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Texas Instruments LP3879MRX-1.0/NOPB
- Part No.:
- LP3879MRX-1.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP3879MRX-1.0/NOPB.pdf
- Description:
- IC REG LIN 1V 800MA 8SO POWERPAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
LP3879MRX-1.0/NOPB from Texas Instruments is a micropower, low-noise, fixed 1.00 V LDO voltage regulator delivering up to 800 mA output current with 1% initial accuracy, 18 µVRMS broadband noise (100 Hz–100 kHz), and operation from 2.5 V to 6 V input. It employs a VIP PNP pass element, supports remote sense for improved load regulation, and is optimized for ceramic-capacitor stability in low-voltage ASIC, FPGA, and DSP power supplies.
For engineers reviewing the LP3879MRX-1.0/NOPB datasheet, LP3879MRX-1.0/NOPB pinout, LP3879MRX-1.0/NOPB application, or LP3879MRX-1.0/NOPB equivalent, key selection criteria include its 1.0 V fixed output, SO PowerPad thermal performance, shutdown quiescent current <10 µA, ground pin current of 5.5 mA at full load, and compatibility with ultra-low-ESR ceramic output capacitors ≥10 µF.
Technical Context
The LP3879MRX-1.0/NOPB uses a vertically integrated PNP (VIP) process enabling high peak current capability (1200 mA), low dropout behavior, and stable operation with ceramic output capacitors as low as 10 µF and ESR down to ~5 mΩ. Its internal architecture includes a precision bandgap reference, error amplifier, and dedicated BYPASS pin for noise filtering via a 10 nF capacitor.
It features active remote SENSE functionality (Pin 6) to compensate for PCB trace IR drop, a logic-level SHUTDOWN input (Pin 8) with 1.4 V turn-on threshold, and over-temperature/over-current protection. The device operates across –40°C to +125°C junction temperature and requires no external compensation due to its ceramic-stable design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.00 V ±1% at 25°C; ensures precise core voltage for 1.0 V logic domains in FPGAs and ASICs. |
| Max Output Current | 800 mA continuous; supports high-current digital loads without thermal derating under typical PCB layout. |
| Input Voltage Range | 2.5 V to 6 V; enables direct regulation from common intermediate rails (e.g., 3.3 V, 5 V). |
| Output Noise | 18 µVRMS (100 Hz–100 kHz, 10 nF BYPASS); meets stringent noise requirements for analog-sensitive mixed-signal SoCs. |
| Ground Pin Current | 5.5 mA at 800 mA load; low quiescent loss improves efficiency in battery-powered or always-on systems. |
| Shutdown Current | <10 µA; enables deep sleep mode in portable instrumentation and medical devices. |
| Load Regulation | ±0.032%/V line regulation; tight control maintains output stability during input rail fluctuations. |
| Junction Temp Range | –40°C to +125°C; qualified for industrial and automotive under-hood auxiliary power applications. |
Pinout & Package
LP3879MRX-1.0/NOPB is housed in an 8-pin SO PowerPad (DDA) package with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (θJ−A ≈ 60°C/W on 4-layer board). The package measures 4.9 mm × 3.9 mm × 1.7 mm and is RoHS-compliant with Sn lead finish and MSL Level-3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BYPASS | Noise filter node | Connects to 10 nF capacitor to ground; reduces output noise by >20 dB and ensures loop stability. |
| 2 - N/C | No internal connection | Must remain unconnected; used only for post-package test. |
| 3 - GROUND | Analog and power ground reference | Primary return path for regulator circuitry; tied to thermal pad for thermal and electrical integrity. |
| 4 - INPUT | Unregulated input supply | Accepts 2.5–6 V; requires ≥4.7 µF ceramic input capacitor placed within 12.7 mm of pin. |
| 5 - OUTPUT | Regulated 1.00 V output | Delivers up to 800 mA; requires ≥10 µF ceramic output capacitor with ESR 5–25 mΩ for stability. |
| 6 - SENSE | Remote voltage sensing | Connect directly to load point to compensate for PCB trace resistance; improves load regulation to ±0.5%. |
| 7 - N/C | No internal connection | Must remain unconnected; no internal bond wire or circuitry. |
| 8 - SHUTDOWN | Enable/disable control | Pull ≥1.4 V to enable; pull ≤0.5 V to disable output and reduce IQ to <10 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic capacitor stability | Guaranteed stable with ≥10 µF X5R/X7R ceramic output caps; eliminates need for tantalum or electrolytic alternatives. |
| Ultra-low output noise | 18 µVRMS broadband noise enables clean power for RF transceivers and high-resolution ADCs. |
| Remote SENSE capability | Compensates for up to 100 mV IR drop between regulator and load, maintaining ±0.5% regulation at point-of-load. |
| Low ground pin current | 5.5 mA at full 800 mA load minimizes wasted power in high-efficiency systems. |
| Thermal-enhanced SO PowerPad | Exposed die attach pad lowers θJ−A to ~60°C/W, supporting 800 mA continuous operation without heatsink. |
| Integrated protection | Auto-recovering over-temperature and over-current shutdown prevent damage during fault conditions. |
Applications
| ASIC Power Supplies | DSP/FPGA Core Power |
|---|---|
Use Scenario: Powering 1.0 V I/O or core rails in desktop GPU VRMs and notebook chipset PMICs. IC Role / Device Role / Timing Role: Primary low-noise post-regulator stepping down from 3.3 V or 5 V intermediate bus. Use Value: 1% output accuracy and 18 µV noise ensure signal integrity and timing margin compliance in high-speed SerDes interfaces. | Use Scenario: Supplying configurable logic and memory interfaces in Xilinx Artix or Intel Cyclone FPGAs. IC Role / Device Role / Timing Role: Dedicated 1.0 V LDO for FPGA core voltage with remote SENSE to counteract board-level IR drop. Use Value: Stable 800 mA delivery with ±0.5% load regulation preserves setup/hold timing across temperature and load transients. |
