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Texas Instruments LP3999ITLX-2.5/NOPB
- Part No.:
- LP3999ITLX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP3999ITLX-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP3999ITLX-2.5/NOPB from Texas Instruments is a low-noise, 150mA LDO voltage regulator in a 5-pin DSBGA package, delivering a fixed 2.5V output with ±2% tolerance (±50mV), 60mV typical dropout at 150mA, and 10µVrms output noise (10Hz–100kHz). It powers RF/analog circuitry in portable wireless devices requiring stable, clean supply rails.
For engineers reviewing the LP3999ITLX-2.5/NOPB datasheet, LP3999ITLX-2.5/NOPB pinout, LP3999ITLX-2.5/NOPB application, or LP3999ITLX-2.5/NOPB equivalent, key selection criteria include its ceramic-capacitor stability (1µF COUT), logic-controlled enable (active-high, 0.9V threshold), fast 140µs turn-on, thermal/short-circuit protection, and −40°C to +125°C junction operation.
Technical Context
The LP3999ITLX-2.5/NOPB employs a PMOS pass transistor architecture enabling ultra-low quiescent current (3nA when disabled) and near-zero dropout sensitivity to load. Its internal bandgap reference connects directly to the CBYPASS pin, where a 0.01µF capacitor suppresses noise without degrading transient response.
Stability is ensured with 1µF ceramic output capacitors (X7R/Y5V/Z5U, 5–500mΩ ESR) and no minimum load requirement. The device operates across 2.5V–6.0V input while maintaining 60dB PSRR at 1kHz and 50dB at 10kHz under 1mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% (±50mV); ensures precision biasing for RF ICs and analog sensors. |
| Max Output Current | 150mA guaranteed; supports moderate-power RF front-ends and mixed-signal SoCs. |
| Dropout Voltage | 60mV typical at 150mA; enables operation down to VIN = 2.56V, extending battery life in single-cell Li-ion systems. |
| Output Noise | 10µVrms (10Hz–100kHz); minimizes phase noise in VCOs and SNR degradation in ADCs/DACs. |
| Enable Threshold | VIH = 0.9V, VIL = 0.4V; compatible with 1.8V/2.5V/3.3V logic families without level-shifting. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
| Quiescent Current | 85–150µA active; drops to ≤3nA in shutdown-critical for always-on keep-alive circuits. |
Pinout & Package
LP3999ITLX-2.5/NOPB uses a 5-bump DSBGA package (YZR0005, 1.5mm × 1.5mm, 0.5mm pitch) with non-solder-mask-defined (NSMD) pads. Mounting requires alignment ordinals and avoids direct sunlight exposure due to light sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (VEN) | Enable input | Active-high control: ≥0.9V enables regulation; ≤0.4V disables output and reduces IQ to ≤3nA. |
| B2 (GND) | Ground reference | Common return path for input, output, and internal circuitry; must connect to low-impedance analog ground. |
| C1 (VOUT) | Regulated output | Delivers 2.5V ±2% to load; requires 1µF ceramic capacitor (X7R/Y5V/Z5U) with 5–500mΩ ESR. |
| C3 (VIN) | Input supply | Accepts 2.5V–6.0V; needs local 1µF ceramic bypass within 1cm of pin to ensure stability. |
| A3 (CBYPASS) | Noise reduction node | Connects to high-impedance bandgap reference; 0.01µF NPO/COG capacitor reduces output noise and startup overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 10µVrms output noise (10Hz–100kHz) preserves signal integrity in RF receivers and precision analog stages. |
| Ceramic-capacitor stability | Guaranteed stable with 1µF X7R/Y5V/Z5U output capacitor-enables smallest PCB footprint among LDOs in class. |
| Fast 140µs turn-on | Enables rapid power sequencing in multi-rail systems without external delay circuits or soft-start components. |
| Zero-load regulation | Maintains regulation with no external load-supports CMOS RAM keep-alive and standby bias applications. |
| Robust protection suite | Integrated thermal shutdown (160°C), short-circuit current limit (450mA), and over-current foldback prevent field failures. |
Applications
| GSM Portable Phones | Bluetooth Devices |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in compact handsets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise 2.5V supply for VCOs, LNAs, and ADCs-minimizing phase noise and quantization error. Use Value: 10µVrms noise and 60mV dropout extend talk time and maintain EVM compliance across battery discharge curve. | Use Scenario: Supplying Bluetooth radio modules and audio codecs in wearables and wireless headsets. IC Role / Device Role / Timing Role: Clean 2.5V rail for digital baseband and analog audio paths-reducing intermodulation distortion in Class-D amplifiers. Use Value: Fast 140µs turn-on enables synchronized wake-up with host MCU, cutting system idle current by >99% in sleep mode. |
| Wideband CDMA Handsets | Handheld MP3 Players |
Use Scenario: Delivering regulated power to multi-band RF front-ends requiring tight voltage accuracy and low ripple. IC Role / Device Role / Timing Role: Primary LDO for PA driver stages and diversity receive chains-ensuring consistent gain and linearity. Use Value: ±2% output tolerance and 60dB PSRR at 1kHz suppress supply-induced AM-to-PM conversion in power amplifiers. | Use Scenario: Biasing flash memory interfaces and DACs in portable media players with variable battery voltage. IC Role / Device Role / Timing Role: Stable 2.5V source for NAND controller I/O and audio DAC reference-preventing data corruption and audible artifacts. Use Value: Zero-load regulation maintains voltage during deep-sleep states; 3nA shutdown current extends weeks-long standby duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F25-DBVR | 250mA output, 120mV dropout at 250mA, 15µVrms noise, SOT-23-5 package | Higher current capacity but larger footprint and higher noise; requires 2.2µF output capacitor | Select when >150mA load or SOT-23 assembly compatibility is required; avoid if board space or RF noise budget is constrained. |
| TPS79925YZTT | 200mA output, 75mV dropout at 200mA, 12µVrms noise, 5-pin DSBGA (same YZR0005 footprint) | Pin-compatible DSBGA replacement with tighter ±1% tolerance and lower 12µVrms noise | Preferred upgrade path for new designs needing improved accuracy/noise; identical layout and thermal performance. |
Compared with LP3999ITLX-2.5/NOPB, TPL720F25-DBVR offers higher current but sacrifices noise performance and board area efficiency, while TPS79925YZTT delivers superior accuracy and noise in the same DSBGA package-making it a drop-in enhancement for next-generation RF modules.
