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NXP Semiconductors LD6805K/36H,115
- Part No.:
- LD6805K/36H,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/36H,115.pdf
- Description:
- IC REG LIN 3.6V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:130,000
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Product details
Overview
LD6805K/36H,115 from NXP Semiconductors is a 3.6 V fixed-output, 150 mA low-dropout (LDO) regulator in a 1 × 1 mm DFN package, delivering 75 dB PSRR at 1 kHz and 250 mV dropout at full load. It features high-ohmic (3-state) output disable behavior and targets power-sensitive portable electronics requiring ultra-low noise and compact footprint.
For engineers reviewing the LD6805K/36H,115 datasheet, LD6805K/36H,115 pinout, LD6805K/36H,115 application, or LD6805K/36H,115 equivalent, this page provides verified electrical specs, thermal performance data, enable timing (150 µs startup), RMS noise (40 µV), and real-world use cases in mobile interface rails and battery-powered subsystems.
Technical Context
The LD6805K/36H,115 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and PMOS pass transistor. Its high-ohmic disable mode isolates the output node without sinking current, preserving downstream capacitance charge during sleep states.
It operates across 2.3 V to 5.5 V input range and maintains ±2% output accuracy over −40 °C to +85 °C ambient. The device achieves 75 dB PSRR at 1 kHz via optimized internal compensation and exhibits 40 µV RMS output noise (10 Hz–100 kHz) with 1 µF X7R ceramic output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6 V ±2% over temperature and load - ensures stable bias for 3.3 V–3.6 V logic interfaces and analog sensors. |
| Max Output Current | 150 mA continuous - supports moderate-power RF modules, display drivers, or MCU core rails in space-constrained designs. |
| Dropout Voltage | 250 mV at 150 mA - enables operation down to 3.85 V input while maintaining regulation, improving battery runtime in single-cell Li-ion systems. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters, critical for ADC reference and RF front-end supply integrity. |
| Output Noise | 40 µV RMS (10 Hz–100 kHz) - minimizes jitter in clock buffers and noise in precision analog signal chains. |
| Quiescent Current | 0.1 µA typical in shutdown - extends standby time in always-on IoT edge nodes and wearable devices. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max - compatible with 1.8 V and 3.3 V GPIO control without level-shifting. |
Pinout & Package
LD6805K/36H,115 uses the DFN1010C-4 (SOT1194-1) package: 1 × 1 × 0.55 mm, thermally enhanced, leadless, with exposed thermal pad (TAB) on underside connected internally to GND. Recommended PCB layout connects TAB to solid ground plane for optimal thermal resistance (Rth(j-a) ≈ 250 K/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 3.6 V; requires ≥0.7 µF X7R ceramic capacitor (1 µF recommended) for stability and transient response. |
| 2 - GND | Power and reference ground | Common return path for IN, OUT, EN; must be low-impedance connection to PCB ground plane. |
| 3 - EN | Active-HIGH enable input | Drives regulator ON when ≥1.1 V; pulls output to high-impedance state when <0.4 V - no auto-discharge. |
| 4 - IN | Input supply voltage | Accepts 2.3–5.5 V; requires local 1 µF ceramic decoupling near pin to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-high PSRR | 75 dB @ 1 kHz - rejects noise from shared power rails, enabling clean supply for sensitive analog circuits without additional filtering. |
| Low-noise regulation | 40 µV RMS output noise - avoids signal degradation in audio codecs, precision ADCs, and RF synthesizer VCO supplies. |
| Fast enable response | 150 µs startup time - meets tight power sequencing requirements in multi-rail mobile SoC platforms. |
| Thermally optimized package | DFN1010C-4 with exposed GND tab - achieves 250 K/W junction-to-ambient thermal resistance with proper PCB copper area, supporting 150 mA in 1 mm² footprint. |
| Robust ESD protection | 6 kV HBM - withstands handling and board assembly stresses without external protection components. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplies 3.6 V bias to baseband processor I/O banks in LTE smartphones where input rail shares noisy DC-DC converter output. IC Role / Device Role / Timing Role: Low-noise post-regulator providing isolated, ripple-free voltage to high-speed digital interfaces. Use Value: 75 dB PSRR prevents switching noise coupling into baseband signal paths, reducing bit error rate and improving RF sensitivity. |
Use Scenario: Powers CMOS image sensor analog front-end in compact digital still cameras with limited PCB area. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 3.6 V for sensor pixel array and column amplifiers. Use Value: 40 µV RMS noise ensures minimal fixed-pattern noise and improved dynamic range in captured images. |
| Portable Media Player Audio Codec | Wearable Health Monitor Analog Front-End |
Use Scenario: Provides clean 3.6 V supply to stereo audio DAC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: High-PSRR LDO placed after main system DC-DC to isolate audio circuitry from digital switching noise. Use Value: Ultra-low 40 µV RMS noise eliminates audible hiss and preserves SNR >105 dB in playback path. |
