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Texas Instruments LP3984ITP-2.9/NOPB
- Part No.:
- LP3984ITP-2.9/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 4-UFBGA, DSBGA
- Datasheet:
-
LP3984ITP-2.9/NOPB.pdf
- Description:
- IC REG LINEAR 2.9V 150MA 4DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,788
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Product details
Overview
LP3984ITP-2.9/NOPB from Texas Instruments (formerly National Semiconductor) is a micropower, ultra low-dropout CMOS voltage regulator delivering 2.9V at up to 150mA from 2.5V–6.0V input. It features 75mV typical dropout at full load, ≤1.2µA shutdown current, and 20µs turn-on time-optimized for space-constrained battery-powered wireless handsets.
For engineers reviewing the LP3984ITP-2.9/NOPB datasheet, LP3984ITP-2.9/NOPB pinout, LP3984ITP-2.9/NOPB application, or LP3984ITP-2.9/NOPB equivalent, key selection criteria include its micro SMD package footprint, logic-controlled enable interface, stable operation with 1µF tantalum output capacitor, and guaranteed −40°C to +125°C junction temperature range.
Technical Context
The LP3984ITP-2.9/NOPB employs a CMOS pass element architecture enabling ultra-low quiescent current and minimal dropout voltage across load and input voltage variations. Its internal bandgap reference and error amplifier maintain ±2.0% output voltage tolerance over temperature and line/load conditions.
It integrates thermal shutdown (160°C trip) and short-circuit current limiting (600mA steady-state), with PSRR exceeding 60dB at 1kHz and 40dB at 10kHz-critical for RF-sensitive portable applications where supply noise coupling must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.9V ±2.0% - tightly regulated nominal rail for baseband processors or RF ICs requiring stable low-noise supply |
| Input Voltage Range | 2.5V to 6.0V - supports single-cell Li-ion (2.7–4.2V), dual-cell alkaline, or USB-powered systems |
| Max Output Current | 150mA - sufficient for modem subsystems, Bluetooth radios, or sensor hubs in handheld devices |
| Dropout Voltage | 75mV typ. @ 150mA - enables regulation down to ~2.975V input, extending usable battery life near end-of-discharge |
| Quiescent Current | 80–125µA active / ≤1.2µA shutdown - minimizes standby drain in always-on circuits like keep-alive RAM |
| PSRR | 60dB @ 1kHz, 40dB @ 10kHz - suppresses switching noise from PMICs or DC/DC converters feeding adjacent rails |
| Turn-On Time | 20µs typ. - enables rapid power sequencing in wake-from-sleep scenarios without system latency |
| Operating Temp | −40°C to +125°C - qualified for automotive infotainment modules and industrial handheld terminals |
Pinout & Package
LP3984ITP-2.9/NOPB uses a 4-bump micro SMD package (NS package code TPA04EJA), 0.500mm height, footprint 0.879mm × 0.980mm. Pin numbering follows JEDEC standard: A2=VEN, A1=GND, B1=VOUT, B2=VIN; no connection on SOT-23 pin 4 is omitted in micro SMD layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VEN (A2) | Logic Enable Input | Active-high control: ≥1.4V enables regulator; ≤0.4V disables output and reduces IQ to ≤1.2µA |
| GND (A1) | Power Ground | Common return path for input, output, and bias currents; requires low-impedance PCB plane |
| VOUT (B1) | Regulated Output | Delivers stable 2.9V to load; requires 1–22µF tantalum capacitor with 2–10Ω ESR for stability |
| VIN (B2) | Input Supply | Accepts 2.5–6.0V; requires ≥1µF input capacitor placed within 1cm of pin and connected to clean analog ground |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 80–125µA active IQ enables >1-year battery life in low-duty-cycle IoT sensors |
| Ultra-Low Dropout | 75mV typical at 150mA allows use with deeply discharged Li-ion cells (≥2.975V input) |
| Fast Enable Response | 20µs turn-on time supports dynamic power gating in multi-mode cellular basebands |
| Tantalum-Capacitor Optimized | Stable with 1µF tantalum output cap-reduces board area vs. ceramic alternatives needing larger values |
| Integrated Protection | Thermal shutdown (160°C) and 600mA short-circuit limit prevent damage during fault conditions |
| Wide Temperature Range | −40°C to +125°C operation supports deployment in automotive cabin modules and outdoor industrial gear |
Applications
| CDMA Handset Power Rail | GSM Baseband Supply |
|---|---|
Use Scenario: Powers CDMA transceiver ICs and analog front-end circuitry in compact mobile handsets. IC Role / Device Role / Timing Role: Primary LDO supplying clean 2.9V to RF synthesizer and PA driver stages. Use Value: 60dB PSRR at 1kHz prevents switching noise from PMICs from degrading EVM and ACLR performance. | Use Scenario: Provides regulated 2.9V to GSM baseband processor core and memory interfaces. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling high-speed digital logic from noisy system rails. Use Value: 20µs turn-on enables synchronized wake-up with BB processor clock domain, eliminating boot delays. |
| Portable Medical Monitor | Industrial Handheld Terminal |
Use Scenario: Supplies 2.9V to ADC front-end and low-power MCU in battery-operated patient monitors. IC Role / Device Role / Timing Role: Micropower LDO maintaining sensor signal integrity during extended standby periods. Use Value: ≤1.2µA shutdown current extends 2xAA alkaline battery life beyond 2 years in sleep mode. | Use Scenario: Powers 2.9V logic rails in ruggedized warehouse scanners operating in wide ambient temperatures. IC Role / Device Role / Timing Role: High-reliability LDO supporting operation from −40°C to +125°C junction temperature. Use Value: Guaranteed 150mA output at 125°C enables continuous barcode scanning in hot factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F29DBVR | 200mA output, 50mV dropout @ 150mA, 2.5µA IQ in shutdown, SOT-23-5 only | Higher output current and lower dropout; lacks micro SMD option and 1µF tantalum stability guarantee | Choose for higher load margin or lower dropout; avoid if board space or tantalum capacitor compatibility is critical |
| MCP1700T-2902E/TT | 250mA output, 178mV dropout @ 250mA, 1.6µA IQ, SOT-23-3 (no enable) | No enable pin; higher dropout limits usable input range; wider temp range (−40°C to +125°C same) | Choose for cost-sensitive designs without enable control; avoid when fast sequencing or ultra-low dropout is required |
Compared with LP3984ITP-2.9/NOPB, TPL720F29DBVR offers superior dropout and current but sacrifices micro SMD packaging and tantalum-cap stability, while MCP1700T-2902E/TT eliminates enable functionality and increases dropout-making LP3984ITP-2.9/NOPB optimal for space-constrained, enable-driven, low-noise portable systems.
