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Texas Instruments LP3999ITL-2.8/NOPB
- Part No.:
- LP3999ITL-2.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP3999ITL-2.8/NOPB.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
LP3999ITL-2.8/NOPB from Texas Instruments is a low-noise, 150mA fixed-output LDO voltage regulator in a 5-pin DSBGA package, delivering 2.8V ±2% output with 60mV typical dropout at full load, 10µVrms output noise (10Hz–100kHz), and logic-controlled enable for RF/analog power domains in portable wireless devices.
For engineers reviewing the LP3999ITL-2.8/NOPB datasheet, LP3999ITL-2.8/NOPB pinout, LP3999ITL-2.8/NOPB application, or LP3999ITL-2.8/NOPB equivalent, key selection criteria include ceramic-capacitor stability (1µF COUT), fast 140µs turn-on time, thermal/short-circuit protection, and −40°C to +125°C junction temperature operation in space-constrained RF subsystems.
Technical Context
The LP3999ITL-2.8/NOPB employs a bandgap-referenced PMOS pass transistor architecture optimized for ultra-low noise and minimal quiescent current. Its internal bypass node (CBYPASS) accepts a 0.01µF capacitor to suppress reference noise without degrading transient response.
Enable control is active-high with VIH = 0.9V and VIL = 0.4V, supporting direct GPIO interfacing. The regulator maintains regulation with zero load and remains stable across input voltages from 2.5V to 6.0V while delivering up to 150mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±2% (±56mV) over −40°C to +125°C junction temp - ensures stable bias for RF transceivers and analog sensors |
| Input Voltage Range | 2.5V to 6.0V - compatible with single-cell Li-ion (3.0–4.2V), dual-cell alkaline, or regulated intermediate rails |
| Dropout Voltage | 60mV typical at 150mA load - maximizes battery runtime by extending usable discharge range |
| Output Noise | 10µVrms (10Hz–100kHz) - meets stringent spectral purity requirements for GSM/CDMA/Bluetooth RF sections |
| Quiescent Current | 140µA typical at 150mA load; <1.5µA when disabled - enables ultra-low-power sleep modes |
| Turn-on Time | 140µs to 95% of VOUT - supports rapid wake-up in burst-mode communication systems |
| Stability | Guaranteed with 1.0µF X7R/Y5V/Z5U ceramic output capacitor (ESR 5–500mΩ) - eliminates need for bulky tantalum or electrolytic caps |
Pinout & Package
LP3999ITL-2.8/NOPB uses a 5-bump DSBGA package (YZR0005, 1.5mm × 1.5mm, 0.5mm pitch) with non-solder-mask-defined (NSMD) pads and bottom-side thermal pad connection via solder balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | VEN | Active-high enable input; ≥0.9V enables regulation, ≤0.4V disables output and reduces IQ to <1.5µA |
| B2 | GND | Analog ground reference for regulator core and feedback loop - must connect to clean low-impedance ground plane |
| C1 | VOUT | Regulated 2.8V output; connects directly to RF IC supply pins or analog circuitry requiring low-noise DC |
| C3 | VIN | Input supply rail; requires 1.0µF ceramic decoupling within 1cm of pin to ensure stability and transient response |
| A3 | CBYPASS | Noise reduction node tied to internal bandgap reference; 0.01µF NPO/COG capacitor minimizes output overshoot and ripple |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 10µVrms (10Hz–100kHz) enables direct powering of VCOs, PLLs, and RF front-end ICs without additional filtering |
| Ceramic-capacitor stability | Stable with 1.0µF output capacitor (X7R/Y5V/Z5U) - reduces board area and cost vs. traditional LDOs requiring >10µF |
| Fast logic-controlled startup | 140µs turn-on time supports time-critical RF transmit bursts and low-latency system wake-up sequences |
| Wide temperature operation | −40°C to +125°C junction range allows deployment in automotive infotainment, industrial handhelds, and outdoor IoT devices |
| Integrated protection | Thermal shutdown (160°C) and short-circuit current limiting (450mA) prevent damage during fault conditions without external circuitry |
Applications
| GSM Portable Phones | Bluetooth Devices |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in compact mobile handsets operating on 2.8V supply rails. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying critical analog/RF blocks where PSRR and noise floor directly impact receive sensitivity and EVM. Use Value: 10µVrms noise and 60mV dropout extend talk time and maintain signal integrity under varying battery voltage. | Use Scenario: Providing regulated 2.8V power to Bluetooth SoCs and audio codecs in wireless earbuds and portable speakers. IC Role / Device Role / Timing Role: Enable-controlled power source enabling synchronized wake/sleep cycles aligned with Bluetooth LE advertising intervals. Use Value: <1.5µA shutdown current and 140µs turn-on minimize average system power and latency during connection events. |
| Wideband CDMA Handsets | Handheld MP3 Devices |
Use Scenario: Supplying low-jitter bias to high-speed ADCs, DACs, and IF amplifiers in WCDMA femtocells and mobile terminals. IC Role / Device Role / Timing Role: Precision voltage reference source maintaining ±2% accuracy across temperature to preserve dynamic range and SNR. Use Value: ±2% output tolerance and 60dB PSRR at 1kHz suppress supply-induced distortion in wideband signal chains. | Use Scenario: Powering digital audio processors and flash memory interfaces in battery-powered portable media players. IC Role / Device Role / Timing Role: Secondary LDO isolating noise-sensitive audio paths from noisy digital switching supplies. Use Value: Ceramic-capacitor compatibility (1µF COUT) reduces footprint and eliminates ESR-related stability risks in dense PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F285PDBVR | 2.85V output (±1%), 200mA rating, 120mV dropout at 200mA, 15µVrms noise, SOT-23-5 package | Higher current capability but larger footprint and higher noise; lacks CBYPASS pin for reference noise suppression | Choose when >150mA load or SOT-23 assembly is preferred over DSBGA miniaturization |
| TPS7A0528PDQNR | 2.8V output (±1%), 200mA rating, 170mV dropout at 200mA, 25µVrms noise, X2SON-4 package | Smaller 4-pin package but no enable control or CBYPASS; higher noise and dropout limit RF suitability | Choose for cost-sensitive, non-RF applications where enable functionality and ultra-low noise are not required |
Compared with TPL720F285PDBVR and TPS7A0528PDQNR, the LP3999ITL-2.8/NOPB uniquely combines DSBGA miniaturization, dedicated CBYPASS pin for sub-10µVrms noise, and guaranteed 150mA delivery with 60mV dropout - making it optimal for space-constrained, noise-sensitive RF/analog subsystems.
