LM2576T-5 ON Semiconductor, LM2576T-5 Datasheet
LM2576T-5
Available stocks
Related parts for LM2576T-5
LM2576T-5 Summary of contents
Page 1
... DEVICE MARKING INFORMATION See general marking information in the device marking section on page 24 of this data sheet. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. 1 TO−220 TV SUFFIX CASE 314B TO− ...
Page 2
Typical Application (Fixed Output Voltage Versions) 7.0 V − Unregulated DC Input 100 mF Representative Block Diagram and Typical Application +V in Unregulated DC Input Feedback R2 Fixed Gain Error Amplifier R1 1.0 k ...
Page 3
OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.) Rating Operating Junction Temperature Range Supply Voltage SYSTEM ...
Page 4
DEVICE PARAMETERS ELECTRICAL CHARACTERISTICS for the 12 V version, and for the 15 V version operating junction temperature range that applies [Note 2], unless otherwise noted.) Characteristics ALL OUTPUT VOLTAGE VERSIONS Feedback Bias Current ...
Page 5
TYPICAL PERFORMANCE CHARACTERISTICS 1 0 500 mA Load 0.6 Normalized 0.4 0.2 0 −0.2 −0.4 −0.6 −0.8 −1.0 −50 − JUNCTION TEMPERATURE ...
Page 6
TYPICAL PERFORMANCE CHARACTERISTICS 200 180 160 140 J 120 100 INPUT VOLTAGE (V) in Figure 8. Standby Quiescent Current 8.0 6 ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS ms/DIV Figure 13. Switching Waveforms Vout = Output Pin Voltage, 10 V/DIV B: Inductor Current, 2.0 ...
Page 8
V − Unregulated 100 mF DC Input 7.0 V − Unregulated 100 mF DC Input As in any switching regulator, the layout of the printed circuit board is very ...
Page 9
PIN FUNCTION DESCRIPTION Pin Symbol 1 V This pin is the positive input supply for the LM2576 step−down switching regulator. In order to minimize voltage in transients and to supply the switching currents needed by the regulator, a suitable input ...
Page 10
Procedure (Fixed Output Voltage Version) In order to simplify the switching regulator design, a step−by−step design procedure and some examples are provided. Procedure Given Parameters Regulated Output Voltage (3 out ...
Page 11
Procedure (Fixed Output Voltage Version) (continued)In order to simplify the switching regulator design, a step−by−step design procedure and some examples are provided. Procedure 5. Output Capacitor Selection (C ) out A. Since the LM2576 is a forward−mode switching regulator with ...
Page 12
Procedure (Adjustable Output Version: LM2576−ADJ) (continued) Procedure 4. Inductor Selection (L1) A. Use the following formula to calculate the inductor Volt x microsecond [V x ms] constant: V out – V out in ...
Page 13
LM2576 Series Buck Regulator Design Procedures Indicator Value Selection Guide (For Continuous Mode Operation) 60 L680 40 L470 20 15 L330 10 L220 8.0 L150 7.0 L100 L68 6.0 5.0 0.3 0.4 0.5 0.6 0.8 1.0 1 MAXIMUM ...
Page 14
... MBRD340 50 V MBR350 SK35 31DQ05 30WQ05 SR305 60 V MBR360 MBRS360T3 DQ06 MBRD360 SR306 NOTE: Diodes listed in bold are available from ON Semiconductor. Table 2. Inductor Selection by Manufacturer’s Part Number Inductor Inductor Code Value 47 mH L47 68 mH L68 100 mH L100 150 mH L150 ...
Page 15
Table 3. Example of Several Inductor Manufacturers Phone/Fax Numbers Pulse Engineering, Inc. Pulse Engineering, Inc. Europe Renco Electronics, Inc. Tech 39 Schott Corporation Input Capacitor ( The Input Capacitor Should Have a Low ESR For stable operation of ...
Page 16
Catch Diode Locate the Catch Diode Close to the LM2576 The LM2576 is a step−down buck converter; it requires a fast diode to provide a return path for the inductor current when the switch turns off. This diode must be ...
Page 17
When multiple switching regulators are located on the same printed circuit board, open core magnetics can cause interference between two or more of the regulator circuits, especially at high currents due to mutual coupling. A toroid, pot core or E−core ...
Page 18
If improvements are needed, double sided or multilayer PC boards with large copper areas should be considered. In order to achieve the best thermal performance highly recommended to ...
Page 19
This circuit configuration is able to deliver approximately 0 the output when the input voltage higher. At lighter loads the minimum input voltage required drops to approximately 4.7 V, because the buck−boost regulator topology ...
Page 20
Shutdown +V Off Input 5 LM2576− 100 mF Q1 2N3906 5 ON/OFF NOTE: This picture does not show the complete circuit. Figure 29. Inverting Buck−Boost Regulator ...
Page 21
100 1N5242B Q1 2N3904 NOTE: This picture does not show the complete circuit. Figure 32. Undervoltage Lockout Circuit for Buck Converter ...
Page 22
THE LM2576−5 STEP−DOWN VOLTAGE REGULATOR WITH 5 3.0 A OUTPUT POWER CAPABILITY. TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT Unregulated DC Input + 100 mF /50 V GND in Figure 35. ...
Page 23
THE LM2576−ADJ STEP−DOWN VOLTAGE REGULATOR WITH 8 1.0 A OUTPUT POWER CAPABILITY. TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT 4 Unregulated +V DC Input in LM2576−ADJ ...
Page 24
... LM2576D2TR4−3.3 LM2576D2TR4−3.3G LM2576TV−5 LM2576T−5 LM2576D2T−5 5.0 V 5.0 V LM2576D2T−5G LM2576D2TR4−5 LM2576TV−12 LM2576TV−12G LM2576T−12 LM2576D2T−12 LM2576D2TR4−12 LM2576TV−15 LM2576T− LM2576D2T−15 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. TO− ...
Page 25
B −P− OPTIONAL Q CHAMFER 0.24 (0.610 0.10 (0.254 −Q− 0.356 (0.014) ...
Page 26
... American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 26 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. ...