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NXP Semiconductors LD6806TD/29P,125
- Part No.:
- LD6806TD/29P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6806TD/29P,125.pdf
- Description:
- IC REG LINEAR 2.9V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:36,000
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Product details
Overview
LD6806TD/29P,125 from NXP Semiconductors is a 2.9 V, 200 mA ultra-low-dropout linear regulator in SOT753 (TSOP5) package with 80 mV typical dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and active-HIGH enable pin. It delivers stable low-noise power for voltage-sensitive analog circuitry in space-constrained mobile applications.
For engineers reviewing the LD6806TD/29P,125 datasheet, LD6806TD/29P,125 pinout, LD6806TD/29P,125 application, or LD6806TD/29P,125 equivalent, key selection criteria include its low-ohmic pull-down output stage during disable, thermal shutdown with 20 K hysteresis, ±0.5% output accuracy at +25 °C, and compatibility with 1 µF X7R ceramic output capacitors.
Technical Context
The LD6806TD/29P,125 integrates a PMOS pass transistor with internal reference generator, overcurrent protection, and thermal watchdog circuitry. Its enable input accepts 1.4 V to 5.5 V logic-high signals and exhibits 0.4 V max low-level threshold.
Unlike the H-suffix variants, the P-suffix implements an integrated pull-down switch (100 Ω typical) that actively discharges the output node during disable, preventing floating rail conditions in multi-rail systems. The device operates across −40 °C to +85 °C ambient with junction temperature limited to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 2.9 V nominal; ±0.5% tolerance at +25 °C ensures precision biasing for RF front-ends and ADC references |
| Dropout voltage | 80 mV typical at 200 mA; enables operation with VIN as low as 2.98 V, critical for single-cell Li-ion systems |
| Noise (RMS) | 30 µV over 10 Hz–100 kHz; supports low-noise analog signal chains without external filtering |
| PSRR | −55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters |
| Quiescent current | 70 µA typical at no load; reduces standby power in always-on sensor nodes |
| Shutdown current | 0.1 µA typical; enables deep-sleep modes in battery-powered devices |
| Enable threshold | VIH = 1.4 V min; compatible with 1.8 V and 3.3 V GPIOs without level-shifting |
Pinout & Package
SOT753 (TSOP5) plastic surface-mounted package: 5-lead gull-wing, 2.7 mm × 3.1 mm × 1.1 mm body, 0.95 mm lead pitch, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply voltage | Accepts 2.3 V to 5.5 V; requires local 1 µF ceramic decoupling capacitor |
| 2 (GND) | Ground reference | Low-impedance return path; must connect directly to PCB ground plane |
| 3 (EN) | Enable control input | Active-HIGH logic; drives internal regulator and pull-down switch when ≥1.4 V |
| 4 (n.c.) | No connection | Internally unconnected; must remain floating or grounded per layout guidelines |
| 5 (OUT) | Regulated output | Delivers 2.9 V at up to 200 mA; includes 100 Ω pull-down to GND when EN = LOW |
Key Features
| Feature | Design Value |
|---|---|
| Low-ohmic output discharge | 100 Ω pull-down switch actively sinks OUT to GND during disable, eliminating need for external bleeder resistors |
| Thermal protection | Shuts down at 160 °C junction temperature with 20 K hysteresis, enabling safe auto-recovery after cooling |
| ESD robustness | 10 kV HBM rating protects against handling damage in automated assembly lines |
| Stable with small capacitors | Guaranteed stability with 1.0 µF X7R ceramic output capacitor (min 0.7 µF), reducing board area vs. larger electrolytics |
| Ultra-low noise | 30 µVRMS noise floor preserves SNR in audio codecs and precision ADCs without additional LDO stages |
Applications
| Mobile RF Front-End Power | Portable Audio Codec Bias |
|---|---|
Use Scenario: Supplying LNA and mixer stages in LTE/Wi-Fi transceivers where supply ripple directly modulates RF output. IC Role / Device Role / Timing Role: Low-noise, fast-startup voltage source delivering clean 2.9 V bias under dynamic load transients. Use Value: 30 µVRMS noise and 55 dB PSRR prevent AM-to-PM conversion and maintain EVM performance. | Use Scenario: Providing reference voltage to stereo audio DACs and headphone amplifiers in smartphones. IC Role / Device Role / Timing Role: Precision 2.9 V rail with ±0.5% accuracy and sub-200 µs startup for rapid audio playback initiation. Use Value: Eliminates audible pop/click by ensuring monotonic output ramp and controlled discharge via pull-down switch. |
| Wearable Sensor Hub Core Supply | IoT Edge Node MCU Core Rail |
