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NXP Semiconductors LD6805K/16H,115
- Part No.:
- LD6805K/16H,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/16H,115.pdf
- Description:
- IC REG LIN 1.6V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:70,000
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Product details
Overview
LD6805K/16H,115 from NXP Semiconductors is a 1.6 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 high-ohmic (3-state) output during disable mode. It operates from 2.3 V to 5.5 V input and delivers ultra-low 40 µVRMS output noise for powering noise-sensitive analog circuitry in portable electronics.
For engineers reviewing the LD6805K/16H,115 datasheet, LD6805K/16H,115 pinout, LD6805K/16H,115 application, or LD6805K/16H,115 equivalent, this page provides verified technical context, validated pin functions, confirmed LDO performance metrics (PSRR, dropout, noise), real-world use cases in mobile interface rails, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The LD6805K/16H,115 integrates a precision voltage reference, error amplifier, and PMOS pass transistor in monolithic silicon. Its high-ohmic disable state isolates the output rail without sinking current, preserving battery charge in standby.
It achieves 75 dB PSRR at 1 kHz via internal feedback compensation and uses a 1 µF X7R ceramic output capacitor for stability across −40 °C to +85 °C ambient. The 150 µs startup time and 0.1 µA shutdown quiescent current support rapid power sequencing in battery-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.6 V ±2% over −40 °C to +85 °C; enables direct powering of 1.6 V I/O domains without external resistive feedback. |
| Dropout Voltage | 250 mV at 150 mA load; allows operation with only 1.85 V input, maximizing battery runtime in single-cell Li-ion or Li-poly systems. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output Noise | 40 µVRMS (10 Hz–100 kHz); meets low-noise requirements for ADC references and RF front-end biasing. |
| Quiescent Current | 0.1 µA in shutdown (EN ≤ 0.4 V); minimizes leakage current during deep sleep modes in always-on sensors. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V GPIO control without level-shifting. |
| Package | DFN1010C-4 (SOT1194-1), 1 × 1 × 0.55 mm; supports ultra-dense PCB layouts in smartphones and wearables. |
Pinout & Package
DFN1010C-4 (SOT1194-1) plastic thermal-enhanced ultra-thin package with 4 terminals; body dimensions 1.0 × 1.0 × 0.55 mm; exposed thermal pad (TAB) on underside connected internally to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 1.6 V to load; high-ohmic (3-state) when EN = LOW, enabling rail isolation without discharge path. |
| 2 - GND | Supply ground reference | Primary return path for load current and internal bias; TAB must be soldered to PCB GND plane for optimal thermal performance. |
| 3 - EN | Active-HIGH enable input | Logic-controlled ON/OFF; drives internal shutdown circuitry; accepts 1.1–5.5 V logic levels directly from MCU GPIO. |
| 4 - IN | Unregulated input voltage supply | Accepts 2.3–5.5 V input; requires local 1 µF ceramic decoupling capacitor placed within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| High-ohmic disable state | Output floats to preserve downstream capacitance and prevent back-powering of disabled circuits. |
| Ultra-low output noise | 40 µVRMS (10 Hz–100 kHz) enables clean power for precision analog signal chains without additional filtering. |
| 75 dB PSRR at 1 kHz | Rejects ripple from noisy switchers (e.g., buck converters) feeding the same battery rail, reducing need for extra LC stages. |
| 150 µs startup time | Enables fast wake-up from low-power states in real-time sensor hubs and always-on voice interfaces. |
| ESD robustness | 6 kV HBM rating ensures reliability during board assembly and end-user handling in consumer handheld devices. |
Applications
| Smartphone Baseband I/O Rail | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powering 1.6 V I/O interface between application processor and cellular modem in compact smartphone designs. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO providing regulated 1.6 V supply with rail isolation during modem sleep cycles. Use Value: Prevents cross-talk between high-speed digital signaling and sensitive RF receive paths by suppressing input ripple and enabling clean power gating. |
Use Scenario: Supplying bias voltage to CMOS image sensor analog front-end in mobile digital still cameras. IC Role / Device Role / Timing Role: Ultra-low-noise LDO delivering stable 1.6 V to sensor pixel array and column amplifiers during exposure readout. Use Value: Reduces temporal noise and fixed-pattern noise in captured images by maintaining <40 µVRMS supply noise floor. |
| Portable Media Player Audio Codec | Wearable Health Sensor Reference |
Use Scenario: Generating clean 1.6 V reference for stereo audio DAC/ADC in battery-powered media players. IC Role / Device Role / Timing Role: High-PSRR LDO rejecting noise from shared system rail while supporting rapid volume control transitions. Use Value: Eliminates audible switching artifacts and improves SNR by >80 dB through 75 dB PSRR and minimal output impedance. |
