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NXP Semiconductors LD6836TD/33P,125
- Part No.:
- LD6836TD/33P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/33P,125.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,784
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Product details
Overview
LD6836TD/33P,125 from NXP Semiconductors is a 300 mA ultra-low-dropout linear regulator in SOT753 package with fixed 3.3 V output, 100 mV typical dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and integrated auto-discharge pull-down transistor for rapid output discharge during disable. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable electronics.
For engineers reviewing the LD6836TD/33P,125 datasheet, LD6836TD/33P,125 pinout, LD6836TD/33P,125 application, or LD6836TD/33P,125 equivalent, key selection criteria include its 2.3–5.5 V input range, 150 µs startup time, 55 dB PSRR at 1 kHz, ±0.5% output accuracy at +25 °C, and active-HIGH enable with 1.1 V minimum VIH - all critical for battery-powered mobile interface rails.
Technical Context
The LD6836TD/33P,125 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR. Its internal reference generator and error amplifier maintain tight regulation across −40 °C to +85 °C ambient, while thermal shutdown (160 °C) and current limiting (600 mA short-circuit) ensure robust operation under fault conditions.
Unlike high-ohmic variants (e.g., LD6836TD/33H), this P-suffix device integrates a dedicated 100 Ω pull-down transistor on the OUT pin, enabling fast discharge of downstream capacitance upon EN deactivation - essential for sequencing and power-domain isolation in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±2% over −40 °C to +85 °C; ensures compatibility with 3.3 V I/O standards without external feedback. |
| Dropout voltage | 100 mV typical at 300 mA; enables operation with VIN as low as 3.4 V while sustaining full rated output. |
| Quiescent current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes battery drain in standby mode. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output noise | 30 µVRMS (10 Hz–100 kHz); supports low-noise analog sensors and RF front-end biasing. |
| Enable threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V and 3.3 V logic-level microcontrollers. |
| Startup time | 150 µs to 95% of 3.3 V; meets fast wake-up timing requirements in portable devices. |
Pinout & Package
SOT753 plastic surface-mounted package (5-lead, SC-74A compatible), dimensions 3.0 mm × 1.7 mm × 1.1 mm (L × W × H), RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input voltage | Accepts 2.3–5.5 V supply; requires ≥0.7 µF ceramic input capacitor for stability. |
| 2 - GND | Supply ground | Primary return path for input and output currents; must connect to low-impedance ground plane. |
| 3 - EN | Enable input (active HIGH) | Drives internal pass transistor; logic HIGH ≥1.1 V enables regulation, LOW ≤0.4 V disables with auto-discharge. |
| 4 - n.c. | No connection | Internally unconnected; must remain floating or tied to GND per layout best practices. |
| 5 - OUT | Regulator output voltage | Delivers regulated 3.3 V; includes integrated 100 Ω pull-down for rapid discharge when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output capacitance in ≤300 µs upon disable - eliminates hold-up voltage in sequenced power domains. |
| Low-noise regulation | 30 µVRMS output noise enables clean power for ADC references, PLLs, and RF ICs without additional filtering. |
| High PSRR | 55 dB rejection at 1 kHz allows co-location with noisy DC-DC converters, reducing board-level filtering complexity. |
| Thermal protection | 160 °C junction shutdown with 20 K hysteresis prevents permanent damage during sustained overload or poor heatsinking. |
| ESD robustness | ±10 kV HBM ESD rating protects against handling damage during assembly and field operation. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplying 3.3 V rail to baseband processor I/O interfaces in LTE smartphones with aggressive power cycling. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable voltage during rapid EN-controlled sleep/wake transitions. Use Value: 150 µs startup and auto-discharge ensure sub-millisecond domain activation/deactivation, meeting 3GPP power-state timing budgets. |
Use Scenario: Providing clean 3.3 V bias to CMOS image sensor analog front-end in compact digital still cameras. IC Role / Device Role / Timing Role: Low-noise LDO isolating sensor analog supply from noisy digital subsystems. Use Value: 30 µVRMS noise and 55 dB PSRR prevent image artifacts caused by switching ripple coupling into pixel readout circuits. |
| Portable Media Player Audio Codec | Personal Navigation Device GPS Front-End |
Use Scenario: Powering stereo audio codec DAC/ADC circuitry in battery-operated media players requiring low THD+N. IC Role / Device Role / Timing Role: Dedicated low-noise supply rail decoupled from main system rail. Use Value: Ultra-low dropout preserves battery runtime down to 3.4 V input while maintaining 3.3 V output accuracy within ±0.5%. |