Use Scenario: Powers ECG/PPG analog signal conditioning chain in ultra-thin wearables where space and battery life are constrained. IC Role / Device Role / Timing Role: Enable-controlled LDO supplying 3.6 V to op-amps, filters, and ADC reference in intermittent-sampling mode. Use Value: 0.1 µA shutdown current extends battery life between measurements; 150 µs startup enables rapid wake-up without latency penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P362MR-G | 3.6 V fixed, 150 mA, 300 mV dropout, 65 dB PSRR @ 1 kHz, SOT-23-5 package (2.9 × 1.6 mm) | Larger footprint; lower PSRR reduces noise rejection in high-density RF layouts | Select when board space allows larger package and PSRR >70 dB is sufficient. |
| Richtek RT9013-36GB | 3.6 V fixed, 500 mA, 200 mV dropout, 60 dB PSRR @ 1 kHz, DFN1010-4 package (1 × 1 mm) | Higher current capability but lower PSRR and higher quiescent current (25 µA vs. 0.1 µA in shutdown) | Choose for higher load margin where ultra-low shutdown current is not required. |
Compared with XC6206P362MR-G and RT9013-36GB, LD6805K/36H,115 delivers superior PSRR and lowest shutdown current in the smallest footprint-critical for miniaturized portable designs demanding both noise immunity and extended battery life.
Availability
LD6805K/36H,115 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codec supply, wearable health monitor analog front-end, and other applications requiring stable component supply with high PSRR and ultra-low noise performance.
Supply support for LD6805K/36H,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 portable electronics requiring sub-1 mm² footprint, low noise, and robust power integrity in battery-constrained environments.
FAQ
What is the maximum input voltage rating for LD6805K/36H,115?
The absolute maximum input voltage for LD6805K/36H,115 is +6.0 V for 4 ms transients, with recommended operating range of 2.3 V to 5.5 V. Exceeding 6.0 V risks permanent damage per IEC 60134 limiting values. For reliable long-term operation, maintain VIN ≤5.5 V under all conditions, especially during hot-plug or load-dump events.
Does LD6805K/36H,115 require an external output capacitor, and what type is recommended?
Yes, LD6805K/36H,115 requires a minimum 0.7 µF external output capacitor for stability, with 1.0 µF X7R ceramic recommended. The capacitor must have ESR between 5 mΩ and 500 mΩ. Using insufficient capacitance or incorrect dielectric (e.g., Y5V) may cause oscillation or degraded transient response. The 1 µF value also optimizes startup time and PSRR performance.
How does the high-ohmic disable mode of LD6805K/36H,115 affect downstream circuitry?
When disabled (EN < 0.4 V), LD6805K/36H,115 places its OUT pin in a high-impedance (3-state) condition, disconnecting the output from the internal pass element. This prevents reverse current flow and preserves charge on downstream capacitors, enabling fast wake-up without recharging delays. It does not actively discharge the output node - unlike LD6805K/xxP variants with pull-down transistors.
What is the thermal resistance (Rth(j-a)) of LD6805K/36H,115 under standard PCB conditions?
The typical junction-to-ambient thermal resistance of LD6805K/36H,115 is 250 K/W when mounted on a two-layer PCB with recommended layout: solid GND connections to all pins, and the exposed TAB soldered to a large copper pour. Actual Rth(j-a) varies with board stack-up and copper area - adding internal ground/power planes and thermal vias beneath the TAB can reduce it by up to 40%.
Is LD6805K/36H,115 RoHS compliant and halogen-free?
Yes, LD6805K/36H,115 is Pb-free, RoHS compliant, and free of halogen and antimony, meeting "dark green" compliance standards. This is confirmed in Section 1.2 of the official NXP product data sheet (Rev. 2, 25 June 2012) and applies to the full LD6805 series manufactured in monolithic silicon technology.
LD6805K/36H,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):
- 3.6V
- 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/36H,115 FAQ
1.How can I place an order for LD6805K/36H,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/36H,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/36H,115 reliable?
The price and inventory of LD6805K/36H,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/36H,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/36H,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/36H,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/36H,115?
LD6805K/36H,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/36H,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/36H,115?
For technical support, including LD6805K/36H,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/36H,115 requirements.
6.How does Aetrix verify that LD6805K/36H,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/36H,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/36H,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/36H,115?
All LD6805K/36H,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/36H,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/36H,115 part is unused and in its original packaging.
Return procedure for LD6805K/36H,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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