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NXP Semiconductors LD6806TD/18H,125
- Part No.:
- LD6806TD/18H,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6806TD/18H,125.pdf
- Description:
- IC REG LINEAR 1.8V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,848
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Product details
Overview
LD6806TD/18H from NXP Semiconductors is a 1.8 V, 200 mA ultra-low-dropout linear regulator in SOT753 (TSOP5) package with 80 mV typical dropout at full load, 30 µV RMS output noise (10 Hz–100 kHz), and active-HIGH enable pin. It delivers stable low-noise power for analog/digital interfaces in space-constrained mobile devices such as smartphones and media players.
For engineers reviewing the LD6806TD/18H datasheet, LD6806TD/18H pinout, LD6806TD/18H application, or LD6806TD/18H equivalent, key selection criteria include its high-ohmic (3-state) output during disable, thermal shutdown at 160 °C, ±0.5 % output voltage accuracy at +25 °C, and compatibility with 1 µF X7R ceramic output capacitors.
Technical Context
The LD6806TD/18H uses a monolithic silicon regulator design with internal reference generator, thermal protection, and overcurrent limiting. Its enable input (VEN) has defined HIGH/LOW thresholds (VIH ≥ 1.4 V, VIL ≤ 0.4 V), independent of input voltage.
It operates across −40 °C to +85 °C ambient, supports input voltages from 2.3 V to 5.5 V, and maintains regulation with load currents up to 200 mA. The high-ohmic output state (disabled) eliminates backfeed and simplifies power sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.5 % accuracy at +25 °C - ensures precise biasing for 1.8 V I/O domains and low-voltage logic. |
| Dropout Voltage | 80 mV typical at 200 mA - enables operation with minimal VIN–VOUT headroom, improving battery runtime in portable systems. |
| PSRR | −55 dB at 1 kHz - suppresses ripple from noisy switching supplies feeding the LDO input. |
| Output Noise | 30 µV RMS (10 Hz–100 kHz) - critical for powering RF transceivers, ADCs, and audio codecs without introducing jitter or distortion. |
| Quiescent Current | 70 µA typical at no load - minimizes standby power in always-on subsystems like real-time clocks or sensor hubs. |
| Enable Threshold | VIH ≥ 1.4 V, VIL ≤ 0.4 V - compatible with standard 1.8 V/3.3 V GPIOs without level-shifting. |
| Thermal Shutdown | 160 °C with 20 K hysteresis - protects against sustained overload or poor PCB thermal design while allowing safe recovery. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mounted package: 5-lead gull-wing, body size 3.0 mm × 2.5 mm × 1.1 mm, pitch 0.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply voltage input | Accepts 2.3 V to 5.5 V; requires local 1 µF input capacitor for stability and transient response. |
| 2 (GND) | Supply ground | Primary return path; must connect to low-impedance ground plane to minimize noise coupling and thermal resistance. |
| 3 (EN) | Device enable input; active HIGH | Drives regulator ON when ≥1.4 V; pulls output to high-impedance state when <0.4 V - enables controlled power sequencing. |
| 4 (n.c.) | Not connected | No internal connection; must be left floating or tied to GND per layout best practice - no routing or copper fill required. |
| 5 (OUT) | Regulator output voltage | Delivers regulated 1.8 V; requires 1 µF X7R ceramic capacitor with ESR 5–500 mΩ for loop stability and transient performance. |
Key Features
| Feature | Design Value |
|---|---|
| High-ohmic output during disable | Prevents backfeeding into powered-down rails and eliminates need for external blocking diodes in multi-supply systems. |
| Low 30 µV RMS noise | Enables clean power delivery to noise-sensitive analog blocks (e.g., PLLs, RF front-ends) without additional filtering. |
| 200 µs startup time | Supports fast wake-up sequences in battery-powered devices where rapid system responsiveness is required. |
| 10 kV HBM ESD protection | Meets IEC 61340-3-1 requirements - reduces need for external ESD protection on enable and output lines. |
| Thermal and current limiting | Integrated protection prevents latch-up or damage during short-circuit or high-temperature conditions without external circuitry. |
Applications
| Mobile Phone Baseband Power | Wearable Sensor Hub Supply |
|---|---|
Use Scenario: Powers baseband processor I/O banks requiring tightly regulated 1.8 V supply with minimal noise coupling from shared PMIC rails. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering clean 1.8 V to interface logic, decoupling switch-mode supply ripple. Use Value: 30 µV RMS noise and −55 dB PSRR prevent bit errors in high-speed serial links (e.g., MIPI D-PHY) and reduce RF desense. | Use Scenario: Supplies ultra-low-power MCU and MEMS sensors in compact fitness trackers where board area and quiescent current are critical. IC Role / Device Role / Timing Role: Primary 1.8 V rail generator with enable control synchronized to motion-detection wake events. Use Value: 70 µA quiescent current and 200 µs startup extend battery life while enabling sub-100 ms system wake-up latency. |
| Portable Media Player Audio Codec | IoT Edge Node RF Transceiver Bias |
