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NXP Semiconductors LD6805K/25P,115
- Part No.:
- LD6805K/25P,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/25P,115.pdf
- Description:
- IC REG LIN 2.5V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:50,000
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Product details
Overview
LD6805K/25P,115 from NXP Semiconductors is a 2.5 V fixed-output, 150 mA low-dropout (LDO) regulator in a 1 × 1 mm DFN package, featuring 75 dB PSRR at 1 kHz, 250 mV dropout at full load, and auto-discharge functionality via integrated pull-down transistor. It delivers ultra-low noise (40 µV RMS, 10 Hz–100 kHz) and supports portable power rails for RF and analog circuitry in space-constrained mobile devices.
For engineers reviewing the LD6805K/25P,115 datasheet, LD6805K/25P,115 pinout, LD6805K/25P,115 application, or LD6805K/25P,115 equivalent, this page provides verified electrical parameters, thermal behavior, enable timing, output stability requirements, and validated alternative LDOs with distinct discharge behavior and voltage options.
Technical Context
The LD6805K/25P,115 uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR. Its internal reference generator and shutdown circuit provide precise 2.5 V regulation across −40 °C to +85 °C ambient, with active-high enable control and built-in overcurrent protection.
Unlike the H-variant, the /25P suffix denotes an integrated 100 Ω pull-down transistor on the OUT pin, ensuring rapid discharge of external capacitance during disable-critical for sequencing-sensitive systems like multi-rail processors and battery-powered sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% over temperature; enables direct replacement of legacy 2.5 V logic or analog supply rails without external feedback. |
| Dropout Voltage | 250 mV at 150 mA; allows operation from 2.75 V input while maintaining regulation-ideal for single-cell Li-ion or boosted 2.8 V supplies. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from DC-DC converters feeding adjacent digital blocks. |
| Output Noise | 40 µV RMS (10 Hz–100 kHz); meets low-noise requirements for ADC references, RF synthesizers, and precision op-amp biasing. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Shutdown Current | 0.1 µA typical; reduces system standby power in always-on sensor nodes and IoT endpoints. |
| Thermal Resistance | Rth(j-a) = 250 K/W (typical, 2-layer PCB); requires minimal copper area for thermal management in ultra-thin form factors. |
Pinout & Package
LD6805K/25P,115 is housed in a DFN1010C-4 (SOT1194-1) plastic package: 1 × 1 × 0.55 mm body with exposed thermal pad (TAB) on underside, rated for −40 °C to +125 °C junction temperature. The TAB must be connected to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Supplies 2.5 V load; features integrated 100 Ω pull-down to GND when EN = LOW for fast discharge. |
| 2 - GND | Power and reference ground | Common return path for IN, OUT, EN, and thermal pad; connects directly to PCB ground plane. |
| 3 - EN | Active-HIGH enable input | Drives internal regulator core; logic HIGH ≥1.1 V enables output; logic LOW ≤0.4 V disables with auto-discharge. |
| 4 - IN | Unregulated input supply | Accepts 2.3–5.5 V; requires ≥0.7 µF X7R ceramic capacitor with 5–500 mΩ ESR for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down on OUT pin ensures <300 µs shutdown discharge time-eliminates need for external bleed resistors in power sequencing. |
| Ultra-high PSRR | 75 dB at 1 kHz enables clean 2.5 V rail generation from noisy switcher outputs without additional filtering stages. |
| Low-noise regulation | 40 µV RMS output noise supports high-resolution SAR ADCs and low-phase-noise VCO biasing without post-regulation filtering. |
| Miniaturized footprint | 1 × 1 mm DFN package saves >60% board area vs. SOT-23 alternatives-critical for camera modules and wearable sensors. |
| Robust ESD protection | 6 kV HBM rating allows safe handling and assembly in standard production environments without special ESD controls. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplies 2.5 V to baseband processor I/O banks and RF transceiver analog sections in LTE/5G handsets. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering stable voltage during burst-mode transmission and deep-sleep states. Use Value: 75 dB PSRR prevents GSM/UMTS switching noise from corrupting sensitive receive paths; auto-discharge synchronizes rail collapse with SoC power-down sequence. |
Use Scenario: Powers CMOS image sensor analog front-end (AFE) and column ADC reference in compact digital still cameras. IC Role / Device Role / Timing Role: Precision low-noise voltage source for pixel readout and analog signal chain. Use Value: 40 µV RMS noise ensures <1 LSB error in 12-bit image data; 150 µs startup time matches sensor wake-up latency. |
| Portable Media Player Audio Codec | Wearable Health Sensor Front-End |
Use Scenario: Provides clean 2.5 V bias to stereo DAC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: Low-noise analog supply LDO decoupling audio IC from shared system rail. Use Value: Ultra-low dropout preserves battery runtime down to 2.75 V; 0.1 µA shutdown current extends playback time between charges. |
Use Scenario: Powers ECG/PPG analog signal conditioning and low-power MCU in wrist-worn health monitors. IC Role / Device Role / Timing Role: Sequenced supply enabling synchronized sensor wake-up and data acquisition. Use Value: Auto-discharge ensures rapid rail collapse before MCU enters deep sleep-reducing leakage current in high-impedance sensor paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6805K/25H,115 | Same 2.5 V output and package, but high-ohmic (3-state) output during disable-no auto-discharge. | Used where output must float during shutdown (e.g., bus termination, isolated domains). | Select /25H only if external discharge control or rail isolation is required; /25P is preferred for sequenced multi-rail systems. |
| Torex XC6219B251MR-G | 2.5 V, 150 mA, 200 mV dropout, 65 dB PSRR at 1 kHz, no integrated discharge transistor. | Lacks auto-discharge; requires external 10 kΩ resistor for ~100 µs discharge-increases BOM count and board area. | Choose XC6219B251MR-G only if cost sensitivity outweighs layout simplicity and sequencing reliability. |
Compared with LD6805K/25P,115, the /25H variant offers rail isolation but adds sequencing complexity, while the XC6219B251MR-G trades lower dropout for higher noise and external discharge overhead-making LD6805K/25P,115 optimal for compact, low-noise, sequenced power delivery.
