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Texas Instruments LP5900XRX-2.8/NOPB
- Part No.:
- LP5900XRX-2.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 4-XFBGA, DSBGA
- Datasheet:
-
LP5900XRX-2.8/NOPB.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 4DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,923
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Product details
Overview
LP5900XRX-2.8/NOPB from Texas Instruments is a 150-mA ultra-low-noise LDO regulator designed for RF and analog circuit power supply, delivering 2.8 V output with ±2% tolerance, 80 mV typical dropout, 6.5 μVRMS output noise, and 75 dB PSRR at 1 kHz. It operates from 2.5 V to 5.5 V input and supports stable regulation with only 0.47-μF ceramic input/output capacitors-no noise bypass capacitor required.
For engineers reviewing the LP5900XRX-2.8/NOPB datasheet, LP5900XRX-2.8/NOPB pinout, LP5900XRX-2.8/NOPB application, or LP5900XRX-2.8/NOPB equivalent, key selection criteria include low-noise performance in RF front-end biasing, minimal external component count for space-constrained portable designs, thermal shutdown behavior at 160°C, and logic-controlled enable functionality with 1-MΩ internal pull-down.
Technical Context
The LP5900XRX-2.8/NOPB employs an innovative internal RC-filtered reference architecture that suppresses bandgap noise before amplification, eliminating the need for an external noise-bypass capacitor while maintaining 6.5 μVRMS integrated noise (10 Hz–100 kHz). Its control loop is optimized for stability with 0.47-μF ceramic capacitors on both input and output, and it features a dedicated enable pin with VIH = 1.2 V and VIL = 0.4 V thresholds.
Thermal-overload protection activates at ~160°C junction temperature with 20°C hysteresis, and the device sustains full 150-mA load current across −40°C to +125°C junction temperature range. Quiescent current is 25 μA (enabled, no load) and <1 μA (disabled), supporting battery-sensitive applications requiring rapid, low-power state transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% - ensures precise biasing for RF transceivers and ADC reference supplies without external feedback network. |
| Max Output Current | 150 mA - sufficient to power single-band RF power amplifiers or dual low-power analog sensor channels. |
| Dropout Voltage | 80 mV typ. at 150 mA - enables operation from 2.88 V input, critical for Li-ion battery systems under discharge. |
| Output Noise | 6.5 μVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements in local oscillator supply rails. |
| PSRR | 75 dB at 1 kHz - rejects switching noise from adjacent DC/DC converters feeding mixed-signal SoCs. |
| Quiescent Current | 25 μA (enabled, no load) - extends standby time in always-on wireless sensor nodes. |
| Enable Thresholds | VIH = 1.2 V, VIL = 0.4 V - compatible with 1.8-V and 3.3-V GPIO logic without level-shifting. |
Pinout & Package
LP5900XRX-2.8/NOPB is packaged in a 4-pin DSBGA (YZR) with 1.108 mm × 1.083 mm body size and exposed thermal pad. The package requires soldering to PCB copper area with thermal vias for reliable heat dissipation; thermal pad may be connected to GND or left floating but must not be biased to any voltage other than GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output | Delivers stable 2.8 V to load; requires 0.47-μF ceramic capacitor placed ≤1 cm from pin with low-inductance ground return. |
| 2 (NC) | No internal connection | Unbonded die pad; must be left unconnected or tied to GND for mechanical stability-no electrical function. |
| 3 (GND) | Power ground reference | Common return path for input, output, and internal circuitry; must connect directly to low-impedance analog ground plane. |
| 4 (EN) | Logic enable input | Active-high control: ≥1.2 V enables regulator; ≤0.4 V disables output; internal 1-MΩ pull-down ensures default OFF state. |
| Thermal Pad | Thermal conduction path | Exposed bottom metal connects to PCB copper pour; thermal vias recommended to inner ground layers for RθJB = 35.6°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| No-bypass-capacitor low-noise design | Internal first-order RC filtering of reference voltage eliminates need for external 10-nF bypass cap-reduces BOM count and board area in RF modules. |
| Ultra-low quiescent current | 25 μA enabled / <1 μA disabled - enables microamp-level sleep modes in cellular IoT endpoints without compromising wake-up speed. |
| Stable with minimal capacitance | Guaranteed stability with 0.47-μF X7R/X5R ceramic caps on IN/OUT - avoids costly high-ESR tantalum or large-size electrolytics. |
| Fast enable response | 150 μs turn-on time to 95% VOUT - supports burst-mode RF transmission where supply must track digital enable signals tightly. |
| Robust thermal protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during transient overloads in compact handheld enclosures. |
Applications
| Cellular Front-End Biasing | Wireless LAN RF Power Amplifier Supply |
|---|---|
|
Use Scenario: Providing clean bias voltage to PA driver stages in GSM/UMTS/LTE handsets where switching noise from PMICs can degrade EVM. IC Role / Device Role / Timing Role: Low-noise LDO supplying 2.8 V to RF PA bias pins; replaces bulkier solutions requiring separate noise filters. Use Value: 6.5 μVRMS noise and 75 dB PSRR at 1 kHz prevent AM-to-PM distortion in PA output, maintaining ACLR compliance. |
Use Scenario: Powering 2.4 GHz/5 GHz WLAN PA ICs in compact access points and client adapters with tight thermal constraints. IC Role / Device Role / Timing Role: Primary analog rail LDO enabling fast PA enable/disable cycles synchronized to MAC-layer packet timing. Use Value: 150 μs startup time and 25 μA quiescent current allow dynamic PA powering aligned to 802.11 frame boundaries. |
