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NXP Semiconductors LD6806TD/29H,125
- Part No.:
- LD6806TD/29H,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6806TD/29H,125.pdf
- Description:
- IC REG LINEAR 2.9V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:36,000
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Product details
Overview
LD6806TD/29H,125 from NXP Semiconductors is a high-ohmic-output ultra-low-dropout linear regulator delivering 2.9 V at up to 200 mA with 80 mV typical dropout voltage at full load, 30 µV RMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz - designed for power-sensitive mobile handset and media player subsystems requiring stable low-noise bias.
For engineers reviewing the LD6806TD/29H,125 datasheet, LD6806TD/29H,125 pinout, LD6806TD/29H,125 application, or LD6806TD/29H,125 equivalent, this page provides verified package mapping (SOT753/TSOP5), confirmed enable-active-HIGH logic, thermal shutdown hysteresis (20 K), and validated alternative options for 2.9 V LDO replacement in space-constrained consumer electronics designs.
Technical Context
The LD6806TD/29H,125 implements a PMOS pass transistor architecture enabling ultra-low dropout operation down to 80 mV at 200 mA while maintaining stability with ≥1 µF ceramic output capacitance. Its internal bandgap reference and error amplifier deliver ±2% output voltage accuracy over −40 °C to +85 °C ambient.
It integrates active protection features including thermal shutdown at 160 °C (with 20 K hysteresis), current limiting (~600 mA short-circuit), and ESD robustness (±10 kV HBM). The high-ohmic (3-state) output during disable ensures no loading of downstream circuitry when EN = LOW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.9 V nominal, ±2% tolerance over temperature and load - ensures stable core/bias rail for 2.8–3.0 V logic or analog blocks. |
| Dropout Voltage | 80 mV typical at 200 mA - enables regulation from 3.0 V input when VIN ≥ 3.0 V, minimizing power loss in battery-powered systems. |
| PSRR | −55 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 30 µV RMS (10 Hz–100 kHz) - supports noise-sensitive RF front-ends and precision ADC references. |
| Quiescent Current | 70–250 µA under load; 0.1–1.0 µA in shutdown - extends battery life in always-on standby modes. |
| Enable Threshold | VIH = 1.4 V min, VIL = 0.4 V max - compatible with 1.8 V and 3.3 V GPIO control without level-shifting. |
| Thermal Shutdown | 160 °C junction trip with 20 K hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mounted package: 5-lead gull-wing, 3.0 mm × 2.5 mm × 1.1 mm body, 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply voltage | Accepts 2.3–5.5 V; requires local 1 µF ceramic decoupling near pin for stability and transient response. |
| 2 (GND) | Power ground reference | Must connect to low-impedance ground plane; shared return path for IN, OUT, and EN affects PSRR and noise. |
| 3 (EN) | Enable control input | Active HIGH; drives internal regulator core; <0.4 V disables device, placing OUT in high-ohmic (3-state) mode. |
| 4 (n.c.) | No-connect terminal | Internally unconnected; must remain floating - no external connection or PCB trace required. |
| 5 (OUT) | Regulated output voltage | Delivers 2.9 V @ ≤200 mA; requires ≥1 µF X7R ceramic capacitor with ESR 5–500 mΩ for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 80 mV at 200 mA enables use with Li-ion battery voltages down to 3.0 V while sustaining full output current. |
| High-ohmic output disable | 3-state output during EN = LOW isolates downstream circuits, preventing back-powering or leakage paths. |
| Low-noise regulation | 30 µV RMS noise supports clean power for RF ICs, audio codecs, and high-resolution ADCs without added filtering. |
| Fast start-up | 200 µs turn-on time allows rapid power sequencing in multi-rail systems with tight timing budgets. |
| Robust protection | Integrated thermal shutdown (160 °C), current limit (~600 mA), and ±10 kV HBM ESD ensure field reliability in handheld environments. |
Applications
| Mobile Phone Baseband Power | Media Player Audio Codec Bias |
|---|---|
Use Scenario: Supplies clean 2.9 V bias to baseband processor I/O banks in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary low-noise LDO for digital interface rails where PSRR >50 dB suppresses DC-DC ripple coupling into sensitive signal paths. Use Value: Enables reliable high-speed data transfer (e.g., USB 2.0 PHY) by maintaining <±2% output regulation across battery discharge (3.6 V → 3.0 V). |
Use Scenario: Powers stereo audio DAC and headphone amplifier in portable MP3 players. IC Role / Device Role / Timing Role: Low-noise post-regulator for analog signal chain, placed after main system DC-DC converter. Use Value: Reduces audible hiss by limiting output noise to 30 µV RMS, meeting SNR >100 dB requirements for 24-bit audio playback. |
| Wearable Sensor Hub Supply | Bluetooth LE SoC Core Rail |
Use Scenario: Provides regulated 2.9 V to MEMS motion sensor fusion hub in smartwatch applications. IC Role / Device Role / Timing Role: Always-on LDO supporting ultra-low-quiescent-current sleep mode (≤1 µA) and fast wake-up (<200 µs). Use Value: Extends coin-cell battery life beyond 12 months by minimizing idle current while ensuring deterministic power-on timing. |
