LM2597M-5.0/NOPB National Semiconductor, LM2597M-5.0/NOPB Datasheet
LM2597M-5.0/NOPB
Specifications of LM2597M-5.0/NOPB
*LM2597M-5.0/NOPB
LM2597M-5.0
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LM2597M-5.0/NOPB Summary of contents
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... Patent Number 5,382,918. SIMPLE SWITCHER ® and Switchers Made Simple ® are registered trademarks of National Semiconductor Corporation. © 2001 National Semiconductor Corporation Power Converter 150 kHz 0.5A ® The LM2597HV is for use in applications requiring and input voltage up to 60V. Features n 3 ...
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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 ( LM2597 LM2597HV SD /SS Pin Input Voltage (Note 2) Delay Pin Voltage (Note 2) Flag Pin Voltage Bias Supply Voltage ( Feedback Pin Voltage ...
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LM2597/LM2597HV-12 Electrical Characteristics Specifications with standard type face are for T ture Range.V =40V for the LM2597 and 60V for the LM2597HV INmax Symbol Parameter SYSTEM PARAMETERS (Note 6) Test Circuit Figure 12 V Output Voltage 15V OUT Efficiency V ...
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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 100 mA. LOAD Symbol Parameter DEVICE PARAMETERS Current I Standby Quiescent STBY Current Thermal Resistance JA SHUTDOWN/SOFT-START ...
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All Output Voltage Versions Electrical Characteristics Note 5: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via ...
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Typical Performance Characteristics Quiescent Current DS012440-8 Feedback Pin Bias Current DS012440-11 Soft-start DS012440-14 www.national.com (Continued) Standby Quiescent Current DS012440-9 Flag Saturation Voltage DS012440-12 Shutdown /Soft-start Current DS012440-15 6 Minimum Operating Supply Voltage DS012440-10 Switching Frequency DS012440-13 Delay Pin Current DS012440-16 ...
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Typical Performance Characteristics V and V Current and Temperature BS DS012440-17 Continuous Mode Switching Waveforms V = 20V 5V 400 mA IN OUT LOAD L = 100 µ 120 µF, ...
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... Connection Diagrams and Ordering Information 8–Lead DIP (N) Top View Order Number LM2597N-3.3, LM2597N-5.0, LM2597N-12 or LM2597N-ADJ LM2597HVN-3.3, LM2597HVN-5.0, LM2597HVN-12 or LM2597HVN-ADJ See NS Package Number N08E www.national.com 8–Lead Surface Mount (M) DS012440-23 Order Number LM2597M-3.3, LM2597M-5.0, LM2597M-12 or LM2597HVM-3.3, LM2597HVM-5.0, LM2597HVM-12 or LM2597HVM-ADJ See NS Package Number M08A 8 DS012440-24 Top View LM2597M-ADJ ...
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LM2597/LM2597HV 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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LM2597/LM2597HV Series Buck Regulator Design Procedure (Fixed Output) (Continued) 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 ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure (Fixed Output) (Continued) Conditions Output Load Max Input Voltage Current Voltage (V) (A) (V) 3 ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure (Adjustable Output) PROCEDURE (Adjustable Output Voltage Version) Given Regulated Output Voltage OUT V (max) = Maximum Input Voltage IN I (max) = Maximum Load Current LOAD F = Switching Frequency (Fixed at ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure (Adjustable Output) (Continued) PROCEDURE (Adjustable Output Voltage Version) 3. Output Capacitor Selection (C ) OUT A. In the majority of applications, low ESR electrolytic or solid tantalum capacitors between 82 µF and 220 µF ...
