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LP2951CMMX-3.3/NOPB
Texas Instruments
IC REG LIN POS ADJ 100MA 8VSSOP
2793 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Adjustable (Fixed) 1 Output 100mA 8-VSSOP
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5.0 / 5.0
- (357 Ratings)
LP2951CMMX-3.3/NOPB
Product Overview
1289003
DiGi Electronics Part Number
LP2951CMMX-3.3/NOPB-DGManufacturer
Texas Instruments
LP2951CMMX-3.3/NOPB
Description
IC REG LIN POS ADJ 100MA 8VSSOPInventory
2793 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Adjustable (Fixed) 1 Output 100mA 8-VSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LP2951CMMX-3.3/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Adjustable (Fixed)
Number of Regulators
1
Voltage - Input (Max)
30V
Voltage - Output (Min/Fixed)
1.235V (3.3V)
Voltage - Output (Max)
29V
Voltage Dropout (Max)
0.6V @ 100mA
Current - Output
100mA
Current - Quiescent (Iq)
120 µA
Current - Supply (Max)
14 mA
PSRR
-
Control Features
Enable
Protection Features
Over Current, Over Temperature, Short Circuit
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
LP2951
Datasheet & Documents
HTML Datasheet
LP2951CMMX-3.3/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
LP2951CMMX-3.3-NDR
LP2951CMMX-3.3/NOPBTR
*LP2951CMMX-3.3/NOPB
LP2951CMMX-3.3/NOPBCT
-LP2951CMMX
LP2951CMMX33NOPB
LP2951CMMX-3.3/NOPBDKR
Standard Package
3,500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Sowohl das Web-Design als auch die schnelle Versandabwicklung haben mich überzeugt.
Dec 02, 2025
Post-purchase support is thorough; they follow up to ensure customer satisfaction.
Dec 02, 2025
They excel in fast delivery, often providing tracking updates that help me coordinate my inventory efficiently.
Dec 02, 2025
Shopping with DiGi Electronics is always cost-effective and environmentally responsible.
Dec 02, 2025
The quality assurance from DiGi Electronics gives me confidence in every purchase.
Dec 02, 2025
DiGi Electronics provides budget-friendly options with a thoughtful approach to packaging.
Dec 02, 2025
The shipping was quick, and their support team provided helpful troubleshooting tips.
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Frequently Asked Questions (FAQ)
When designing in the LP2951CMMX-3.3/NOPB for a battery-powered sensor node, how can I minimize quiescent current while maintaining stable 3.3V output under varying load conditions?
The LP2951CMMX-3.3/NOPB has a typical quiescent current of 120 µA, which is low but must be managed carefully in battery applications. To minimize Iq impact, ensure the EN pin is driven high only when regulation is needed—use a microcontroller GPIO with a pull-down resistor for on-demand control. Avoid leaving the enable pin floating. Additionally, use low-ESR ceramic capacitors (≥1µF) on both input and output to maintain stability during transient load steps, especially as battery voltage declines toward the dropout voltage. This prevents oscillation or voltage droop while preserving efficiency in duty-cycled systems.
Can the LP2951CMMX-3.3/NOPB replace the MAX17498D in a 24V industrial control circuit, and what design modifications are required?
The LP2951CMMX-3.3/NOPB can partially replace the MAX17498D in low-current 24V systems where a linear regulator is acceptable, but key differences exist. The MAX17498D is a switching controller; replacing it with the LP2951CMMX-3.3/NOPB introduces significant thermal risk due to power dissipation in linear regulation (e.g., dropping 24V to 3.3V at 100mA dissipates ~2.07W). Only consider this substitution in <20mA load applications with adequate PCB copper for heat spreading. Also, confirm that input transients don’t exceed 30V, as the LP2951CMMX-3.3/NOPB lacks the MAX17498D’s higher input tolerance and active clamp protection.
What are the thermal risks when operating the LP2951CMMX-3.3/NOPB at full 100mA output in a sealed enclosure at 85°C ambient?
Operating the LP2951CMMX-3.3/NOPB at 100mA in a sealed 85°C environment creates substantial thermal stress. With a 24V input, power dissipation is ~2.07W. The LP2951CMMX-3.3/NOPB in 8-VSSOP has a θJA of ~200°C/W, leading to an estimated junction temperature rise of 414°C—far exceeding the 125°C max TJ. This will trigger thermal shutdown. To mitigate: reduce load current below 30mA, improve PCB heatsinking with thermal vias and copper pours, or use forced air. Alternatively, pre-regulate input with a buck converter to drop voltage below 6V before the LP2951CMMX-3.3/NOPB.
How does the fixed 3.3V output variant of the LP2951CMMX-3.3/NOPB compare to the adjustable LP2951ACM-5.0/NOPB in terms of load regulation and noise sensitivity on noisy power rails?
The LP2951CMMX-3.3/NOPB (fixed 3.3V) generally offers better load regulation and noise immunity than the adjustable LP2951ACM-5.0/NOPB when used at fixed voltages, because its internal feedback network is laser-trimmed and less susceptible to PCB leakage or noise coupling. The adjustable version relies on external resistors, introducing variability in regulation accuracy and noise pickup, especially on 50V/µs transient-heavy rails. For the LP2951CMMX-3.3/NOPB, adding a small 10nF bypass capacitor across the input helps suppress high-frequency noise without compensation issues, which isn’t always safe with the adjustable variant.
Is the LP2951CMMX-3.3/NOPB suitable for automotive load dump scenarios where input voltage can transiently exceed 30V?
The LP2951CMMX-3.3/NOPB is not safe for direct exposure to automotive load dump events, which can reach 40V for hundreds of milliseconds. With a max input voltage of 30V, even brief transients risk permanent damage. To use the LP2951CMMX-3.3/NOPB in automotive applications, always pair it with a transient voltage suppression (TVS) diode and series impedance (e.g., PTC or resistor) on the input. Alternatively, use a pre-regulator stage or select a qualified automotive-grade LDO like the LM78L33A-Q1, which has higher transient robustness and AEC-Q100 qualification.
Quality Assurance (QC)
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LP2951CMMX-3.3/NOPB CAD Models
Texas Instruments LP2951CMMX-3.3/NOPB PCB symbols & footprints
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