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LM2937ES-2.5/NOPB
Texas Instruments
IC REG LIN 2.5V 500MA DDPAK
1583 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA TO-263 (DDPAK-3)
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5.0 / 5.0
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LM2937ES-2.5/NOPB
Product Overview
1319700
DiGi Electronics Part Number
LM2937ES-2.5/NOPB-DGManufacturer
Texas Instruments
LM2937ES-2.5/NOPB
Description
IC REG LIN 2.5V 500MA DDPAKInventory
1583 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA TO-263 (DDPAK-3)
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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LM2937ES-2.5/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Tube
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
26V
Voltage - Output (Min/Fixed)
2.5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
1V @ 500mA
Current - Output
500mA
Current - Quiescent (Iq)
10 mA
Current - Supply (Max)
20 mA
PSRR
-
Control Features
-
Protection Features
Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage
Operating Temperature
-40°C ~ 125°C (TJ)
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
LM2937
Datasheet & Documents
HTML Datasheet
LM2937ES-2.5/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
*LM2937ES-2.5/NOPB
LM2937ES25NOPB
-LM2937ES-2.5/NOPB-DG
LM2937ES-2.5-NDR
Standard Package
45
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Der Kundenservice bei DiGi Electronics ist äußerst reaktionsschnell und hilfsbereit, was meinen Kaufprozess sehr angenehm gemacht hat.
Dec 02, 2025
リーズナブルでエコな包装に、大変満足しています。
Dec 02, 2025
リーズナブルな価格設定と素早い対応が気に入っています。
Dec 02, 2025
The website's clearly labeled sections made exploring different areas simple.
Dec 02, 2025
The turnaround time from order placement to delivery is remarkable, aiding in keeping my manufacturing schedule on track.
Dec 02, 2025
Tracking notifications arrived faster than expected, enhancing my overall purchase confidence.
Dec 02, 2025
My order arrived quickly, and the support team was very responsive and knowledgeable.
Dec 02, 2025
I had a minor issue after receiving my order, and the support team resolved it swiftly and courteously.
Dec 02, 2025
I appreciate how DiGi Electronics offers high-quality products at very competitive prices, making it a great value for my budget.
Dec 02, 2025
Quick dispatch and responsive customer service made this shopping experience excellent.
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Frequently Asked Questions (FAQ)
What are the main thermal design-in risks when using the LM2937ES-2.5/NOPB in a high-temperature industrial environment?
When designing the LM2937ES-2.5/NOPB into industrial systems operating near 125°C junction temperature, the primary risk is thermal overload due to insufficient PCB copper heat sinking. With a dropout voltage of up to 1V at 500mA, power dissipation can reach 1W or more under high input-output differentials. To mitigate this, use a minimum 1in² copper pad with thermal vias connected to ground planes for effective heat transfer. Avoid enclosed spaces without airflow, and consider derating output current above 85°C ambient. The built-in over-temperature protection prevents immediate failure but cycling during thermal shutdown can disrupt system stability, so proper thermal planning is critical.
How does the LM2937ES-2.5/NOPB compare to the AMS1117-2.5 in terms of dropout voltage and fault protection for battery-powered designs?
The LM2937ES-2.5/NOPB offers superior dropout performance and integrated protection compared to the AMS1117-2.5 in portable applications. While both regulators support 2.5V fixed output, the LM2937ES-2.5/NOPB guarantees a max dropout of 1V at 500mA, improving efficiency in partially discharged battery conditions. More importantly, it includes mirror-image insertion protection, short-circuit protection, and transient voltage suppression—features absent in the AMS1117-2.5. This makes the LM2937ES-2.5/NOPB more robust in field deployments where power reversals or load faults may occur, reducing risk of field failures in consumer or automotive-grade systems.
Can the LM2937ES-2.5/NOPB safely replace the LM2940CT-2.5 in an existing design without modifying the PCB layout?
Direct replacement of the LM2940CT-2.5 with the LM2937ES-2.5/NOPB requires careful review of footprint and thermal performance, despite both being TO-263 (D²PAK) packages. The LM2937ES-2.5/NOPB has a slightly different pinout (Tab = Ground, Lead 3 = GND) and tighter thermal requirements. While pin-compatible in most cases, verify PCB via placement and grounding strategy—especially if the original design used minimal copper. Additionally, the LM2937ES-2.5/NOPB has higher quiescent current (10mA vs ~5mA), which may impact long-term battery life. Confirm transient load response and input voltage stability, particularly below 6V, as dropout behavior differs under dynamic loads.
What PCB layout practices should be followed to minimize transient voltage spikes with the LM2937ES-2.5/NOPB in automotive applications?
In automotive environments with frequent load dumps and cold cranking, the LM2937ES-2.5/NOPB's transient voltage protection must be supported by proper PCB layout. Place a low-ESR 10µF tantalum or ceramic capacitor (with derating) at the input, as close as possible to the device, to absorb surges up to 26V. Use a 1µF ceramic capacitor on the output to stabilize transient response. Keep high-current paths short and direct, and tie the ground connection through the tab to a solid ground plane. Avoid shared traces with high-speed digital signals to prevent coupling. These steps maximize the LM2937ES-2.5/NOPB’s internal transient protection, reducing risk of unexpected shutdowns or downstream IC damage.
What derating guidelines should be applied to ensure long-term reliability of the LM2937ES-2.5/NOPB in sealed outdoor enclosures?
For LM2937ES-2.5/NOPB deployments in sealed outdoor enclosures, active derating is essential for reliability. Limit continuous output current to 300–350mA (60–70% of 500mA rating) to reduce thermal stress. Since convection cooling is restricted, assume internal enclosure temperatures may exceed 90°C. Use a thermal pad or heatsink on the PCB's backside if possible. Prefer wide copper traces (≥5mm) on VIN, VOUT, and GND to improve heat spreading. Additionally, verify that input voltage does not exceed 20V under normal operation to reduce power dissipation, even though the absolute max rating is 26V. These measures enhance longevity and prevent early degradation due to thermal cycling or junction overheating.
Quality Assurance (QC)
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LM2937ES-2.5/NOPB CAD Models
Texas Instruments LM2937ES-2.5/NOPB PCB symbols & footprints
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