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NXP Semiconductors LD6805K/16P,115
- Part No.:
- LD6805K/16P,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
LD6805K/16P,115.pdf
- Description:
- IC REG LIN 1.6V 150MA DFN1010C-4
- Quantity:
- Payment:
- Shipping:
Inventory:60,000
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Product details
Overview
LD6805K/16P,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 auto-discharge functionality via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and delivers ultra-low 40 µVRMS output noise for powering noise-sensitive analog and digital interfaces in portable electronics.
For engineers reviewing the LD6805K/16P,115 datasheet, LD6805K/16P,115 pinout, LD6805K/16P,115 application, or LD6805K/16P,115 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world application mapping - all specific to the LD6805K/16P variant with 1.6 V output and pull-down discharge capability.
Technical Context
The LD6805K/16P,115 integrates a precision voltage reference, error amplifier, and PMOS pass transistor optimized for high PSRR and fast transient response. Its enable circuitry accepts 1.1 V to 5.5 V logic-high signals and achieves 150 µs startup time with 1 µF output capacitance.
Unlike the H-suffix variants, the LD6805K/16P,115 includes an active pull-down transistor (Rpd = 100 Ω typical) that discharges the output during shutdown, eliminating residual voltage hold-up. This architecture supports rapid system power sequencing and meets stringent requirements for mobile interface rails requiring controlled discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.6 V ±2% over −40 °C to +85 °C; enables stable biasing of 1.6 V–1.8 V core/logic circuits without external feedback. |
| Max Output Current | 150 mA continuous; sufficient for powering RF transceivers, sensor signal chains, or microcontroller I/O banks in compact devices. |
| Dropout Voltage | 250 mV at 150 mA; allows operation from 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 DC-DC converters feeding the LDO input, critical for ADC reference or PLL supply rails. |
| Output Noise | 40 µVRMS (10 Hz–100 kHz); ensures clean power for low-noise amplifiers and high-resolution data converters. |
| Quiescent Current | 0.1 µA typical in shutdown mode; reduces standby leakage in always-on subsystems such as real-time clocks or wake-on-event circuits. |
| Enable Threshold | VIH = 1.1 V min; compatible with 1.2 V, 1.8 V, and 3.3 V logic families for flexible system-level control. |
Pinout & Package
LD6805K/16P,115 is housed in a DFN1010C-4 (SOT1194-1) plastic package measuring 1.0 × 1.0 × 0.55 mm with thermal-enhanced exposed tab (GND-connected). The package supports reflow soldering per J-STD-020C lead-free profile and requires minimum 0.7 µF X7R ceramic output capacitance for stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers 1.6 V to load; connects to 1 µF decoupling capacitor and downstream circuitry; pulled low by internal transistor when EN = LOW. |
| 2 - GND | Supply ground reference | Common return path for input, output, and internal circuitry; tab must be connected to PCB ground plane for optimal thermal performance (Rth(j-a) = 250 K/W). |
| 3 - EN | Active-HIGH enable input | Logic-controlled on/off; drives internal regulator and pull-down transistor; VIH ≥ 1.1 V activates regulation and disables discharge path. |
| 4 - IN | Unregulated input voltage supply | Accepts 2.3–5.5 V; requires local 1 µF input capacitor to suppress source impedance and improve PSRR at high frequencies. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor actively discharges OUT pin during shutdown, preventing floating or unintended biasing of downstream circuitry. |
| Ultra-low output noise | 40 µVRMS (10 Hz–100 kHz) enables direct use in precision analog signal paths without additional filtering stages. |
| High PSRR architecture | 75 dB rejection at 1 kHz and strong mid-frequency attenuation (>60 dB up to 100 kHz) isolates sensitive loads from noisy DC-DC sources. |
| Low quiescent current | 35 µA operating current and 0.1 µA shutdown current minimize battery drain in portable applications with intermittent operation. |
| ESD robustness | 6 kV HBM protection on all pins ensures reliability during board assembly and end-user handling without external protection components. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powers baseband processor I/O banks requiring stable 1.6 V rail with fast turn-on and zero residual voltage during sleep mode. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.6 V with auto-discharge to prevent leakage-induced wake events during deep-sleep states. Use Value: Eliminates need for external discharge FET or RC network, reducing BOM count and PCB area while ensuring deterministic power sequencing. |
Use Scenario: Supplies image sensor analog front-end (AFE) where low noise and rapid enable/disable are essential for burst capture and low-light performance. IC Role / Device Role / Timing Role: Low-noise, fast-startup LDO providing clean 1.6 V bias; shutdown timing synchronized with sensor exposure control. Use Value: 40 µVRMS noise prevents fixed-pattern noise in raw image data; 150 µs startup enables sub-millisecond sensor activation. |
| Portable Media Player Audio Codec | Wearable Health Sensor Signal Chain |
|
Use Scenario: Powers stereo audio codec's DAC/ADC section in battery-powered media players, demanding low noise and minimal standby current. IC Role / Device Role / Timing Role: Dedicated low-noise LDO supplying 1.6 V to audio conversion circuitry; enabled only during playback/recording. Use Value: 75 dB PSRR blocks switcher ripple from affecting SNR; 0.1 µA shutdown current extends battery life between usage sessions. |
