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LM2587T-ADJ
Texas Instruments
IC REG MULT CONFIG ADJ 5A TO220
89232 Pcs New Original In Stock
Boost, Flyback, Forward Converter Switching Regulator IC Positive Adjustable 1.23V 1 Output 5A (Switch) TO-220-5 Formed Leads
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5.0 / 5.0
- (234 Ratings)
LM2587T-ADJ
Product Overview
1293895
DiGi Electronics Part Number
LM2587T-ADJ-DGManufacturer
Texas Instruments
LM2587T-ADJ
Description
IC REG MULT CONFIG ADJ 5A TO220Inventory
89232 Pcs New Original In Stock
Boost, Flyback, Forward Converter Switching Regulator IC Positive Adjustable 1.23V 1 Output 5A (Switch) TO-220-5 Formed Leads
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LM2587T-ADJ Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
SIMPLE SWITCHER®
Product Status
Last Time Buy
Function
Step-Up, Step-Up/Step-Down
Output Configuration
Positive
Topology
Boost, Flyback, Forward Converter
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
4V
Voltage - Input (Max)
40V
Voltage - Output (Min/Fixed)
1.23V
Voltage - Output (Max)
60V
Current - Output
5A (Switch)
Frequency - Switching
100kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Through Hole
Package / Case
TO-220-5 Formed Leads
Supplier Device Package
TO-220-5
Base Product Number
LM2587
Datasheet & Documents
Manufacturer Product Page
LM2587T-ADJ Specifications
HTML Datasheet
LM2587T-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
2156-LM2587T-ADJ
2266-LM2587T-ADJ
TEXTISLM2587T-ADJ
Standard Package
45
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
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SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
항상 제시간에 도착하는 배송과 뛰어난 제품 품질 덕분에 추천하고 싶어요.
de desembre 02, 2025
Commande expédiée rapidement, réception à temps pour mon projet. La robustesse et la longévité des composants dépassent mes attentes.
de desembre 02, 2025
製品の完成度が非常に高く、長く使えることが嬉しいです。対応も真摯でとても満足しています。
de desembre 02, 2025
Their customer support team is proactive and attentive, ensuring all my post-purchase questions were answered promptly.
de desembre 02, 2025
I appreciate their proactive communication and thorough support.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the LM2587T-ADJ in a high-vibration industrial environment, and how can I mitigate them given its through-hole TO-220-5 package?
The LM2587T-ADJ’s through-hole TO-220-5 package, while robust for thermal performance, poses mechanical reliability risks in high-vibration settings due to lead fatigue and solder joint stress. To mitigate this, use strain relief on input/output wiring, secure the PCB with additional mounting points near the regulator, and consider potting the assembly or using conformal coating to dampen mechanical resonance. Avoid routing high-current traces directly to the leads—use pads with thermal relief and reinforce solder joints during assembly.
Can the LM2587T-ADJ safely replace an LM2577T-ADJ in a 12V-to-24V boost converter design without major circuit changes?
While both the LM2587T-ADJ and LM2577T-ADJ are adjustable boost converters from TI’s SIMPLE SWITCHER® family, direct replacement isn’t always safe. The LM2587T-ADJ supports higher switch current (5A vs. 3A) and operates at 100kHz (vs. 52kHz), which affects inductor selection and output ripple. You must recalculate the inductor value (typically smaller for LM2587T-ADJ), verify diode and capacitor ratings, and ensure the feedback network is compatible. Also, the LM2587T-ADJ has a lower minimum on-time, enabling higher step-up ratios—but this increases switching losses. Always revalidate efficiency and thermal performance under load.
How does the lack of synchronous rectification in the LM2587T-ADJ impact efficiency in low-output-voltage, high-current applications like 3.3V@4A from a 5V input?
In low-output-voltage, high-current scenarios such as 3.3V@4A from 5V, the LM2587T-ADJ’s non-synchronous design introduces significant conduction losses through the external catch diode, reducing efficiency by 8–12% compared to synchronous alternatives like the TPS54360. The forward voltage drop of the Schottky diode (typically 0.5V) becomes a larger percentage of the output voltage, increasing power dissipation. To compensate, use a low-Vf ultra-fast or Schottky diode (e.g., MBR545WT1G) and ensure adequate heatsinking. For higher efficiency demands, consider migrating to a synchronous buck-boost topology instead.
Given that the LM2587T-ADJ is in Last Time Buy status, what long-term sourcing and redesign risks should I evaluate before finalizing a new product design?
Designing in the LM2587T-ADJ under Last Time Buy status introduces critical long-term risks: limited future availability, potential price volatility, and no guaranteed second-source support. Even though substitutes like LM2587T-ADJ/NOPB exist, they may not be pin-compatible across all distributors. Before committing, secure a multi-year supply agreement with TI or authorized distributors, or begin evaluating drop-in alternatives such as the MC33063A (with external switch) or modern integrated solutions like the LT8330. Document a migration path early and validate it in prototype to avoid costly redesigns post-launch.
What layout considerations are critical when using the LM2587T-ADJ in a flyback configuration to avoid instability and EMI issues, especially with long feedback traces?
In flyback mode, the LM2587T-ADJ is sensitive to parasitic inductance and noise due to high di/dt switching loops. Keep the input capacitor, switch node (pin 4), and transformer primary as close as possible to minimize loop area. Route the feedback trace away from the switch node and inductor, and use a ground plane underneath but with a slit under the high-frequency switching path to prevent capacitive coupling. Add a small RC snubber across the transformer primary if ringing exceeds 20% of Vout. Always place the feedback divider resistors near the FB pin and use a 1–10nF bypass capacitor directly at the FB pin to suppress high-frequency noise that could cause oscillation.
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.
LM2587T-ADJ CAD Models
Texas Instruments LM2587T-ADJ PCB symbols & footprints
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