My Inquiry
My Account
Texas Instruments LP3982IMMX-2.82
- Part No.:
- LP3982IMMX-2.82
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP3982IMMX-2.82.pdf
- Description:
- IC REG LINEAR 2.82V 300MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,841
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP3982IMMX-2.82 from Texas Instruments (formerly National Semiconductor) is a fixed-output 2.82V, 300mA micropower ultra-low-dropout CMOS linear regulator in an 8-pin MSOP package. It delivers stable low-noise power with 120mV typical dropout at full load, 90µA typical quiescent current, and 1nA shutdown current-optimized for battery-powered wireless handsets and portable information appliances.
For engineers reviewing the LP3982IMMX-2.82 datasheet, LP3982IMMX-2.82 pinout, LP3982IMMX-2.82 application, or LP3982IMMX-2.82 equivalent, key selection criteria include dropout voltage under 300mA load, RMS output noise below 40µV, ±2% output tolerance, thermal/overcurrent protection, and compatibility with 2.2µF ceramic output capacitors without external compensation.
Technical Context
The LP3982IMMX-2.82 employs a PMOS pass transistor architecture enabling ultra-low dropout and near-zero drive current consumption-unlike PNP-based LDOs. Its internal bandgap reference and error amplifier operate in closed-loop negative feedback to maintain regulation across load (100µA–300mA) and input (2.5V–6.0V) variations.
Stability is ensured via an internally generated zero that compensates for the high-frequency phase shift introduced by low-ESR ceramic capacitors (≥2.2µF). The device integrates fault detection (open-drain FAULT pin), thermal shutdown at 160°C, and current limiting-enabling robust operation in space-constrained, thermally sensitive portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.82V ±2% over temperature and load-ensures precise core voltage for DSP or RF ICs requiring tight tolerance. |
| Max Output Current | 300mA guaranteed DC output-supports moderate-power baseband processors or sensor subsystems. |
| Dropout Voltage | 120mV typical at 300mA-enables >95% battery energy utilization down to ~2.94V input before regulation loss. |
| Quiescent Current | 90µA typical at no load-minimizes standby drain in always-on keep-alive circuits. |
| Shutdown Current | 1nA typical-extends shelf life and long-term storage in battery-backed devices. |
| Output Noise | 37µV RMS (10Hz–100kHz)-meets low-noise requirements for analog signal chains and RF front-ends. |
| PSRR | 60dB typical at 1kHz-suppresses switching noise from upstream DC/DC converters. |
| Input Voltage Range | 2.5V to 6.0V-compatible with single-cell Li-ion (2.7–4.2V), Li-polymer, or dual-cell alkaline inputs. |
Pinout & Package
LP3982IMMX-2.82 is housed in an 8-pin MSOP (Micro Small Outline Package) with 0.65mm pitch, measuring 3.0mm × 3.0mm × 1.0mm. This RoHS-compliant surface-mount package supports automated assembly and offers θJA = 223°C/W (no airflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 2.5V–6.0V; requires ≥1µF ceramic input capacitor for stability. |
| 2 (GND) | Ground Reference | Common return for all internal circuitry and external bypass components. |
| 3 (FAULT) | Open-Drain Fault Indicator | Asserts low during dropout, overcurrent, or thermal shutdown; requires external pull-up resistor. |
| 4 (SHDN) | Active-Low Enable Control | Logic low (<0.4V) disables regulator and reduces IQ to 1nA; logic high (>2V) enables operation. |
| 5 (VOUT) | Regulated Output | Delivers fixed 2.82V ±2%; stable with ≥2.2µF ceramic output capacitor. |
| 6 (CC) | Noise Bypass Terminal | Connects to 33nF NPO/COG capacitor to reduce output noise; directly ties to bandgap reference node. |
| 7 (VOUT) | Secondary Output Connection | Dual VOUT pins reduce IR drop and improve load regulation in high-current PCB layouts. |
| 8 (NC) | No Connect | Internally unconnected; must remain floating-no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 120mV typical at 300mA enables operation down to 2.94V input-maximizing usable battery capacity. |