| SMPS Post-Regulator | Medical Instrumentation |
Use Scenario: Low-noise cleanup stage after buck converter in ultrasound front-end or patient monitor power tree. IC Role / Device Role / Timing Role: Final-stage regulator suppressing switching ripple and harmonics from upstream DC/DC. Use Value: 60 dB ripple rejection at 1 kHz and 18 µV RMS noise meet IEC 60601-1 EMI immunity requirements. | Use Scenario: Powering low-power microcontrollers and analog sensor signal chains in portable ECG or pulse oximeters. IC Role / Device Role / Timing Role: Always-on 1.0 V supply with <10 µA shutdown current extending battery life in standby mode. Use Value: Ultra-low quiescent current and –40°C to +125°C operation support long-duration field deployments and sterilization cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | 7-channel 100 mA sink driver with integrated LDO; not a single-output 800 mA regulator. | Designed for LED/relay driving, not precision point-of-load regulation. | Select LP3879MRX-1.0/NOPB for high-current, low-noise 1.0 V regulation; TPL7407LPGEDR only suits multi-load sinking with lower current per channel. |
| TPS7A20105PDBVR | 1.05 V fixed output (50 mV higher), 300 mA max, 6.5 µVRMS noise, WSON-6 package. | Limited current and different output voltage; lacks SENSE pin and PowerPad thermal capability. | Choose LP3879MRX-1.0/NOPB when 800 mA, remote sense, or SO PowerPad thermal performance is required; TPS7A20105PDBVR fits space-constrained, lower-current designs. |
Compared with TPL7407LPGEDR and TPS7A20105PDBVR, LP3879MRX-1.0/NOPB uniquely delivers 800 mA at precisely 1.00 V with remote sense, ceramic stability, and SO PowerPad thermal management-making it irreplaceable for high-performance 1.0 V digital core rails where current, accuracy, and noise are critical.
Availability
LP3879MRX-1.0/NOPB is available at Aetrix Electronics and suitable for ASIC power supplies, FPGA core regulation, SMPS post-regulation, medical instrumentation, and industrial embedded systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP3879MRX-1.0/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 power management technologies with over 50 years of innovation in high-reliability silicon design.
The LP3879MRX-1.0/NOPB belongs to TI's micropower LDO family engineered for ultra-low-noise, ceramic-stable regulation in sub-1.2 V digital power domains-including ASIC, FPGA, and DSP core supplies where precision, efficiency, and thermal robustness are essential.
FAQ
What is the output voltage tolerance of LP3879MRX-1.0/NOPB over temperature?
LP3879MRX-1.0/NOPB guarantees ±1% output voltage accuracy at 25°C, and maintains ±3% over the full –40°C to +125°C junction temperature range per the datasheet's boldface limits. This ensures reliable 1.00 V operation in industrial and automotive environments without external trimming.
Can LP3879MRX-1.0/NOPB be used without the BYPASS capacitor?
No-LP3879MRX-1.0/NOPB requires a 10 nF capacitor between BYPASS (Pin 1) and GROUND for both loop stability and noise reduction. Omitting it risks oscillation and increases output noise to >50 µVRMS, violating the device's specified performance.
What is the minimum input voltage required for LP3879MRX-1.0/NOPB to maintain regulation at 800 mA?
LP3879MRX-1.0/NOPB requires a minimum input voltage of 2.5 V to sustain 1.00 V output regulation at 800 mA load across 0°C to 125°C. Below this, dropout behavior occurs and VOUT drops linearly with VIN.
Does LP3879MRX-1.0/NOPB support remote sensing, and how is it implemented?
Yes-LP3879MRX-1.0/NOPB supports remote sensing via Pin 6 (SENSE). To use it, connect SENSE directly to the load's VCC pin instead of the regulator's OUTPUT pin, compensating for PCB trace resistance and improving load regulation to ±0.5%.
Is LP3879MRX-1.0/NOPB pin-compatible with other variants in the LP3879 family?
Yes-LP3879MRX-1.0/NOPB shares identical 8-pin SO PowerPad (DDA) pinout and footprint with LP3879MRX-1.2/NOPB and LP3879MR-1.0/NOPB. Only the output voltage and packaging (tape-and-reel vs. tube) differ; no PCB redesign is needed when substituting within the same package variant.
LP3879MRX-1.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 800mA
- Current - Quiescent (Iq):
- 1.4 mA
- Current - Supply (Max):
- 2.2 mA
- PSRR:
- 60dB (1kHz)
- 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:
- 8-SO PowerPad
LP3879MRX-1.0/NOPB FAQ
1.How can I place an order for LP3879MRX-1.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3879MRX-1.0/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 LP3879MRX-1.0/NOPB reliable?
The price and inventory of LP3879MRX-1.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3879MRX-1.0/NOPB is usually 5 days.
3.What payment methods are accepted for LP3879MRX-1.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3879MRX-1.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3879MRX-1.0/NOPB?
LP3879MRX-1.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3879MRX-1.0/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 LP3879MRX-1.0/NOPB?
For technical support, including LP3879MRX-1.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3879MRX-1.0/NOPB requirements.
6.How does Aetrix verify that LP3879MRX-1.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3879MRX-1.0/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 LP3879MRX-1.0/NOPB meets industry standards.
7.What is the process for return or replacement of LP3879MRX-1.0/NOPB?
All LP3879MRX-1.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3879MRX-1.0/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 LP3879MRX-1.0/NOPB part is unused and in its original packaging.
Return procedure for LP3879MRX-1.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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