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Texas Instruments LP5900TL-2.85/NOPB
- Part No.:
- LP5900TL-2.85/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 4-WFBGA, DSBGA
- Datasheet:
-
LP5900TL-2.85/NOPB.pdf
- Description:
- IC REG LINEAR 2.85V 150MA 4DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:6,179
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Product details
Overview
LP5900TL-2.85/NOPB from Texas Instruments is a 150-mA ultra-low-noise LDO regulator designed for RF and analog circuits, delivering 2.85 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 requires only 0.47-μF ceramic input/output capacitors-no noise bypass capacitor needed-making it ideal for space-constrained cellular handset power rails.
For engineers reviewing the LP5900TL-2.85/NOPB datasheet, LP5900TL-2.85/NOPB pinout, LP5900TL-2.85/NOPB application, or LP5900TL-2.85/NOPB equivalent, key selection criteria include low-noise performance in RF biasing, minimal external component count, thermal shutdown behavior (160°C trip), enable control thresholds (VIH = 1.2 V, VIL = 0.4 V), and compatibility with DSBGA-4 (YZR) packaging for high-density portable layouts.
Technical Context
The LP5900TL-2.85/NOPB employs an internal low-pass RC filter on its reference voltage path to suppress intrinsic noise, eliminating the need for an external noise-bypass capacitor while maintaining 6.5 μVRMS output noise across 10 Hz–100 kHz bandwidth. Its enable circuit integrates a 1-MΩ pull-down resistor, requiring ≥1.2 V on EN to activate regulation and ≤0.4 V to fully disable, drawing <1 µA quiescent current in shutdown.
Stability is guaranteed with 0.47-μF X7R/X5R ceramic capacitors on both input and output (ESR 5–500 mΩ), and the device remains in regulation with zero load. Dropout is specified at 80 mV (typ) / 150 mV (max) at 150 mA, supporting operation down to VIN = VOUT + VDO under full temperature range (–40°C to 125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2% - ensures stable bias for RF transceivers and analog sensor front-ends without external feedback. |
| Max Output Current | 150 mA - sufficient for powering single-band RF ICs, PLLs, or low-power ADCs without thermal derating in DSBGA-4 package. |
| Output Noise | 6.5 μVRMS (10 Hz–100 kHz) - enables clean supply for sensitive VCOs and LNAs where noise-induced phase jitter must be minimized. |
| PSRR | 75 dB at 1 kHz - rejects switching noise from adjacent DC/DC converters, critical in mixed-signal SoC power domains. |
| Dropout Voltage | 80 mV typ. at 150 mA - allows operation from 3.0 V battery sources while maintaining 2.85 V output under full load. |
| Quiescent Current | 25 µA (enabled), <1 µA (disabled) - extends battery life in always-on RF receivers and sleep-mode subsystems. |
| Enable Thresholds | VIH = 1.2 V, VIL = 0.4 V - compatible with 1.8 V/3.3 V GPIO logic without level-shifting in baseband processors. |
Pinout & Package
LP5900TL-2.85/NOPB is packaged in a 4-pin DSBGA (YZR) with 1.108 mm × 1.083 mm body size and exposed thermal pad. The package supports solder reflow per JEDEC J-STD-020 and requires PCB thermal vias under the pad for optimal thermal performance (RθJB = 35.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | EN | Logic-controlled enable input; internal 1-MΩ pull-down ensures safe default-off state; ≥1.2 V required for full regulation. |
| A2 | IN | Input voltage supply (2.5–5.5 V); requires 0.47-μF ceramic capacitor placed ≤1 cm from pin with low-inductance ground return. |
| B1 | GND | Power ground reference; must connect to PCB ground plane; thermal pad (bottom) should be tied to same ground potential. |
| B2 | OUT | Regulated 2.85 V output; drives load up to 150 mA; requires 0.47-μF ceramic capacitor with ESR 5–500 mΩ directly at pin. |
Key Features
| Feature | Design Value |
|---|---|
