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NXP Semiconductors LD6836TD/18H,125
- Part No.:
- LD6836TD/18H,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/18H,125.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,284
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Product details
Overview
LD6836TD/18H,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 active-HIGH enable with 150 µs startup time. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable electronics.
For engineers reviewing the LD6836TD/18H,125 datasheet, LD6836TD/18H,125 pinout, LD6836TD/18H,125 application, or LD6836TD/18H,125 equivalent, this page provides verified electrical specs, thermal behavior, disable-mode output impedance, PSRR performance, and real-world design guidance for mobile interface power rails.
Technical Context
The LD6836TD/18H,125 implements a PMOS pass transistor architecture enabling ultra-low dropout (100 mV typ. at 300 mA) and high PSRR (−55 dB at 1 kHz). Its internal reference and error amplifier maintain ±0.5% output accuracy at 25 °C with ±3% variation over −40 °C to +85 °C ambient.
It features integrated over-temperature shutdown (160 °C trigger, 20 K hysteresis), current limiting (600 mA short-circuit), and ESD protection (±10 kV HBM). In disabled state, the output enters high-ohmic (3-state) mode-no pull-down-making it suitable for systems requiring voltage rail isolation during standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±0.5% at 25 °C; ±3% over full temperature range - ensures stable core logic supply for low-voltage microcontrollers and sensors. |
| Dropout Voltage | 100 mV typical at 300 mA - enables operation down to VIN = 1.9 V, maximizing battery runtime in single-cell Li-ion or Li-poly 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) - critical for powering ADC references, RF synthesizers, and audio codecs without added filtering. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V) - minimizes leakage current in always-on subsystems like RTC or wake-up controllers. |
| Enable Threshold | VIL ≤ 0.4 V, VIH ≥ 1.1 V - compatible with 1.8 V and 3.3 V GPIOs; no level-shifting required for host MCU control. |
| Thermal Resistance | Rth(j-a) = 125 K/W - requires minimal PCB copper area for thermal management in compact handheld layouts. |
Pinout & Package
SOT753 plastic surface-mounted package (5-lead, 1.6 mm × 2.9 mm × 1.1 mm body height), compatible with JEDEC SC-74A footprint and reflow soldering per J-STD-020C MSL1.
| 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 near pin for stability and transient response. |
| 2 (GND) | Supply ground | Primary return path; requires low-impedance connection to system ground plane to minimize noise coupling and thermal resistance. |
| 3 (EN) | Enable input (active HIGH) | Drives regulator ON when ≥1.1 V; pulls to GND or leaves floating to disable; no external pull-down needed. |
| 4 (n.c.) | Not connected | Internally unconnected; must remain unpopulated and unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 5 (OUT) | Regulator output voltage | Delivers regulated 1.8 V; high-ohmic (3-state) when disabled - isolates downstream circuitry from backfeed or leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 100 mV typical at 300 mA enables use with weak or aging batteries while maintaining regulation. |
| Low-noise output | 30 µV RMS noise supports precision analog signal chains without additional LDO post-regulation. |
| High PSRR | −55 dB at 1 kHz rejects ripple from switchers, reducing need for bulky input LC filters. |
| Fast startup | 150 µs to reach 95% of 1.8 V allows rapid power sequencing in wake-from-sleep applications. |
| Robust protection | Integrated thermal shutdown (160 °C), current limit (600 mA), and ±10 kV HBM ESD ensure field reliability in handheld environments. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers baseband processor I/O banks and RF transceiver analog sections in dual-SIM smartphones where input rail shares noisy DC-DC outputs. IC Role / Device Role / Timing Role: Primary low-noise 1.8 V LDO delivering clean power to sensitive RF front-end and high-speed serial interfaces (e.g., MIPI D-PHY). Use Value: 30 µV RMS noise and −55 dB PSRR prevent bit errors and phase noise degradation in LTE/Wi-Fi coexistence scenarios. | Use Scenario: Supplies image sensor analog bias rails and ADC reference in compact digital still cameras with tight thermal budgets. IC Role / Device Role / Timing Role: Fixed 1.8 V LDO providing stable, low-noise supply for CMOS image sensor pixel arrays and column amplifiers. Use Value: 100 mV dropout extends usable battery life by >12 minutes per charge cycle compared to standard 200 mV LDOs under 300 mA load. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Powers stereo audio codec DACs and headphone amplifiers in battery-powered media players requiring low THD+N. IC Role / Device Role / Timing Role: Low-noise 1.8 V supply for audio signal path; enabled synchronously with playback start via MCU GPIO. Use Value: 30 µV RMS noise directly translates to <−105 dBu residual noise floor, eliminating audible hiss without extra RC filtering. | Use Scenario: Supplies GPS/GNSS RF front-end LNA and mixer bias in handheld navigation devices operating from single-cell Li-ion. IC Role / Device Role / Timing Role: High-PSRR 1.8 V LDO isolating GNSS receiver from noisy system power during data logging and display updates. Use Value: −55 dB PSRR at 1 kHz suppresses 20 mVpp switching ripple from buck converter, preventing 2 dB SNR degradation in C/A-code tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-1802E/MB | 1.8 V, 250 mA, 170 mV dropout (typ.), 65 µV RMS noise, SOT23-5 | Lower current rating and higher dropout reduce battery efficiency in 300 mA continuous loads. | Select when lower cost and legacy qualification outweigh 50 mA current headroom and 70 mV higher dropout penalty. |
