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NXP Semiconductors LD6836TD/29H,125
- Part No.:
- LD6836TD/29H,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/29H,125.pdf
- Description:
- IC REG LINEAR 2.9V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
LD6836TD/29H,125 from NXP Semiconductors is a 2.9 V fixed-output, 300 mA ultra-low-dropout linear regulator in SOT753 package, featuring 100 mV typical dropout at full load, 55 dB PSRR at 1 kHz, and 30 µVRMS output noise (10 Hz–100 kHz). It delivers stable low-noise power for precision analog rails in portable consumer electronics.
For engineers reviewing the LD6836TD/29H,125 datasheet, LD6836TD/29H,125 pinout, LD6836TD/29H,125 application, or LD6836TD/29H,125 equivalent, this page provides verified electrical specs, thermal behavior, enable timing, high-ohmic disable state, and real-world design implications for mobile power rail optimization.
Technical Context
The LD6836TD/29H,125 uses a PMOS pass transistor architecture enabling ultra-low dropout (100 mV typ. @ 300 mA) and high PSRR (−55 dB @ 1 kHz), critical for noise-sensitive RF and ADC supply domains. Its internal bandgap reference and error amplifier ensure ±2% output accuracy over −40 °C to +85 °C ambient.
It integrates active-high enable logic with 1.1 V minimum VIH and 0.4 V maximum VIL, supporting direct interfacing with 1.8 V/3.3 V GPIOs. The high-ohmic (3-state) output during disable prevents backfeeding and enables seamless rail sequencing in multi-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.9 V ±2% over −40 °C to +85 °C; supports stable core/logic rail without external feedback network. |
| Dropout voltage | 100 mV typical at 300 mA load; enables operation down to VIN = 3.0 V, maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding noisy intermediate rails. |
| Output noise | 30 µVRMS (10 Hz–100 kHz); suitable for powering low-noise amplifiers, precision ADCs, and RF synthesizers. |
| Quiescent current | 70–100 µA operating; drops to 0.1 µA in shutdown-critical for always-on sensor nodes and standby power budgets. |
| Enable threshold | VIL ≤ 0.4 V, VIH ≥ 1.1 V; compatible with 1.8 V I/O domains without level-shifting circuitry. |
| Thermal resistance | Rth(j-a) = 125 K/W (SOT753); requires minimal copper area for full 300 mA operation at +85 °C ambient. |
Pinout & Package
SOT753 plastic surface-mounted package (5-lead, SC-74A compatible), dimensions 3.1 mm × 2.7 mm × 1.3 mm, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input voltage | Accepts 2.3 V–5.5 V; must be decoupled with ≥0.7 µF X7R ceramic capacitor close to pin. |
| 2 - GND | Supply ground | Primary return path; requires low-impedance connection to PCB ground plane for noise control and thermal dissipation. |
| 3 - EN | Enable input (active HIGH) | Directly driven by microcontroller GPIO; asserts regulation when >1.1 V; disables output to high-impedance state when <0.4 V. |
| 4 - n.c. | No connection | Internally unconnected; must remain floating-no routing or soldering permitted. |
| 5 - OUT | Regulator output voltage | Delivers regulated 2.9 V; requires ≥0.7 µF output capacitance (X7R, ESR 5–500 mΩ) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| High-ohmic disable state | Output floats to high impedance when EN = LOW-enables clean power sequencing and prevents backfeed in multi-rail systems. |
| Low-noise regulation | 30 µVRMS output noise ensures signal integrity for RF front-ends and audio codecs without additional filtering. |
| Fast start-up time | 150 µs to reach 95% of 2.9 V output-supports rapid wake-up in low-power MCU applications. |
| Integrated protection | Over-temperature shutdown (160 °C) and output current limiting (600 mA short-circuit) prevent damage under fault conditions. |
| ESD robustness | 10 kV HBM ESD rating on all pins-reduces need for external protection in handheld device designs. |
Applications
| Smartphone Baseband Power | Digital Still Camera Sensor Rail |
|---|---|
|
Use Scenario: Powers baseband processor I/O and memory interface in dual-SIM smartphones with tight space constraints. IC Role / Device Role / Timing Role: Low-noise LDO supplying 2.9 V to 1.8 V/3.3 V tolerant interfaces while rejecting noise from shared PMIC switchers. Use Value: 55 dB PSRR at 1 kHz prevents digital switching noise from corrupting sensitive RF receive paths. |
Use Scenario: Supplies image sensor analog core in compact digital still cameras requiring stable, ripple-free bias. IC Role / Device Role / Timing Role: Fixed 2.9 V LDO delivering clean power to CMOS image sensor analog front-end during exposure bursts. Use Value: 30 µVRMS output noise minimizes fixed-pattern noise and improves SNR in low-light imaging. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
|
Use Scenario: Powers stereo audio codec DAC and headphone driver in battery-powered media players. IC Role / Device Role / Timing Role: Ultra-low-noise 2.9 V rail generator with fast enable for on-demand audio playback. Use Value: 150 µs start-up enables immediate audio output after user button press-no perceptible latency. |
