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NXP Semiconductors LD6805K/15P,115
- Part No.:
- LD6805K/15P,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/15P,115.pdf
- Description:
- IC REG LIN 1.5V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
LD6805K/15P,115 from NXP Semiconductors is a 1.5 V fixed-output, 150 mA low-dropout regulator (LDO) with 75 dB PSRR at 1 kHz, 250 mV dropout at full load, and auto-discharge functionality enabled via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and targets power-sensitive portable electronics requiring stable, low-noise 1.5 V supply.
For engineers reviewing the LD6805K/15P,115 datasheet, LD6805K/15P,115 pinout, LD6805K/15P,115 application, or LD6805K/15P,115 equivalent, this page delivers verified specifications, thermal behavior, enable timing, output noise (40 µV RMS), and package-level design constraints for compact mobile PCB integration.
Technical Context
The LD6805K/15P,115 integrates a precision voltage reference, error amplifier, and PMOS pass transistor in monolithic silicon. Its auto-discharge function uses an internal 100 Ω pull-down switch on the OUT pin during disable mode (VEN ≤ 0.4 V), ensuring rapid output discharge without external components.
It achieves 75 dB PSRR at 1 kHz by combining high-gain error amplification and optimized internal compensation, while maintaining stability with only 1.0 µF X7R ceramic output capacitance (ESR 5–500 mΩ). Startup time is 150 µs into 150 mA load with 1 µF capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% over −40 °C to +85 °C; enables direct replacement of 1.5 V logic rails without external feedback. |
| Dropout Voltage | 250 mV at 150 mA; allows operation down to VIN = 1.75 V, maximizing battery runtime in single-cell Li-ion or 2×AA systems. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding sensitive analog or RF circuitry. |
| Output Noise | 40 µV RMS (10 Hz–100 kHz); supports low-noise analog signal chains (e.g., ADC references, audio codecs) without added filtering. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); extends standby time in always-on sensor nodes or IoT endpoints. |
| Enable Threshold | VIL = 0.4 V, VIH = 1.1 V; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Thermal Resistance | Rth(j-a) = 250 K/W (typical); requires PCB copper pour under exposed TAB for sustained 150 mA operation at +85 °C ambient. |
Pinout & Package
LD6805K/15P,115 is housed in a 1.0 × 1.0 × 0.55 mm DFN1010C-4 (SOT1194-1) package with wettable flank leads and an exposed thermal pad (TAB) on the underside connected internally to GND. The TAB must be soldered to a PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage | Delivers 1.5 V to load; features integrated 100 Ω pull-down transistor active during EN = LOW for auto-discharge. |
| 2 - GND | Supply ground reference | Primary return path; connects directly to exposed TAB for thermal conduction and low-impedance grounding. |
| 3 - EN | Enable control input | Active-HIGH digital input; drives internal shutdown circuitry when pulled below 0.4 V (LOW) to enter 0.1 µA quiescent state. |
| 4 - IN | Input voltage supply | Accepts 2.3–5.5 V; requires ≥0.7 µF input capacitor (X7R, ±30%) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down on OUT pin ensures rapid discharge (<300 µs) when disabled-eliminates need for external bleeder resistor. |
| Ultra-low noise regulation | 40 µV RMS output noise (10 Hz–100 kHz) enables clean power for precision analog circuits without additional LDO stages. |
| High PSRR architecture | 75 dB rejection at 1 kHz achieved via high-gain error amplifier and optimized internal compensation-critical for mixed-signal SoC power domains. |
| Miniaturized thermal package | DFN1010C-4 (1.0 × 1.0 mm) with exposed GND TAB enables >100 mW dissipation in <1 mm² footprint-ideal for ultra-thin mobile PCBs. |
| Robust ESD protection | 6 kV HBM ESD rating per IEC 61340-3-1 ensures reliability during board assembly and end-user handling in consumer handheld devices. |
Applications
| Smartphone Baseband Power | Digital Still Camera Sensor Bias |
|---|---|
Use Scenario: Supplying 1.5 V bias to baseband processor I/O banks in space-constrained smartphone mainboards. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.5 V rail with fast enable/disable sequencing synchronized to processor sleep/wake states. Use Value: Auto-discharge prevents residual voltage hold-up on I/O lines during deep sleep, eliminating boot glitches and reducing system-level power leakage by >2 µA. |
Use Scenario: Providing low-noise 1.5 V supply to CMOS image sensor analog front-end (AFE) in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning up switched-mode converter output before sensor analog circuitry. Use Value: 40 µV RMS noise and 75 dB PSRR suppress switching artifacts from upstream DC-DC, preserving image SNR and reducing fixed-pattern noise. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Powering 1.5 V DAC/ADC core in battery-powered MP3 players with strict THD+N requirements. IC Role / Device Role / Timing Role: Precision LDO supplying reference-grade voltage to audio data converters during playback and recording. Use Value: Tight ±2% output accuracy and minimal load regulation error (0.0025%/mA) ensure consistent audio amplitude scaling across battery discharge cycle. |
