dissipation (TO-263) (Note 2) DS011340-40 Block Diagram Typical Application Circuits www.national.com Unless otherwise specified: V Error Output Voltage DS011340-41 DS011340-1 LP2957 Basic Application DS011340 ...
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Typical Application Circuits LP2957 Application with Snap-On/Snap-Off Output *See Application Hints Application Hints EXTERNAL CAPACITORS A 2.2 µF (or greater) capacitor is required between the out- put pin and ground to assure stability (refer to Figure 1 ). Without this ...
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Application Hints (Continued − 5 TOTAL *See EXTERNAL CAPACITORS FIGURE 1. Basic 5V Regulator Circuit The next parameter which must be calculated is the maxi- mum allowable temperature rise, T ...
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Application Hints (Continued shutdown mode, ERROR will go high if it has been pulled external supply. To avoid this invalid response, pull up to regulator output Exact value depends on dropout voltage, which ...
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Application Hints (Continued) The difference in input voltage measured at no load and full load defines the amount of hysteresis required for proper snap-on/snap-off operation (the programmed hys- teresis must be greater than the difference in voltages). CALCULATING RESISTOR VALUES: ...
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Application Hints (Continued) Solving for R2: DESIGN EXAMPLE # regulated output powered from a battery made up of six NiCad cells. The cell data is: cell voltage (full charged): 1.4V cell voltage (90% discharged): ...
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Schematic Diagram www.national.com 12 ...
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Physical Dimensions inches (millimeters) unless otherwise noted Order Number LP2957AIT or LP2957IT Bent, Staggered 5-Lead TO-220 (T) NS Package Number T05D 13 www.national.com ...
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... Italiano 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 without notice to change said circuitry and specifications. Order Number LP2957AIS or LP2957IS NS Package Number TS5B 2. A critical component is any component of a life ...