| No-bypass ultra-low-noise regulation | 6.5 μVRMS output noise achieved via on-die RC filtering - eliminates BOM cost and board area for external 10-nF bypass cap. |
| Minimal external components | Stable with only two 0.47-μF ceramic caps (input + output) - reduces bill-of-materials and simplifies layout for compact handheld PCBs. |
| Thermal overload protection | Auto-shutdown at ~160°C junction temperature with 20°C hysteresis - prevents permanent damage during sustained overloads or poor heatsinking. |
| Zero-load regulation | Maintains 2.85 V output with no load current - supports always-on monitoring circuits and leakage-sensitive analog signal chains. |
| Low-IQ enable control | 25 µA operating IQ, <1 µA shutdown IQ - enables efficient power gating of RF sections without compromising wake-up latency (150 μs turn-on time). |
Applications
| Cellular Transceiver Bias | Wireless LAN Front-End |
|---|---|
|
Use Scenario: Powering the RF power amplifier (PA) and low-noise amplifier (LNA) stages in GSM/UMTS handsets where supply ripple directly impacts EVM and receiver sensitivity. IC Role / Device Role / Timing Role: Ultra-low-noise LDO providing clean 2.85 V bias rail; replaces multi-capacitor LDO solutions requiring 10-nF noise bypass. Use Value: 6.5 μVRMS noise and 75 dB PSRR at 1 kHz prevent AM-to-PM conversion in PA stages and preserve SNR in LNA inputs. |
Use Scenario: Supplying the 2.4 GHz/5 GHz WLAN transceiver IC in portable routers and client devices where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Compact DSBGA-4 LDO delivering regulated 2.85 V to analog RF blocks; enables direct integration beneath RF module footprints. Use Value: 0.47-μF ceramic stability and 80 mV dropout allow operation from shared 3.3 V system rail while minimizing voltage headroom loss. |
| PDA Baseband Core Supply | Portable Medical Sensor Analog Front-End |
|
Use Scenario: Providing low-noise auxiliary voltage to ADC reference buffers and crystal oscillator circuits in legacy PDA platforms with tight EMI budgets. IC Role / Device Role / Timing Role: Enable-controlled LDO ensuring precise 2.85 V for timing-critical analog functions; supports fast power cycling via baseband processor GPIO. Use Value: 150 μs startup time and VIH/VIL thresholds compatible with 1.8 V logic enable rapid wake-from-sleep transitions without brownout. |
Use Scenario: Powering precision instrumentation amplifiers and sigma-delta ADCs in handheld ECG or pulse oximetry devices requiring sub-10 μV noise floors. IC Role / Device Role / Timing Role: Fixed-output LDO supplying analog signal chain with zero-load regulation and thermal shutdown for patient safety compliance. Use Value: ±2% output tolerance and –40°C to 125°C operation ensure accuracy across clinical environmental ranges without calibration drift. |
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 | 150 mA, 1.2 V fixed output; 12 μVRMS noise; requires 1-μF output cap; no enable pin. | Targeted at digital core logic, not RF/analog; lacks enable control and higher noise limits use in sensitive analog paths. | Select only if fixed 1.2 V is required and enable functionality is unnecessary; verify noise budget permits 12 μVRMS. |
| TPS799285DRVR | 200 mA, 2.85 V fixed output; 12 μVRMS noise; 70 dB PSRR at 1 kHz; requires 2.2-μF output cap. | Higher current and PSRR but larger solution size due to minimum 2.2-μF ceramic requirement; less suitable for ultra-compact RF modules. | Prefer when >150 mA load or enhanced PSRR margin is needed; accept larger footprint and higher BOM cost for improved rejection. |
Compared with TPL720F12-DBVR and TPS799285DRVR, LP5900TL-2.85/NOPB uniquely balances ultra-low noise (6.5 μVRMS), minimal capacitance (0.47 μF), enable control, and DSBGA-4 footprint-making it the only option meeting stringent RF bias requirements in space-constrained portable designs without trade-offs in noise, size, or functionality.