| Low-noise regulation | 37µV RMS output noise (10Hz–100kHz) supports noise-sensitive analog/RF loads without added filtering. |
| PMOS pass transistor | Eliminates base-drive current, reducing quiescent consumption versus PNP LDOs and improving light-load efficiency. |
| Internal zero compensation | Enables stable operation with 2.2µF ceramic output capacitors-reducing BOM cost and board area vs. tantalum alternatives. |
| Fault monitoring | Open-drain FAULT pin provides real-time indication of dropout, thermal shutdown, or current limit-enabling system-level diagnostics. |
| Fast startup | 120µs typical turn-on time (to 90% VOUT) supports rapid power sequencing in wake-from-sleep applications. |
Applications
| Wireless Handset Baseband | DSP Core Power |
|---|---|
Use Scenario: Powers baseband processor and audio codec in GSM/UMTS handsets operating from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.82V supply to digital baseband ICs with dynamic current demands up to 300mA. Use Value: 120mV dropout extends talk time by maintaining regulation until battery voltage drops to 2.94V; 1nA shutdown preserves charge during standby. | Use Scenario: Supplies fixed 2.82V to low-voltage DSP cores in portable media players and voice recorders. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage source ensuring minimal clock jitter and analog signal integrity during audio processing. Use Value: 37µV RMS noise and 60dB PSRR prevent audible artifacts and maintain SNR in 24-bit ADC/DAC paths. |
| Battery-Powered Medical Sensors | Portable Information Appliances |
Use Scenario: Powers ECG front-end and BLE transceiver in wearable health monitors using coin-cell or small Li-ion batteries. IC Role / Device Role / Timing Role: Micropower LDO providing stable 2.82V rail during intermittent sensing bursts and deep-sleep intervals. Use Value: 90µA quiescent current and 1nA shutdown minimize average current draw-extending operational life beyond 12 months on a CR2032 cell. | Use Scenario: Regulates power for LCD controller, touch interface, and microcontroller in handheld POS terminals and industrial data loggers. IC Role / Device Role / Timing Role: Main system LDO supporting mixed-signal loads with fast transient response and thermal fault reporting. Use Value: Dual VOUT pins and FAULT output enable reliable operation under variable load conditions and field-deployed thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8860EUB28+T | Pin- and package-compatible; identical 2.8V output (vs. LP3982IMMX-2.82's 2.82V); includes reverse-battery protection not present in LP3982IMMX-2.82. | Supports reverse-polarity input protection-critical in user-replaceable battery systems where insertion errors may occur. | Select MAX8860EUB28+T when reverse-battery protection is required; otherwise LP3982IMMX-2.82 offers lower noise (37µV vs. 45µV RMS) and tighter output tolerance (±2% vs. ±3%). |
| TLC7701QD | Higher dropout (250mV @ 300mA); higher quiescent current (120µA typ); no FAULT pin; requires minimum 10µF output capacitor. | Lacks fault reporting and ceramic-capacitor optimization-unsuitable for compact, diagnostic-capable designs. | Choose LP3982IMMX-2.82 for space-constrained, low-noise, fault-aware applications; TLC7701QD is viable only if board area and diagnostics are secondary to cost. |
Compared with MAX8860EUB28+T and TLC7701QD, LP3982IMMX-2.82 uniquely balances ultra-low dropout (120mV), sub-40µV noise, integrated fault signaling, and 2.2µF ceramic stability-making it optimal for next-generation portable electronics demanding both efficiency and reliability.
Availability
LP3982IMMX-2.82 is available at Aetrix Electronics and suitable for wireless handsets, portable medical sensors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LP3982IMMX-2.82 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 acquired National Semiconductor in 2011 and maintains its precision analog and power management portfolio. TI is a global semiconductor leader focused on analog, embedded processing, and connectivity solutions.
