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Texas Instruments LP3999ITL-1.8/NOPB
- Part No.:
- LP3999ITL-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-WFBGA, DSBGA
- Datasheet:
-
LP3999ITL-1.8/NOPB.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:473
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Product details
Overview
LP3999ITL-1.8/NOPB from Texas Instruments is a low-noise, 150mA LDO voltage regulator in a 5-pin DSBGA package, delivering a fixed 1.8V output with ±75mV (±4.2%) tolerance, 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 LP3999ITL-1.8/NOPB datasheet, LP3999ITL-1.8/NOPB pinout, LP3999ITL-1.8/NOPB application, or LP3999ITL-1.8/NOPB equivalent, key selection factors include its ceramic-capacitor stability (1µF COUT), active-high enable control (VIL = 0.4V, VIH = 0.9V), fast 140µs turn-on time, thermal/short-circuit protection, and −40°C to +125°C junction temperature operation.
Technical Context
The LP3999ITL-1.8/NOPB employs a PMOS pass transistor architecture enabling ultra-low dropout and near-zero quiescent current (3nA) in shutdown. Its bandgap reference includes a dedicated CBYPASS pin for 0.01µF noise filtering, decoupling internal high-impedance nodes without affecting transient response.
Designed for RF/analog supply domains, it achieves 60dB PSRR at 1kHz and maintains stability with 1µF X7R/Y5V/Z5U ceramic output capacitors (ESR 5–500mΩ). The DSBGA (YZR0005) package supports minimal board area usage in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±75mV (±4.2%) - ensures compatibility with 1.8V logic and analog ICs across temperature. |
| Max Output Current | 150mA - sufficient for powering RF transceivers, ADCs, or low-power microcontrollers. |
| Dropout Voltage | 60mV typical at 150mA load - enables operation down to VIN = 1.86V, extending battery life in single-cell Li-ion systems. |
| Output Noise | 10µVrms (10Hz–100kHz) - critical for preserving SNR in sensitive RF receivers and precision analog signal chains. |
| Enable Thresholds | VIL ≤ 0.4V (disable), VIH ≥ 0.9V (enable) - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Turn-on Time | 140µs to 95% VOUT - supports rapid power sequencing in wake-up events. |
| Input Range | 2.5V to 6.0V - accepts input from single-cell Li-ion (3.0–4.2V), dual-cell alkaline, or regulated intermediate rails. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
LP3999ITL-1.8/NOPB uses a 5-bump DSBGA package (TI package code YZR0005), measuring 1.441mm × 1.502mm with 0.5mm pitch. The package is moisture-sensitivity Level-1 (260°C peak reflow) and RoHS-compliant with SnAgCu ball finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | VEN | Active-high enable input; ties to system controller GPIO to gate power delivery and reduce quiescent current to 3nA when disabled. |
| B2 | GND | Analog ground reference; must connect to low-impedance, noise-isolated ground plane to preserve PSRR and noise performance. |
| C1 | VOUT | Regulated 1.8V output; requires 1µF ceramic capacitor (X7R/Y5V/Z5U, ESR 5–500mΩ) placed within 1cm of pin for stability. |
| C3 | VIN | Input supply (2.5–6.0V); needs 1µF input capacitor close to pin to suppress source impedance and improve line transient response. |
| A3 | CBYPASS | Noise reduction node; connects to 0.01µF NPO/COG ceramic capacitor to lower output noise by stabilizing bandgap reference. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 1µF ceramic output capacitor | Eliminates need for larger, costlier tantalum caps; reduces solution size and improves reliability in portable designs. |
| 10µVrms output noise (10Hz–100kHz) | Preserves dynamic range in RF front-ends and audio codecs where supply-induced jitter degrades performance. |
| 60mV typical dropout at 150mA | Enables >95% battery energy utilization in 3.0–4.2V Li-ion systems, delaying brownout in deep discharge conditions. |
| 140µs fast turn-on time | Supports burst-mode operation in Bluetooth/Wi-Fi SoCs, minimizing idle power while meeting real-time wake-up latency. |
| −40°C to +125°C operating junction range | Validated for automotive cabin modules, industrial handhelds, and outdoor wireless sensors without derating. |
| Thermal and short-circuit protection | Internally limits power dissipation and output current (450mA typical), removing need for external fault management circuitry. |
Applications
| Bluetooth Audio Transceiver | GSM/CDMA RF Front-End |
|---|---|
Use Scenario: Powers the RF transceiver IC and baseband processor core in compact Bluetooth headsets and speaker docks. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for VCO biasing, LNA, and digital I/O interfaces. Use Value: 10µVrms noise and 60dB PSRR prevent reciprocal mixing and adjacent-channel interference in 2.4GHz ISM band operation. |
Use Scenario: Supplies voltage-controlled oscillators (VCOs), power amplifiers (PAs), and IF mixers in cellular handsets. IC Role / Device Role / Timing Role: Clean analog rail for RF signal generation and reception stages requiring minimal phase noise. Use Value: Stable 1.8V output with <100mV dropout ensures consistent PA efficiency and receiver sensitivity across battery discharge curve. |
| Handheld MP3 Decoder | Portable Medical Sensor Node |
Use Scenario: Provides regulated 1.8V to audio DACs, headphone amplifiers, and flash memory controllers in battery-powered players. IC Role / Device Role / Timing Role: Primary analog supply for high-fidelity audio signal path and low-power digital subsystem. Use Value: Fast 140µs turn-on enables instant playback resume; 1µF ceramic stability simplifies layout in tight form factors. |
