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NXP Semiconductors LD6805K/28H,115
- Part No.:
- LD6805K/28H,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/28H,115.pdf
- Description:
- IC REG LIN 2.8V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,819
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Product details
Overview
LD6805K/28H,115 from NXP Semiconductors is a fixed 2.8 V, 150 mA ultra-low-noise LDO regulator with 75 dB PSRR at 1 kHz, 250 mV dropout at full load, and high-ohmic (3-state) output during disable mode. It operates from 2.3 V to 5.5 V input and targets power-sensitive analog/digital interfaces in portable electronics.
For engineers reviewing the LD6805K/28H,115 datasheet, LD6805K/28H,115 pinout, LD6805K/28H,115 application, or LD6805K/28H,115 equivalent, key selection criteria include its 40 µVRMS output noise, 150 µs startup time, DFN1010C-4 (1 × 1 mm) thermal-enhanced package, and compatibility with 0.7–1.0 µF X7R output capacitors for stable operation in space-constrained mobile designs.
Technical Context
The LD6805K/28H,115 integrates a precision voltage reference, error amplifier, and PMOS pass transistor in monolithic silicon. Its high-ohmic disable state isolates the output without sinking current, preserving downstream circuit integrity during power sequencing.
Designed for low-noise analog rails, it achieves 75 dB PSRR at 1 kHz via internal compensation and optimized loop dynamics, while maintaining stability with minimal 0.7 µF output capacitance and ESR between 5 mΩ and 500 mΩ - enabling use with compact ceramic capacitors in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over −40 °C to +85 °C ambient; ensures stable biasing for 2.8 V logic or analog sensors. |
| Max Output Current | 150 mA continuous; supports moderate-power RF modules, audio codecs, or display drivers without thermal derating on standard PCBs. |
| Dropout Voltage | 250 mV at 150 mA; enables regulation from 3.05 V input, maximizing battery runtime in single-cell Li-ion or Li-poly systems. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from DC-DC converters feeding the LDO input, critical for ADC reference or PLL supply rails. |
| Output Noise | 40 µVRMS (10 Hz–100 kHz); minimizes jitter in clock buffers and SNR degradation in precision amplifiers. |
| Quiescent Current | 0.1 µA typical in shutdown; reduces standby leakage in always-on subsystems like real-time clocks or wake-up controllers. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V or 3.3 V GPIOs for clean digital control without level-shifting. |
Pinout & Package
LD6805K/28H,115 is housed in a thermally enhanced DFN1010C-4 (SOT1194-1) plastic package measuring 1.0 × 1.0 × 0.55 mm, with exposed thermal pad (TAB) connected internally to GND for improved heat dissipation. The package is Pb-free, RoHS-compliant, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 2.8 V; requires 0.7–1.0 µF X7R capacitor with 5–500 mΩ ESR for stability and transient response. |
| 2 - GND | Supply ground reference | Primary return path; TAB must be connected to GND plane for optimal thermal performance (Rth(j-a) ≈ 250 K/W). |
| 3 - EN | Active-HIGH enable input | Drives regulator ON when ≥1.1 V; pulls output to high-impedance state when <0.4 V, enabling safe power sequencing. |
| 4 - IN | Unregulated input voltage supply | Accepts 2.3–5.5 V; transient-rated to +6.0 V for 4 ms; requires local 1 µF decoupling capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-high PSRR | 75 dB at 1 kHz enables clean power delivery to noise-sensitive analog circuits adjacent to noisy digital domains. |
| Low output noise | 40 µVRMS (10 Hz–100 kHz) preserves signal integrity in precision data converters and RF front-end biasing. |
| Fast startup | 150 µs turn-on time supports dynamic power management in applications requiring rapid rail activation. |
| High-ohmic disable | 3-state output during shutdown prevents back-feeding and unintended loading of downstream circuits. |
| ESD robustness | 6 kV HBM rating protects against handling damage during assembly and field operation in consumer environments. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplies 2.8 V to baseband processor I/O banks in LTE smartphones where DC-DC converter ripple must be suppressed. IC Role / Device Role / Timing Role: Low-noise post-regulator providing clean, sequenced power to interface logic during modem boot and sleep transitions. Use Value: 75 dB PSRR rejects 1 MHz switching noise from primary buck converter, preventing bit errors in high-speed serial links. |
Use Scenario: Powers CMOS image sensor analog front-end in compact digital still cameras. IC Role / Device Role / Timing Role: Stable 2.8 V bias source with fast startup enabling rapid camera wake-from-sleep and frame capture readiness. Use Value: 40 µVRMS noise ensures >70 dB SNR in 12-bit image pipelines; 150 µs startup meets sub-10 ms system wake requirements. |
| Portable Media Player Audio DAC | Personal Navigation Device GPS Front-End |