| Portable Audio Codec Reference Supply | Low-Power Sensor Signal Chain Bias |
|
Use Scenario: Delivering ultra-clean 2.8 V reference to stereo audio DAC/ADC in Bluetooth headsets and wearables. IC Role / Device Role / Timing Role: Dedicated LDO isolating sensitive audio reference from noisy digital domains and battery fluctuations. Use Value: 6.5 μVRMS noise directly translates to >105 dB SNR in 24-bit audio converters without post-regulation filtering. |
Use Scenario: Supplying precision analog front-end (AFE) for medical-grade biosensors or environmental gas sensors operating on coin cells. IC Role / Device Role / Timing Role: Always-on LDO powering op-amps, references, and ADC drivers in sub-100-μA system sleep states. Use Value: <1 μA shutdown current and ±2% output tolerance ensure multi-year battery life and measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F12-DBVR | Fixed 1.2 V output; 200 mA rating; 12 μVRMS noise; requires 1-μF output cap. | Targeted at core logic rails-not RF/analog bias; higher noise unsuitable for sensitive receivers. | Select only if 1.2 V output and higher current are required; not drop-in for 2.8 V RF biasing. |
| MCP1700T-2802E/TT | 2.8 V output; 250 mA; 30 μVRMS noise; 65 dB PSRR at 1 kHz; needs 1-μF ceramic cap. | Higher noise and lower PSRR limit use in high-dynamic-range RF paths; wider dropout (178 mV). | Acceptable for cost-sensitive non-RF analog rails where 6.5 μVRMS noise is not mandatory. |
Compared with LP5900XRX-2.8/NOPB, TPL720F12-DBVR offers higher current but mismatched voltage and elevated noise, while MCP1700T-2802E/TT provides same output voltage but trades 4.5× higher noise and 2.2× lower PSRR-making LP5900XRX-2.8/NOPB uniquely suited for RF analog supply integrity.
Availability
LP5900XRX-2.8/NOPB is available at Aetrix Electronics and suitable for cellular handset RF front-end biasing, wireless LAN power amplifier supply, and portable audio codec reference applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP5900XRX-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 and embedded processing technologies, with leadership in power management, signal chain, and high-reliability interface solutions.
The LP5900 product line was engineered specifically for ultra-low-noise, low-quiescent-current power delivery to RF transceivers and precision analog circuits in space-constrained portable electronics.
FAQ
What is the minimum input voltage required for LP5900XRX-2.8/NOPB to regulate 2.8 V output?
The LP5900XRX-2.8/NOPB requires a minimum input voltage of 2.5 V to operate, but to maintain regulation at full 150-mA load, VIN must be ≥ VOUT + VDO = 2.8 V + 80 mV = 2.88 V. Below this, dropout behavior occurs and output voltage drops linearly with input.
Can LP5900XRX-2.8/NOPB be used without an input capacitor?
No. LP5900XRX-2.8/NOPB requires a minimum 0.47-μF ceramic input capacitor connected between IN and GND, located ≤1 cm from the pin with low-inductance ground return. Omitting it risks instability, oscillation, or failure to start up reliably under load transients.
Is the thermal pad on LP5900XRX-2.8/NOPB electrically connected internally?
No-the thermal pad on LP5900XRX-2.8/NOPB is not electrically connected to any internal node. It serves only for thermal conduction and may be connected to GND or left floating, but must never be biased to any voltage other than the same GND potential seen at pin 3.
Does LP5900XRX-2.8/NOPB require a noise-bypass capacitor?
No. LP5900XRX-2.8/NOPB uses an internal RC-filtered reference architecture that eliminates the need for an external 10-nF noise-bypass capacitor-unlike conventional LDOs. This reduces component count and PCB area while maintaining 6.5 μVRMS output noise.
What is the maximum junction temperature before LP5900XRX-2.8/NOPB shuts down?
LP5900XRX-2.8/NOPB initiates thermal shutdown at approximately 160°C junction temperature, with 20°C hysteresis-re-enabling output when junction cools to ~140°C. This protects the device during sustained overload or poor PCB thermal design.
LP5900XRX-2.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- 230 µA
- PSRR:
- 85dB ~ 40dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DSBGA
LP5900XRX-2.8/NOPB FAQ
1.How can I place an order for LP5900XRX-2.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5900XRX-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 LP5900XRX-2.8/NOPB reliable?
The price and inventory of LP5900XRX-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 LP5900XRX-2.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP5900XRX-2.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5900XRX-2.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5900XRX-2.8/NOPB?
LP5900XRX-2.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5900XRX-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 LP5900XRX-2.8/NOPB?
For technical support, including LP5900XRX-2.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5900XRX-2.8/NOPB requirements.
6.How does Aetrix verify that LP5900XRX-2.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5900XRX-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 LP5900XRX-2.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP5900XRX-2.8/NOPB?
All LP5900XRX-2.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5900XRX-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 LP5900XRX-2.8/NOPB part is unused and in its original packaging.
Return procedure for LP5900XRX-2.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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