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NXP Semiconductors LD6836TD/18P,125
- Part No.:
- LD6836TD/18P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/18P,125.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,111
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Product details
Overview
LD6836TD/18P,125 from NXP Semiconductors is a 1.8 V fixed-output, 300 mA ultra-low-dropout linear regulator in SOT753 (SOT23-5 compatible) package, featuring 100 mV typical dropout at full load, 30 µV RMS output noise (10 Hz–100 kHz), and auto-discharge functionality via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and is deployed in power rails for mobile baseband processors and camera sensor modules.
For engineers reviewing the LD6836TD/18P,125 datasheet, LD6836TD/18P,125 pinout, LD6836TD/18P,125 application, or LD6836TD/18P,125 equivalent, this page delivers verified electrical specs, thermal behavior, enable timing, PSRR performance, and real-world design implications for portable low-noise LDO selection.
Technical Context
The LD6836TD/18P,125 implements a PMOS pass transistor architecture enabling ultra-low dropout (100 mV typ. @ 300 mA) and stable regulation down to 1.8 V output. Its internal reference and error amplifier deliver ±0.5% output accuracy at 25 °C and ±3% over −40 °C to +85 °C ambient.
It integrates active auto-discharge via a 100 Ω pull-down transistor on the OUT pin when disabled (EN < 0.4 V), ensuring rapid output voltage decay (300 µs typical shutdown time). The device includes over-temperature shutdown (160 °C) and current limiting (600 mA short-circuit protection).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±0.5% at 25 °C; supports precision analog/digital core supply with minimal headroom |
| Dropout Voltage | 100 mV typical at 300 mA; enables operation from 1.9 V input - critical for single-cell Li-ion or Li-poly battery systems |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding noisy power domains |
| Output Noise | 30 µV RMS (10 Hz–100 kHz); ensures clean bias for RF front-ends and high-resolution ADCs |
| Quiescent Current | 0.1 µA typical in shutdown; extends battery life in always-on standby modes |
| Enable Threshold | VIH = 1.1 V min; compatible with 1.8 V GPIO logic without level-shifting |
| Thermal Resistance | Rth(j-a) = 125 K/W; requires minimal PCB copper area for thermal management in compact layouts |
Pinout & Package
SOT753 plastic surface-mounted package (5-lead, 1.3 mm × 2.5 mm × 1.1 mm body), RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input voltage | Accepts 2.3 V–5.5 V unregulated supply; must be decoupled with ≥0.7 µF X7R ceramic capacitor |
| 2 - GND | Supply ground | Low-impedance return path; connects directly to PCB ground plane for noise control and thermal dissipation |
| 3 - EN | Enable input (active HIGH) | Logic-controlled ON/OFF; VIH ≥1.1 V activates regulator; VIL ≤0.4 V disables with auto-discharge |
| 4 - n.c. | Not connected | No internal connection; must remain floating or tied to GND per layout best practice |
| 5 - OUT | Regulator output voltage | Delivers regulated 1.8 V; includes integrated 100 Ω pull-down transistor for fast discharge when disabled |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor on OUT pin enables rapid voltage decay (<300 µs) during disable - eliminates need for external discharge circuitry |
| Ultra-low noise output | 30 µV RMS noise (10 Hz–100 kHz) supports noise-sensitive loads like RF transceivers and precision sensors without additional filtering |
| High PSRR at low frequency | 55 dB rejection at 1 kHz mitigates ripple from buck converter switching frequencies and their harmonics |
| Robust protection suite | Includes over-temperature shutdown (160 °C), current limiting (600 mA), and 10 kV HBM ESD rating - enhances field reliability in handheld devices |
| Wide input voltage range | 2.3 V–5.5 V operation accommodates diverse sources: single-cell Li-ion (2.7–4.2 V), USB (4.75–5.25 V), or boosted coin cells |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplies 1.8 V core voltage to application processor I/O banks and modem subsystems in space-constrained smartphone mainboards. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering stable rail with fast transient response and auto-discharge during sleep mode transitions. Use Value: Enables >95% retention of battery capacity in deep-sleep states via 0.1 µA shutdown current and eliminates residual voltage hold-up that could cause logic glitches. | Use Scenario: Powers CMOS image sensor analog front-end (AFE) and column ADC circuits requiring ultra-clean 1.8 V bias in compact digital still cameras. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator with tight output tolerance ensuring consistent pixel response and reduced fixed-pattern noise. Use Value: 30 µV RMS noise and 55 dB PSRR prevent switching artifacts from nearby DC-DC converters from degrading image SNR. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Provides 1.8 V supply to stereo audio codec ICs in battery-powered MP3 players and Bluetooth headphones. IC Role / Device Role / Timing Role: Regulator with fast start-up (150 µs) and precise voltage accuracy supporting dynamic power scaling during playback/pause transitions. Use Value: 150 µs turn-on time ensures no audible pop/click during rapid power cycling; ±0.5% accuracy maintains consistent DAC linearity. | Use Scenario: Delivers clean 1.8 V bias to GPS RF front-end LNAs and mixers in handheld navigation units operating under variable thermal conditions. IC Role / Device Role / Timing Role: Thermally robust LDO with 125 K/W Rth(j-a) and over-temperature protection prevents thermal runaway in sealed enclosures. Use Value: 160 °C thermal shutdown and 20 K hysteresis ensure safe operation across −40 °C to +85 °C ambient without derating. |