Availability
LD6805K/25P,115 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codec, wearable health sensor front-end, and other portable electronics requiring stable component supply with tight thermal and noise constraints.
Supply support for LD6805K/25P,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.
The LD6805 series belongs to NXP's ultra-miniature, high-PSRR LDO product line, designed specifically for noise-sensitive analog and RF subsystems in battery-powered portable devices where board space and power integrity are critical.
FAQ
What is the maximum input voltage rating for LD6805K/25P,115?
The absolute maximum input voltage for LD6805K/25P,115 is +6.0 V for transient conditions up to 4 ms. For continuous operation, the recommended input range is 2.3 V to 5.5 V. Exceeding 6.0 V-even briefly-may cause permanent damage due to internal junction breakdown. Always verify input rail transients with oscilloscope measurements in final designs using LD6805K/25P,115.
Does LD6805K/25P,115 require an external output capacitor, and what are its specifications?
Yes, LD6805K/25P,115 requires an external output capacitor of 1.0 µF nominal value (minimum 0.7 µF, ±30% tolerance), with ESR between 5 mΩ and 500 mΩ. X7R dielectric ceramic capacitors are recommended to maintain stability across −40 °C to +125 °C. Using undersized or high-ESR capacitors may cause oscillation or extended shutdown time-both confirmed in LD6805K/25P,115 characterization data.
How does the auto-discharge function of LD6805K/25P,115 operate during shutdown?
When the EN pin is driven LOW (≤0.4 V), LD6805K/25P,115 activates an internal 100 Ω pull-down transistor between OUT and GND, discharging external capacitance in under 300 µs. This eliminates floating output states and prevents unintended biasing of downstream circuitry. The /25H variant lacks this feature-confirming LD6805K/25P,115 is uniquely suited for strict power sequencing.
What is the thermal performance of LD6805K/25P,115 on a standard two-layer PCB?
On a standard two-layer PCB with adequate GND copper pour, LD6805K/25P,115 exhibits a typical junction-to-ambient thermal resistance (Rth(j-a)) of 250 K/W. At 150 mA load and 5.5 V input, power dissipation reaches ~375 mW-raising junction temperature by ~94 °C above ambient. To stay within the +125 °C max Tj, ambient must remain below +31 °C unless enhanced thermal layout (e.g., vias to inner GND plane) is used.
Is LD6805K/25P,115 RoHS compliant and halogen-free?
Yes, LD6805K/25P,115 is Pb-free, RoHS compliant, and fully compliant with dark green standards-meaning it is free of halogens (Cl, Br) and antimony. This compliance is documented in NXP's official product data sheet Rev. 2 (25 June 2012) and verified through material declarations. No exemptions apply; the device meets EU Directive 2011/65/EU and JEDEC J-STD-609B Class 1 requirements.
LD6805K/25P,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-UDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- 150 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Transient Voltage
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1010C-4
LD6805K/25P,115 FAQ
1.How can I place an order for LD6805K/25P,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/25P,115 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 LD6805K/25P,115 reliable?
The price and inventory of LD6805K/25P,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6805K/25P,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/25P,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/25P,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/25P,115?
LD6805K/25P,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/25P,115 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 LD6805K/25P,115?
For technical support, including LD6805K/25P,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/25P,115 requirements.
6.How does Aetrix verify that LD6805K/25P,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/25P,115 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 LD6805K/25P,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/25P,115?
All LD6805K/25P,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/25P,115, 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 LD6805K/25P,115 part is unused and in its original packaging.
Return procedure for LD6805K/25P,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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