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LP3871ES-2.5/NOPB
Texas Instruments
IC REG LINEAR 2.5V 800MA DDPAK
1910 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 800mA TO-263 (DDPAK-5)
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5.0 / 5.0
- (294 Ratings)
LP3871ES-2.5/NOPB
Product Overview
1341553
DiGi Electronics Part Number
LP3871ES-2.5/NOPB-DGManufacturer
Texas Instruments
LP3871ES-2.5/NOPB
Description
IC REG LINEAR 2.5V 800MA DDPAKInventory
1910 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 800mA TO-263 (DDPAK-5)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LP3871ES-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)
7V
Voltage - Output (Min/Fixed)
2.5V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.35V @ 800mA
Current - Output
800mA
Current - Quiescent (Iq)
5 mA
Current - Supply (Max)
15 mA
PSRR
73dB ~ 57dB (120Hz)
Control Features
Enable
Protection Features
Over Current, Over Temperature, Short Circuit
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package
TO-263 (DDPAK-5)
Base Product Number
LP3871
Datasheet & Documents
HTML Datasheet
LP3871ES-2.5/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LP3871ES-2.5/NOPB-DG
2156-LP3871ES-2.5/NOPB-TI
296-41571-5
LP3871ES-2.5-NDR
TEXTISLP3871ES-2.5/NOPB
LP3871ES25NOPB
*LP3871ES-2.5/NOPB
Standard Package
45
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
Leur service après-vente est un vrai atout, ils interviennent rapidement pour assurer notre satisfaction.
de desembre 02, 2025
Je recommande chaudement DiGi Electronics pour ses prix et son support après-vente toujours réactif.
de desembre 02, 2025
Service logistique irréprochable, chaque commande arrive vite et en parfait état.
de desembre 02, 2025
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de desembre 02, 2025
Always impressed by their reasonable prices and sustainable packaging.
de desembre 02, 2025
Quick shipping times from DiGi Electronics enable me to experiment more freely and iteratively.
de desembre 02, 2025
Their customer service team is highly responsive, providing timely assistance whenever needed.
de desembre 02, 2025
I find their prices very reasonable, and the eco packaging is a pleasant surprise.
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Frequently Asked Questions (FAQ)
What are the thermal design considerations when using the LP3871ES-2.5/NOPB in a high-ambient-temperature environment near 125°C?
When operating the LP3871ES-2.5/NOPB in environments approaching 125°C, thermal management becomes critical due to its linear regulation architecture. The LP3871ES-2.5/NOPB dissipates excess voltage as heat, so power dissipation (Vin - Vout) × Iload must be calculated carefully. For example, with a 7V input and 2.5V at 800mA output, power loss is 3.6W, requiring an adequate PCB copper heatsink or external heatsink on the DDPAK-5 package. Use thermal vias under the exposed pad and ensure ≥4-layer board construction to improve thermal performance. Without proper thermal design, the internal thermal shutdown protection will activate intermittently, causing output instability. Simulate worst-case junction temperature using the 33.8°C/W thermal resistance (junction-to-ambient, no heatsink) to avoid reliability degradation.
Can the LP3871ES-2.5/NOPB replace the LM1117-2.5 in a 2.5V supply rail redesign, and what design-in risks should I evaluate?
Yes, the LP3871ES-2.5/NOPB can replace the LM1117-2.5 in many 2.5V applications, but key differences must be addressed. The LP3871ES-2.5/NOPB offers lower dropout (350 mV at 800mA vs. 1V for LM1117), improved PSRR (up to 73dB), and an enable pin for power sequencing—advantages in noise-sensitive and battery-powered systems. However, the LP3871ES-2.5/NOPB has a maximum input voltage of 7V, compared to the LM1117’s 15V limit, so verify your input rail (e.g., a 12V system would violate LP3871ES-2.5/NOPB’s rating). Additionally, check enable pin pull-up/down logic to avoid unintended disable states. Ensure PCB layout accommodates the TO-263 (DDPAK-5) footprint similarly, but verify thermal pad connection to ground plane. This replacement improves efficiency at lower headroom but increases risk if input voltage exceeds 7V.
How does the enable pin behavior affect power sequencing in systems using the LP3871ES-2.5/NOPB with other PMICs?
The enable pin on the LP3871ES-2.5/NOPB allows for precise power sequencing control, but improper handling can lead to start-up failures. The enable threshold is typically 1.3V with hysteresis, so use a clean digital signal (e.g., from a supervisor IC or FPGA GPIO) referenced to the LP3871ES-2.5/NOPB’s input supply. Avoid floating the pin—use a 100kΩ pull-up to VIN to ensure default on-state unless sequencing is required. In multi-rail systems, coordinate the LP3871ES-2.5/NOPB’s enable with upstream regulators; enabling it before its input stabilizes risks inrush or brown-out. Include a small delay via RC network or programmable sequencer if needed. Note: the LP3871ES-2.5/NOPB does not have a power-good output, so downstream devices need separate monitoring for sequencing integrity.
What are the stability and output capacitor requirements for the LP3871ES-2.5/NOPB, and how do ESR variations impact performance?
The LP3871ES-2.5/NOPB requires a minimum 10μF output capacitor with ESR between 30mΩ and 1Ω for loop stability; low-ESR ceramic capacitors <30mΩ can cause oscillation. To safely use ceramic capacitors, either add a series resistor (e.g., 0.1Ω) to increase effective ESR or select a tantalum capacitor. Avoid X5R/X7R ceramics with high capacitance derating—choose voltage-rated caps at least 1.5× Vout (i.e., 4V or higher for 2.5V). Place the output capacitor within 1 cm of the LP3871ES-2.5/NOPB output pin, with minimal loop area to ground. For transient response in high-dynamic-load applications (e.g., MCU sleep/wake), paralleling a 22μF tantalum with a 1μF ceramic improves stability and transient suppression. Confirm stability via load step testing under worst-case temperature and input conditions.
Is the LP3871ES-2.5/NOPB suitable for automotive applications with frequent load dump or reverse polarity events?
The LP3871ES-2.5/NOPB is not inherently protected against load dump or reverse polarity, limiting its direct use in automotive power systems. While it operates across the industrial temperature range (-40°C to 125°C), typical of automotive under-the-hood environments, the 7V absolute maximum input voltage is insufficient during load dump events (which can exceed 40V). Reverse polarity will damage the device since it lacks internal protection diodes. To use the LP3871ES-2.5/NOPB in automotive, add an external series Schottky diode for reverse polarity protection and a transient voltage suppressor (TVS) diode rated for ISO 7637-2 pulses on VIN. Also include a pre-regulator (e.g., buck converter) if sourcing from 12V battery rails. Without these protections, the LP3871ES-2.5/NOPB risks catastrophic failure in automotive electrical environments.
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LP3871ES-2.5/NOPB CAD Models
Texas Instruments LP3871ES-2.5/NOPB PCB symbols & footprints
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