Availability
LP3999ITL-2.8/NOPB is available at Aetrix Electronics and suitable for GSM handset design, Bluetooth audio modules, WCDMA front-end power, and handheld MP3 player development requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP3999ITL-2.8/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, embedded processing, and power management technologies, with leadership in high-reliability, low-noise power solutions for wireless and industrial markets.
The LP3999 series was designed specifically for RF/analog power domains in portable battery-operated equipment, emphasizing ultra-low noise, ceramic-capacitor compatibility, and minimal board area - addressing critical needs in cellular, Bluetooth, and portable multimedia applications.
FAQ
What is the maximum output current specification for LP3999ITL-2.8/NOPB?
The LP3999ITL-2.8/NOPB is ensured to deliver 150mA continuous output current across its full operating temperature range (−40°C to +125°C). This rating is validated under worst-case conditions including minimum input voltage (2.5V), maximum ambient temperature, and specified output capacitor (1.0µF ceramic). Short-circuit current limiting is set at 450mA to protect the device during fault conditions.
Does LP3999ITL-2.8/NOPB require an external bypass capacitor, and if so, what value and type?
Yes, LP3999ITL-2.8/NOPB requires a 0.01µF (10nF) capacitor connected between the CBYPASS pin and GND. This capacitor must be a high-quality ceramic type with NPO or COG dielectric to minimize leakage and ensure optimal noise suppression. The CBYPASS pin connects directly to the internal bandgap reference node, and omitting this capacitor increases output noise and can cause overshoot during startup.
What is the recommended output capacitor for LP3999ITL-2.8/NOPB, and why is ESR important?
The LP3999ITL-2.8/NOPB is stable with a 1.0µF ceramic output capacitor having an ESR between 5mΩ and 500mΩ. X7R, Y5V, or Z5U dielectrics are acceptable. ESR is critical because values outside this range destabilize the control loop - too low (<5mΩ) causes excessive phase shift, while too high (>500mΩ) degrades transient response and increases output ripple. Tantalum capacitors are discouraged due to higher ESR and surge-current risks.
How does the enable function operate on LP3999ITL-2.8/NOPB, and what are the voltage thresholds?
The LP3999ITL-2.8/NOPB features an active-high enable input (VEN) with VIH = 0.9V (minimum) and VIL = 0.4V (maximum). When VEN ≥ 0.9V, the regulator powers up with 140µs turn-on time; when VEN ≤ 0.4V, output is disabled and quiescent current drops to <1.5µA. The VEN pin draws only 0.001µA at 0V, enabling direct connection to low-drive GPIOs without loading concerns.
Is LP3999ITL-2.8/NOPB suitable for automotive applications, and what temperature ratings apply?
LP3999ITL-2.8/NOPB is rated for −40°C to +125°C junction temperature operation and has been qualified per TI's standard automotive reliability testing. While not AEC-Q200 certified, its extended temperature range, thermal shutdown (160°C), and robust ESD protection (2kV HBM) make it suitable for non-safety-critical automotive infotainment and telematics modules. For ASIL-B/C systems, consult TI's automotive-grade alternatives.
LP3999ITL-2.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-WFBGA, 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 60dB ~ 50dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-DSBGA (1.41x1.08)
LP3999ITL-2.8/NOPB FAQ
1.How can I place an order for LP3999ITL-2.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3999ITL-2.8/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 LP3999ITL-2.8/NOPB reliable?
The price and inventory of LP3999ITL-2.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3999ITL-2.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP3999ITL-2.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3999ITL-2.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3999ITL-2.8/NOPB?
LP3999ITL-2.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3999ITL-2.8/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 LP3999ITL-2.8/NOPB?
For technical support, including LP3999ITL-2.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3999ITL-2.8/NOPB requirements.
6.How does Aetrix verify that LP3999ITL-2.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3999ITL-2.8/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 LP3999ITL-2.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP3999ITL-2.8/NOPB?
All LP3999ITL-2.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3999ITL-2.8/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 LP3999ITL-2.8/NOPB part is unused and in its original packaging.
Return procedure for LP3999ITL-2.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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