Use Scenario: Delivers ultra-low-noise 2.8 V to stereo audio DAC in battery-powered media players. IC Role / Device Role / Timing Role: Precision LDO supplying reference and analog sections of audio codec ICs, isolated during playback pause. Use Value: High-ohmic disable prevents pop/click artifacts during playback stop/start; 250 mV dropout extends usable battery range. |
Use Scenario: Provides regulated 2.8 V to GPS RF receiver LNA and downconverter in handheld navigation units. IC Role / Device Role / Timing Role: Low-ripple, low-noise supply rail ensuring consistent GPS sensitivity and acquisition time under varying battery voltage. Use Value: 75 dB PSRR maintains −160 dBm sensitivity despite shared PCB with MCU and display drivers; 0.1 µA shutdown current extends idle battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP114AMX280TBG | 2.8 V, 150 mA, 200 mV dropout, 65 dB PSRR @ 1 kHz, SOT-563 package (1.6 × 1.6 mm) | Larger footprint; lower PSRR reduces noise rejection in high-frequency mixed-signal systems | Choose when board area allows larger package and PSRR >70 dB is not required. |
| MCP1703T-2802E/MB | 2.8 V, 250 mA, 600 mV dropout, 55 dB PSRR @ 1 kHz, SOT-23-5 package | Higher dropout limits use below 3.4 V input; lower PSRR compromises noise-sensitive analog rails | Select only if higher output current is needed and input voltage margin exceeds 0.6 V. |
Compared with NCP114AMX280TBG and MCP1703T-2802E/MB, LD6805K/28H,115 delivers superior PSRR and lower dropout in a 1 mm² footprint - making it optimal for miniaturized, noise-critical portable applications where input headroom and spectral purity are constrained.
Availability
LD6805K/28H,115 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, and portable media player audio DAC applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LD6805K/28H,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 was designed specifically for ultra-compact, low-noise power management in portable electronics - emphasizing miniaturization (1 × 1 mm DFN), high PSRR, and low quiescent current for extended battery life in space-constrained devices.
FAQ
What is the output voltage tolerance of LD6805K/28H,115 over temperature?
The LD6805K/28H,115 maintains ±2% output voltage accuracy over −40 °C to +85 °C ambient temperature, with tighter ±0.5% typical variation at +25 °C. This ensures reliable operation for 2.8 V logic interfaces and analog sensors without external trimming, as confirmed in Table 8 of the NXP product data sheet Rev. 2.
Does LD6805K/28H,115 require an input capacitor?
Yes - while not strictly mandatory for stability, a 1 µF ceramic input capacitor placed close to the IN pin of LD6805K/28H,115 is recommended to suppress high-frequency noise and transient spikes from upstream power sources. This improves PSRR performance and prevents potential oscillation under dynamic load conditions.
What is the thermal resistance (Rth(j-a)) of LD6805K/28H,115 in standard layout?
The typical junction-to-ambient thermal resistance of LD6805K/28H,115 is 250 K/W when mounted on a two-layer PCB with the exposed thermal pad (TAB) solidly connected to a GND plane. Performance degrades significantly if the TAB is left unconnected or if insufficient copper area is used for heat spreading.
Can LD6805K/28H,115 be used with tantalum output capacitors?
No - LD6805K/28H,115 is optimized for ceramic capacitors with ESR between 5 mΩ and 500 mΩ. Tantalum capacitors typically exhibit higher ESR and risk instability or excessive overshoot during load transients. X7R or X5R MLCCs meeting the 0.7–1.0 µF and ESR specifications are required for guaranteed stability.
What is the shutdown current of LD6805K/28H,115?
The LD6805K/28H,115 draws only 0.1 µA typical quiescent current when disabled (EN < 0.4 V), with a maximum of 1 µA across temperature. This ultra-low shutdown current makes it ideal for always-on subsystems such as real-time clocks, wake-up timers, or sensor hubs in battery-powered devices.
LD6805K/28H,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- 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/28H,115 FAQ
1.How can I place an order for LD6805K/28H,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/28H,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/28H,115 reliable?
The price and inventory of LD6805K/28H,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/28H,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/28H,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/28H,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/28H,115?
LD6805K/28H,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/28H,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/28H,115?
For technical support, including LD6805K/28H,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/28H,115 requirements.
6.How does Aetrix verify that LD6805K/28H,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/28H,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/28H,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/28H,115?
All LD6805K/28H,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/28H,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/28H,115 part is unused and in its original packaging.
Return procedure for LD6805K/28H,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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