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Details, datasheet, quote on part number:LM2576TV-015
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| Part: | LM2576TV-015 |
| Category: | Power Management => DC-DC Converters => DC-DC Switching => Converters |
| Description: | 3A, 15V, 52kHz Buck PWM Switching Regulator, Package: D2PAK, Pins=5 |
| Company: | ON Semiconductor |
| Datasheet: | Download LM2576TV-015 datasheet File size : 273 kB |
| Request For quote: | Find where to buy LM2576TV-015
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Datasheet text preview:
LM2576 3.0 A, 15 V, Step-Down Switching Regulator
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a stepdown switching regulator (buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the LM2576 are offered by several different inductor manufacturers. Since the LM2576 converter is a switchmode power supply, its efficiency is significantly higher in comparison with popular threeterminal linear regulators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switchmode power supplies. The LM2576 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 0°C to 125°C). External shutdown is included, featuring 80 µA (typical) standby current. The output switch includes cyclebycycle current limiting, as well as thermal shutdown for full protection under fault conditions.
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TO220 TV SUFFIX CASE 314B
Heatsink surface connected to Pin 3
TO220 T SUFFIX CASE 314D 1 5 Pin 1. 2. 3. 4. 5. Vin Output Ground Feedback ON/OFF
· 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions · Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% · · · · · · · · · · · · · · ·
Maximum Over Line and Load Conditions Guaranteed 3.0 A Output Current Wide Input Voltage Range Requires Only 4 External Components 52 kHz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection Moisture Sensitivity Level (MSL) Equals 1 Simple HighEfficiency StepDown (Buck) Regulator Efficient PreRegulator for Linear Regulators OnCard Switching Regulators Positive to Negative Converter (BuckBoost) Negative StepUp Converters Power Supply for Battery Chargers
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D2PAK D2T SUFFIX CASE 936A
Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 24 of this data sheet.
Applications
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 24 of this data sheet.
© Semiconductor Components Industries, LLC, 2002
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January, 2002 Rev. 3
Publication Order Number: LM2576/D
LM2576
Typical Application (Fixed Output Voltage Versions)
Feedback 7.0 V - 40 V Unregulated DC Input +Vin Cin 100 µF 1 3 Gnd 5 LM2576 4 Output 2 ON/OFF L1 100 µH D1 1N5822 Cout 1000 µF
5.0 V Regulated Output 3.0 A Load
Representative Block Diagram and Typical Application
+Vin Cin 1 4 Feedback R2 Fixed Gain Error Amplifier Comparator Freq Shift 18 kHz 52 kHz Oscillator Current Limit Driver Latch 1.0 Amp Switch Output 2 Gnd 3 D1 L1 Cout Load ON/OFF 5
Unregulated DC Input
3.1 V Internal Regulator
ON/OFF
Output Voltage Versions 3.3 V 5.0 V 12 V 15 V For adjustable version R1 = open, R2 = 0
R2 () 1.7 k 3.1 k 8.84 k 11.3 k
R1 1.0 k
Regulated Output Vout
1.235 V Band-Gap Reference
Reset
Thermal Shutdown
This device contains 162 active transistors.
Figure 1. Block Diagram and Typical Application
ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)
Rating Maximum Supply Voltage ON/OFF Pin Input Voltage Output Voltage to Ground (SteadyState) Power Dissipation Case 314B and 314D (TO220, 5Lead) Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 936A (D2PAK) Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Storage Temperature Range Minimum ESD Rating (Human Body Model: C = 100 pF, R = 1.5 k) Lead Temperature (Soldering, 10 seconds) Maximum Junction Temperature Symbol Vin PD R J A R J C PD R J A R J C Tstg TJ Value 45 0.3 V V +Vin 1.0 Internally Limited 65 5.0 Internally Limited 70 5.0 65 to +150 2.0 260 150 Unit V V V W °C/W °C/W W °C/W °C/W °C kV °C °C
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LM2576
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 Symbol TJ Vin Value 40 to +125 40 Unit °C V
SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 15)
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for the 12 V version, and Vin = 30 V for the 15 V version. ILoad = 500 mA. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.)
Characteristics LM25763.3 ([Note 1] Test Circuit Figure 15) Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C) Output Voltage (6.0 V Vin 40 V, 0.5 A ILoad 3.0 A) TJ = 25°C TJ = 40 to +125°C Efficiency (Vin = 12 V, ILoad = 3.0 A) LM25765 ([Note 1] Test Circuit Figure 15) Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C) Output Voltage (8.0 V Vin 40 V, 0.5 A ILoad 3.0 A) TJ = 25°C TJ = 40 to +125°C Efficiency (Vin = 12 V, ILoad = 3.0 A) LM257612 ([Note 1] Test Circuit Figure 15) Output Voltage (Vin = 25 V, ILoad = 0.5 A, TJ = 25°C) Output Voltage (15 V Vin 40 V, 0.5 A ILoad 3.0 A) TJ = 25°C TJ = 40 to +125°C Efficiency (Vin = 15 V, ILoad = 3.0 A) LM257615 ([Note 1] Test Circuit Figure 15) Output Voltage (Vin = 30 V, ILoad = 0.5 A, TJ = 25°C) Output Voltage (18 V Vin 40 V, 0.5 A ILoad 3.0 A) TJ = 25°C TJ = 40 to +125°C Efficiency (Vin = 18 V, ILoad = 3.0 A) LM2576 ADJUSTABLE VERSION ([Note 1] Test Circuit Figure 15) Feedback Voltage (Vin = 12 V, ILoad = 0.5 A, Vout = 5.0 V, TJ = 25°C) Feedback Voltage (8.0 V Vin 40 V, 0.5 A ILoad 3.0 A, Vout = 5.0 V) TJ = 25°C TJ = 40 to +125°C Efficiency (Vin = 12 V, ILoad = 3.0 A, Vout = 5.0 V) Vout Vout 1.193 1.18 1.23 77 1.267 1.28 % 1.217 1.23 1.243 V V Vout Vout 14.4 14.25 15 88 15.6 15.75 % 14.7 15 15.3 V V Vout Vout 11.52 11.4 12 88 12.48 12.6 % 11.76 12 12.24 V V Vout Vout 4.8 4.75 5.0 77 5.2 5.25 % 4.9 5.0 5.1 V V Vout Vout 3.168 3.135 3.3 75 3.432 3.465 % 3.234 3.3 3.366 V V Symbol Min Typ Max Unit
1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2576 is used as shown in the Figure 15 test circuit, system performance will be as shown in system parameters section. 2. Tested junction temperature range for the LM2576: Tlow = 40°C Thigh = +125°C
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