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LM2576HVSX-ADJ/NOPB
Texas Instruments
IC REG BUCK ADJ 3A DDPAK
17272 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.23V 1 Output 3A TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
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5.0 / 5.0
- (34 Ratings)
LM2576HVSX-ADJ/NOPB
Product Overview
1369569
DiGi Electronics Part Number
LM2576HVSX-ADJ/NOPB-DGManufacturer
Texas Instruments
LM2576HVSX-ADJ/NOPB
Description
IC REG BUCK ADJ 3A DDPAKInventory
17272 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.23V 1 Output 3A TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Quantity
Minimum 1
Minimum 1
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LM2576HVSX-ADJ/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
SIMPLE SWITCHER®
Product Status
Active
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
4V
Voltage - Input (Max)
60V
Voltage - Output (Min/Fixed)
1.23V
Voltage - Output (Max)
57V
Current - Output
3A
Frequency - Switching
52kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package
TO-263 (DDPAK-5)
Base Product Number
LM2576
Datasheet & Documents
Manufacturer Product Page
LM2576HVSX-ADJ/NOPB Specifications
HTML Datasheet
LM2576HVSX-ADJ/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM2576HVSX-ADJ/NOPBCT
*LM2576HVSX-ADJ/NOPB
LM2576HVSX-ADJ/NOPBTR
LM2576HVSX-ADJ/NOPBDKR
NATNSCLM2576HVSX-ADJ/NOPB
LM2576HVSX-ADJ-NDR
2156-LM2576HVSX-ADJ/NOPB-TI
LM2576HVSXADJNOPB
Standard Package
500
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
디지의 배송 서비스는 믿을 수 있고, 포장도 훌륭합니다. 아주 만족스럽네요.
de desembre 02, 2025
他們的發貨速度非常快，從下單到收到貨只用了很短的時間。
de desembre 02, 2025
La gestion de la livraison est fluide et fiable, ce qui facilite grandement mes opérations.
de desembre 02, 2025
La livraison a été très rapide, ce qui m’a permis de commencer aussitôt. La résistance des produits est excellente, ils tiennent bien dans le temps.
de desembre 02, 2025
Their eco-friendly packaging makes a positive difference.
de desembre 02, 2025
The support team is always professional and friendly.
de desembre 02, 2025
Their products help ensure the success of my projects due to their reliability.
de desembre 02, 2025
DiGi Electronics offers exceptional after-sales support that always exceeds expectations.
de desembre 02, 2025
The staff at DiGi Electronics are extremely friendly and helpful.
de desembre 02, 2025
The after-sales team at DiGi Electronics is highly professional and helpful.
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Frequently Asked Questions (FAQ)
When designing a high-voltage 60V input system with the LM2576HVSX-ADJ/NOPB, what are the critical external component selection considerations beyond just current and voltage ratings to ensure stable and reliable 3A output, especially concerning input ripple current and loop stability?
For stable 3A output with the LM2576HVSX-ADJ/NOPB from a 60V input, prioritize low Equivalent Series Resistance (ESR) for the input and output capacitors to minimize ripple. Select an inductor with a saturation current rating significantly higher than the expected peak inductor current (typically 30-40% above the 3A continuous output current) to prevent magnetic saturation under transient load conditions. For loop stability, ensure the compensation network (if implemented externally or by the inherent internal compensation) is correctly designed for the chosen inductor and capacitor values, paying close attention to the switching frequency of 52kHz and potential phase margin issues at higher load currents or input voltages. A thorough transient analysis is recommended to verify performance under worst-case scenarios.
What potential failure modes or operational risks should be evaluated when replacing an older LM2576S-ADJ/NOPB with the LM2576HVSX-ADJ/NOPB in an existing design, especially if the original design was pushing input voltage limits or experienced thermal issues?
When substituting an LM2576S-ADJ/NOPB with the LM2576HVSX-ADJ/NOPB, a key risk is overlooking the higher input voltage capability (up to 60V for the HVSX version). While beneficial, this can mask potential issues in the surrounding components if the original design was not adequately robust for extended operation near the LM2576S's 40V limit. Ensure the input capacitance and snubbers are rated for the full 60V if the system allows for it, and re-evaluate thermal performance. The LM2576HVSX-ADJ/NOPB in the TO-263 package may have slightly different thermal impedance than older variants, so a thermal simulation or test is prudent, especially if the original design was already operating at elevated temperatures.
In a power-critical automotive application where the LM2576HVSX-ADJ/NOPB is used to regulate a battery voltage that can fluctuate significantly, how can designers mitigate EMI concerns and ensure compliance given the non-synchronous nature of this buck regulator?
To mitigate EMI with the LM2576HVSX-ADJ/NOPB in automotive applications, focus on minimizing parasitic inductance in the high-current switching loops (input capacitor, output capacitor, and the device itself). Using a small, low-ESR ceramic capacitor very close to the LM2576HVSX-ADJ/NOPB's input pins is crucial. Consider adding a small input filter (ferrite bead and a capacitor) and a post-regulator filter (e.g., a small inductor and capacitor) on the output to attenuate switching noise. Careful PCB layout, including a solid ground plane and short, wide traces for switching nodes, is paramount. While the LM2576HVSX-ADJ/NOPB is non-synchronous, optimizing the choice of freewheeling diode (fast recovery, low Vf) can also help reduce switching noise.
What are the implications of the LM2576HVSX-ADJ/NOPB's 52kHz switching frequency on component selection and system performance when operating at the upper end of its 60V input and 3A output capability, specifically regarding inductor saturation and thermal management?
Operating the LM2576HVSX-ADJ/NOPB at its maximum input voltage (60V) and output current (3A) with its inherent 52kHz switching frequency requires careful component selection to avoid saturation and overheating. The inductor's DC current rating must be significantly above 3A to account for ripple current and peak currents during transients. Inductors with higher saturation current ratings at lower frequencies will generally have a higher core loss at 52kHz, contributing to overall system inefficiency and heat. Consequently, a larger inductor might be needed to maintain a safe saturation margin, which can affect PCB space. Thermal management is critical: ensure the TO-263 package has adequate copper area on the PCB for heat dissipation, and consider an external heatsink if necessary, as operating near the device's limits will increase junction temperature, impacting reliability.
For applications requiring a fixed 5V output using the adjustable LM2576HVSX-ADJ/NOPB, what are the hidden risks or overlooked design considerations when setting the feedback resistor divider, beyond the basic formula, especially concerning transient response and load regulation under varying input voltages?
When setting a fixed 5V output with the adjustable LM2576HVSX-ADJ/NOPB using a resistor divider, the primary overlooked risk is the impact of resistor tolerance and drift on the actual output voltage under varying load conditions. Use high-precision resistors (e.g., 1% or better) for the feedback divider. The choice of resistor values also impacts the quiescent current drawn by the feedback network. Crucially, the values must be chosen to maintain adequate loop stability and transient response. Higher feedback resistor values can sometimes lead to slower transient response due to increased impedance in the feedback path. Ensure the feedback node is kept as short and noise-free as possible. For critical applications, consider the input voltage range's effect on the LM2576HVSX-ADJ/NOPB's duty cycle and how that might influence load regulation and transient recovery speed.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM2576HVSX-ADJ/NOPB CAD Models
Texas Instruments LM2576HVSX-ADJ/NOPB PCB symbols & footprints
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