Use Scenario: Provides dedicated low-noise 1.8 V supply to stereo audio codec DAC/ADC sections in handheld music players. IC Role / Device Role / Timing Role: Analog-domain LDO isolating sensitive audio circuitry from digital supply noise. Use Value: 30 µV RMS noise directly translates to >100 dB SNR in 24-bit audio paths, eliminating audible hiss or distortion. | Use Scenario: Supplies 1.8 V bias to BLE/Wi-Fi transceiver RF front-end in battery-operated smart home sensors. IC Role / Device Role / Timing Role: Enable-controlled power domain that shuts down transceiver during sleep cycles. Use Value: High-ohmic disable state prevents leakage through RF matching networks, reducing deep-sleep current by >1 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0518PDBVR | Lower quiescent current (25 µA), same 1.8 V output, but only 200 mA max and no thermal hysteresis. | Lacks temperature watchdog hysteresis and has lower PSRR (−45 dB @ 1 kHz); less robust in thermally variable environments. | Preferred where ultra-low IQ dominates over thermal resilience and noise performance. |
| MCP1700T-1802E/MB | 1.8 V fixed, 250 mA, but higher dropout (178 mV @ 250 mA) and higher noise (40 µV RMS). | Higher dropout limits use with Li-ion batteries below 3.0 V; higher noise impacts RF/analog signal integrity. | Cost-optimized alternative where board space and noise are secondary to BOM cost. |
Compared with TPS7A0518PDBVR and MCP1700T-1802E/MB, LD6806TD/18H provides superior noise suppression and thermal safety margin at the expense of slightly higher quiescent current - making it optimal for noise-critical, thermally demanding portable applications.
Availability
LD6806TD/18H is available at Aetrix Electronics and suitable for mobile phone handsets, wearable sensor hubs, portable media players, and IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for LD6806TD/18H 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 LD6806 series was designed specifically for miniaturized portable electronics requiring ultra-low-noise, low-dropout regulation in wafer-level and leadless packages - targeting space-constrained, battery-powered applications.
FAQ
What is the maximum input voltage rating for LD6806TD/18H?
The absolute maximum input voltage for LD6806TD/18H is +6.0 V for 4 ms transients, with recommended operating range from 2.3 V to 5.5 V. Exceeding 5.5 V continuously risks exceeding thermal limits or triggering internal protection circuits, potentially degrading long-term reliability. Always maintain VIN within the specified operating window for stable 1.8 V output regulation.
Does LD6806TD/18H require an external output capacitor, and what type is recommended?
Yes, LD6806TD/18H requires a minimum 1.0 µF X7R ceramic output capacitor with ESR between 5 mΩ and 500 mΩ for stability and transient response. The datasheet specifies X7R dielectric to ensure capacitance retention across −40 °C to +125 °C, and tolerance of ±30 % or better. Using smaller or non-X7R types may cause oscillation or degraded load regulation.
How does the high-ohmic output state function in LD6806TD/18H during disable?
When LD6806TD/18H is disabled via the EN pin (VEN < 0.4 V), the OUT pin enters a high-impedance (3-state) condition - effectively disconnecting the output from the internal pass transistor. This prevents backfeeding into downstream circuits, eliminates reverse current flow, and allows safe power sequencing in multi-rail systems without external isolation components.
What is the thermal resistance (Rth(j-a)) of LD6806TD/18H in its SOT753 package?
The junction-to-ambient thermal resistance (Rth(j-a)) for LD6806TD/18H in SOT753 package is 125 K/W under standard test conditions (two-layer PCB, Tamb = 25 °C). Actual performance depends on PCB copper area and thermal vias; using solid ground connections and thermal pads can reduce effective Rth(j-a) significantly in production layouts.
Is LD6806TD/18H RoHS compliant and halogen-free?
Yes, LD6806TD/18H is Pb-free, RoHS compliant, and free of halogen and antimony - meeting "dark green" compliance standards. It is qualified per NXP's NX2-00001 Quality and Reliability Specification for consumer applications, with moisture sensitivity level (MSL) appropriate for standard reflow processes.
LD6806TD/18H,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.13V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
LD6806TD/18H,125 FAQ
1.How can I place an order for LD6806TD/18H,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6806TD/18H,125 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 LD6806TD/18H,125 reliable?
The price and inventory of LD6806TD/18H,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6806TD/18H,125 is usually 5 days.
3.What payment methods are accepted for LD6806TD/18H,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6806TD/18H,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6806TD/18H,125?
LD6806TD/18H,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6806TD/18H,125 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 LD6806TD/18H,125?
For technical support, including LD6806TD/18H,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6806TD/18H,125 requirements.
6.How does Aetrix verify that LD6806TD/18H,125 is sourced from the original manufacturer or authorized distributors?
All LD6806TD/18H,125 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 LD6806TD/18H,125 meets industry standards.
7.What is the process for return or replacement of LD6806TD/18H,125?
All LD6806TD/18H,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6806TD/18H,125, 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 LD6806TD/18H,125 part is unused and in its original packaging.
Return procedure for LD6806TD/18H,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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