Availability
LP5900TL-2.85/NOPB is available at Aetrix Electronics and suitable for cellular transceivers, wireless LAN front-ends, PDA baseband supplies, and portable medical sensor analog front-ends requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP5900TL-2.85/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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and communications product portfolios.
The LP5900 series was developed specifically for RF and analog circuitry in portable wireless devices, emphasizing ultra-low noise, minimal external components, and ultra-small packaging to address board space and EMI constraints in cellular handsets and WLAN modules.
FAQ
What is the maximum input voltage rating for LP5900TL-2.85/NOPB?
The absolute maximum input voltage for LP5900TL-2.85/NOPB is 6 V, but the recommended operating range is 2.5 V to 5.5 V. Exceeding 5.5 V may trigger internal protection or reduce reliability. Operation at 5.5 V is valid only when output current is limited to maintain junction temperature below 125°C, per thermal derating curves in the datasheet.
Does LP5900TL-2.85/NOPB require an external noise-bypass capacitor?
No, LP5900TL-2.85/NOPB does not require an external noise-bypass capacitor. Its internal RC-filtered reference architecture achieves 6.5 μVRMS output noise without one-confirmed by TI's characterization across 10 Hz–100 kHz bandwidth. This eliminates a common 10-nF capacitor and associated layout complexity in RF-sensitive designs.
What package type is used for LP5900TL-2.85/NOPB and what are its mounting requirements?
LP5900TL-2.85/NOPB uses the DSBGA-4 (YZR) package: 1.108 mm × 1.083 mm body with bottom-side thermal pad. Mounting requires solder reflow per JEDEC J-STD-020, thermal vias under the pad connected to ground, and alignment ordinals on PCB for accurate placement. Do not float the thermal pad-it must connect to GND or remain unconnected, never to another potential.
How does the enable function behave on LP5900TL-2.85/NOPB?
LP5900TL-2.85/NOPB features an enable pin (EN) with internal 1-MΩ pull-down to GND. The device turns on when EN ≥1.2 V and fully disables when EN ≤0.4 V, drawing <1 µA. If unused, EN may be tied to IN-but only if VIN stabilizes within 500 μs to avoid delayed start-up. Driving EN from a microcontroller GPIO is fully supported.
Can LP5900TL-2.85/NOPB operate with zero load current?
Yes, LP5900TL-2.85/NOPB maintains regulation and 2.85 V output with zero load current. This "no-load stability" is verified across –40°C to 125°C and enables use in always-on monitoring circuits, crystal oscillator biasing, and standby-mode analog subsystems without output droop or instability.
LP5900TL-2.85/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-WFBGA, 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):
- 2.85V
- 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 (1x1)
LP5900TL-2.85/NOPB FAQ
1.How can I place an order for LP5900TL-2.85/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5900TL-2.85/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 LP5900TL-2.85/NOPB reliable?
The price and inventory of LP5900TL-2.85/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5900TL-2.85/NOPB is usually 5 days.
3.What payment methods are accepted for LP5900TL-2.85/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5900TL-2.85/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5900TL-2.85/NOPB?
LP5900TL-2.85/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5900TL-2.85/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 LP5900TL-2.85/NOPB?
For technical support, including LP5900TL-2.85/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5900TL-2.85/NOPB requirements.
6.How does Aetrix verify that LP5900TL-2.85/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5900TL-2.85/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 LP5900TL-2.85/NOPB meets industry standards.
7.What is the process for return or replacement of LP5900TL-2.85/NOPB?
All LP5900TL-2.85/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5900TL-2.85/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 LP5900TL-2.85/NOPB part is unused and in its original packaging.
Return procedure for LP5900TL-2.85/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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