Use Scenario: Delivers 2.9 V core voltage to Bluetooth Low Energy SoC during active advertising and connection intervals. IC Role / Device Role / Timing Role: High-PSSR LDO decoupling RF transceiver from noisy digital supply domains. Use Value: Maintains BLE link stability (RSSI >−70 dBm) by rejecting >55 dB of switching noise from adjacent 3.3 V buck converter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0529PDBVR | 200 mA, 2.9 V fixed, 170 mV dropout (typ), 25 µV RMS noise, SOT-23-5 package | Higher dropout limits usable input range; smaller SOT-23 footprint but lower thermal performance (Rth(j-a) ≈ 225 K/W vs. 125 K/W) | Prefer when board area is critical and input voltage remains ≥3.1 V; verify thermal margin under 200 mA continuous load. |
| MCP1700T-2902E/TT | 250 mA, 2.9 V fixed, 175 mV dropout (typ), 30 µV RMS noise, SOT-23-3 package (no enable) | No enable pin - requires external FET or power switch for sequencing; higher dropout reduces efficiency at low VIN | Select only if enable functionality is unnecessary and cost is primary driver; not suitable for dynamic power gating. |
Compared with TPS7A0529PDBVR and MCP1700T-2902E/TT, LD6806TD/29H,125 offers superior thermal dissipation (125 K/W), lower dropout (80 mV), and guaranteed 3-state output disable - making it optimal for thermally constrained, battery-voltage-tracking, and sequenced-power applications.
Availability
LD6806TD/29H,125 is available at Aetrix Electronics and suitable for mobile handset power management, portable media player biasing, and wearable sensor hub supply requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for LD6806TD/29H,125 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 electronics.
The LD6806 series was developed specifically for miniaturized portable electronics requiring ultra-low-noise, low-dropout regulation in sub-1 mm² packages - targeting mobile phone, media player, and wearable power architectures.
FAQ
What is the maximum input voltage rating for LD6806TD/29H,125?
The absolute maximum input voltage on the IN pin of LD6806TD/29H,125 is +6.0 V for transient conditions up to 4 ms. For continuous operation, the recommended input range is 2.3 V to 5.5 V per the datasheet's operating conditions table. Exceeding 5.5 V continuously risks exceeding thermal limits or triggering internal protection circuits.
Does LD6806TD/29H,125 require an external output capacitor, and what value is recommended?
Yes, LD6806TD/29H,125 requires an external output capacitor for stability. The datasheet specifies a minimum of 1.0 µF ceramic (X7R dielectric preferred), with ESR between 5 mΩ and 500 mΩ. Using less than 1.0 µF may cause oscillation or degraded load transient response, especially under 200 mA step loads.
What happens to the output pin of LD6806TD/29H,125 when the EN pin is driven LOW?
When EN is driven below 0.4 V, LD6806TD/29H,125 enters shutdown mode and places the OUT pin in a high-ohmic (3-state) state - effectively disconnecting the output from the internal pass transistor. This prevents back-feeding or loading of downstream circuits, unlike low-ohmic variants (e.g., LD6806TD/29P) that actively pull OUT to GND.
Is LD6806TD/29H,125 RoHS-compliant and halogen-free?
Yes, LD6806TD/29H,125 is Pb-free, RoHS compliant, and free of halogen and antimony per NXP's "dark green compliant" specification. It meets JESD22-A115C for ESD robustness (±10 kV HBM) and is qualified for consumer applications per NX2-00001 quality standards.
What is the thermal resistance (Rth(j-a)) of LD6806TD/29H,125 in its SOT753 package?
The typical thermal resistance from junction to ambient for LD6806TD/29H,125 in the SOT753 package is 125 K/W under standard test conditions (2-layer PCB, Tamb = 25 °C). Actual performance depends on PCB copper area and via count; design guidelines recommend solid GND connections and thermal vias beneath the exposed pad (if present) to approach this value.
LD6806TD/29H,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 0.13V @ 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/29H,125 FAQ
1.How can I place an order for LD6806TD/29H,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6806TD/29H,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/29H,125 reliable?
The price and inventory of LD6806TD/29H,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/29H,125 is usually 5 days.
3.What payment methods are accepted for LD6806TD/29H,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6806TD/29H,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6806TD/29H,125?
LD6806TD/29H,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6806TD/29H,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/29H,125?
For technical support, including LD6806TD/29H,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6806TD/29H,125 requirements.
6.How does Aetrix verify that LD6806TD/29H,125 is sourced from the original manufacturer or authorized distributors?
All LD6806TD/29H,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/29H,125 meets industry standards.
7.What is the process for return or replacement of LD6806TD/29H,125?
All LD6806TD/29H,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6806TD/29H,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/29H,125 part is unused and in its original packaging.
Return procedure for LD6806TD/29H,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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