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Texas Instruments LP3882ESX-1.2/NOPB
- Part No.:
- LP3882ESX-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3882ESX-1.2/NOPB.pdf
- Description:
- IC REG LINEAR 1.2V 1.5A DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:157
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Product details
Overview
LP3882ESX-1.2/NOPB from Texas Instruments is a 1.5A ultra-low-dropout linear regulator in DDPAK/TO-263-5 package, delivering fixed 1.2V output with 1.5% accuracy at 25°C, 110 mV typical dropout at 1.5A, and 60 nA shutdown current - designed for post-regulation in high-efficiency server I/O and DSP core supplies.
For engineers reviewing the LP3882ESX-1.2/NOPB datasheet, LP3882ESX-1.2/NOPB pinout, LP3882ESX-1.2/NOPB application, or LP3882ESX-1.2/NOPB equivalent, key selection criteria include bias rail dependency (4.5–6V VBIAS), ground current vs. load behavior, thermal performance on PCB copper planes, and compatibility with tantalum-only output capacitance ≥4.7 µF.
Technical Context
The LP3882ESX-1.2/NOPB uses an N-MOS pass transistor driven by an external VBIAS rail, enabling operation with input voltages as low as (VOUT + VDO) while maintaining fast transient response and minimal quiescent current across load range. Its CMOS architecture yields 3 mA typical ground current at full load and 60 nA in shutdown.
Stability requires ≥4.7 µF output capacitance with ESR in defined range (tantalum recommended); ceramic capacitors are prohibited on the output due to phase-margin risk. The device integrates over-temperature and over-current protection, and features a dedicated S/D pin with 0.7 V turn-off threshold and 20 µs turn-off delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1.5% at 25°C - ensures stable core supply for low-voltage DSPs and microcontrollers without external feedback. |
| Dropout Voltage | 110 mV typ at 1.5 A (DDPAK/TO-263) - enables regulation from 1.31 V input, critical for battery-backed or SMPS post-regulator applications. |
| Quiescent Current | 60 nA typ in shutdown; 3 mA typ from VIN at full load - minimizes standby power loss and maintains efficiency across light-to-heavy loads. |
| Load Regulation | 0.04%/A - limits output deviation to ≤60 µV per 100 mA load change, supporting precision analog and digital core rails. |
| PSRR | 80 dB at 120 Hz (VIN ripple rejection) - suppresses switching noise from upstream DC/DC converters in mixed-signal systems. |
| Operating Temp | −40°C to +125°C junction - qualified for industrial and embedded computing environments with sustained thermal stress. |
| Thermal Resistance | θJA ≈ 40°C/W when soldered to ≥1.5 in² copper plane - defines heatsinking requirement for continuous 1.5 A operation at elevated ambient temperatures. |
Pinout & Package
LP3882ESX-1.2/NOPB is housed in a 5-pin DDPAK/TO-263 package (KTT drawing) with exposed thermal pad soldered to PCB copper for enhanced heat dissipation. Pin 1 is identified by notch or marking "LP3882ES-1.2" on top surface; orientation follows Q2 quadrant in tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Main power input | Supplies current to load; must be ≥(VOUT + VDO) and ≤5.5 V; requires ≥4.7 µF ceramic input capacitor. |
| 2 - GND | Ground reference | Common return for VIN, VBIAS, and S/D; connects to thermal pad; must tie to low-impedance analog ground plane. |
| 3 - S/D | Shutdown control | Active-low enable: <0.3 V disables regulator; >1.3 V enables; requires pull-up resistor (10–100 kΩ) if driven by open-drain source. |
| 4 - VBIAS | Bias rail input | Provides gate drive for N-MOS pass element; must be 4.5–6 V; monitored for UVLO; requires 0.1 µF decoupling capacitor. |
