LM2599SX-3.3/NOPB National Semiconductor, LM2599SX-3.3/NOPB Datasheet
LM2599SX-3.3/NOPB
Specifications of LM2599SX-3.3/NOPB
*LM2599SX-3.3/NOPB
LM2599SX-3.3
Related parts for LM2599SX-3.3/NOPB
LM2599SX-3.3/NOPB Summary of contents
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... Output Voltage Versions) SIMPLE SWITCHER ® and Switchers Made Simple ® are registered trademarks of National Semiconductor Corporation. © 2001 National Semiconductor Corporation Power Converter 150 kHz 3A ® standby current. Self protection features include a two stage current limit for the output switch and an over temperature shutdown for complete protection under fault conditions ...
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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. Maximum Supply Voltage ( /SS Pin Input Voltage (Note 2) Delay Pin Voltage (Note 2) Flag Pin Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) ...
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LM2599-12 Electrical Characteristics Specifications with standard type face are for T ture Range. Symbol Parameter SYSTEM PARAMETERS (Note 6) Test Circuit Figure 1 V Output Voltage 15V OUT Efficiency V IN LM2599-ADJ Electrical Characteristics Specifications with standard type face are ...
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All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V sion 500 mA LOAD Symbol Parameter DEVICE PARAMETERS I Operating Quiescent Q Current I Standby Quiescent STBY Current ...
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All Output Voltage Versions Electrical Characteristics Note 8: No diode, inductor or capacitor connected to output pin. Note 9: Feedback pin removed from output and connected force the output transistor switch ON. Note 10: Feedback pin removed ...
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Typical Performance Characteristics Feedback Pin Bias Current DS012582-11 Soft-start DS012582-14 Soft-start Response www.national.com (Circuit of Figure 1 ) (Continued) Flag Saturation Voltage DS012582-12 Shutdown /Soft-start Current DS012582-15 Shutdown/Soft-start Threshold Voltage DS012582-18 6 Switching Frequency DS012582-13 Daisy Pin Current DS012582-16 DS012582-53 ...
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Typical Performance Characteristics Continuous Mode Switching Waveforms V = 20V 5V OUT LOAD µ 220 µF, C ESR = 50 m OUT OUT A: Output Pin Voltage, 10V/div. B: ...
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Test Circuit and Layout Guidelines Component Values shown are for V = 15V 5V 3A. OUT LOAD C — 470 µF, 50V, Aluminum Electrolytic Nichicon “PL Series” — 220 µF, 25V Aluminum Electrolytic, ...
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Test Circuit and Layout Guidelines where V = 1.23V REF Select approximately use a 1% resistor for best stability. 1 Component Values shown are for V = 20V 10V ...
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LM2599 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) Given Regulated Output Voltage (3.3V 12V) OUT V (max) = Maximum DC Input Voltage IN I (max) = Maximum Load Current LOAD 1. ...
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LM2599 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) 3. Catch Diode Selection (D1) A. The catch diode current rating must be at least 1.3 times greater than the maximum load current. Also, if the power ...
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LM2599 Series Buck Regulator Design Procedure (Fixed Output) Conditions Output Load Max Input Voltage Current Voltage (V) ( ...
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LM2599 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) PROCEDURE (Adjustable Output Voltage Version) 2. Inductor Selection (L1) A. Calculate the inductor Volt • microsecond constant E • • µs), from the following formula: where V = internal ...
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LM2599 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) PROCEDURE (Adjustable Output Voltage Version) 5. Catch Diode Selection (D1) A. The catch diode current rating must be at least 1.3 times greater than the maximum load current. Also, if the ...
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LM2599 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) Output Through Hole Output Capacitor Voltage Panasonic Nichicon PL (V) HFQ Series Series (µF/V) (µF/V) 2 820/35 820/35 4 560/35 470/35 6 470/25 470/25 9 330/25 330/ 330/25 330/25 ...
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LM2599 Series Buck Regulator Design Procedure Inductance Current (µH) (A) Through L15 22 0.99 67148350 L21 68 0.99 67144070 L22 47 1.17 67144080 L23 33 1.40 67144090 L24 22 1.70 67148370 L25 15 2.1 67148380 L26 330 0.80 67144100 L27 ...