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 (250 nA vs. 0.1 µA), same 1.8 V output, but no auto-discharge; SOT-23-5 package | Lacks integrated pull-down; requires external MOSFET or resistor network for discharge in always-on systems | Select when ultra-low IQ dominates over discharge speed; verify external discharge solution fits layout constraints |
| MCP1700T-1802E/MB | Higher dropout (178 mV @ 250 mA), same 1.8 V output, no enable pin or auto-discharge; SOT-23-3 package | Fixed ON operation only; unsuitable for power-gated subsystems requiring controlled sequencing | Choose only for cost-sensitive, non-sequenced rails where enable control and fast discharge are unnecessary |
Compared with TPS7A0518PDBVR and MCP1700T-1802E/MB, LD6836TD/18P,125 uniquely combines 100 mV dropout, 30 µV noise, and integrated auto-discharge in a standard SOT753 footprint - making it optimal for sequenced, battery-sensitive portable designs requiring both precision and fast state transitions.
Availability
LD6836TD/18P,125 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LD6836TD/18P,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 electronics, with leadership in power management and RF technologies.
The LD6836 series was designed specifically for ultra-miniaturized, low-noise, high-efficiency power delivery in portable battery-operated devices - emphasizing dropout minimization, noise suppression, and intelligent enable/discharge control.
FAQ
What is the dropout voltage specification for LD6836TD/18P,125?
The LD6836TD/18P,125 has a typical dropout voltage of 100 mV at 300 mA output current, with a maximum of 200 mV across temperature and process variation. This allows reliable 1.8 V regulation from inputs as low as 1.9 V - essential for extending runtime in single-cell Li-ion systems where input voltage drops below 2.5 V during discharge.
Does LD6836TD/18P,125 include auto-discharge functionality?
Yes, LD6836TD/18P,125 includes an integrated pull-down transistor on the OUT pin that activates when the EN pin is driven LOW (<0.4 V), providing a 100 Ω low-ohmic path to GND. This achieves rapid output discharge in ~300 µs, eliminating residual voltage that could interfere with system reset or power sequencing - no external components required.
What is the recommended output capacitor for LD6836TD/18P,125?
The LD6836TD/18P,125 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin, with ESR between 5 mΩ and 500 mΩ. A 1.0 µF capacitor is recommended for optimal stability and transient response. The capacitor must be placed within 2 mm of the OUT and GND pins to minimize inductance and ensure PSRR and noise performance meet datasheet specifications.
How does the PSRR of LD6836TD/18P,125 compare at different frequencies?
LD6836TD/18P,125 delivers 55 dB PSRR at 1 kHz, optimized for suppressing ripple from switching regulators. PSRR decreases at higher frequencies (e.g., ~35 dB at 100 kHz), reflecting its internal compensation design. For broadband noise suppression, pairing LD6836TD/18P,125 with a ferrite bead and bulk capacitor upstream is recommended - especially in mixed-signal SoC power domains.
Is LD6836TD/18P,125 compatible with lead-free reflow soldering processes?
Yes, LD6836TD/18P,125 is qualified for lead-free reflow soldering per J-STD-020C. Its SOT753 package has a moisture sensitivity level (MSL) of 1 and withstands peak reflow temperatures up to 260 °C. Standard SnAgCu paste profiles with preheat (150–200 °C), soak (180–200 °C), and reflow (235–245 °C peak) are fully compatible - no special handling required beyond standard MSL-1 precautions.
LD6836TD/18P,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):
- 0.2V @ 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/18P,125 FAQ
1.How can I place an order for LD6836TD/18P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/18P,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/18P,125 reliable?
The price and inventory of LD6836TD/18P,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/18P,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/18P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/18P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/18P,125?
LD6836TD/18P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/18P,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/18P,125?
For technical support, including LD6836TD/18P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/18P,125 requirements.
6.How does Aetrix verify that LD6836TD/18P,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/18P,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/18P,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/18P,125?
All LD6836TD/18P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/18P,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/18P,125 part is unused and in its original packaging.
Return procedure for LD6836TD/18P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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