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NXP Semiconductors LD6836TD/27P,125
- Part No.:
- LD6836TD/27P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/27P,125.pdf
- Description:
- IC REG LINEAR 2.7V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:26,612
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Product details
Overview
LD6836TD/27P,125 from NXP Semiconductors is a 2.7 V fixed-output, 300 mA ultra-low-dropout linear regulator in SOT753 package with auto-discharge (pull-down) function, 100 mV typical dropout at full load, 30 µV RMS output noise, and 55 dB PSRR at 1 kHz - designed for power-sensitive portable applications including mobile phone handsets and digital still cameras.
For engineers reviewing the LD6836TD/27P,125 datasheet, LD6836TD/27P,125 pinout, LD6836TD/27P,125 application, or LD6836TD/27P,125 equivalent, key selection criteria include its pull-down output behavior during disable, low-noise regulation under 300 mA load, thermal shutdown at 160 °C, and compatibility with 0.7–1.0 µF X7R output capacitors.
Technical Context
The LD6836TD/27P,125 implements a PMOS pass transistor architecture enabling ultra-low dropout (100 mV typ. at 300 mA), active-high enable control with 1.1 V minimum VIH, and integrated auto-discharge via an internal 100 Ω pull-down switch on the OUT pin. Its feedback loop is internally compensated for stability with 0.7–1.0 µF ceramic output capacitance.
It features over-temperature shutdown with 20 K hysteresis, current limiting (600 mA short-circuit protection), and ESD robustness up to ±10 kV HBM. Input voltage range is 2.3 V to 5.5 V, supporting direct Li-ion/Li-poly battery input without pre-regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.7 V ±3 % over −40 °C to +85 °C ambient; enables direct supply to 2.7 V I/O domains of baseband processors. |
| Dropout voltage | 100 mV typical at 300 mA; allows operation down to VIN = 2.8 V while maintaining regulation - critical for single-cell battery systems. |
| Quiescent current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes battery drain in standby mode of always-on sensors. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output noise | 30 µV RMS (10 Hz–100 kHz); ensures clean bias for RF front-end LNA and high-resolution ADC reference circuits. |
| Enable threshold | VIH ≥ 1.1 V, VIL ≤ 0.4 V; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Thermal resistance | Rth(j-a) = 125 K/W (SOT753); requires minimal copper pour for thermal management in compact PCB layouts. |
Pinout & Package
SOT753 plastic surface-mounted package (5-lead, SC-74A compatible), 3.0 mm × 1.7 mm × 1.1 mm body size, lead pitch 0.95 mm, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input voltage | Accepts 2.3–5.5 V unregulated input; requires local 1 µF ceramic decoupling capacitor. |
| 2 GND | Supply ground | Primary return path for load and quiescent current; must connect directly to low-impedance ground plane. |
| 3 EN | Enable input (active HIGH) | Controls regulator state; drives OUT to regulated voltage when ≥1.1 V, disables with auto-discharge when ≤0.4 V. |
| 4 n.c. | No connection | Internally unconnected; no external trace or pad required - simplifies layout and avoids floating node risks. |
| 5 OUT | Regulated output voltage | Delivers stable 2.7 V; includes integrated 100 Ω pull-down transistor to discharge external capacitance during disable. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Internal 100 Ω pull-down on OUT pin actively discharges external capacitors during disable - eliminates residual voltage that could delay system reset or cause latch-up. |
| Low-noise regulation | 30 µV RMS output noise (10 Hz–100 kHz) enables use in analog signal chains without additional filtering. |
| High PSRR | 55 dB rejection at 1 kHz reduces sensitivity to ripple from upstream switching regulators - improves power integrity in mixed-signal SoC designs. |
| Thermal protection | 160 °C junction shutdown with 20 K hysteresis prevents permanent damage during sustained overload or poor heatsinking. |
| Input voltage range | 2.3 V to 5.5 V supports direct connection to single-cell Li-ion (2.7–4.2 V), LiFePO₄ (2.0–3.6 V), or 3.3 V/5 V system rails. |
Applications
| Smartphone Baseband Power | Digital Still Camera Sensor Bias |
|---|---|
Use Scenario: Powering 2.7 V I/O supply rail of application processor in slim smartphone form factor with tight thermal constraints. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.7 V to processor I/O banks during active and sleep states. Use Value: Auto-discharge ensures rapid rail collapse during deep-sleep entry, preventing leakage through inactive interfaces and meeting <1 µA system standby targets. | Use Scenario: Supplying image sensor analog core requiring ultra-low-noise bias in compact DSC modules. IC Role / Device Role / Timing Role: Low-noise post-regulator stepping down from 3.3 V DC-DC output to precise 2.7 V sensor analog supply. Use Value: 30 µV RMS noise and 55 dB PSRR maintain SNR > 70 dB in 12-bit CMOS image sensors - avoiding visible banding artifacts. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Providing 2.7 V bias to stereo audio codec DAC/ADC section in battery-powered media player. IC Role / Device Role / Timing Role: Low-quiescent, low-noise LDO isolating sensitive analog audio paths from noisy digital subsystems. Use Value: 0.1 µA shutdown current extends battery life during playback pause; 100 mV dropout preserves runtime as battery discharges to 2.8 V. | Use Scenario: Powering GPS RF front-end LNA and mixer stages in handheld navigation device with aggressive size constraints. IC Role / Device Role / Timing Role: Compact SOT753 LDO delivering stable 2.7 V with fast 150 µs startup to meet GNSS cold-start timing requirements. Use Value: 150 µs turn-on time enables immediate LNA activation upon GPS wake signal - reducing time-to-first-fix by ~120 ms vs. slower alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6836TD/27H,125 | Same package and output voltage but high-ohmic (3-state) output during disable - no auto-discharge. | Used where output must float during shutdown (e.g., shared bus lines), not where rapid discharge is required. | Select LD6836TD/27H,125 only if system design explicitly requires tri-state behavior instead of active pull-down. |
| Torex XC6219B272MR-G | 2.7 V, 300 mA LDO in SOT-25; 150 mV dropout (higher), 45 dB PSRR (lower), no integrated pull-down. | Lacks auto-discharge; requires external circuitry for rail discharge - increases BOM count and board area. | Choose XC6219B272MR-G only if footprint compatibility with legacy SOT-25 designs is mandatory and auto-discharge is handled externally. |
Compared with LD6836TD/27H,125, the LD6836TD/27P,125 provides essential active discharge for fast system reset; versus XC6219B272MR-G, it delivers superior noise performance and integrated functionality - reducing design complexity and improving reliability in space-constrained portable systems.
Availability
LD6836TD/27P,125 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codecs, and personal navigation device GPS front-ends requiring stable component supply with guaranteed long-term availability.
Supply support for LD6836TD/27P,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 LD6836 series was developed specifically for ultra-compact, low-noise, and low-power portable applications - targeting battery-powered devices where dropout voltage, shutdown current, and EMI-sensitive analog performance are critical.
FAQ
What is the nominal output voltage of the LD6836TD/27P,125?
The LD6836TD/27P,125 delivers a fixed nominal output voltage of 2.7 V, with initial accuracy of ±0.5 % at +25 °C and total variation of ±3 % across −40 °C to +85 °C ambient temperature and full 1–300 mA load range. This value is laser-marked as "9PP" on the SOT753 package body per Table 18.
Does the LD6836TD/27P,125 include auto-discharge functionality?
Yes, the LD6836TD/27P,125 integrates an internal pull-down transistor on the OUT pin that activates during disable (EN ≤ 0.4 V), providing a low-ohmic path with typical resistance of 100 Ω to rapidly discharge external output capacitance - a key differentiator from the "H" variant LD6836TD/27H,125.
What is the recommended output capacitor for stable operation of the LD6836TD/27P,125?
The LD6836TD/27P,125 requires an external ceramic output capacitor of 0.7–1.0 µF with X7R dielectric and ESR between 5–500 mΩ. A 1.0 µF X7R capacitor is recommended for optimal transient response and PSRR performance across temperature, as specified in Table 13 and Figure 20.
What is the thermal shutdown behavior of the LD6836TD/27P,125?
The LD6836TD/27P,125 triggers thermal shutdown at 160 °C junction temperature and remains off until junction temperature falls by 20 K (to ~140 °C) due to built-in hysteresis. This protects the device during sustained overload or inadequate PCB copper area, and recovery is automatic once safe temperature is restored.
Can the LD6836TD/27P,125 operate from a single-cell Li-ion battery?
Yes, the LD6836TD/27P,125 supports input voltages from 2.3 V to 5.5 V, making it fully compatible with single-cell Li-ion batteries (nominal 3.7 V, discharge range ~2.7–4.2 V). With only 100 mV typical dropout at 300 mA, it maintains regulation down to VIN = 2.8 V - covering >95 % of usable battery capacity.
LD6836TD/27P,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):
- 2.7V
- 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/27P,125 FAQ
1.How can I place an order for LD6836TD/27P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/27P,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/27P,125 reliable?
The price and inventory of LD6836TD/27P,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/27P,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/27P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/27P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/27P,125?
LD6836TD/27P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/27P,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/27P,125?
For technical support, including LD6836TD/27P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/27P,125 requirements.
6.How does Aetrix verify that LD6836TD/27P,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/27P,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/27P,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/27P,125?
All LD6836TD/27P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/27P,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/27P,125 part is unused and in its original packaging.
Return procedure for LD6836TD/27P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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