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LM2597/LM2597HV 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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LM2597/LM2597HV Series Buck Regulator Design Procedure (Adjustable Output) (Continued) Output Through Hole Output Capacitor Voltage Panasonic Nichicon PL (V) HFQ Series Series (µF/V) 1.2 220/25 220/25 4 180/25 180/25 6 82/25 9 82/ 82/ 82/25 2 ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure INDUCTOR VALUE SELECTION GUIDES (For Continuous Mode Operation) FIGURE 3. LM2597/LM2597HV-3.3 FIGURE 5. LM2597/LM2597HV-12 www.national.com DS012440-57 FIGURE 4. LM2597/LM2597HV-5.0 DS012440-58 FIGURE 6. LM2597/LM2597HV-ADJ 16 DS012440-30 DS012440-32 ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure Induc- Cur- Schott tance rent Through (µH) (A) Hole L1 220 0.18 67143910 L2 150 0.21 67143920 L3 100 0.26 67143930 L4 68 0.32 67143940 L5 47 0.37 67148310 L6 33 0.44 67148320 L7 ...
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LM2597/LM2597HV Series Buck Regulator Design Procedure VR Surface Mount Schottky 20V All of these diodes are rated to MBRS130 30V MBRS140 40V 10BQ040 10MQ040 50V MBRS160 or 10BQ050 more 10MQ060 MBRS1100 10MQ090 SGL41-60 SS16 Block Diagram www.national.com 1A Diodes Ultra ...
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Typical Circuit and Layout Guidelines Component Values shown are for V = 15V OUT C — 47 µF, 50V, Aluminum Electrolytic Nichicon “PL Series” — 120 µF, 25V Aluminum Electrolytic, Nichicon “PL Series” OUT D1 — ...
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Typical Circuit and Layout Guidelines (Continued any switching regulator, layout is very important. Rap- idly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated ...
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Application Information (Continued) FIGURE 13. Soft-start, Delay, Error, Output 21 DS012440-33 www.national.com ...
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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 current rating rather than its capacitance or voltage ratings, although the capacitance value and voltage rating are di- rectly related to the RMS current rating. The RMS current rating of a capacitor could be viewed as a capacitor’s ...
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Application Information quick design component selection tables in Figure 1 and Figure 2 for typical capacitor values, voltage ratings, and manufacturers capacitor types. Electrolytic capacitors are not recommended for tempera- tures below −25˚C. The ESR rises dramatically at cold tem- ...
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Application Information The inductor manufacturers data sheets include current and energy limits to avoid inductor saturation. 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 ...
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Application Information less how large the inductor value is) will be forced to run discontinuous if the output is lightly loaded. This is a per- fectly acceptable mode of operation switching regulator design, knowing the value of the ...
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Application Information Circuit Data for Temperature Rise Curve (DIP-8) Capacitors Through hole electrolytic Inductor Through hole, Schott, 100 µH Diode Through hole, 1A 40V, Schottky PC board 4 square inches single sided 2 oz. copper (0.0028") FIGURE 22. Junction Temperature ...
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Application Information To use the bias supply feature with output voltages between 4V and 15V, wire the bias pin to the regulated output. Since the V pin requires a minimum operate, the 3.3V BS part cannot be ...
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Application Information FIGURE 28. Typical Circuit Using Shutdown /Soft-start and Error Flag Features FIGURE 29. Inverting −5V Regulator With Shutdown and Soft-start lNVERTING REGULATOR The circuit in Figure 29 converts a positive input voltage to a negative output voltage with ...
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Application Information FIGURE 30. Maximum Load Current for Inverting Regulator Circuit An additional diode is required in this regulator configuration. Diode D1 is used to isolate input voltage ripple or noise from coupling through the C capacitor to the output, ...
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Application Information eral hundred mA on the regulated positive output for the charge pump to work correctly. Also, resistor R1 is required to limit the charging current some value less than the LM2597 current limit (typically 800 ...
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Application Information TYPICAL SURFACE MOUNT PC BOARD LAYOUT, FIXED OUTPUT (2X size) C — 10 µF, 35V, Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size — 100 µF, 10V Solid Tantalum, AVX, “TPS Series” (surface mount, “D” ...
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... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, Order Number LM2597M-3.3, LM2597M-5.0, LM2597M-12 or LM2597M-ADJ LM2597HVM-3.3, LM2597HVM-5.0, LM2597HVM-12 or LM2597HVM-ADJ NS Package Number M08A 33 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 ...