Use Scenario: Powering ultra-low-power ARM Cortex-M0+ microcontrollers and MEMS sensors in fitness trackers. IC Role / Device Role / Timing Role: Primary core supply with deep-sleep quiescent current of 0.1 µA and fast wake-up capability. Use Value: Extends battery life beyond 7 days on coin cell while supporting <200 µs system boot from sleep mode. | Use Scenario: Regulating power to BLE SoCs (e.g., nRF52840) requiring stable 2.9 V core voltage during radio transmit bursts. IC Role / Device Role / Timing Role: High-PSSR, low-dropout regulator maintaining voltage during 15 mA peak current pulses. Use Value: 80 mV dropout prevents brown-out during 2.4 GHz TX events; 200 mA rating covers worst-case RF + CPU load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2902E/MB | 2.9 V fixed output; 6 µA quiescent current; no enable pin; 170 mV dropout at 250 mA | Lacks active discharge and enable control; suited for always-on, ultra-low-IQ applications only | Select when enable functionality and output discharge are unnecessary and lowest possible standby current is critical |
| Torex XC6219B292MR-G | 2.9 V fixed output; 15 µA IQ; built-in CE pin; 120 mV dropout at 200 mA; no pull-down switch | Higher dropout limits use in low-VIN systems; lacks active output discharge during disable | Choose when footprint compatibility with SOT-23-5 is required and thermal shutdown hysteresis is not needed |
Compared with MCP1703T-2902E/MB and XC6219B292MR-G, the LD6806TD/29P,125 uniquely combines active-HIGH enable, 100 Ω output pull-down, and 80 mV dropout-enabling reliable rail sequencing and low-VIN operation in compact portable designs.
Availability
LD6806TD/29P,125 is available at Aetrix Electronics and suitable for mobile phone handsets, wearable health monitors, and Bluetooth audio accessories requiring stable component supply with guaranteed long-term availability.
Supply support for LD6806TD/29P,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 markets.
The LD6806 series was designed specifically for miniaturized portable electronics requiring ultra-low-noise, low-dropout regulation with integrated enable and active discharge-targeting space- and power-constrained applications like smartphones and wearables.
FAQ
What is the maximum input voltage rating for LD6806TD/29P,125?
The LD6806TD/29P,125 supports a maximum input voltage of +6.0 V for transient conditions up to 4 ms, with recommended continuous operation between 2.3 V and 5.5 V. Exceeding 6.0 V risks permanent damage due to absolute maximum ratings violation, regardless of duration.
Does LD6806TD/29P,125 require an external output capacitor, and what type is recommended?
Yes, LD6806TD/29P,125 requires a minimum 1.0 µF X7R ceramic capacitor at the output for stability, with ESR between 5 mΩ and 500 mΩ. The datasheet specifies X7R dielectric to ensure capacitance retention across −40 °C to +125 °C operating range and avoid instability from temperature-dependent ESR shifts.
How does the pull-down switch in LD6806TD/29P,125 function during disable?
When the EN pin is driven below 0.4 V, the LD6806TD/29P,125 activates an internal 100 Ω (typical) NMOS pull-down switch between OUT and GND. This actively discharges the output node, preventing floating voltages that could cause unintended biasing or latch-up in downstream circuitry.
What is the thermal resistance (Rth(j-a)) of LD6806TD/29P,125 in its SOT753 package?
The LD6806TD/29P,125 has a typical junction-to-ambient thermal resistance of 125 K/W under standard test conditions (two-layer PCB, 25 °C ambient). Actual Rth(j-a) depends on PCB copper area and via count; adding thermal vias to inner ground planes can reduce effective resistance by up to 30%.
Can LD6806TD/29P,125 be used with a 1.8 V enable signal?
Yes, LD6806TD/29P,125 accepts 1.8 V as a valid HIGH enable signal because its VIH specification is 1.4 V minimum. A 1.8 V GPIO from a 1.8 V domain IC meets this requirement with 0.4 V noise margin, ensuring reliable turn-on without level translation.
LD6806TD/29P,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/29P,125 FAQ
1.How can I place an order for LD6806TD/29P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6806TD/29P,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/29P,125 reliable?
The price and inventory of LD6806TD/29P,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/29P,125 is usually 5 days.
3.What payment methods are accepted for LD6806TD/29P,125?
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4.How is shipping managed for LD6806TD/29P,125?
LD6806TD/29P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6806TD/29P,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/29P,125?
For technical support, including LD6806TD/29P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6806TD/29P,125 requirements.
6.How does Aetrix verify that LD6806TD/29P,125 is sourced from the original manufacturer or authorized distributors?
All LD6806TD/29P,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/29P,125 meets industry standards.
7.What is the process for return or replacement of LD6806TD/29P,125?
All LD6806TD/29P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6806TD/29P,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/29P,125 part is unused and in its original packaging.
Return procedure for LD6806TD/29P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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