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LM5001SD
Texas Instruments
IC REG MULT CONFIG ADJ 8WSON
65850 Pcs New Original In Stock
Boost, Flyback, Forward Converter, SEPIC Switching Regulator IC Positive, Isolation Capable Adjustable 3.1V 1 Output 800mA (Switch) 8-WDFN Exposed Pad
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5.0 / 5.0
- (385 Ratings)
LM5001SD
Product Overview
1283970
DiGi Electronics Part Number
LM5001SD-DGManufacturer
Texas Instruments
LM5001SD
Description
IC REG MULT CONFIG ADJ 8WSONInventory
65850 Pcs New Original In Stock
Boost, Flyback, Forward Converter, SEPIC Switching Regulator IC Positive, Isolation Capable Adjustable 3.1V 1 Output 800mA (Switch) 8-WDFN Exposed Pad
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LM5001SD Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
-
Product Status
Obsolete
Function
Step-Up, Step-Up/Step-Down
Output Configuration
Positive, Isolation Capable
Topology
Boost, Flyback, Forward Converter, SEPIC
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
3.1V
Voltage - Input (Max)
75V
Voltage - Output (Min/Fixed)
3.1V
Voltage - Output (Max)
76V (Switch)
Current - Output
800mA (Switch)
Frequency - Switching
50kHz ~ 1.5MHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-WDFN Exposed Pad
Supplier Device Package
8-WSON (4x4)
Base Product Number
LM5001
Datasheet & Documents
HTML Datasheet
LM5001SD-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM5001SDCT
LM5001SDTR
LM5001SDDKR
Standard Package
1,000
Alternative Parts
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
포장재 재활용이 가능해서 환경 보호에 도움을 주는 것 같아 좋아요.
de desembre 02, 2025
物流ネットワークの効率性は他にないレベルだと思います。
de desembre 02, 2025
The speed of delivery exceeded my expectations, and the packaging was top-notch.
de desembre 02, 2025
I am impressed with how their prices align with the quality they deliver.
de desembre 02, 2025
The customer service team was incredibly professional and went above and beyond to assist me. Very impressed!
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Frequently Asked Questions (FAQ)
What are the risks of using the LM5001SD in a new design given its obsolete status, and what are the recommended drop-in replacements?
The LM5001SD is marked as obsolete by Texas Instruments, which poses supply chain and long-term reliability risks for new designs. While it remains functional and available in limited inventory (65,780 pcs), future production runs may face component shortages. The recommended replacement is the LM5001SD/NOPB, which is pin-compatible and RoHS-compliant. However, designers should verify thermal performance and switching behavior under load, as subtle internal changes may affect EMI or loop stability. For new designs requiring higher efficiency, consider migrating to synchronous alternatives like the LM5122, though PCB layout changes will be necessary due to different pinouts and control schemes.
How can I ensure stable feedback loop response when configuring the LM5001SD in a flyback topology with wide input voltage variations?
When using the LM5001SD in flyback configurations with input voltages ranging from 3.1V to 75V, maintaining loop stability requires careful compensation network design. The LM5001SD's current-mode control demands a properly placed pole-zero pair in the error amplifier feedback path to avoid subharmonic oscillations at high duty cycles. Use a type 2 or type 3 compensator with a zero set near the dominant pole of the power stage. At high input voltages (>48V), parasitic capacitance on the FB pin can introduce phase lag; minimize trace length and consider shielding. Include a soft-start capacitor to prevent output overshoot during power-up, especially in telecom applications where input ramp times vary.
Can the LM5001SD safely operate at 75V input in a harsh environment with ambient temperatures up to 110°C, and what thermal design considerations are critical?
While the LM5001SD supports up to 75V input and has a junction rating of 125°C, operating at full input voltage in 110°C ambient pushes thermal limits. With no synchronous rectifier, power dissipation in the integrated 800mA switch increases significantly at high duty cycles. To ensure safe operation, use a 4-layer PCB with ample thermal vias beneath the exposed pad (8-WSON), connect to solid ground planes, and minimize copper conduction paths for heat. Simulate worst-case losses using TI's PowerPAD guidelines. Derate maximum load current by at least 25% if forced airflow is absent. Monitor TJ during HALT testing to prevent premature aging or latch-up.
What design modifications are needed when replacing the LM25001 with the LM5001SD, and how do their protection features differ?
Although both the LM25001 and LM5001SD are boost/SEPIC regulators in 8-WSON packages, direct replacement requires caution. The LM5001SD has a higher maximum switch voltage (76V vs. 65V), enabling wider input range, but lacks the LM25001's built-in thermal shutdown. Instead, it relies solely on current limiting and external thermal management. You must add overtemperature protection via a discrete circuit or MCU monitoring. Also, the LM5001SD's adjustable frequency range (50kHz–1.5MHz) allows EMI band avoidance, but higher frequencies increase switching losses. Update snubber circuits and ensure gate drive strength is sufficient when scaling up power levels.
How does the absence of synchronous rectification in the LM5001SD affect efficiency in continuous conduction mode (CCM) at high load currents?
The lack of synchronous rectification in the LM5001SD leads to significant conduction losses in CCM, especially at high output currents near 800mA. The internal MOSFET switch conducts current during the on-time, but the external flywheel diode (typically a high-speed Schottky) carries current during off-time, introducing a voltage drop of 0.4–0.8V. This reduces efficiency by 8–15% compared to synchronous converters like the LM5101. To mitigate losses, select ultra-fast, low-VF diodes with low capacitance to minimize reverse recovery. In low-duty-cycle applications (e.g., boost from 12V to 15V), efficiency can exceed 88%, but in high-step-up ratios (5V to 48V), efficiency may drop below 75%, requiring thermal planning and possible derating.
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.
LM5001SD CAD Models
Texas Instruments LM5001SD PCB symbols & footprints
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