Availability
LP3984ITP-2.9/NOPB is available at Aetrix Electronics and suitable for CDMA/GSM handset design, portable medical instrumentation, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP3984ITP-2.9/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 specializing in analog and embedded processing solutions, with legacy expertise in precision power management ICs dating to National Semiconductor's acquisition in 2011.
The LP3984ITP-2.9/NOPB belongs to TI's ultra-low-IQ LDO portfolio designed specifically for battery-powered portable electronics-emphasizing micropower efficiency, miniature packaging, and RF-noise immunity in space- and power-constrained wireless platforms.
FAQ
What is the maximum input voltage rating for LP3984ITP-2.9/NOPB?
The absolute maximum input voltage for LP3984ITP-2.9/NOPB is 6.5V, but the recommended operating range is 2.5V to 6.0V per the datasheet. Exceeding 6.0V risks violating safe operating area limits, especially at elevated temperatures, and may trigger thermal shutdown or degrade long-term reliability. Always maintain VIN ≤6.0V in normal operation to ensure compliance with specified electrical characteristics and lifetime performance of LP3984ITP-2.9/NOPB.
Does LP3984ITP-2.9/NOPB require an external bypass capacitor?
LP3984ITP-2.9/NOPB does not require an external bypass capacitor for basic regulation, but a noise-reduction capacitor on the BYP pin (if present in variant) improves PSRR and output noise. The LP3984ITP-2.9/NOPB micro SMD variant has no dedicated BYP pin-its noise performance relies on proper 1µF tantalum output capacitance and layout. Therefore, no separate bypass cap is needed for LP3984ITP-2.9/NOPB; stability and noise suppression are achieved via the specified output capacitor and PCB grounding.
Can LP3984ITP-2.9/NOPB operate with ceramic output capacitors?
LP3984ITP-2.9/NOPB is explicitly characterized and guaranteed stable with 1–22µF tantalum capacitors having 2–10Ω ESR. While some ceramic capacitors may function in lab prototypes, the datasheet does not validate stability with low-ESR ceramics, and oscillation or poor transient response can occur. For production use, LP3984ITP-2.9/NOPB must be paired with a tantalum output capacitor meeting the specified ESR range to ensure reliable regulation under all load and temperature conditions.
What is the thermal resistance (θJA) of LP3984ITP-2.9/NOPB in its micro SMD package?
The junction-to-ambient thermal resistance (θJA) for LP3984ITP-2.9/NOPB in the 4-bump micro SMD package (TPA04EJA) is 340°C/W, as specified in the Operating Ratings table. This value assumes standard JEDEC test board conditions (2-layer board, 1-in² copper). Actual θJA in end equipment depends on PCB copper area, airflow, and nearby heat sources-designers should verify junction temperature using TJ = TA + (θJA × PD) and ensure it remains ≤125°C under worst-case load and ambient conditions for LP3984ITP-2.9/NOPB.
Is LP3984ITP-2.9/NOPB RoHS compliant and lead-free?
Yes, LP3984ITP-2.9/NOPB is RoHS compliant and lead-free. The "/NOPB" suffix explicitly denotes lead-free (Pb-free) packaging per JEDEC J-STD-609, and TI certifies compliance with EU RoHS Directive 2011/65/EU and related restrictions on hazardous substances. The device uses matte tin lead finish and meets TI's Banned Substances Specification (CSP-9-111S2), making LP3984ITP-2.9/NOPB suitable for environmentally regulated commercial and industrial applications.
LP3984ITP-2.9/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-UFBGA, DSBGA
- 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):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- 150 µA
- PSRR:
- 60dB ~ 40dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DSBGA
LP3984ITP-2.9/NOPB FAQ
1.How can I place an order for LP3984ITP-2.9/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3984ITP-2.9/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 LP3984ITP-2.9/NOPB reliable?
The price and inventory of LP3984ITP-2.9/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3984ITP-2.9/NOPB is usually 5 days.
3.What payment methods are accepted for LP3984ITP-2.9/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3984ITP-2.9/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3984ITP-2.9/NOPB?
LP3984ITP-2.9/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3984ITP-2.9/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 LP3984ITP-2.9/NOPB?
For technical support, including LP3984ITP-2.9/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3984ITP-2.9/NOPB requirements.
6.How does Aetrix verify that LP3984ITP-2.9/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3984ITP-2.9/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 LP3984ITP-2.9/NOPB meets industry standards.
7.What is the process for return or replacement of LP3984ITP-2.9/NOPB?
All LP3984ITP-2.9/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3984ITP-2.9/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 LP3984ITP-2.9/NOPB part is unused and in its original packaging.
Return procedure for LP3984ITP-2.9/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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