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Texas Instruments LP5910-1.825YKAR
- Part No.:
- LP5910-1.825YKAR
- Manufacturer:
- Texas Instruments
- Package:
- 4-XFBGA, DSBGA
- Datasheet:
-
LP5910-1.825YKAR.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 4DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:5,918
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Product details
Overview
LP5910-1.825YKAR from Texas Instruments is a fixed-output 1.825 V, 300-mA low-noise LDO regulator optimized for RF and analog power domains. It delivers ±2% output voltage tolerance, 12 µVRMS noise, 75 dB PSRR at 1 kHz, and 120 mV typical dropout at 300 mA - enabling clean, stable biasing for sensitive PLLs, VCOs, and clock circuits in space-constrained portable systems.
For engineers reviewing the LP5910-1.825YKAR datasheet, LP5910-1.825YKAR pinout, LP5910-1.825YKAR application, or LP5910-1.825YKAR equivalent, this page provides verified package mapping (DSBGA-4 YKA), confirmed thermal shutdown (160°C), reverse current protection, automatic output discharge (160 Ω pulldown), and design-meaningful specs - all validated against TI's SNVSA91F Rev. F datasheet.
Technical Context
The LP5910-1.825YKAR uses an NMOS pass device with integrated error amplifier and bandgap reference to achieve ultra-low noise without a bypass capacitor. Its architecture supports remote output capacitor placement up to 10 cm from the OUT pin while maintaining stability with only 1-µF ceramic input and output capacitors.
It implements active reverse current protection to block backflow from OUT to IN when VIN < VOUT, and features a dedicated EN pin with internal 1-MΩ pulldown resistor. Device functional modes include ON (EN ≥ 1 V), OFF (EN ≤ 0.3 V), and fast turnoff via internal 160-Ω output discharge path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.825 V ±2% - ensures precise biasing for 1.8-V logic rails and RF ICs requiring tight voltage margins. |
| Max output current | 300 mA continuous - sufficient to power multiple low-power RF blocks or a single high-performance ADC/DAC. |
| Dropout voltage | 120 mV (typical) at 300 mA - enables operation from single-cell Li-ion (3.0 V min) or post-DC/DC buck outputs down to 1.945 V. |
| Output noise | 12 µVRMS (10 Hz–100 kHz) - eliminates need for external noise filter capacitor, reducing BOM count and PCB area. |
| PSRR @ 1 kHz | 75 dB - suppresses switching noise from upstream DC/DC converters, critical for PLL phase noise performance. |
| Quiescent current | 12 µA (no load, enabled) - extends battery life in always-on sensor or standby-mode subsystems. |
| Enable threshold | VIH = 1 V (min), VIL = 0.3 V (max) - compatible with 1.8-V GPIO without level-shifting; internal 1-MΩ pulldown ensures safe default-OFF state. |
Pinout & Package
LP5910-1.825YKAR is packaged in a 4-pin ultra-thin DSBGA (YKA) measuring 0.742 mm × 0.742 mm (MAX), with bottom-side solder balls and no exposed thermal pad. The package is optimized for minimal footprint in mobile and wearable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 1.3–3.3 V; requires 1-µF ceramic capacitor within 1 cm of pin for stability and EMI suppression. |
| OUT | Regulated output | Delivers fixed 1.825 V; supports remote capacitor placement up to 10 cm - simplifies layout in dense RF sections. |
| GND | Ground reference | Common return for IN, OUT, and EN; must connect to low-impedance analog ground plane to preserve PSRR and noise performance. |
| EN | Enable control input | Active-high logic input; internal 1-MΩ pulldown ensures OFF at power-up if left floating - eliminates need for external pull-down resistor. |
Key Features
| Feature | Design Value |
|---|---|
| No-bypass-capacitor low-noise operation | 12 µVRMS output noise achieved without external noise bypass cap - reduces component count and board area by one passive. |
| Reverse current protection | Blocks current flow from OUT to IN when VIN drops below VOUT - prevents battery drain or system-level backfeeding in multi-rail designs. |
| Automatic output discharge | 160-Ω internal pulldown discharges output capacitance rapidly upon disable - avoids residual voltage that could delay system reset or cause latch-up. |
| Thermal & short-circuit protection | Shuts down at 160°C junction temperature with 15°C hysteresis; limits output current to ~450 mA - protects device and load during fault conditions. |
| Stable with 1-µF ceramics | Guaranteed stability using only 1-µF X7R MLCC on IN and OUT - eliminates ESR tuning and supports smallest-case 0201/0402 capacitors. |
Applications
| RF Power Amplifier Bias | PLL/VCO Core Supply |
|---|---|
|
Use Scenario: Providing ultra-clean bias voltage to GaAs or SiGe RF power amplifiers in 4G/5G front-end modules. IC Role / Device Role / Timing Role: Low-noise post-regulator for PA collector/drain supply, rejecting switching noise from primary DC/DC converter. Use Value: 12 µVRMS noise and 75 dB PSRR at 1 kHz directly improve adjacent channel leakage ratio (ACLR) and EVM performance. |
Use Scenario: Powering the core analog section of a fractional-N PLL used in wireless transceivers or high-speed SerDes clocks. IC Role / Device Role / Timing Role: Dedicated low-phase-noise LDO for VCO tuning and charge pump supply, decoupling from digital supply noise. Use Value: Fixed 1.825 V output matches common PLL core voltage requirements; 120 mV dropout enables use with 2.0-V buck outputs. |
| Portable Medical Sensor Node | IP Camera Image Signal Processor |
|
Use Scenario: Supplying analog front-end (AFE) and low-power MCU in wearable ECG or SpO₂ monitors powered by coin-cell or small Li-ion batteries. IC Role / Device Role / Timing Role: Primary system LDO delivering regulated 1.825 V to precision ADC, op-amps, and sleep-mode microcontroller. Use Value: 12 µA quiescent current extends battery runtime in multi-week deployments; ±2% tolerance ensures ADC reference accuracy. |
