My Inquiry
My Account
Texas Instruments LP3874EMP-2.5/NOPB
- Part No.:
- LP3874EMP-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-5, TO-261AB
- Datasheet:
-
LP3874EMP-2.5/NOPB.pdf
- Description:
- IC REG LIN 2.5V 800MA SOT223-5
- Quantity:
- Payment:
- Shipping:
Inventory:905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP3874EMP-2.5/NOPB from Texas Instruments is a 2.5-V, 0.8-A ultra-low-dropout linear regulator in DDPAK/TO-263-5 package, featuring 240 mV dropout at full load, ±1.5% output voltage accuracy at 25°C, and 10 nA shutdown quiescent current - designed for microprocessor core power and remote-sense battery-powered systems.
For engineers reviewing the LP3874EMP-2.5/NOPB datasheet, LP3874EMP-2.5/NOPB pinout, LP3874EMP-2.5/NOPB application, or LP3874EMP-2.5/NOPB equivalent, key selection criteria include verified SENSE-pin-enabled remote load regulation, thermal-limited short-circuit protection, −40°C to +125°C junction operation, and compatibility with 10 µF tantalum output capacitors per TI SNVS225H.
Technical Context
The LP3874EMP-2.5/NOPB uses a PMOS pass element on a CMOS process enabling ultra-low dropout (24 mV @ 80 mA) and load-independent quiescent current. Its dedicated SENSE pin closes the feedback loop at the remote load, decoupling regulation from PCB trace resistance - unlike the LP3871 which regulates only at the OUT pin.
It integrates ERROR flag with 10% VOUT threshold and 5% hysteresis, active-low open-drain output requiring external 10-kΩ pullup; shutdown is controlled by CMOS-compatible SD pin with 25 µs turnon delay and 20 µs turnoff delay. Thermal shutdown and current limiting operate independently to protect during overload or ambient rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±1.5% at 25°C; ±3% over −40°C to +125°C - ensures stable core bias for low-voltage logic without external resistors. |
| Max Output Current | 0.8 A DC continuous - supports single-core microprocessors and DSPs without derating at TJ ≤ 125°C with proper heatsinking. |
| Dropout Voltage | 240 mV typical at 0.8 A - enables operation from 2.74 V input when powering 2.5 V loads, critical for Li-ion single-cell systems. |
| Ground Pin Current | 6 mA typical at 0.8 A - minimizes wasted supply current while maintaining fast transient response and low noise. |
| Shutdown IQ | 10 nA typical - reduces standby battery drain to negligible levels in always-on IoT edge nodes and portable instrumentation. |
| PSRR | 73 dB at 120 Hz (VIN = VOUT + 1 V) - suppresses ripple from upstream switching regulators, preserving analog signal integrity. |
| Thermal Resistance | RθJA = 40.3°C/W (DDPAK) - requires ≥ 4 cm² copper pour for 0.8 A operation at TA = 85°C without forced air. |
Pinout & Package
LP3874EMP-2.5/NOPB is housed in a thermally enhanced DDPAK/TO-263-5 package (10.16 mm × 8.42 mm), with exposed thermal pad soldered to PCB ground plane for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.5 V to 7 V; internal PMOS gate driven from this rail - must be bypassed with ≥10 µF capacitor near pin. |
| OUT | Regulated output | Delivers 2.5 V to local loads; connects to SENSE only if remote sensing is not used - otherwise SENSE carries primary feedback. |
| GND | Power ground reference | Common return for IN, OUT, SD, ERROR, and SENSE; must tie directly to thermal pad and low-impedance ground plane. |
| ERROR | Open-drain fault indicator | Asserts low when VOUT drops >10% below 2.5 V; requires external 10-kΩ pullup to VIN - signals undervoltage to host controller. |
| SENSE | Remote output voltage sense | Connects directly to load point to compensate for IR drop in PCB traces - enables ±0.04% load regulation at point-of-load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-dropout architecture | 24 mV dropout @ 80 mA enables operation from 2.54 V input for 2.5 V output - extends usable battery range in single-cell systems. |
| SENSE pin for remote regulation | Eliminates voltage error from trace resistance up to 100 mΩ at 0.8 A - maintains 2.5 V ±1.5% at load instead of at regulator output. |
| Integrated ERROR flag | 10% VOUT threshold with 5% hysteresis provides reliable brownout detection without external comparators or voltage dividers. |
| Thermal + current limiting | Independent protection circuits cycle output during sustained overload - prevents permanent damage without external circuitry. |
| Low-noise output | 150 µVRMS (10 Hz–100 kHz) and 73 dB PSRR enable clean power for ADCs, PLLs, and RF front-ends in mixed-signal designs. |
Applications
| Microprocessor Core Supply | GTL/GTL+ Bus Termination |
|---|---|
|
Use Scenario: Powering ARM Cortex-M4 core running at 120 MHz with dynamic current draw from 10 mA to 0.8 A. IC Role / Device Role / Timing Role: Primary LDO delivering tightly regulated 2.5 V with <25 µs transient response to maintain timing margins during clock domain switches. Use Value: SENSE pin ensures 2.5 V ±1.5% at CPU VCC pin despite 80 mΩ PCB trace resistance - preventing timing violations under peak load. |
Use Scenario: Providing termination voltage for high-speed GTL+ data buses in telecom line cards operating at 100 MHz. IC Role / Device Role / Timing Role: Precision 2.5 V reference source with low output impedance (<50 mΩ) to absorb bus switching transients without droop. Use Value: 0.04% load regulation and 73 dB PSRR suppress noise coupling into data eye - maintaining BER <10⁻¹² across temperature. |
| Battery-Powered Instrumentation | Post-Regulator for Switching Supplies |
|
Use Scenario: Long-life handheld multimeter powered by two AA alkaline cells (1.8 V–3.2 V input range). IC Role / Device Role / Timing Role: Main system regulator enabling 2.5 V operation down to 2.74 V input - maximizing battery capacity utilization before cutoff. Use Value: 10 nA shutdown IQ extends shelf life beyond 10 years; 240 mV dropout allows >90% of battery energy extraction before brownout. |
