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LP5951MFX-2.5/NOPB
Texas Instruments
IC REG LINEAR 2.5V 150MA SOT23-5
18032 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5
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5.0 / 5.0
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LP5951MFX-2.5/NOPB
Product Overview
1263019
DiGi Electronics Part Number
LP5951MFX-2.5/NOPB-DGManufacturer
Texas Instruments
LP5951MFX-2.5/NOPB
Description
IC REG LINEAR 2.5V 150MA SOT23-5Inventory
18032 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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LP5951MFX-2.5/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
5.5V
Voltage - Output (Min/Fixed)
2.5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.35V @ 150mA
Current - Output
150mA
Current - Quiescent (Iq)
55 µA
Current - Supply (Max)
70 µA
PSRR
60dB ~ 50dB (100Hz ~ 10kHz)
Control Features
Enable
Protection Features
Over Current, Over Temperature, Short Circuit
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SC-74A, SOT-753
Supplier Device Package
SOT-23-5
Base Product Number
LP5951
Datasheet & Documents
Manufacturer Product Page
LP5951MFX-2.5/NOPB Specifications
HTML Datasheet
LP5951MFX-2.5/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
296-38188-2
TEXTISLP5951MFX-2.5/NOPB
296-38188-1
-296-38188-1-DG
296-38188-6
-LP5951MFX
2156-LP5951MFX-2.5/NOPB-TI
LP5951MFX-2.5/NOPB-DG
Standard Package
3,000
Alternative Parts
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MANUFACTURER
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UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
客服團隊反應迅速，解決問題迅速且有效，讓整個購物體驗非常愉快。
грудня 02, 2025
Les prix chez DiGi Electronics sont vraiment avantageux, ce qui me permet d'acheter en quantité sans dépasser mon budget.
грудня 02, 2025
幅広い商品展開により、さまざまな用途に対応できてとても助かっています。
грудня 02, 2025
I ordered a device from DiGi Electronics late at night and was amazed when it arrived by the next afternoon, well-packaged and intact.
грудня 02, 2025
DiGi Electronics excels in both affordability and logistics efficiency.
грудня 02, 2025
Logistics was seamless; my purchase arrived earlier than expected, thanks to their efficient delivery system.
грудня 02, 2025
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грудня 02, 2025
The company’s after-sales service reflects their genuine commitment to customer happiness.
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Frequently Asked Questions (FAQ)
When designing in the LP5951MFX-2.5/NOPB, what PCB layout best practices help minimize thermal issues in high-ambient-temperature environments?
To prevent thermal shutdown in high-ambient conditions (up to 125°C), optimize PCB copper layout for thermal dissipation when using the LP5951MFX-2.5/NOPB. Use at least two thermal vias under the exposed pad (if applicable—though SOT-23-5 has limited thermal pad options) and connect to ground or power planes to act as heat spreaders. Keep high-power traces away from the LP5951MFX-2.5/NOPB, and ensure sufficient copper area on the input and output lines for current handling. Avoid placing nearby heat-generating components such as switching regulators or power resistors. In applications where Vin is close to 5.5V and load current approaches 150mA, calculate the power dissipation (Vin-Vout) × Iload, and verify with TI's thermal resistance data to ensure safe junction temperature operation.
Can the LP5951MFX-2.5/NOPB be used as a drop-in replacement for the NCV8702SN28T1G in a noise-sensitive analog sensor module?
The LP5951MFX-2.5/NOPB is not a direct pin-to-pin or voltage-compatible replacement for the NCV8702SN28T1G, which outputs 2.8V versus the LP5951MFX-2.5/NOPB’s fixed 2.5V output. While both are low-Iq linear regulators in SOT-23-5 packages with enable control and similar PSRR (~60dB at low frequencies), switching between them requires adjusting downstream voltage compatibility—especially for sensors requiring precise reference voltages. Additionally, the LP5951MFX-2.5/NOPB offers lower dropout (350mV at 150mA) and better quiescent current (55µA), making it more efficient in battery-powered systems, but confirm 2.5V suffices for your signal chain accuracy before substituting.
How does the LP5951MFX-2.5/NOPB handle transient load steps in portable medical devices with intermittent RF transmission?
The LP5951MFX-2.5/NOPB responds reasonably well to moderate transient loads due to its 60dB PSRR at 100Hz decreasing to 50dB at 10kHz and internal compensation design, but in systems with fast load steps—such as RF modules powering on briefly—external output capacitance optimization is critical. Use a minimum 1µF X7R ceramic capacitor with low ESR close to the output pin, and consider adding an additional 4.7µF if transients exceed 50mA/µs. Stability is ensured with ceramic capacitors, but verify transient response under real load conditions. For RF-sensitive applications, couple this with proper layout isolation to avoid coupling noise from digital or RF sections into the LP5951MFX-2.5/NOPB’s output.
What are the risks of using the LP5951MFX-2.5/NOPB near its maximum 5.5V input voltage in automotive environments with load dump transients?
Operating the LP5951MFX-2.5/NOPB near its 5.5V absolute maximum input voltage poses significant risk in automotive applications where load dump transients can exceed 40V. Even with upstream protection, voltage spikes from inductive loads or regulator coexistence on shared supplies may exceed the 5.5V limit, potentially damaging the LP5951MFX-2.5/NOPB. Always include transient voltage suppression (TVS) diodes and current-limiting resistors or a bulk pre-regulator (e.g., 5V buck converter) when sourcing from unregulated 12V rails. The LP5951MFX-2.5/NOPB is suitable for stable 5V domains but not for direct battery connection in automotive systems without proper front-end protection.
How does the enable pin behavior of the LP5951MFX-2.5/NOPB affect power sequencing in multi-rail FPGA designs?
The enable pin on the LP5951MFX-2.5/NOPB allows precise power control, which is critical for FPGA power sequencing where 2.5V I/O rails must power up/down in a specific order relative to core voltages. The enable threshold is typically 1.2V with hysteresis, making it compatible with 1.8V and 3.3V logic. However, avoid floating the enable pin—always use a pull-down resistor (100kΩ recommended) to ensure the regulator starts off during power-up. For sequencing, tie the enable to a GPIO or a power-good signal from another regulator (e.g., after a 3.3V rail stabilizes). Be cautious of inrush current during turn-on: use slow enable edges (10kΩ pull-up with capacitor if needed) to prevent output voltage overshoot, especially with large load capacitances over 10µF.
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.
LP5951MFX-2.5/NOPB CAD Models
Texas Instruments LP5951MFX-2.5/NOPB PCB symbols & footprints
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