Availability
LP3999ITLX-2.5/NOPB is available at Aetrix Electronics and suitable for GSM phones, Bluetooth modules, wideband CDMA handsets, and handheld MP3 players requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LP3999ITLX-2.5/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 connectivity technologies, with decades of expertise in power management ICs for portable and RF applications.
The LP3999 series was engineered specifically for noise-sensitive RF/analog subsystems in battery-powered wireless devices, prioritizing ultra-low noise, ceramic-capacitor compatibility, and minimal quiescent current without sacrificing protection or thermal robustness.
FAQ
What is the maximum input voltage rating for LP3999ITLX-2.5/NOPB?
The absolute maximum input voltage for LP3999ITLX-2.5/NOPB is 6.5V, but the recommended operating range is 2.5V to 6.0V per the datasheet's Operating Ratings. Exceeding 6.0V may trigger internal protection or degrade long-term reliability, even if below the 6.5V absolute limit. Always maintain VIN ≤6.0V in normal operation for guaranteed performance and lifetime.
Does LP3999ITLX-2.5/NOPB require an external bypass capacitor on the CBYPASS pin?
Yes, LP3999ITLX-2.5/NOPB requires a 0.01µF ceramic capacitor (NPO/COG dielectric preferred) between the CBYPASS pin and GND. This capacitor reduces output noise and prevents overshoot during startup by stabilizing the internal bandgap reference node. Omitting it increases output noise beyond the specified 10µVrms and risks instability in sensitive RF applications.
Can LP3999ITLX-2.5/NOPB operate with no load connected to VOUT?
Yes, LP3999ITLX-2.5/NOPB remains stable and regulated with zero load current-a key feature confirmed in the datasheet's "No-Load Stability" section. This makes LP3999ITLX-2.5/NOPB suitable for CMOS RAM keep-alive circuits and other always-on bias applications where continuous regulation is required even during deep sleep states.
What is the thermal shutdown behavior of LP3999ITLX-2.5/NOPB?
LP3999ITLX-2.5/NOPB activates thermal shutdown at 160°C junction temperature with 20°C hysteresis, meaning it resumes regulation only after cooling to ≤140°C. This protection is internal and automatic-no external circuitry is needed. During shutdown, output is disabled and quiescent current remains near 3nA, preventing thermal runaway while preserving battery charge.
Is LP3999ITLX-2.5/NOPB compatible with 1.0µF X7R ceramic output capacitors?
Yes, LP3999ITLX-2.5/NOPB is explicitly designed and tested for stability with 1.0µF X7R ceramic output capacitors (ESR 5–500mΩ), as stated in the datasheet's "Recommended Output Capacitor" table and "Capacitor Characteristics" section. X7R is preferred over Y5V/Z5U for better temperature stability, maintaining ≥0.7µF capacitance across −40°C to +85°C ambient.
LP3999ITLX-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-WFBGA, DSBGA
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 60dB (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)
LP3999ITLX-2.5/NOPB FAQ
1.How can I place an order for LP3999ITLX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3999ITLX-2.5/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 LP3999ITLX-2.5/NOPB reliable?
The price and inventory of LP3999ITLX-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3999ITLX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP3999ITLX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3999ITLX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3999ITLX-2.5/NOPB?
LP3999ITLX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3999ITLX-2.5/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 LP3999ITLX-2.5/NOPB?
For technical support, including LP3999ITLX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3999ITLX-2.5/NOPB requirements.
6.How does Aetrix verify that LP3999ITLX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3999ITLX-2.5/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 LP3999ITLX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP3999ITLX-2.5/NOPB?
All LP3999ITLX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3999ITLX-2.5/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 LP3999ITLX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP3999ITLX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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