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LMS1587CSX-1.5
Texas Instruments
IC REG LIN 1.5V 3A DDPAK/TO263-3
4578 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-3)
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5.0 / 5.0
- (494 Ratings)
LMS1587CSX-1.5
Product Overview
1367178
DiGi Electronics Part Number
LMS1587CSX-1.5-DGManufacturer
Texas Instruments
LMS1587CSX-1.5
Description
IC REG LIN 1.5V 3A DDPAK/TO263-3Inventory
4578 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-3)
Quantity
Minimum 1
Minimum 1
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LMS1587CSX-1.5 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
-
Series
-
Product Status
Obsolete
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
13V
Voltage - Output (Min/Fixed)
1.5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
1.3V @ 3A
Current - Output
3A
Current - Quiescent (Iq)
7 mA
Current - Supply (Max)
13 mA
PSRR
60 ~ 72 dB (120Hz)
Control Features
-
Protection Features
Over Current, Over Temperature
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
Supplier Device Package
TO-263 (DDPAK-3)
Base Product Number
LMS1587
Datasheet & Documents
HTML Datasheet
LMS1587CSX-1.5-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LMS1587CSX-1.5DKR
LMS1587CSX15
LMS1587CSX-1.5TR
LMS1587CSX-1.5CT
Standard Package
500
Alternative Parts
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Their logistics efficiency is remarkable, ensuring quick delivery with environmentally friendly packaging.
de desembre 02, 2025
Their competitive prices, along with durable packaging, provide comprehensive satisfaction.
de desembre 02, 2025
The logistics team handled my delivery efficiently, arriving on time and in perfect condition.
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Frequently Asked Questions (FAQ)
What are the key thermal design considerations when using the LMS1587CSX-1.5 in a high-current application near its 3A output limit?
When operating the LMS1587CSX-1.5 close to its 3A maximum output current, thermal management becomes critical due to power dissipation from the voltage dropout. With a dropout as high as 1.3V at 3A, power loss can reach nearly 3.9W, which requires an appropriate heatsink or PCB copper pour connected to the thermal pad. Use a minimum 1 in² copper area with thermal vias to an internal ground plane to maintain junction temperature below 125°C. Operating above this temperature triggers thermal shutdown, so derate current accordingly in enclosed or high-ambient environments to ensure reliable operation of the LMS1587CSX-1.5.
Can the LMS1587CSX-1.5 be safely replaced with the LT1587CM-1.5#PBF in an existing design, and what layout or performance changes should be expected?
Yes, the LT1587CM-1.5#PBF is a functionally equivalent and pin-compatible alternative to the LMS1587CSX-1.5, but there are key differences. The LT1587 offers lower dropout (typically 1.1V at 3A) and slightly better PSRR, but requires careful review of the thermal footprint since packaging thermal resistance differs slightly. While both use TO-263 (DDPAK-3), ensure the PCB layout provides sufficient copper for thermal dissipation when migrating. Also, confirm bias current paths—LT1587 has marginally lower quiescent current—which may affect light-load efficiency. Given that the LMS1587CSX-1.5 is obsolete, switching to LT1587CM-1.5#PBF improves long-term supply reliability and RoHS compliance.
How does the obsolescence of the LMS1587CSX-1.5 impact long-term production, and what are the recommended drop-in replacements to avoid redesign?
The obsolescence of the LMS1587CSX-1.5 poses a supply chain risk for long-term production; continued use may lead to component shortages and forced redesigns. The recommended replacement is the LMS1587CSX-1.5/NOPB variant, which is functionally identical but RoHS-compliant and may be available in extended supply. If unavailable, the LT1587CM-1.5#TRPBF from Analog Devices (formerly Linear Tech) is a proven pin-to-pin substitute with comparable dropout, current capability, and thermal performance. Always validate transient response and thermal behavior in the final application when migrating from the LMS1587CSX-1.5 to avoid field failures due to subtle dynamic load regulation differences.
What protection mechanisms are built into the LMS1587CSX-1.5, and how do they affect system reliability during fault conditions?
The LMS1587CSX-1.5 integrates over-temperature and over-current protection to enhance system reliability. During over-current events, the device limits output current to prevent damage, but prolonged faults can trigger thermal shutdown due to internal power dissipation. Recovery is automatic once the die cools, but this cycling can disrupt system operation. To improve reliability, ensure input voltage remains within 13V max and use input/output capacitors (typically 10 μF tantalum) to suppress transients. Avoid sustained short-circuit conditions in the application to prevent degradation over time, especially in systems where the LMS1587CSX-1.5 is operating near thermal limits.
Is the LMS1587CSX-1.5 suitable for automotive applications with fluctuating input voltages, and what input filtering is recommended?
The LMS1587CSX-1.5 can be used in automotive environments where input voltage stays below 13V, but caution is needed during cold crank or load dump scenarios that exceed this. Since the LMS1587CSX-1.5 has no reverse-voltage or transient protection, it's vulnerable to voltage spikes. Use an external transient voltage suppressor (TVS) diode on the input and ensure input capacitance is at least 22 μF low-ESR to stabilize line transients. Also verify that dropout voltage (1.3V max at 3A) is acceptable when battery voltage dips—output may drop out of regulation below ~2.8V input. Therefore, the LMS1587CSX-1.5 is best suited for stable secondary rails, not direct battery connections in harsh automotive environments.
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.
LMS1587CSX-1.5 CAD Models
Texas Instruments LMS1587CSX-1.5 PCB symbols & footprints
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