LM2830XMF National Semiconductor, LM2830XMF Datasheet
LM2830XMF
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LM2830XMF Summary of contents
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... Additional features include internal soft-start cir- cuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection. Typical Application Circuit © 2006 National Semiconductor Corporation Features n Space Saving SOT23-5 Package n Input voltage range of 3.0V to 5.5V n Output voltage range of 0. ...
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... Connection Diagrams 6-Pin LLP Ordering Information Frequency Order Number Option LM2830XMF 1.6MHz LM2830XMFX LM2830ZMF LM2830ZMFX 3MHz LM2830ZSD LM2830ZSDX NOPB versions available as well www.national.com 20197401 NSC Package Package Type Drawing SOT23-5 MF05A SOT23-5 MF05A LLP-6 SDE06A 2 20197403 5-Pin SOT-23 Top Mark Supplied As ...
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Pin Descriptions 5-Pin SOT23 Pin Name Function 1 SW Output switch. Connect to the inductor and catch diode. 2 GND Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin. ...
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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. VIN FB Voltage EN Voltage SW Voltage ESD Susceptibility Junction Temperature (Note 2) Electrical Characteristics standard type are for T = 25˚C only; limits in boldface type apply over the junction temperature (T J +125˚ ...
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Electrical Characteristics standard type are for T = 25˚C only; limits in boldface type apply over the junction temperature (T J +125˚C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely ...
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Typical Performance Characteristics plication circuit shown in Application Information section of this datasheet. T η vs Load "X" Vin = 5V 1.8V & 3.3V η vs Load "X and Z" Vin = 3.3V 1.8V Load Regulation ...
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Typical Performance Characteristics application circuit shown in Application Information section of this datasheet. T specified. (Continued) Oscillator Frequency vs Temperature - "X" Current Limit vs Temperature Vin = 3.3V RDSON vs Temperature (SOT23-5 Package) All curves taken at VIN = ...
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Typical Performance Characteristics application circuit shown in Application Information section of this datasheet. T specified. (Continued) LM2830Z I (Quiescent Current Temperature FB Gain vs Frequency (Vin = 5V 1.2V www.national.com All curves taken at VIN ...
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Simplified Block Diagram FIGURE 1. 9 20197404 www.national.com ...
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Applications Information THEORY OF OPERATION The LM2830 is a constant frequency PWM buck regulator IC that delivers a 1.0A load current. The regulator has a preset switching frequency of 1.6MHz or 3.0MHz. This high fre- quency allows the LM2830 to ...
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Design Guide (Continued) FIGURE 3. Inductor Current In general, ) → 0 ∆ OUT If ∆i = 20% of 1A, the peak current in the inductor will be L 1.2A. The minimum guaranteed ...
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Design Guide (Continued) significantly with little detriment to the regulator stability. Like the input capacitor, recommended multilayer ceramic ca- pacitors are X7R or X5R types. CATCH DIODE The catch diode (D1) conducts during the switch off-time. A Schottky diode is ...
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Calculating Efficiency, and Junction Temperature The complete LM2830 DC/DC converter efficiency can be calculated in the following manner. Or Calculations for determining the most significant power losses are shown below. Other losses totaling less than 2% are not discussed. Power ...
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... Once this is determined, the maximum ambient temperature allowed for a desired junction temperature can be found. An example of calculating R National Semiconductor LM2830 LLP demonstration board is shown below. The four layer PCB is constructed using FR4 with copper traces. The copper ground plane is on the bottom layer ...
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LLP Package (Continued) FIGURE 5. 6-Lead LLP PCB Dog Bone Layout 20197406 15 www.national.com ...
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LM2830X Design Example 1 FIGURE 6. LM2830X (1.6MHz): Vin = 5V 1.2V Part ID U1 C1, Input Cap C2, Output Cap D1, Catch Diode 0. www.national.com Bill of Materials Part Value Manufacturer 1.0A Buck ...
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LM2830X Design Example 2 FIGURE 7. LM2830X (1.6MHz): Vin = 5V 0.6V Part ID U1 1.0A Buck Regulator C1, Input Cap C2, Output Cap D1, Catch Diode 0. Bill of Materials Part Value ...
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LM2830X Design Example 3 FIGURE 8. LM2830X (1.6MHz): Vin = 5V 3.3V Part ID U1 C1, Input Cap C2, Output Cap D1, Catch Diode 0. www.national.com Bill of Materials Part Value Manufacturer 1.0A Buck ...
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LM2830Z Design Example 4 FIGURE 9. LM2830Z (3MHz): Vin = 5V 3.3V Part ID U1 1.0A Buck Regulator C1, Input Cap 22µF, 6.3V, X5R C2, Output Cap 22µF, 6.3V, X5R D1, Catch Diode 0. ...
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LM2830Z Design Example 5 FIGURE 10. LM2830Z (3MHz): Vin = 5V 1.2V Part ID U1 C1, Input Cap C2, Output Cap D1, Catch Diode 0. www.national.com Bill of Materials Part Value Manufacturer 1.0A Buck ...
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LM2830X Dual Converters with Delayed Enabled Design Example 6 FIGURE 11. LM2830X (1.6MHz): Vin = 5V 1.2V Part ID U1 C1, C3 Input Cap C2, C4 Output Cap C7 D1, D2 Catch Diode 0.3V L1, L2 ...
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LM2830X Buck Converter & Voltage Double Circuit with LDO Follower Design Example 7 FIGURE 12. LM2830X (1.6MHz): Vin = 5V 3.3V Part ID U1 1.0A Buck Regulator U2 C1, Input Cap 22µF, 6.3V, X5R C2, Output Cap 22µF, ...
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Physical Dimensions inches (millimeters) unless otherwise noted 5-Lead SOT-23 Package NS Package Number MF05A 6-Lead LLP Package NS Package Number SDE06A 23 www.national.com ...
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