Use Scenario: Supplies GPS RF front-end LNA and mixer in handheld navigation devices using single-cell Li-ion. IC Role / Device Role / Timing Role: High-PSRR LDO maintaining 2.9 V under dynamic load while rejecting noise from display backlight drivers. Use Value: 100 mV dropout allows operation down to 3.0 V input-extending usable battery range by ~12% vs. standard LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0529PDBVR | 2.9 V fixed, 200 mA, 170 mV dropout (typ.), 45 dB PSRR @ 1 kHz, SOT-23-5 | Lower current rating and higher dropout limit use in <200 mA loads; lower PSRR reduces noise rejection capability. | Select when cost sensitivity outweighs noise/PSRR requirements and load stays below 200 mA. |
| MCP1700T-2902E/TT | 2.9 V fixed, 250 mA, 175 mV dropout (typ.), 60 dB PSRR @ 1 kHz, SOT-23-5 | Higher PSRR but lower max current and no high-ohmic disable-requires external pull-down for auto-discharge. | Prefer when PSRR >55 dB is mandatory and disable-state output leakage is acceptable. |
Compared with TPS7A0529PDBVR and MCP1700T-2902E/TT, LD6836TD/29H,125 uniquely combines 300 mA drive, 100 mV dropout, 55 dB PSRR, and true high-ohmic disable in one SOT753 package-making it optimal for space-constrained, multi-rail portable systems demanding both performance and sequencing control.
Availability
LD6836TD/29H,125 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor rails, portable media player audio codecs, and personal navigation device GPS front-ends requiring stable component supply with consistent parametric performance across production lots.
Supply support for LD6836TD/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 specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in power management and RF technologies.
The LD6836 series was designed specifically for ultra-miniaturized portable electronics requiring low-noise, low-dropout, and high-PSRR regulation in space-constrained SOT753 and WLCSP packages-targeting next-generation smartphones, wearables, and IoT edge sensors.
FAQ
What is the maximum input voltage rating for LD6836TD/29H,125?
The LD6836TD/29H,125 has an absolute 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 to the internal PMOS pass transistor and reference circuitry. Always include input overvoltage protection if upstream sources may exceed this limit.
Does LD6836TD/29H,125 require an external output capacitor, and what are the specifications?
Yes, LD6836TD/29H,125 requires an external output capacitor of 0.7 µF to 1.0 µF (X7R dielectric, ±30% tolerance), with ESR between 5 mΩ and 500 mΩ. This capacitor ensures loop stability, controls load-transient response, and reduces output ripple. Using values outside this range may cause oscillation or degraded regulation accuracy.
What happens to the output of LD6836TD/29H,125 when the EN pin is pulled LOW?
When EN is pulled LOW (<0.4 V), LD6836TD/29H,125 enters shutdown mode and places its OUT pin in a high-ohmic (3-state) floating condition-no internal pull-up or pull-down is activated. This prevents backfeeding into the output rail and enables safe power sequencing in multi-supply systems without external discharge circuitry.
How does the dropout voltage of LD6836TD/29H,125 compare to similar LDOs in SOT753 package?
LD6836TD/29H,125 delivers 100 mV typical dropout at 300 mA, outperforming most SOT753 LDOs (e.g., 170–200 mV typical). This enables operation with only 3.0 V input for a 2.9 V output-critical for extending runtime in single-cell Li-ion (3.0–4.2 V) applications where every millivolt of headroom matters.
Is LD6836TD/29H,125 RoHS-compliant and lead-free?
Yes, LD6836TD/29H,125 is fully RoHS-compliant, lead-free, and free of halogen and antimony (dark green compliant). It meets JEDEC J-STD-020C moisture sensitivity level 1 and is qualified for reflow soldering per NXP's standard SMT guidelines-no special handling required beyond standard MSL-1 protocols.
LD6836TD/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):
- 0.2V @ 300mA
- Current - Output:
- 300mA
- 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
LD6836TD/29H,125 FAQ
1.How can I place an order for LD6836TD/29H,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/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 LD6836TD/29H,125 reliable?
The price and inventory of LD6836TD/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 LD6836TD/29H,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/29H,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/29H,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/29H,125?
LD6836TD/29H,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/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 LD6836TD/29H,125?
For technical support, including LD6836TD/29H,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/29H,125 requirements.
6.How does Aetrix verify that LD6836TD/29H,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/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 LD6836TD/29H,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/29H,125?
All LD6836TD/29H,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/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 LD6836TD/29H,125 part is unused and in its original packaging.
Return procedure for LD6836TD/29H,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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