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LM5008MM/NOPB
Texas Instruments
IC REG BUCK ADJ 350MA 8VSSOP
18673 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 2.5V 1 Output 350mA 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
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5.0 / 5.0
- (257 Ratings)
LM5008MM/NOPB
Product Overview
1336317
DiGi Electronics Part Number
LM5008MM/NOPB-DGManufacturer
Texas Instruments
LM5008MM/NOPB
Description
IC REG BUCK ADJ 350MA 8VSSOPInventory
18673 Pcs New Original In Stock
Buck Switching Regulator IC Positive Adjustable 2.5V 1 Output 350mA 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Quantity
Minimum 1
Minimum 1
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LM5008MM/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Not For New Designs
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
1
Voltage - Input (Min)
9.5V
Voltage - Input (Max)
95V
Voltage - Output (Min/Fixed)
2.5V
Voltage - Output (Max)
75V
Current - Output
350mA
Frequency - Switching
50kHz ~ 600kHz
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package
8-VSSOP
Base Product Number
LM5008
Datasheet & Documents
Manufacturer Product Page
LM5008MM/NOPB Specifications
HTML Datasheet
LM5008MM/NOPB-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
LM5008MMTR-NDR
296-LM5008MM/NOPBDKR
LM5008MM/NOPBCT-DG
-LM5008MM-NDR
-LM5008MM/NOPBCT-DG
LM5008MM/NOPBCT
LM5008MM/NOPBDKR-DG
-LM5008MM/NOPBCT
LM5008MMCT-NDR
LM5008MM/NOPBDKR
296-LM5008MM/NOPBCT
LM5008MM/NOPBTR
LM5008MM/NOPBTR-DG
*LM5008MM/NOPB
LM5008MMNOPB
296-LM5008MM/NOPBTR
Standard Package
1,000
Alternative Parts
PART 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
배송이 늦지 않고 포장도 견고해서 훌륭했어요.
de desembre 02, 2025
The checkout process is streamlined, with minimal steps, making purchasing hassle-free.
de desembre 02, 2025
The quality of their goods has resulted in fewer callbacks and warranty issues.
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Frequently Asked Questions (FAQ)
Can the LM5008MM/NOPB be used as a drop-in replacement for the LM2596 in a high-voltage industrial power supply design, and what key limitations should I consider?
The LM5008MM/NOPB is not a direct drop-in replacement for the LM2596 due to significant architectural and performance differences. While both are buck regulators, the LM5008MM/NOPB supports a much wider input voltage range (9.5V to 95V) compared to the LM2596’s 4.5V–40V, making it better suited for high-voltage applications like 48V or 72V industrial systems. However, the LM5008MM/NOPB has a lower max output current (350mA vs. 3A for the LM2596) and lacks synchronous rectification, resulting in lower efficiency at higher loads. Additionally, its switching frequency range (50kHz–600kHz) is lower and less optimized for compact designs. If your application requires >350mA or high efficiency at moderate loads, consider the newer TPS54360 instead. Use the LM5008MM/NOPB only when ultra-high input voltage tolerance is critical and load current is well below 300mA.
What are the thermal and layout risks when using the LM5008MM/NOPB in a compact, high-temperature industrial enclosure with minimal airflow?
The LM5008MM/NOPB in the 8-VSSOP package has limited thermal dissipation capability, especially under high input-to-output differential voltage conditions. In a sealed or high-ambient-temperature environment (e.g., >85°C), power dissipation can cause junction temperatures to exceed safe limits even at 350mA. For example, with a 48V input and 5V output at 300mA, power loss can exceed 12.9W in conduction alone, leading to rapid thermal runaway without proper heatsinking. To mitigate this, ensure a solid ground plane under the package, use thermal vias, and minimize trace resistance on the SW and GND pins. Avoid placing heat-sensitive components nearby. Consider derating the output current by 30% above 85°C ambient. If thermal headroom is insufficient, evaluate alternatives like the LM5164, which offers better thermal performance in similar packages.
How does the absence of synchronous rectification in the LM5008MM/NOPB impact efficiency and EMI in a 24V-to-3.3V battery-powered sensor node?
The lack of synchronous rectification in the LM5008MM/NOPB means it uses an internal diode for freewheeling current, which increases conduction losses—especially at low output voltages like 3.3V. In a 24V-to-3.3V conversion at 250mA, efficiency may drop to 70–75%, significantly reducing battery life in remote sensor applications. This also increases heat generation, requiring careful thermal management. Additionally, the diode’s reverse recovery can introduce higher voltage spikes and EMI, particularly at the switching node (SW pin). To reduce EMI, use a snubber network (e.g., 100Ω + 1nF) across the inductor and minimize loop area in the high-di/dt path. For better efficiency and cleaner switching, consider synchronous alternatives like the TPS56221, though they may not support the LM5008MM/NOPB’s 95V input range.
Is the LM5008MM/NOPB suitable for automotive 12V/24V systems where load dump transients can exceed 60V, and how should I protect it?
While the LM5008MM/NOPB can tolerate up to 95V input, automotive load dumps (e.g., ISO 7637-2) can produce transients exceeding 80V for hundreds of milliseconds, pushing the device near its absolute maximum rating. Although it may survive brief events, long-term reliability is compromised without external protection. Always include a transient voltage suppressor (TVS) diode rated for 60–70V clamping (e.g., SMAJ58A) and a series input fuse or polyfuse. Add a 10–47µF ceramic capacitor close to the VIN pin to handle high-frequency energy. For harsh environments, consider a pre-regulator or use a more robust automotive-grade alternative like the LM5165-Q1, which is AEC-Q100 qualified and designed for such transients. The LM5008MM/NOPB is not recommended for new automotive designs due to its 'Not For New Designs' status.
Given that the LM5008MM/NOPB is marked 'Not For New Designs,' what are the best long-term replacement options that maintain high-voltage capability and similar footprint?
Since the LM5008MM/NOPB is obsolete for new designs, Texas Instruments recommends migrating to modern alternatives with improved efficiency, thermal performance, and longevity. The LM5164 (8-VSSOP, 65V input, 150mA) or LM5165 (12-VSSOP, 65V input, 350mA) are direct functional upgrades with synchronous rectification and better EMI behavior. For applications requiring the full 95V input range, the LM5148 (16-HTSSOP) supports up to 100V and 1A output with external FETs. While package sizes differ slightly, the LM5165 offers the closest balance of footprint compatibility and performance. Always verify control loop stability and compensation when replacing, as newer devices may have different feedback architectures. Avoid redesigns that rely on the LM5008MM/NOPB for new products—design in a supported part to ensure supply continuity and reliability.
Quality Assurance (QC)
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LM5008MM/NOPB CAD Models
Texas Instruments LM5008MM/NOPB PCB symbols & footprints
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