Use Scenario: Powers ultra-low-power ADCs, op-amps, and wireless transceivers in wearable ECG/SpO₂ monitors. IC Role / Device Role / Timing Role: Precision analog supply for sensor signal conditioning and RF telemetry transmission. Use Value: −40°C to +125°C operation supports clinical-grade reliability; 3nA shutdown current extends multi-week battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F18-DBVR | 1.8V, 200mA, 120mV dropout (typ), 25µVrms noise, SOT-23-5 package | Higher dropout and noise; larger footprint but easier assembly and thermal handling | Select when board space allows SOT-23 and higher noise tolerance exists in system-level SNR budget. |
| TPS7A0518PDQNR | 1.8V, 200mA, 175mV dropout (typ), 30µVrms noise, X2SON-4 package, no CBYPASS pin | No noise-bypass option; smaller 4-pin package but lacks LP3999ITL-1.8/NOPB's ultra-low-noise capability | Select when ultra-compact size is critical and 30µVrms noise meets application requirements. |
Compared with TPL720F18-DBVR and TPS7A0518PDQNR, LP3999ITL-1.8/NOPB delivers superior noise performance (10µVrms) and lower dropout (60mV) in the smallest DSBGA footprint, making it optimal for RF/analog co-location where supply integrity directly impacts signal fidelity.
Availability
LP3999ITL-1.8/NOPB is available at Aetrix Electronics and suitable for Bluetooth audio transceivers, GSM/CDMA RF front-ends, and handheld MP3 decoder applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP3999ITL-1.8/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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management ICs for portable and industrial markets.
The LP3999 series was designed specifically for RF/analog supply domains in battery-powered wireless devices, prioritizing ultra-low noise, ceramic-capacitor compatibility, and minimal board area consumption.
FAQ
What is the maximum input voltage rating for LP3999ITL-1.8/NOPB?
The absolute maximum input voltage for LP3999ITL-1.8/NOPB is 6.5V, but the recommended operating range is 2.5V to 6.0V per the Electrical Characteristics table. Exceeding 6.0V may trigger internal protection or degrade long-term reliability, even if below the 6.5V absolute limit. Always maintain VIN within 2.5–6.0V for guaranteed performance across −40°C to +125°C junction temperature.
Can LP3999ITL-1.8/NOPB operate with no load connected to VOUT?
Yes, LP3999ITL-1.8/NOPB remains stable and in regulation with zero load current, as confirmed in the "No-Load Stability" section of the datasheet. This behavior is essential for applications like CMOS RAM keep-alive circuits or standby power domains where intermittent loading occurs. Quiescent current under no-load and enabled conditions is 85–150µA.
What capacitor types are recommended for the CBYPASS pin on LP3999ITL-1.8/NOPB?
A 0.01µF capacitor with NPO or COG dielectric is strongly recommended for the CBYPASS pin of LP3999ITL-1.8/NOPB due to its ultra-low leakage and stable capacitance over temperature. Polypropylene or polycarbonate film capacitors are also acceptable alternatives. Avoid high-leakage dielectrics like Y5V or Z5U in this position, as DC leakage can shift output voltage accuracy.
Does LP3999ITL-1.8/NOPB require a minimum ESR on the output capacitor?
No, LP3999ITL-1.8/NOPB does not require minimum ESR on the output capacitor - it is explicitly designed for low-ESR ceramic capacitors (5–500mΩ). Unlike older LDO architectures, its internal compensation is optimized for ceramic stability, eliminating the need for intentional ESR-based damping. Using tantalum or electrolytic caps is discouraged due to size, cost, and ESR drift with temperature.
How does the thermal shutdown feature behave on LP3999ITL-1.8/NOPB?
LP3999ITL-1.8/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. The DSBGA package has θJA = 255°C/W, so continuous 150mA operation at high ambient temperatures requires careful PCB copper pour design to avoid repeated cycling.
LP3999ITL-1.8/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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 60dB (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-1.8/NOPB FAQ
1.How can I place an order for LP3999ITL-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3999ITL-1.8/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-1.8/NOPB reliable?
The price and inventory of LP3999ITL-1.8/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-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP3999ITL-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3999ITL-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3999ITL-1.8/NOPB?
LP3999ITL-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3999ITL-1.8/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-1.8/NOPB?
For technical support, including LP3999ITL-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3999ITL-1.8/NOPB requirements.
6.How does Aetrix verify that LP3999ITL-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3999ITL-1.8/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-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP3999ITL-1.8/NOPB?
All LP3999ITL-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3999ITL-1.8/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-1.8/NOPB part is unused and in its original packaging.
Return procedure for LP3999ITL-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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