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LM2599 Series Buck Regulator Design Procedure Nichicon Corp. Panasonic AVX Corp. Sprague/Vishay FIGURE 10. Capacitor Manufacturers Phone Numbers 3 Amp Diodes Surface Mount VR Ultra Fast Schottky Recovery All of 20V SK32 these diodes 30WQ03 are rated 30V SK33 to ...
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Block Diagram Application Information PIN FUNCTIONS +V (Pin 1) — This is the positive input supply for the IC IN switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply ...
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Application Information the narrow pulses and ramp controlled manner. This is a very useful feature in some switcher topologies that require large startup currents (such as the inverting configu- ration) which can load down the input power ...
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Application Information DELAY CAPACITOR C — Provides delay for the error flag output. See the DELAY upper curve in Figure 13 , and also refer to timing diagrams in Figure capacitor on this pin provides a time ...
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Application Information FIGURE 16. RMS Current Ratings for Low ESR Electrolytic Capacitors (Typical) FIGURE 17. Capacitor ESR vs Capacitor Voltage Rating (Typical Low ESR Electrolytic Capacitor) The consequences of operating an electrolytic capacitor above the RMS current rating is a ...
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Application Information teristic may cause instability or EMI problems. Ultra-fast recovery diodes typically have reverse recovery times less. Rectifiers such as the IN5400 series are much too slow and should not be used. FIGURE 18. Capacitor ...
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Application Information DISCONTINUOUS MODE OPERATION The selection guide chooses inductor values suitable for continuous mode operation, but for low current applications and/or high input voltages, a discontinuous mode design may be a better choice. It would use an inductor that ...
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Application Information determining a number of other circuit parameters. Param- eters such as, peak inductor or peak switch current, mini- mum load current before the circuit becomes discontinuous, output ripple voltage and output capacitor ESR can all be calculated from ...
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Application Information but with copper areas greater than approximately 6 in small improvements in heat dissipation are realized. If fur- ther thermal improvements are needed, double sided, mul- tilayer pc-board with large copper areas and/or airflow are recommended. The curves ...
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Application Information FIGURE 24. Output Voltage, Input Current, at Start-Up, WITH Soft-start FIGURE 26. Typical Circuit Using Shutdown /Soft-start and Error Flag Features www.national.com (Continued) FIGURE 25. Output Voltage, Input Current, at Start-Up, WITHOUT Soft-start DS012582-40 This reduction in start ...
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Application Information FIGURE 27. Inverting −5V Regulator With Shutdown and Soft-start lNVERTING REGULATOR The circuit in Figure 27 converts a positive input voltage to a negative output voltage with a common ground. The circuit operates by bootstrapping the regulator’s ground ...
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Application Information shown). Figure 29 uses a zener diode to establish the threshold voltage when the switcher begins operating. When the input voltage is less than the zener voltage, resistors R1 and R2 hold the Shutdown /Soft-start pin low, keeping ...
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Application Information TYPICAL THROUGH HOLE PC BOARD LAYOUT, FIXED OUTPUT (1X SIZE), DOUBLE SIDED C : — 470 µF, 50V, Aluminum Electrolytic Panasonic, “HFQ Series” — 330 µF, 35V, Aluminum Electrolytic Panasonic, “HFQ Series” OUT D1: — ...
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Application Information TYPICAL THROUGH HOLE PC BOARD LAYOUT, ADJUSTABLE OUTPUT (1X SIZE), DOUBLE SIDED C : — 470 µF, 50V, Aluminum Electrolytic Panasonic, “HFQ Series” — 220 µF, 35V Aluminum Electrolytic Panasonic, “HFQ Series” OUT D1: — ...
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Physical Dimensions inches (millimeters) unless otherwise noted 7-Lead TO-220 Bent and Staggered Package Order Number LM2599T-3.3, LM2599T-5.0, LM2599T-12 or LM2599T-ADJ NS Package Number TA07B 31 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...