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NXP Semiconductors LD6805K/29H,115
- Part No.:
- LD6805K/29H,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/29H,115.pdf
- Description:
- IC REG LIN 2.9V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:50,000
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Product details
Overview
LD6805K/29H from NXP Semiconductors is a 2.9 V fixed-output, 150 mA low-dropout (LDO) regulator with 75 dB PSRR at 1 kHz, 250 mV dropout at full load, and ultra-low 0.1 µA shutdown current. It operates from 2.3 V to 5.5 V input and features high-ohmic (3-state) output disable behavior, making it suitable for power sequencing in space-constrained mobile interfaces.
For engineers reviewing the LD6805K/29H datasheet, LD6805K/29H pinout, LD6805K/29H application, or LD6805K/29H equivalent, key selection criteria include its 1×1 mm DFN package, 40 µV RMS output noise, 150 µs startup time, and compatibility with 0.7–1.0 µF X7R output capacitors in portable analog/digital supply rails.
Technical Context
The LD6805K/29H integrates a precision voltage reference, error amplifier, and P-channel pass transistor in monolithic silicon. Its enable input (active HIGH) controls a shutdown circuit that places the OUT pin in a high-impedance state-no internal pull-down-enabling clean power rail isolation during system sleep modes.
Designed for stability with low-ESR ceramic capacitors (5–500 mΩ), the regulator maintains regulation across −40 °C to +85 °C ambient while delivering ±0.5% output accuracy at 25 °C and ±3% over full temperature range for its 2.9 V nominal output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9 V ±3% over −40 °C to +85 °C; enables direct powering of 2.8–3.0 V logic rails without external feedback. |
| Dropout Voltage | 250 mV at 150 mA load; allows operation with only 3.15 V input for stable 2.9 V output, minimizing wasted headroom. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding sensitive RF or audio circuitry. |
| Quiescent Current | 0.1 µA typical in shutdown mode; extends battery life in always-on standby applications like Bluetooth LE peripherals. |
| Output Noise | 40 µV RMS (10 Hz–100 kHz); supports low-noise analog signal chains in camera modules or ADC reference supplies. |
| Startup Time | 150 µs to 95% of 2.9 V; meets fast wake-up timing requirements in mobile SoC power domains. |
| Input Voltage Range | 2.3 V to 5.5 V; compatible with single-cell Li-ion (2.7–4.2 V), Li-polymer, and USB-powered systems. |
Pinout & Package
LD6805K/29H uses the DFN1010C-4 (SOT1194-1) package: 1 × 1 × 0.55 mm body with exposed thermal pad (TAB) on underside, rated for 250 K/W junction-to-ambient thermal resistance when properly soldered to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 2.9 V; requires 0.7–1.0 µF X7R capacitor with 5–500 mΩ ESR for stability; high-impedance when EN = LOW. |
| 2 - GND | Power and reference ground | Common return for IN, OUT, and EN; TAB must be connected to PCB GND plane for optimal thermal performance. |
| 3 - EN | Enable control input | Active HIGH logic interface (VIH ≥ 1.1 V); drives internal shutdown circuit to place OUT in 3-state mode. |
| 4 - IN | Unregulated input supply | Accepts 2.3–5.5 V; requires local 1 µF ceramic decoupling capacitor near pin for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-high PSRR | 75 dB at 1 kHz enables clean power delivery to noise-sensitive analog blocks without additional filtering. |
| Low-noise output | 40 µV RMS noise (10 Hz–100 kHz) supports precision sensor interfaces and high-resolution ADC references. |
| Fast startup | 150 µs turn-on time ensures rapid power domain activation in burst-mode communication systems. |
| High-ohmic disable | 3-state output during shutdown prevents back-powering or leakage into downstream circuits during sleep. |
| Robust ESD protection | 6 kV HBM rating protects against handling damage in automated assembly and field-replaceable modules. |
Applications
| Smartphone Baseband Power | Digital Still Camera Sensor Supply |
|---|---|
Use Scenario: Powers baseband processor I/O banks requiring tightly regulated 2.9 V with minimal ripple in LTE/5G handsets. IC Role / Device Role / Timing Role: Primary LDO for digital interface rail; sequenced via AP-controlled EN signal during modem boot and sleep transitions. Use Value: 75 dB PSRR rejects noise from PMIC switching regulators; 0.1 µA shutdown current minimizes standby drain on single-cell batteries. | Use Scenario: Supplies image sensor analog front-end (AFE) and column ADC circuitry in compact DSC modules. IC Role / Device Role / Timing Role: Low-noise post-regulator for sensor bias; enabled synchronously with exposure trigger to reduce idle power. Use Value: 40 µV RMS output noise preserves SNR in 12+ bit imaging pipelines; 1×1 mm footprint saves board area near optical stack. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Provides clean 2.9 V supply to stereo audio DAC and headphone amplifier in battery-powered MP3 players. IC Role / Device Role / Timing Role: Dedicated LDO for audio signal chain; disabled during pause to eliminate residual hiss and conserve energy. Use Value: High-ohmic disable prevents cross-talk between powered-down audio stages; 250 mV dropout maximizes battery runtime. | Use Scenario: Powers GPS RF front-end LNA and downconverter ICs in handheld navigation units with tight thermal constraints. IC Role / Device Role / Timing Role: Local LDO for RF section; thermally coupled to GND plane via exposed TAB to sustain continuous operation under solar loading. Use Value: 250 K/W Rth(j-a) with proper layout enables >100 mA sustained output without derating; 2.3 V min input supports aging battery discharge curves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0529PDBVR | 2.9 V fixed, 200 mA, 170 mV dropout, 50 dB PSRR @ 1 kHz, SOT-23-5 package (2.9 × 1.6 mm) | Larger footprint; lower PSRR reduces noise rejection in RF-sensitive designs | Select when higher output current or simpler PCB layout outweighs PSRR and size requirements. |