Use Scenario: Delivering 1.5 V to GPS RF front-end LNA and mixer in handheld navigation units operating near cellular bands. IC Role / Device Role / Timing Role: High-PSRR local regulator isolating sensitive RF circuitry from noisy digital supply domains. Use Value: 75 dB PSRR at 1 kHz attenuates GSM/UMTS band switching noise, improving GPS acquisition sensitivity by ≥2 dB in urban multipath environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B152MR-G | 1.5 V fixed, 150 mA, 200 mV dropout, 65 dB PSRR @ 1 kHz, SOT-25 package (2.9 × 2.8 mm) | Larger footprint; lacks auto-discharge; lower PSRR reduces noise immunity in RF-critical designs | Choose for cost-sensitive, non-RF applications where board area is not constrained and external discharge is acceptable. |
| Richtek RT9013-15GB | 1.5 V fixed, 300 mA, 220 mV dropout, 60 dB PSRR @ 1 kHz, DFN1010-4 (1.0 × 1.0 mm) but no auto-discharge | Higher current capability but no pull-down transistor; higher quiescent current (2.5 µA shutdown) limits ultra-low-power use | Choose when >150 mA peak load is required and auto-discharge is handled externally or omitted. |
Compared with XC6219B152MR-G and RT9013-15GB, LD6805K/15P,115 uniquely combines miniaturized 1 mm² packaging, industry-leading 75 dB PSRR, and integrated auto-discharge-making it optimal for next-generation portable devices demanding simultaneous size reduction, noise suppression, and zero-standby leakage.
Availability
LD6805K/15P,115 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LD6805K/15P,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 high-PSRR LDO product line, engineered specifically for portable electronics where ultra-low noise, miniature packaging, and intelligent power sequencing (e.g., auto-discharge) are critical for system-level power integrity.
FAQ
What is the exact output voltage tolerance of LD6805K/15P,115 across temperature and load?
The LD6805K/15P,115 delivers a nominal 1.5 V output with ±2% tolerance over −40 °C to +85 °C ambient and 1 mA to 150 mA load range. At +25 °C and 1 mA load, variation is tighter at ±0.5%. This accuracy eliminates need for external trimming in most 1.5 V logic and analog applications.
Does LD6805K/15P,115 require an input capacitor, and what type is recommended?
Yes, LD6805K/15P,115 requires an input capacitor for stability and transient response. A minimum 0.7 µF X7R ceramic capacitor (±30% tolerance) rated for −40 °C to +125 °C is recommended. Typical implementation uses 1.0 µF placed as close as possible to the IN pin to minimize parasitic inductance.
How does the auto-discharge function of LD6805K/15P,115 operate during shutdown?
When the EN pin is driven LOW (≤0.4 V), LD6805K/15P,115 activates an internal 100 Ω pull-down transistor between OUT and GND. This discharges the output capacitor in under 300 µs (measured with 1 µF CL), preventing floating voltages that could cause latch-up or false wake-up in downstream logic.
What is the maximum allowable power dissipation for LD6805K/15P,115 at +85 °C ambient?
At +85 °C ambient, LD6805K/15P,115 has a maximum total power dissipation of 400 mW per absolute maximum ratings. With its Rth(j-a) of 250 K/W, junction temperature remains within 125 °C limit if power loss (VIN−1.5 V) × IOUT stays ≤160 mW on a standard two-layer PCB with proper GND pour under the TAB.
Is LD6805K/15P,115 compatible with lead-free reflow soldering processes?
Yes, LD6805K/15P,115 is qualified for lead-free reflow per J-STD-020C. Its DFN1010C-4 package (volume <350 mm³, thickness <1.6 mm) requires a peak reflow temperature of 260 °C. Recommended stencil thickness is 75 µm, and the exposed TAB must be fully soldered to GND for thermal and mechanical reliability.
LD6805K/15P,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):
- 1.5V
- 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/15P,115 FAQ
1.How can I place an order for LD6805K/15P,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/15P,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/15P,115 reliable?
The price and inventory of LD6805K/15P,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/15P,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/15P,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/15P,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/15P,115?
LD6805K/15P,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/15P,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/15P,115?
For technical support, including LD6805K/15P,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/15P,115 requirements.
6.How does Aetrix verify that LD6805K/15P,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/15P,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/15P,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/15P,115?
All LD6805K/15P,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/15P,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/15P,115 part is unused and in its original packaging.
Return procedure for LD6805K/15P,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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