Use Scenario: Providing precision 1.6 V supply to ECG/PPG analog signal conditioning circuitry in compact wearable health monitors. IC Role / Device Role / Timing Role: Low-quiescent-current LDO with 0.1 µA shutdown enabling multi-week battery life in intermittent-sampling mode. Use Value: Extends operational lifetime by minimizing standby leakage while maintaining rail integrity during sensor activation bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0516PDBVR | 1.6 V fixed output, 200 mA rating, 170 mV dropout at 200 mA, 65 dB PSRR at 1 kHz, SOT-23-5 package (2.9 × 1.6 mm) | Larger footprint and lower PSRR reduce suitability for ultra-compact, noise-critical mobile designs where space and ripple rejection are constrained. | Select when higher output current headroom is required and board area permits larger SOT-23-5 layout. |
| MCP1700T-1602E/TT | 1.6 V fixed output, 250 mA rating, 600 mV dropout at 250 mA, 55 dB PSRR at 1 kHz, SOT-23-3 package (2.9 × 1.3 mm) | Higher dropout and lower PSRR limit usable input range and noise immunity in battery-powered systems operating near end-of-discharge voltage. | Select for cost-sensitive industrial applications where 1.6 V rail stability is less critical than absolute BOM cost. |
Compared with TPS7A0516PDBVR and MCP1700T-1602E/TT, the LD6805K/16H,115 offers superior PSRR (75 dB vs. ≤65 dB) and lower dropout (250 mV vs. ≥600 mV) in a 60% smaller footprint-critical for miniaturized portable electronics requiring both noise resilience and space efficiency.
Availability
LD6805K/16H,115 is available at Aetrix Electronics and suitable for smartphone baseband power, camera sensor biasing, portable audio codec supplies, and wearable health sensor references requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LD6805K/16H,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 mobile applications.
The LD6805 series belongs to NXP's ultra-miniature, high-PSRR LDO product line designed specifically for power integrity in space-constrained portable electronics where low noise, fast transient response, and rail isolation are mandatory.
FAQ
What is the exact output voltage tolerance of the LD6805K/16H,115 over temperature?
The LD6805K/16H,115 delivers 1.6 V output with ±2% tolerance over the full operating temperature range of −40 °C to +85 °C. At +25 °C, the variation tightens to ±0.5%, ensuring precise voltage delivery for 1.6 V I/O standards in mobile processors and sensors. This specification is confirmed in Table 8 of the official NXP datasheet Rev. 2.
Does the LD6805K/16H,115 require an external output capacitor, and what value is recommended?
Yes, the LD6805K/16H,115 requires an external output capacitor for stability. The datasheet specifies a minimum of 0.7 µF and recommends 1.0 µF X7R ceramic with ESR between 5 mΩ and 500 mΩ. Using 1 µF ensures optimal transient response and meets the 150 µs startup time spec under 150 mA load. Deviating below 0.7 µF risks oscillation or poor regulation.
How does the high-ohmic disable mode of the LD6805K/16H,115 differ from auto-discharge variants like LD6805K/16P?
The LD6805K/16H,115 enters a high-ohmic (3-state) output state when disabled, isolating the output rail completely. In contrast, LD6805K/16P activates an internal pull-down transistor (Rpd ≈ 100 Ω) to actively discharge downstream capacitance. This makes LD6805K/16H,115 ideal for systems where rail retention or zero discharge current is required-such as preserving state in powered-off peripherals.
What thermal performance can be expected from the LD6805K/16H,115 in a standard two-layer PCB layout?
In a standard two-layer PCB per datasheet conditions (Tamb = 25 °C), the LD6805K/16H,115 exhibits a typical junction-to-ambient thermal resistance (Rth(j-a)) of 250 K/W. To achieve this, the exposed thermal pad (TAB) must be solidly connected to a dedicated GND copper pour with ≥4 thermal vias. Without proper thermal land design, Rth(j-a) may exceed 350 K/W, limiting safe continuous current to <100 mA at +85 °C ambient.
Is the LD6805K/16H,115 RoHS compliant and halogen-free?
Yes, the LD6805K/16H,115 is fully RoHS compliant and free of halogen and antimony, meeting "dark green" compliance requirements. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). This is explicitly stated in Section 1.2 of the NXP product data sheet Rev. 2.
LD6805K/16H,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):
- 1.6V
- 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/16H,115 FAQ
1.How can I place an order for LD6805K/16H,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/16H,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/16H,115 reliable?
The price and inventory of LD6805K/16H,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/16H,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/16H,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/16H,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/16H,115?
LD6805K/16H,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/16H,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/16H,115?
For technical support, including LD6805K/16H,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/16H,115 requirements.
6.How does Aetrix verify that LD6805K/16H,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/16H,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/16H,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/16H,115?
All LD6805K/16H,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/16H,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/16H,115 part is unused and in its original packaging.
Return procedure for LD6805K/16H,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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