LM2575-15 MOTOROLA [Motorola, Inc], LM2575-15 Datasheet
LM2575-15
Related parts for LM2575-15
LM2575-15 Summary of contents
Page 1
... Since the LM2575 converter is a switch–mode power supply, its efficiency is significantly higher in comparison with popular three–terminal linear regulators, especially with higher input voltages. In many cases, the power dissipated by the LM2575 regulator is so low, that no heatsink is required or its size could be reduced dramatically. The LM2575 features include a guaranteed 4% tolerance on output voltage within specified input voltages and output load conditions, and 10% on the oscillator frequency ( 2% over 125 C) ...
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... Thermal Resistance, Junction–to–Case Storage Temperature Range Minimum ESD Rating (Human Body Model 100 pF 1 Lead Temperature (Soldering Maximum Junction Temperature NOTE: ESD data available upon request. 2 LM2575 Feedback LM2575 330 H Output out 3 Gnd 5 ON/OFF 1N5819 330 F 3 ...
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... NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2575 is used as shown in the Figure 14 test circuit, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the LM2575: ...
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... Feedback (Pin 4) removed from output and connected Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and 15 V versions, to force the output transistor “off” LM2575 Symbol Min Typ I b – ...
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... C 0.5 0.4 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 SWITCH CURRENT (A) Figure 6. Dropout Voltage 2.0 1.8 I Load = 1.0 A 1.6 1.4 1.2 1.0 I Load = 200 mA 0.8 0.6 0.4 –50 – JUNCTION TEMPERATURE ( C) MOTOROLA ANALOG IC DEVICE DATA LM2575 (Circuit of Figure 14) 1.0 I Load = 200 0.8 0.6 0.4 0.2 0 –0.2 75 100 125 0 5.0 3.0 2.5 2.0 1.5 1.0 0.5 0 0.8 0.9 1.0 –50 – out = ind = 0 ...
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... Figure 12. Switching Waveforms 10 V OUTPUT VOLTAGE 0 (PIN 2) 1.0 A OUTPUT CURRENT (PIN 2) 0 1.0 A INDUCTOR CURRENT 0 OUTPUT /DIV RIPPLE VOLTAGE 5.0 s/DIV 6 LM2575 Figure 9. Standby Quiescent Current 120 ON/OFF = 5.0 V 100 –50 –25 Figure 11. Feedback Pin Current 40 Adjustable Version Only 20 0 – ...
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... Where V ref = 1. between 1.0 k and 5.0 k PCB LAYOUT GUIDELINES On the other hand, the PCB area connected to the Pin 2 (emitter of the internal switch) of the LM2575 should be kept to a minimum in order to minimize coupling to sensitive circuitry. Another sensitive part of the circuit is the feedback important to keep the sensitive feedback wiring short. To ...
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... R2, R1 and applied to the non–inverting input of the internal error amplifier. In the Adjustable version of the LM2575 switching regulator this pin is the direct input of the error amplifier and the resistor network R2 connected externally to allow programming of the output voltage. ...
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... For a robust design the diode should have a current rating equal to the maximum current limit of the LM2575 to be able to withstand a continuous output short B. The reverse voltage rating of the diode should be at least 1.25 times the maximum input voltage. ...
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... For a robust design, the diode should have a current rating equal to the maximum current limit of the LM2575 to be able to withstand a continuous output short. B. The reverse voltage rating of the diode should be at least 1.25 times the maximum input voltage. ...
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... Components” section of this data sheet. 5. Output Capacitor Selection (C out ) A. Since the LM2575 is a forward–mode switching regulator with voltage mode control, its open loop 2–pole–2–zero frequency characteristic has the dominant pole–pair determined by the output capacitor and inductor values. ...
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... L220 17 0.7 0.8 0.9 1.0 0.2 Figure 21. LM2575–Adj H2200 H1500 H1000 H680 H470 L680 L470 L330 L220 L150 0.3 0.4 0.5 0.6 0.7 0 MAXIMUM LOAD CURRENT (A) Figure 18. LM2575–5.0 L680 L470 L330 L220 L150 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 MAXIMUM LOAD CURRENT (A) Figure 20. LM2575–15 H1500 H1000 H680 H470 L680 L470 L330 L220 0.3 ...
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... NOTE: Table 1 and Table 2 of this Indicator Selection Guide shows some examples of different manufacturer products suitable for design with the LM2575. MOTOROLA ANALOG IC DEVICE DATA LM2575 Table 1. Inductor Selection Guide Pulse Eng Renco PE–92108 RL2444 PE– ...