Use Scenario: Powering the image signal processor (ISP) and high-speed MIPI CSI-2 interface in compact IP security cameras. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO for ISP core logic and analog pixel processing blocks. Use Value: 75 dB PSRR and fast load transient response (<45 mV deviation) prevent image artifacts during burst-mode sensor readout. |
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 | Same 1.8 V output, but 200 mA max current and higher 25 µA IQ; uses SOT-23-5 package (2.9 mm × 1.6 mm). | Larger footprint and lower current limit make it unsuitable for 300-mA RF loads; better suited for low-power MCU cores. | Select LP5910-1.825YKAR when 300 mA, ultra-low noise, or DSBGA footprint is required; choose TPL720F18-DBVR only for cost-sensitive, lower-current applications. |
| TPS7A20185PDBVR | 1.85 V output (25 mV higher), 300 mA rating, 6.5 µVRMS noise, but requires minimum 0.5 µF output capacitor and has no reverse current protection. | Lower noise suits ultra-sensitive analog chains, but absence of reverse current blocking limits use in multi-supply systems with shared rails. | Choose LP5910-1.825YKAR for guaranteed reverse current protection and 1.825 V exact match; select TPS7A20185PDBVR only if 1.85 V is acceptable and reverse blocking is unnecessary. |
Compared with TPL720F18-DBVR and TPS7A20185PDBVR, LP5910-1.825YKAR uniquely combines 300 mA capability, 12 µVRMS noise, reverse current blocking, and 0.74 mm² DSBGA packaging - making it the only option meeting all four requirements simultaneously for space-constrained RF power domains.
Availability
LP5910-1.825YKAR is available at Aetrix Electronics and suitable for RF power amplifier biasing, PLL/VCO core supply, portable medical sensor nodes, and IP camera image signal processors requiring stable component supply across production lifecycles.
Supply support for LP5910-1.825YKAR 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, embedded processing, and power management ICs for industrial, automotive, and consumer applications.
The LP5910 family was designed specifically for noise-sensitive RF and analog subsystems - delivering class-leading low-noise regulation without bypass capacitors in ultra-small DSBGA packages for mobile, wearable, and IoT edge devices.
FAQ
What is the exact output voltage of LP5910-1.825YKAR?
The LP5910-1.825YKAR provides a factory-trimmed fixed output voltage of 1.825 V with ±2% tolerance over temperature and load. This value is laser-trimmed during production and verified per TI's SNVSA91F datasheet Section 6.5 - ensuring compatibility with 1.8-V nominal logic families and precision analog circuits requiring tight voltage alignment.
Does LP5910-1.825YKAR require an external noise bypass capacitor?
No, LP5910-1.825YKAR does not require an external noise bypass capacitor. Its internal design achieves 12 µVRMS output noise (10 Hz–100 kHz) with only 1-µF input and output ceramic capacitors - eliminating one passive component, reducing PCB area, and lowering BOM cost versus traditional LDOs needing 10-nF bypass caps.
What package type and dimensions does LP5910-1.825YKAR use?
LP5910-1.825YKAR uses the YKA package: a 4-ball ultra-thin DSBGA with 0.35-mm ball pitch and overall body size of 0.742 mm × 0.742 mm (maximum). It has no exposed thermal pad and is reflow-compatible per JEDEC J-STD-020 - ideal for ultra-dense mobile and wearable PCB layouts.
How does the enable (EN) pin function on LP5910-1.825YKAR?
The EN pin on LP5910-1.825YKAR is an active-high logic input with VIH ≥ 1 V (min) and VIL ≤ 0.3 V (max). It includes an internal 1-MΩ pulldown resistor, so the device defaults to OFF if the pin is left unconnected. When pulled high, it enables regulation; when pulled low, it disables output and activates the 160-Ω internal discharge path.
Is LP5910-1.825YKAR stable with 1-µF ceramic capacitors only?
Yes, LP5910-1.825YKAR is fully stable with 1-µF X7R or similar low-ESR ceramic capacitors on both input and output - as specified in TI's SNVSA91F datasheet Sections 5 and 8.2.2. No minimum ESR requirement exists, and stability is guaranteed across –40°C to +125°C junction temperature with no additional compensation components.
LP5910-1.825YKAR 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):
- 3.3V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.37V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 25 µA
- Current - Supply (Max):
- 350 µA
- PSRR:
- 80dB ~ 25dB (100Hz ~ 2MHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DSBGA
LP5910-1.825YKAR FAQ
1.How can I place an order for LP5910-1.825YKAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5910-1.825YKAR 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 LP5910-1.825YKAR reliable?
The price and inventory of LP5910-1.825YKAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5910-1.825YKAR is usually 5 days.
3.What payment methods are accepted for LP5910-1.825YKAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5910-1.825YKAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5910-1.825YKAR?
LP5910-1.825YKAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5910-1.825YKAR 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 LP5910-1.825YKAR?
For technical support, including LP5910-1.825YKAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5910-1.825YKAR requirements.
6.How does Aetrix verify that LP5910-1.825YKAR is sourced from the original manufacturer or authorized distributors?
All LP5910-1.825YKAR 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 LP5910-1.825YKAR meets industry standards.
7.What is the process for return or replacement of LP5910-1.825YKAR?
All LP5910-1.825YKAR units undergo pre-shipment inspection (PSI). If there is an issue with LP5910-1.825YKAR, 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 LP5910-1.825YKAR part is unused and in its original packaging.
Return procedure for LP5910-1.825YKAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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