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Texas Instruments LP3875ESX-2.5/NOPB
- Part No.:
- LP3875ESX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3875ESX-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 1.5A DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:503
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Product details
Overview
LP3875ESX-2.5/NOPB from Texas Instruments is a 1.5-A ultra-low-dropout linear regulator with fixed 2.5-V output, 380-mV dropout at 1.5 A, ±1.5% output voltage accuracy, and remote sense capability for improved load regulation. It operates from 2.5 V to 7 V input and delivers stable power to microprocessor cores, DSPs, and GTL/SSTL bus terminators in space-constrained industrial and battery-powered systems.
For engineers reviewing the LP3875ESX-2.5/NOPB datasheet, LP3875ESX-2.5/NOPB pinout, LP3875ESX-2.5/NOPB application, or LP3875ESX-2.5/NOPB equivalent, key selection considerations include its SENSE pin support for remote load regulation, 10-nA shutdown quiescent current, thermal/overcurrent protection, and TO-263 (DDPAK) package suitability for high-current thermal management.
Technical Context
The LP3875ESX-2.5/NOPB uses a CMOS-based PMOS pass element enabling ultra-low dropout and load-independent quiescent current. Its internal error amplifier compares the SENSE pin voltage (not OUT) against an internal reference, allowing precise regulation at the point of load when SENSE is connected remotely.
It integrates active shutdown control via the SD pin, open-drain ERROR flag with 10% output undervoltage threshold and 5% hysteresis, and thermal shutdown that cycles the pass device during sustained overload-distinct from the LP3872, which lacks SENSE and includes ERROR as standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±1.5% at 25°C; ensures stable core supply for 2.5-V logic families without external feedback. |
| Max Output Current | 1.5-A DC continuous; supports high-current digital loads like FPGA I/O banks or DSP subsystems. |
| Dropout Voltage | 380 mV at 1.5 A; enables operation with only 2.88-V input for 2.5-V output, critical for single-cell Li-ion or low-voltage battery systems. |
| Shutdown Quiescent Current | 10 nA typical; minimizes standby battery drain in always-on IoT edge nodes or portable instrumentation. |
| Ground Pin Current | 6 mA at 1.5 A load; low and stable, reducing PCB trace heating and improving efficiency vs. bipolar LDOs. |
| Input Voltage Range | 2.5 V to 7 V; compatible with wide-input industrial rails and post-regulation from buck converters. |
| Operating Junction Temp | −40°C to 125°C; qualified for automotive under-hood and industrial control cabinet environments. |
Pinout & Package
LP3875ESX-2.5/NOPB is packaged in a 5-pin DDPAK/TO-263 (KTT) thermally enhanced surface-mount package with exposed thermal pad (10.16 mm × 8.42 mm), optimized for high-power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD | Shutdown control input | CMOS-compatible logic input; pull high via 10-kΩ resistor for normal operation; drives regulator into 10-nA shutdown state when pulled low. |
| IN | Input supply connection | Accepts 2.5–7 V; connects to upstream power source; internal parasitic diode allows reverse current up to 200 mA if OUT > IN. |
| OUT | Regulated output node | Delivers 2.5 V to local loads; must be decoupled with ≥10-µF tantalum capacitor within 1 cm for stability. |
| SENSE | Remote voltage sense input | Connects directly to load point to compensate for PCB trace IR drop; enables <0.12% load regulation error at 1.5 A over temperature. |
| GND | Power ground reference | Common return for IN, OUT, SENSE, and SD; requires low-impedance connection to thermal pad for optimal thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Sense (SENSE) | Enables regulation at point-of-load rather than at regulator output, eliminating voltage drop errors across PCB traces up to 100 mΩ. |
| Ultra-Low Dropout | 380 mV at full 1.5-A load ensures usable headroom even with aging batteries or low-headroom intermediate rails. |
| 10-nA Shutdown Mode | Reduces system standby power to nanoampere level-critical for multi-year battery life in wireless sensor nodes. |
| Integrated Protection | Thermal shutdown and short-circuit current limiting prevent damage during fault conditions without external circuitry. |
| High PSRR | 73 dB at 120 Hz (VIN = VOUT + 1 V); suppresses ripple from switching pre-regulators feeding sensitive analog or RF sections. |
Applications
| Microprocessor Core Supply | GTL/SSTL Bus Termination |
|---|---|
|
Use Scenario: Powering 2.5-V CPU core or I/O bank in embedded controllers where input rail varies between 3.0–5.5 V. IC Role / Device Role / Timing Role: Primary low-noise, fast-transient-response post-regulator delivering clean 2.5-V supply with <10-µs load-step response. Use Value: Maintains 2.5-V ±3.0% regulation across line, load, and temperature while rejecting upstream buck converter ripple via 73-dB PSRR. |
Use Scenario: Providing precision 2.5-V termination voltage for GTL+ or SSTL-2 memory interfaces on high-speed data buses. IC Role / Device Role / Timing Role: Low-output-impedance voltage source ensuring stable bus signal integrity and timing margins under dynamic load switching. Use Value: SENSE pin compensates for trace resistance, guaranteeing ≤25-mV deviation at the DRAM or ASIC termination point under 1.5-A transient load. |