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... MBRD340 10BQ040 11DQ04 30WQ04 10MQ040 50 V MBRS150 MBR150 MBRD350 10BQ050 SR105 11DQ05 30WQ05 14 LM2575 Phone + 1–619–674–8100 Fax + 1–619–674–8262 Phone + 353 93 24 107 Fax + 353 93 24 459 Phone + 1–516–645–5828 Fax + 1–516–586–5562 Phone + 1–813–347–2181 ...
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... EMI troubles. A fast–recovery diode with soft recovery characteristics can better fulfill a quality, low noise design requirements. Table 4 provides a list of suitable diodes for the LM2575 regulator. Standard 50/60 Hz rectifier diodes such as the 1N4001 series or 1N5400 series are NOT suitable. ...
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... To simplify the inductor selection process, an inductor selection guide for the LM2575 regulator was added to this data sheet (Figures 17 through 21). This guide assumes that the regulator is operating in the continuous mode, and selects an inductor that will allow a peak–to–peak inductor ripple current certain percentage of the maximum design load current ...
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... Output Voltage Ripple and Transients Source of the Output Ripple Since the LM2575 is a switch mode power supply regulator, its output voltage, if left unfiltered, will contain a sawtooth ripple voltage at the switching frequency. The output ripple voltage value ranges from 0. the output voltage caused mainly by the inductor sawtooth ripple current multiplied by the ESR of the output capacitor ...
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... By grounding the feedback pin, the regulator senses the inverted output voltage and regulates it. In this example the LM2575–12 is used to generate a –12 V output. The maximum input voltage in this case 18 LM2575 ...
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... LM2575– 100 F Q1 2N3906 5 ON/OFF 3 Gnd –V out C out 4 1000 F /16 V Feedback LM2575–12 D1 Output 2 1N5817 3 Gnd 5 ON/OFF Regulated Output V out = –12 V Load Current from L1 200 mA for –5 500 mA for –7.0 V 150 H 19 ...
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... LM2575–5 100 F 5 ON/OFF 3 Gnd 2N3904 Buck–Boost Converter +V in LM2575–5 100 F 5 ON/OFF 3 Gnd 2N3904 V out = –5.0 V This picture does not show the complete circuit. MOTOROLA ANALOG IC DEVICE DATA ...
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... Gnd 5 ON/OFF C in 100 F /50 V Figure 34 PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length MOTOROLA ANALOG IC DEVICE DATA LM2575 Feedback 4 L1 150 H Output out D1 2200 F 1N5819 R1 1 D(max) for Free Air ...
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... THE LM2575–5.0 STEP–DOWN VOLTAGE REGULATOR WITH 5 1.0 A OUTPUT POWER CAPABILITY. TYPICAL APPLICATION WITH THROUGH–HOLE PC BOARD LAYOUT Figure 35. Schematic Diagram of the LM2575–5.0 Step–Down Converter +V in Unregulated DC Input + +7 + 100 F /50 V Gnd in C1 – 100 Aluminium Electrolytic C2 – ...
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... THE LM2575–ADJ STEP–DOWN VOLTAGE REGULATOR WITH 8 1.0 A OUTPUT POWER CAPABILITY. TYPICAL APPLICATION WITH THROUGH–HOLE PC BOARD LAYOUT Figure 38. Schematic Diagram of the 8 1.0 V Step–Down Converter Using the LM2575–Adj (An additional LC filter is included to achieve low output ripple voltage) 4 Feedback Unregulated ...
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... –P– 0.10 (0.254 LM2575 OUTLINE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 314D–03 ISSUE D SEATING –T– NOTES: PLANE 1. DIMENSIONING AND TOLERANCING PER ANSI C 2. CONTROLLING DIMENSION: INCH DIMENSION D DOES NOT INCLUDE SUFFIX PLASTIC PACKAGE CASE 314B– ...
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... OPTIONAL A CHAMFER 0.010 (0.254 MOTOROLA ANALOG IC DEVICE DATA LM2575 OUTLINE DIMENSIONS D2T SUFFIX PLASTIC PACKAGE CASE 936A– PAK) ISSUE A –T– TERMINAL NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14 ...
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... LM2575 NOTES MOTOROLA ANALOG IC DEVICE DATA ...
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... MOTOROLA ANALOG IC DEVICE DATA LM2575 NOTES 27 ...
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... Motorola, Inc. Motorola, Inc Equal Mfax is a trademark of Motorola, Inc. JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1, Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, MOTOROLA ANALOG IC DEVICE DATA LM2575/D ...