| 5 - VOUT | Regulated output | Delivers 1.2 V to load; requires ≥4.7 µF tantalum output capacitor with ESR in stable region; no ceramic bypass allowed directly on pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 110 mV at 1.5 A enables use with sub-1.5 V input sources - essential for extending battery life and minimizing heat in compact systems. |
| External VBIAS architecture | Separates gate-drive path from power path, allowing VIN to operate near VOUT while maintaining full bandwidth and stability. |
| Low ground current | 3 mA at full load (vs. >10 mA in bipolar LDOs) reduces total system power loss and simplifies thermal design in dense layouts. |
| Integrated protection | Thermal shutdown and current limiting prevent damage during overload or poor heatsinking - eliminates need for external fault management circuitry. |
| High PSRR at low frequency | 80 dB @ 120 Hz rejects ripple from AC/DC adapters and buck converter switching artifacts before they reach sensitive loads. |
Applications
| Server Core and I/O Supplies | DSP Power Supplies |
|---|---|
Use Scenario: Regulating 1.2 V core voltage for multi-core x86 or ARM processors in rack-mounted servers. IC Role / Device Role / Timing Role: Post-regulator following a primary 3.3 V or 5 V DC/DC converter, providing clean, low-noise supply with fast transient response to CPU load steps. Use Value: 110 mV dropout allows operation from intermediate bus voltages as low as 1.31 V, improving overall system efficiency and reducing thermal load on VRMs. |
Use Scenario: Powering TI C6000 or Analog Devices SHARC DSPs requiring tightly regulated 1.2 V core rails. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to DSP BGA package, minimizing IR drop and noise coupling. Use Value: 0.04%/A load regulation ensures <±60 µV output shift across full 0–1.5 A dynamic load range, preserving signal integrity in high-speed ADC/DAC interfaces. |
| PC Add-in-Cards | SMPS Post-Regulators |
Use Scenario: Delivering 1.2 V to FPGA or ASIC on PCIe expansion cards with strict space and thermal constraints. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO mounted directly on card edge, leveraging PCB copper as heatsink via DDPAK thermal pad. Use Value: θJA ≈ 40°C/W with ≥1.5 in² copper enables 1.5 A continuous output without external heatsink - reducing BOM count and board area. |
Use Scenario: Final-stage regulation after a high-efficiency buck converter in telecom or industrial power modules. IC Role / Device Role / Timing Role: Ripple-scrubbing filter that removes residual switching noise and improves PSRR beyond what the primary converter achieves. Use Value: 80 dB PSRR at 120 Hz attenuates low-frequency switching artifacts, meeting stringent noise requirements for RF front-ends and precision analog subsystems. |
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 |
|---|---|---|---|
| TPS7A8300RGRT | 1.5A, 1.2V fixed, 75 mV dropout (typ), 2.2 µA quiescent current in active mode, no VBIAS pin - uses internal charge pump. | Eliminates external VBIAS rail but has higher active IQ; better suited for always-on systems where shutdown current is less critical than operating IQ. | Select TPS7A8300RGRT when board space prohibits dual-rail routing and 2.2 µA active IQ is acceptable; avoid if VBIAS reuse from existing 5 V rail is preferred. |
| LP3982MMX-1.2/NOPB | 300 mA, 1.2V fixed, 120 mV dropout (typ), 85 µA quiescent current, SO-8 package - lower current, no VBIAS dependency. | Targeted at low-power microcontrollers and sensors; lacks thermal capability and current rating for 1.5 A loads. | Choose LP3982MMX-1.2/NOPB only for <300 mA applications where DDPAK footprint and thermal design are unnecessary; not a functional replacement for LP3882ESX-1.2/NOPB. |
Compared with TPS7A8300RGRT and LP3982MMX-1.2/NOPB, the LP3882ESX-1.2/NOPB uniquely balances 1.5 A delivery, ultra-low dropout, and external VBIAS flexibility - making it optimal for high-current, thermally constrained post-regulation where bias rail sharing is feasible and shutdown IQ is critical.