| TLS850F2BTV50 | 1.8 V, 500 mA, 200 mV dropout (typ.), automotive AEC-Q100 Grade 1, PG-SCT595-5 | Automotive-qualified but larger footprint and higher quiescent current (2.5 µA vs. 0.1 µA shutdown); not optimized for portable battery life. | Select only for automotive infotainment modules requiring AEC-Q100 compliance and higher current margin. |
Compared with MCP1703T-1802E/MB and TLS850F2BTV50, the LD6836TD/18H,125 offers superior noise performance (30 µV vs. 65 µV), lower shutdown current (0.1 µA vs. 1.5 µA), and tighter output tolerance (±0.5% vs. ±2%), making it optimal for consumer portable designs prioritizing signal integrity and battery longevity.
Availability
LD6836TD/18H,125 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codec supply, and personal navigation device GPS front-end applications requiring stable component supply across production ramps and long-life programs.
Supply support for LD6836TD/18H,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 LD6836 series belongs to NXP's ultra-low-noise, low-dropout regulator product line, designed specifically for power-sensitive portable electronics where miniaturization, battery efficiency, and analog signal integrity are critical.
FAQ
What is the maximum input voltage rating for LD6836TD/18H,125?
The LD6836TD/18H,125 has an absolute maximum input voltage of +6.0 V for transient conditions up to 4 ms, with recommended operating range of 2.3 V to 5.5 V. Exceeding 6.0 V risks permanent damage to the internal PMOS pass element and bandgap reference circuitry. Always include input overvoltage clamping if interfacing with unregulated sources such as USB-C PD or hot-swap circuits.
Does LD6836TD/18H,125 require an external output capacitor, and what value is recommended?
Yes, LD6836TD/18H,125 requires an external output capacitor for stability. The datasheet specifies a minimum of 0.7 µF (±30% tolerance) with ESR between 5 mΩ and 500 mΩ; 1.0 µF X7R ceramic is the recommended value. Using less than 0.7 µF may cause oscillation or poor load transient response, especially under 300 mA step changes.
What happens to the output pin of LD6836TD/18H,125 when the EN pin is driven LOW?
When EN is driven LOW (≤0.4 V), LD6836TD/18H,125 enters shutdown mode and the OUT pin transitions to a high-ohmic (3-state) condition - effectively disconnecting the output from the internal pass transistor. This prevents backfeeding and allows safe stacking of multiple LDO outputs or isolation of powered-down subsystems.
Is LD6836TD/18H,125 RoHS-compliant and halogen-free?
Yes, LD6836TD/18H,125 is Pb-free, RoHS-compliant, and fully halogen- and antimony-free (NXP "dark green" compliant). It meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity requirements, supporting lead-free reflow processes per J-STD-020C.
Can LD6836TD/18H,125 be used in automotive applications?
No, LD6836TD/18H,125 is qualified for consumer applications per NX1-00023 and operates over −40 °C to +85 °C ambient. It lacks AEC-Q100 qualification, extended temperature range (−40 °C to +125 °C), and automotive-specific reliability testing. For automotive use, consider NXP's TLS850F2BTV50 or similar AEC-Q100-qualified LDOs instead of LD6836TD/18H,125.
LD6836TD/18H,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/18H,125 FAQ
1.How can I place an order for LD6836TD/18H,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/18H,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/18H,125 reliable?
The price and inventory of LD6836TD/18H,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/18H,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/18H,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/18H,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/18H,125?
LD6836TD/18H,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/18H,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/18H,125?
For technical support, including LD6836TD/18H,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/18H,125 requirements.
6.How does Aetrix verify that LD6836TD/18H,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/18H,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/18H,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/18H,125?
All LD6836TD/18H,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/18H,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/18H,125 part is unused and in its original packaging.
Return procedure for LD6836TD/18H,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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