Use Scenario: Cleaning ripple from 3.3 V buck converter output feeding sensitive analog front-end (AFE) in medical sensor module. IC Role / Device Role / Timing Role: Low-noise post-regulator suppressing 120 Hz and 500 kHz switching artifacts to preserve 16-bit ADC SNR. Use Value: 150 µVRMS broadband noise and 57 dB PSRR @ VIN = VOUT + 0.5 V reduce RMS noise floor by 4× vs direct buck output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 20-V input, 1-A, 4-µVRMS noise, no SENSE pin, 350 mV dropout @ 1 A | Lacks remote sensing; suited for high-PSRR analog rails but not for long-trace digital loads | Choose when ultra-low noise dominates over remote regulation - e.g., precision DAC reference, not CPU core. |
| MCP1826T-2502E/DC | 2.5-V fixed, 1-A, SOT-223, 300 mV dropout @ 1 A, no ERROR flag, 50 µA quiescent current | No fault reporting or shutdown control; higher IQ limits battery runtime in always-on use | Choose for cost-sensitive, space-constrained designs where ERROR/SD functions are omitted and thermal budget permits SOT-223. |
Compared with TPS7A4700RGWR and MCP1826T-2502E/DC, LP3874EMP-2.5/NOPB uniquely balances remote-sense accuracy, sub-µA shutdown, and integrated fault signaling - making it optimal for battery-powered microprocessor systems requiring both precision and reliability.
Availability
LP3874EMP-2.5/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL+ bus terminators, battery-powered instrumentation, post-regulation of switching supplies, and other applications requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LP3874EMP-2.5/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog ICs, embedded processors, and high-reliability power management solutions for industrial, automotive, and communications markets.
The LP387x series was developed to address ultra-low-dropout, fast-transient requirements in battery-powered microprocessor systems - emphasizing remote sensing, sub-µA shutdown, and robust thermal protection in compact packages.
FAQ
What is the minimum input voltage required for LP3874EMP-2.5/NOPB to regulate 2.5 V output?
The LP3874EMP-2.5/NOPB requires a minimum input voltage of 2.74 V to maintain regulation at 2.5 V output under full 0.8-A load, based on its typical 240-mV dropout voltage. At light loads (80 mA), dropout drops to 24 mV, allowing operation from as low as 2.524 V. The absolute minimum input is 2.5 V per datasheet, but actual regulation depends on load and temperature - always verify with worst-case dropout curves in SNVS225H Figure 1.
How should the SENSE pin be connected on LP3874EMP-2.5/NOPB in a typical layout?
For remote load regulation, connect the SENSE pin directly to the load's VCC pin using a dedicated, low-impedance trace - never share this trace with power or ground currents. If remote sensing is not needed, tie SENSE directly to the OUT pin with a short, wide trace. Do not leave SENSE floating; doing so causes regulation instability and potential output overshoot during transients per TI SNVS225H Section 7.3.4.
Does LP3874EMP-2.5/NOPB require an external pullup resistor on the ERROR pin?
Yes - the ERROR pin is an open-drain output and must be pulled high with a 10-kΩ resistor to VIN to generate a valid logic-high level when the output is in regulation. Without this pullup, the ERROR signal remains undefined. If the ERROR function is unused, TI explicitly requires connecting the ERROR pin to GND - not leaving it open - to prevent leakage-induced noise coupling per SNVS225H Section 7.4.3.
What output capacitor types and values are validated for stable operation of LP3874EMP-2.5/NOPB?
Tantalum capacitors of 10 µF minimum (with ESR between 100 mΩ and 4 Ω) are recommended and validated per TI SNVS225H Figure 13 and Section 8.2.2.1. Ceramic capacitors may be used if X7R/X5R dielectric and ≥10 µF, but must be verified for voltage coefficient and temperature stability. Aluminum electrolytics are discouraged unless impedance is specified at ≥20 kHz and ESR derated for −40°C operation.
Can LP3874EMP-2.5/NOPB be used in automotive applications requiring AEC-Q100 qualification?
No - LP3874EMP-2.5/NOPB is not AEC-Q100 qualified. It is rated for −40°C to +125°C junction temperature and meets industrial reliability standards, but lacks automotive-grade stress testing, failure-in-time (FIT) reporting, and PPAP documentation. For automotive use, consider TI's AEC-Q100 qualified alternatives like TPS7B87xx or TPS7B77xx series, which offer similar 2.5-V outputs with extended qualification.
LP3874EMP-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-5, TO-261AB
- Packaging:
- Tape & Reel (TR)
- 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):
- 9 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-5
LP3874EMP-2.5/NOPB FAQ
1.How can I place an order for LP3874EMP-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3874EMP-2.5/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP3874EMP-2.5/NOPB reliable?
The price and inventory of LP3874EMP-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3874EMP-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP3874EMP-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3874EMP-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3874EMP-2.5/NOPB?
LP3874EMP-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3874EMP-2.5/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP3874EMP-2.5/NOPB?
For technical support, including LP3874EMP-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3874EMP-2.5/NOPB requirements.
6.How does Aetrix verify that LP3874EMP-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3874EMP-2.5/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP3874EMP-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP3874EMP-2.5/NOPB?
All LP3874EMP-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3874EMP-2.5/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP3874EMP-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP3874EMP-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP3874EMP-2.5/NOPB Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