Availability
LP3882ESX-1.2/NOPB is available at Aetrix Electronics and suitable for server power delivery, DSP core supplies, PC add-in-card designs, and SMPS post-regulation requiring stable component supply, long-lifecycle support, and RoHS-exempt compliance for industrial deployment.
Supply support for LP3882ESX-1.2/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 ICs, with decades of expertise in high-reliability linear regulators and power solutions.
The LP3882 series was developed specifically for high-current, low-noise post-regulation in computing and communications infrastructure - emphasizing ultra-low dropout, fast transient response, and robust thermal performance in surface-mount packages.
FAQ
What is the minimum input voltage required for LP3882ESX-1.2/NOPB to regulate 1.2 V output?
The LP3882ESX-1.2/NOPB requires VIN ≥ (VOUT + VDO). With 110 mV typical dropout at 1.5 A in the DDPAK package, the minimum functional VIN is 1.31 V. However, per recommended operating conditions, VIN must be ≥ (VOUT + VDO) and ≤5.5 V - and VBIAS must be independently supplied at 4.5–6 V for proper gate drive.
Can ceramic capacitors be used on the output of LP3882ESX-1.2/NOPB?
No - ceramic capacitors are explicitly prohibited on the VOUT pin of LP3882ESX-1.2/NOPB due to their ultra-low ESR (<10 mΩ), which causes phase-margin loss and potential oscillation. Only tantalum capacitors ≥4.7 µF (with ESR in the stable region per Figure 20) are permitted; aluminum electrolytics are discouraged below 10°C.
What is the purpose of the VBIAS pin on LP3882ESX-1.2/NOPB, and what happens if it's unconnected?
The VBIAS pin supplies gate drive voltage to the N-MOS pass transistor. If left unconnected or below 4 V, the under-voltage lockout circuit prevents regulator turn-on. VBIAS must be actively held between 4.5 V and 6 V using a stable external rail and 0.1 µF local decoupling capacitor for reliable operation.
How does the thermal performance of LP3882ESX-1.2/NOPB compare across package types?
The LP3882ESX-1.2/NOPB in DDPAK/TO-263 achieves θJA ≈ 40°C/W when soldered to ≥1.5 in² copper - significantly better than the SO PowerPad (θJA ≈ 166°C/W) and comparable to TO-220 with heatsink. This makes it ideal for high-power density applications where PCB copper serves as primary heatsink.
Does LP3882ESX-1.2/NOPB support adjustable output voltage configurations?
No - LP3882ESX-1.2/NOPB is a fixed-output device delivering precisely 1.2 V. The LP3882 family includes fixed versions only (e.g., 1.2 V, 1.5 V, 1.8 V); no adjustable variant exists. Output voltage tolerance is ±1.5% at 25°C and widens to ±2.2% across −40°C to +125°C per electrical characteristics table.
LP3882ESX-1.2/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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 30 µA
- Current - Supply (Max):
- 8 mA
- PSRR:
- 80dB ~ 65dB (120Hz ~ 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:
- TO-263 (DDPAK-5)
LP3882ESX-1.2/NOPB FAQ
1.How can I place an order for LP3882ESX-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3882ESX-1.2/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 LP3882ESX-1.2/NOPB reliable?
The price and inventory of LP3882ESX-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3882ESX-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LP3882ESX-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3882ESX-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3882ESX-1.2/NOPB?
LP3882ESX-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3882ESX-1.2/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 LP3882ESX-1.2/NOPB?
For technical support, including LP3882ESX-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3882ESX-1.2/NOPB requirements.
6.How does Aetrix verify that LP3882ESX-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3882ESX-1.2/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 LP3882ESX-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LP3882ESX-1.2/NOPB?
All LP3882ESX-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3882ESX-1.2/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 LP3882ESX-1.2/NOPB part is unused and in its original packaging.
Return procedure for LP3882ESX-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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