| DSP Power Management | Battery-Powered Instrumentation |
|
Use Scenario: Supplying 2.5-V analog and digital domains in portable test equipment with dual-mode (active/standby) operation. IC Role / Device Role / Timing Role: Dual-role regulator: active-mode LDO with 6-mA ground current and shutdown-mode nanoampere keeper. Use Value: Enables >5-year battery life in standby via 10-nA shutdown IQ, while supporting rapid wake-up with <25-µs turn-on delay. |
Use Scenario: Regulating power for low-power sensors, ADCs, and BLE radios in field-deployed environmental monitors. IC Role / Device Role / Timing Role: Single-chip solution combining precision voltage, remote sensing, and fault monitoring (ERROR flag). Use Value: ERROR flag alerts host MCU of undervoltage events before brownout, enabling graceful shutdown or battery replacement warning. |
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 output, 29-µVRMS noise, no SENSE pin, adjustable output | Lacks remote sense; suited for low-noise analog biasing, not point-of-load digital regulation | Select when ultra-low noise (<30 µVRMS) and wide input range outweigh need for SENSE and 1.5-A current. |
| LP3879MRX-2.5 | SOT-223 package, 1.5-A, same 2.5-V output, no SENSE pin, higher 65.2°C/W θJA | Lower thermal performance; limited to <1 A continuous in typical PCB layouts without copper pour | Select only for cost-sensitive, lower-power designs where board area and thermal margin permit SOT-223 use. |
Compared with TPS7A4700RGWR and LP3879MRX-2.5, LP3875ESX-2.5/NOPB uniquely combines 1.5-A current, remote SENSE capability, and TO-263 thermal performance-making it the only choice for high-current, precision point-of-load regulation in space-constrained industrial systems.
Availability
LP3875ESX-2.5/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL/SSTL bus terminators, and battery-powered instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LP3875ESX-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management IC design and manufacturing.
The LP387x family was engineered specifically for high-current, ultra-low-dropout applications in battery-powered and thermally constrained systems-emphasizing fast transient response, remote sensing, and nanoscale shutdown efficiency.
FAQ
What is the minimum input voltage required for LP3875ESX-2.5/NOPB to regulate 2.5 V?
The minimum input voltage is 2.5 V per specification, but practical operation requires VIN ≥ VOUT + VDROPOUT. At 1.5-A load, dropout is 380 mV, so LP3875ESX-2.5/NOPB needs ≥2.88 V input to maintain regulation. Below this, output voltage drops linearly with input.
Can the SENSE pin of LP3875ESX-2.5/NOPB be left unconnected?
No. The SENSE pin must be connected either to the remote load point (for improved regulation) or directly to the OUT pin (if remote sensing is unused). Leaving it floating may cause instability or regulation failure. TI explicitly states SENSE must not be left open.
Does LP3875ESX-2.5/NOPB have built-in reverse current protection?
LP3875ESX-2.5/NOPB does not include active reverse current blocking. Its internal PMOS pass device has a body diode that conducts if OUT exceeds IN. This diode tolerates up to 200 mA DC or 1 A peak-so external protection is needed if reverse current is a system risk.
What is the recommended output capacitor for LP3875ESX-2.5/NOPB?
Tantalum capacitors are recommended: minimum 10 µF with ESR between 100 mΩ and 4 Ω. Ceramic capacitors may be used if X7R/X5R dielectric and ≥10 µF, but must meet ESR stability requirements across −40°C to 125°C to avoid oscillation.
How does the ERROR flag on LP3875ESX-2.5/NOPB behave during shutdown?
When the SD pin is pulled low, the ERROR flag is forced invalid (high-impedance) to conserve power. It resumes normal operation-asserting low when output drops >10% below 2.5 V-only after SD returns high and the regulator exits shutdown mode.
LP3875ESX-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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):
- 0.55V @ 1.5A
- Current - Output:
- 1.5A
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LP3875ESX-2.5/NOPB FAQ
1.How can I place an order for LP3875ESX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3875ESX-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 LP3875ESX-2.5/NOPB reliable?
The price and inventory of LP3875ESX-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 LP3875ESX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP3875ESX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3875ESX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3875ESX-2.5/NOPB?
LP3875ESX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3875ESX-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 LP3875ESX-2.5/NOPB?
For technical support, including LP3875ESX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3875ESX-2.5/NOPB requirements.
6.How does Aetrix verify that LP3875ESX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3875ESX-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 LP3875ESX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP3875ESX-2.5/NOPB?
All LP3875ESX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3875ESX-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 LP3875ESX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP3875ESX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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