Use Scenario: Regulates power for optical heart-rate sensor ICs in wearables, where space constraints and thermal limits restrict solution size. IC Role / Device Role / Timing Role: Miniaturized 1.6 V LDO with 1 × 1 mm footprint and thermal-tab grounding, enabling integration into thin-form-factor wristbands. Use Value: Compact DFN package fits tight mechanical envelopes; 250 mV dropout maximizes usable battery voltage range from coin-cell or small Li-ion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B162MR-G | 1.6 V fixed output, 150 mA, 200 mV dropout, but no auto-discharge; PSRR = 65 dB @ 1 kHz; SOT-25 package (2.9 × 2.8 mm). | Lacks pull-down transistor; requires external discharge circuit for same shutdown behavior; larger footprint limits miniaturization. | Select when board space permits larger package and auto-discharge is handled externally or not required. |
| Richtek RT9013-16GB | 1.6 V fixed output, 300 mA, 250 mV dropout, 70 dB PSRR @ 1 kHz, no auto-discharge; DFN1010-4 package (1.0 × 1.0 mm), but no integrated pull-down. | Higher current rating but no discharge function; requires external MOSFET or resistor network to replicate LD6805K/16P,115's auto-discharge behavior. | Choose for higher load margin where discharge is managed separately; verify thermal derating at 300 mA in 1 × 1 mm footprint. |
Compared with XC6219B162MR-G and RT9013-16GB, LD6805K/16P,115 uniquely integrates auto-discharge in the same ultra-compact DFN1010C-4 package, eliminating external components while maintaining best-in-class PSRR and noise performance for space-constrained portable designs.
Availability
LD6805K/16P,115 is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor bias, portable audio codec supply, and other applications requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LD6805K/16P,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 specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in power management, RF, and embedded processing.
The LD6805 series was designed specifically for ultra-miniaturized portable electronics requiring high-PSRR, low-noise, and auto-discharge LDOs in sub-1 mm² packages - targeting next-generation smartphones, wearables, and IoT edge sensors.
FAQ
What is the exact output voltage tolerance of LD6805K/16P,115 across temperature and load?
The LD6805K/16P,115 delivers 1.6 V with ±2% tolerance over −40 °C to +85 °C ambient temperature and 1 mA to 150 mA load current. At +25 °C and 1 mA load, output variation is ±0.5%; under full temperature range, it remains within ±3% for VOUT < 1.8 V, ensuring reliable operation for 1.6 V logic and analog circuits.
Does LD6805K/16P,115 require an external output capacitor, and what are the minimum specifications?
Yes, LD6805K/16P,115 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin for stability, with recommended value of 1.0 µF. Equivalent Series Resistance (ESR) must be between 5 mΩ and 500 mΩ. Using capacitors outside this range may cause oscillation or degraded transient response.
How does the auto-discharge function of LD6805K/16P,115 operate during shutdown?
When the EN pin is driven LOW (< 0.4 V), LD6805K/16P,115 disables regulation and activates an internal 100 Ω pull-down transistor between OUT and GND. This rapidly discharges the output node, preventing residual voltage from interfering with downstream circuitry or causing unintended wake events in low-power modes.
What is the thermal resistance (Rth(j-a)) of LD6805K/16P,115, and how can it be optimized?
The typical junction-to-ambient thermal resistance of LD6805K/16P,115 is 250 K/W under standard two-layer PCB conditions. To optimize thermal performance, connect the exposed thermal tab directly to a solid GND copper pour using multiple vias, and avoid solder-mask coverage under the device - achieving lower effective Rth(j-a) in multi-layer layouts.
Is LD6805K/16P,115 compatible with lead-free reflow soldering processes?
Yes, LD6805K/16P,115 is qualified for lead-free reflow per J-STD-020C. Its DFN1010C-4 package has a volume < 350 mm³ and thickness < 1.6 mm, requiring a peak reflow temperature of 260 °C. A 75 µm stencil thickness is recommended for accurate solder paste deposition during assembly.
LD6805K/16P,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/16P,115 FAQ
1.How can I place an order for LD6805K/16P,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6805K/16P,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/16P,115 reliable?
The price and inventory of LD6805K/16P,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/16P,115 is usually 5 days.
3.What payment methods are accepted for LD6805K/16P,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6805K/16P,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6805K/16P,115?
LD6805K/16P,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6805K/16P,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/16P,115?
For technical support, including LD6805K/16P,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6805K/16P,115 requirements.
6.How does Aetrix verify that LD6805K/16P,115 is sourced from the original manufacturer or authorized distributors?
All LD6805K/16P,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/16P,115 meets industry standards.
7.What is the process for return or replacement of LD6805K/16P,115?
All LD6805K/16P,115 units undergo pre-shipment inspection (PSI). If there is an issue with LD6805K/16P,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/16P,115 part is unused and in its original packaging.
Return procedure for LD6805K/16P,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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