The LP3982IMMX-2.82 belongs to National Semiconductor's micropower LDO family, engineered specifically for battery-powered portable electronics where ultra-low quiescent current, low-noise output, and minimal dropout are critical to runtime and signal fidelity.
FAQ
What is the maximum input voltage rating for LP3982IMMX-2.82?
The absolute maximum input voltage for LP3982IMMX-2.82 is 6.5V, but the recommended operating range is 2.5V to 6.0V. Exceeding 6.5V risks permanent damage per the Absolute Maximum Ratings table. For reliable operation across temperature, maintain VIN ≤ VO + 0.5V (i.e., ≤3.32V) when regulating at 2.82V under typical conditions-though the device sustains full 300mA output up to 6.0V input.
Does LP3982IMMX-2.82 require an external noise bypass capacitor?
Yes, LP3982IMMX-2.82 requires a 33nF NPO or COG ceramic capacitor between pin 6 (CC) and ground to achieve its specified 37µV RMS output noise. Omitting this capacitor increases broadband noise by ~2×. The CC pin connects directly to the bandgap reference, so capacitor leakage must be minimized-NPO/COG types ensure <1nA leakage, preserving output accuracy.
Can LP3982IMMX-2.82 operate stably with a 1µF output capacitor?
No, LP3982IMMX-2.82 is not guaranteed stable with 1µF output capacitance. The datasheet specifies minimum 2.2µF ceramic output capacitance for stability across temperature and load. Using <2.2µF risks oscillation due to insufficient phase margin-verified in Typical Performance Characteristics plots. For space-constrained designs, X5R/X7R 2.2µF 0603 ceramics provide optimal size/noise/stability trade-off.
What is the function of the NC pin on LP3982IMMX-2.82?
Pin 8 of LP3982IMMX-2.82 is designated NC (No Connect) and is internally unconnected. It must remain electrically floating-no trace, solder, or component should attach to it. Connecting this pin may cause unpredictable behavior or damage. The NC designation is confirmed in the Connection Diagrams and Ordering Information sections of the official datasheet (DS200369).
How does the FAULT pin on LP3982IMMX-2.82 behave during thermal shutdown?
During thermal shutdown, the FAULT pin on LP3982IMMX-2.82 asserts low (≤0.25V at 2mA sink) and remains latched low until junction temperature falls below the hysteresis threshold (~150°C). This open-drain output requires an external pull-up resistor (e.g., 100kΩ to VIN) to generate a valid logic-high signal when regulation is normal. FAULT also activates during current limit and near-dropout conditions-providing comprehensive fault visibility for system monitoring.
LP3982IMMX-2.82 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.82V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 200mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 270 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LP3982IMMX-2.82 FAQ
1.How can I place an order for LP3982IMMX-2.82 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3982IMMX-2.82 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 LP3982IMMX-2.82 reliable?
The price and inventory of LP3982IMMX-2.82 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3982IMMX-2.82 is usually 5 days.
3.What payment methods are accepted for LP3982IMMX-2.82?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3982IMMX-2.82 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3982IMMX-2.82?
LP3982IMMX-2.82 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3982IMMX-2.82 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 LP3982IMMX-2.82?
For technical support, including LP3982IMMX-2.82 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3982IMMX-2.82 requirements.
6.How does Aetrix verify that LP3982IMMX-2.82 is sourced from the original manufacturer or authorized distributors?
All LP3982IMMX-2.82 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 LP3982IMMX-2.82 meets industry standards.
7.What is the process for return or replacement of LP3982IMMX-2.82?
All LP3982IMMX-2.82 units undergo pre-shipment inspection (PSI). If there is an issue with LP3982IMMX-2.82, 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 LP3982IMMX-2.82 part is unused and in its original packaging.
Return procedure for LP3982IMMX-2.82:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP3982IMMX-2.82 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 practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