| MCP1700T-2902E/TT | 2.9 V fixed, 250 mA, 600 mV dropout, 45 dB PSRR @ 1 kHz, SOT-23-3 package | Higher dropout limits usable input range; lower PSRR demands stricter input filtering | Choose for cost-sensitive consumer applications where 2.9 V rail tolerance >±5% is acceptable. |
Compared with TPS7A0529PDBVR and MCP1700T-2902E/TT, the LD6805K/29H delivers superior noise suppression (75 dB vs ≤50 dB) and smallest board footprint (1×1 mm vs ≥2.9×1.6 mm), critical for miniaturized mobile interfaces where PSRR and space are primary constraints.
Availability
LD6805K/29H is available at Aetrix Electronics and suitable for smartphone baseband power, digital still camera sensor supply, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LD6805K/29H 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 mobile markets.
The LD6805 series belongs to NXP's high-PSRR LDO portfolio, engineered specifically for noise-critical portable electronics where ultra-small footprint, low quiescent current, and robust input ripple rejection are mandatory design requirements.
FAQ
What is the maximum input voltage rating for the LD6805K/29H?
The LD6805K/29H has an absolute maximum input voltage of +6.0 V for 4 ms transients, with recommended operating range limited to 2.3 V to 5.5 V. Exceeding 5.5 V continuously risks permanent damage, as specified in Table 5 of the NXP product data sheet. The LD6805K/29H must be used within this range to ensure reliable regulation and thermal safety.
Does the LD6805K/29H require an external output capacitor, and what value is recommended?
Yes, the LD6805K/29H requires an external output capacitor for stability, with a minimum value of 0.7 µF and recommended value of 1.0 µF. The capacitor must be X7R dielectric with ESR between 5 mΩ and 500 mΩ to meet full temperature specification (−40 °C to +125 °C). This requirement is explicitly stated in Table 9 and Section 10.1 of the LD6805K/29H datasheet.
What is the thermal resistance (Rth(j-a)) of the LD6805K/29H, and how can it be optimized?
The typical junction-to-ambient thermal resistance of the LD6805K/29H is 250 K/W under standard two-layer PCB conditions. Optimization requires solid copper connections from all pins-especially the exposed TAB-to large GND planes, plus multiple vias to inner-layer heat spreaders. Avoid solder-mask over the TAB area, as noted in Section 7 of the LD6805K/29H datasheet.
How does the LD6805K/29H behave when the EN pin is pulled LOW?
When the EN pin is pulled LOW (<0.4 V), the LD6805K/29H enters shutdown mode and places the OUT pin in a high-ohmic (3-state) condition-no internal pull-down transistor is active. This isolates the output rail completely, preventing back-powering or leakage currents into downstream circuits, as confirmed in Sections 1.1 and 2.2 of the LD6805K/29H product data sheet.
Is the LD6805K/29H RoHS compliant and halogen-free?
Yes, the LD6805K/29H is Pb-free, RoHS compliant, and free of halogen and antimony, meeting "dark green" environmental compliance standards per Section 1.2 of the official NXP product data sheet. This is verified in the ordering information and marking tables, confirming suitability for eco-conscious consumer electronics manufacturing.
LD6805K/29H,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):
- 2.9V
- 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/29H,115 FAQ
1.How can I place an order for LD6805K/29H,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/29H,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/29H,115 reliable?
The price and inventory of LD6805K/29H,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/29H,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/29H,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/29H,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/29H,115?
LD6805K/29H,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/29H,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/29H,115?
For technical support, including LD6805K/29H,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/29H,115 requirements.
6.How does Aetrix verify that LD6805K/29H,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/29H,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/29H,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/29H,115?
All LD6805K/29H,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/29H,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/29H,115 part is unused and in its original packaging.
Return procedure for LD6805K/29H,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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