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LM2575HVT-ADJ
Texas Instruments
IC REG BUCK ADJ 1A TO220-5
1825 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.23V 1 Output 1A TO-220-5
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5.0 / 5.0
- (114 Ratings)
LM2575HVT-ADJ
Product Overview
1330044
DiGi Electronics Part Number
LM2575HVT-ADJ-DGManufacturer
Texas Instruments
LM2575HVT-ADJ
Description
IC REG BUCK ADJ 1A TO220-5Inventory
1825 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 1.23V 1 Output 1A TO-220-5
Quantity
Minimum 1
Minimum 1
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LM2575HVT-ADJ Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Tube
Series
SIMPLE SWITCHER®
Product Status
Last Time Buy
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
1A
Frequency - Switching
52kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Through Hole
Package / Case
TO-220-5
Supplier Device Package
TO-220-5
Base Product Number
LM2575
Datasheet & Documents
Manufacturer Product Page
LM2575HVT-ADJ Specifications
HTML Datasheet
LM2575HVT-ADJ-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
TEXTISLM2575HVT-ADJ
2156-LM2575HVT-ADJ
Standard Package
45
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Je recommande vivement pour leur rapport qualité-prix et leur rapidité.
de desembre 02, 2025
Their after-sales services reflect a genuine desire to build lasting customer relationships.
de desembre 02, 2025
DiGi delivers value at every price point, and I appreciate their eco-conscious packaging approach.
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Frequently Asked Questions (FAQ)
Can the LM2575HVT-ADJ be safely used as a drop-in replacement for the LM2596HVS-ADJ in a 48V-to-12V industrial power supply design, and what are the key performance trade-offs to consider?
While both the LM2575HVT-ADJ and LM2596HVS-ADJ are adjustable buck regulators with similar input voltage ranges (up to 60V), they are not direct drop-in replacements due to critical differences. The LM2575HVT-ADJ operates at 52kHz, resulting in larger external inductors and slower transient response compared to the LM2596HVS-ADJ’s 150kHz switching frequency. Additionally, the LM2575HVT-ADJ has a higher dropout voltage and lower efficiency at light loads. If board space and transient performance are critical, redesigning the output filter and thermal management is necessary. Always verify stability with your specific load profile and consider the LM2575HVT-ADJ’s lower switching frequency when selecting input/output capacitors and inductor saturation current.
What are the risks of using the LM2575HVT-ADJ in high-vibration automotive environments, and how can mechanical and thermal reliability be ensured given its TO-220-5 package?
The LM2575HVT-ADJ’s TO-220-5 through-hole package is more susceptible to mechanical stress in high-vibration environments like automotive under-hood applications compared to surface-mount alternatives. Solder joints may fatigue over time, especially if the PCB lacks proper strain relief or mounting support. To mitigate risk, use a heatsink with secure mechanical attachment (e.g., screw-mounted with thermal interface material), reinforce the PCB with additional solder fillets, and consider conformal coating to prevent microcracking. Ensure the operating junction temperature stays below 125°C under worst-case ambient conditions—use conservative derating and validate thermal performance with infrared imaging during prototyping.
How should I design the feedback network for the LM2575HVT-ADJ when targeting a precise 3.3V output, and what layout practices minimize noise-induced output instability?
To achieve a stable 3.3V output with the LM2575HVT-ADJ, use precision resistors (1% tolerance or better) in the feedback divider, with the upper resistor connected from Vout to the FB pin and the lower from FB to ground. Calculate values using the 1.23V reference: R1 = (3.3V / 1.23V – 1) × R2. Choose R2 in the 1kΩ–10kΩ range to balance noise immunity and bias current error. Critically, route the feedback trace away from high-di/dt switching nodes (inductor, diode, input cap) and keep it short. Place the feedback resistors close to the FB pin and use a ground plane beneath but avoid routing switching currents under the feedback path to prevent coupling noise that could cause output oscillation or ripple increase.
Is it safe to parallel two LM2575HVT-ADJ devices to increase output current beyond 1A, and what are the failure modes if attempted without current sharing circuitry?
Paralleling LM2575HVT-ADJ devices without active current-sharing circuitry is not recommended and poses significant reliability risks. Due to manufacturing tolerances in internal reference voltages and feedback thresholds, one device will likely carry more current than the other, leading to thermal runaway and premature failure. Even minor differences in output voltage setpoints can cause one regulator to source most of the load current, exceeding its 1A limit. If higher current is needed, consider upgrading to a higher-power SIMPLE SWITCHER like the LM2596HVS-12 (3A) or using a dedicated current-sharing controller. Alternatively, implement external ballast resistors or MOSFET-based current balancing—but this adds complexity and reduces efficiency, making a single higher-current IC a more robust solution.
Given that the LM2575HVT-ADJ is in Last Time Buy status, what long-term sourcing and design continuity strategies should I adopt for existing products still in production?
With the LM2575HVT-ADJ marked as Last Time Buy, immediate action is required to avoid future supply disruptions. First, secure sufficient inventory based on your product’s lifecycle demand, factoring in lead times and potential allocation risks. Second, initiate a last-time redesign using a modern, pin-compatible or functionally equivalent alternative such as the LM2596HVS-ADJ (3A, higher frequency) or the newer TPS54360 (60V, 3.5A, integrated FET). Perform full validation including thermal, efficiency, and EMI testing under worst-case conditions. Update your BOM and PCB layout early, and consider dual-sourcing with a drop-in replacement like the LM2575HVT-ADJ/NOPB if available. Document the transition plan and communicate with procurement to ensure continuity—delaying this process risks costly line stoppages.
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.
LM2575HVT-ADJ CAD Models
Texas Instruments LM2575HVT-ADJ PCB symbols & footprints
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