Use Scenario: Delivering regulated 3.3 V to GPS RF receiver LNA and mixer stages in handheld navigation units. IC Role / Device Role / Timing Role: Noise-suppressing power source placed adjacent to RF section to minimize conducted emissions. Use Value: High PSRR and low noise prevent reciprocal mixing and phase noise degradation in GPS signal acquisition and tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6836TD/33H | Same package and output voltage but high-ohmic (3-state) output during disable; no auto-discharge. | Lacks rapid output discharge; unsuitable where downstream capacitance must be actively pulled low during power-down. | Select LD6836TD/33H only if output floating during disable is acceptable and sequencing control is handled externally. |
| Torex XC6210B332MR-G | 300 mA, 3.3 V fixed, SOT-25 package; 120 mV dropout, 40 µVRMS noise, no integrated pull-down. | Higher dropout and noise; requires external discharge circuitry for equivalent auto-discharge behavior. | Choose XC6210B332MR-G only if footprint compatibility with SOT-25 is required and external MOSFET discharge is acceptable. |
Compared with LD6836TD/33H and XC6210B332MR-G, the LD6836TD/33P,125 uniquely combines 3.3 V regulation, SOT753 packaging, and monolithic auto-discharge - eliminating discrete components and PCB area otherwise needed for controlled power-down sequencing.
Availability
LD6836TD/33P,125 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codec, personal navigation device GPS front-end, and other portable electronics requiring stable component supply with low-noise, fast-response regulation.
Supply support for LD6836TD/33P,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 was designed specifically for space-constrained portable electronics requiring ultra-low-noise, low-dropout regulation with integrated power sequencing features - targeting mobile handsets, digital cameras, and navigation devices.
FAQ
What is the maximum input voltage rating for LD6836TD/33P,125?
The LD6836TD/33P,125 has an absolute maximum input voltage of +6.0 V for transient conditions up to 4 ms. For continuous operation, the recommended input range is 2.3 V to 5.5 V. Exceeding 6.0 V risks permanent damage to the internal pass transistor and protection circuitry. Always verify input rail transients in the target application using oscilloscope capture before final design sign-off.
Does LD6836TD/33P,125 require an external output capacitor, and what value is recommended?
Yes, LD6836TD/33P,125 requires an external output capacitor for stability. The datasheet specifies a minimum of 0.7 µF with ±30% tolerance and ESR between 5 mΩ and 500 mΩ. A 1.0 µF X7R ceramic capacitor is recommended for full temperature range (−40 °C to +125 °C) operation. Using less than 0.7 µF may cause oscillation or poor load transient response.
How does the auto-discharge function of LD6836TD/33P,125 operate during disable?
When the EN pin is driven LOW (≤0.4 V), the LD6836TD/33P,125 activates an internal 100 Ω pull-down transistor between OUT and GND, discharging external output capacitance to 5% of nominal voltage in ≤300 µs. This eliminates residual voltage that could interfere with downstream logic states or violate reset timing in multi-rail systems.
What is the thermal resistance (Rth(j-a)) of LD6836TD/33P,125 in typical PCB layout?
The typical junction-to-ambient thermal resistance of LD6836TD/33P,125 is 125 K/W under standard test conditions (2-layer PCB, 25 °C ambient). Actual performance depends on copper pour area, via count to internal ground/power planes, and airflow. For 300 mA continuous load, junction temperature rise is ~37.5 °C above ambient - well within the +125 °C max rating if board layout follows NXP's thermal guidelines.
Is LD6836TD/33P,125 compatible with lead-free reflow soldering processes?
Yes, LD6836TD/33P,125 is qualified for lead-free reflow soldering per J-STD-020C. Its package thickness (1.1 mm) and volume place it in the "< 2.5 mm thickness, < 350 mm³ volume" category, requiring a peak reflow temperature of 235 °C. Ensure the profile includes adequate preheat, controlled ramp rates, and cooling to avoid delamination or solder joint voiding.
LD6836TD/33P,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):
- 3.3V
- 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/33P,125 FAQ
1.How can I place an order for LD6836TD/33P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/33P,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/33P,125 reliable?
The price and inventory of LD6836TD/33P,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/33P,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/33P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/33P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/33P,125?
LD6836TD/33P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/33P,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/33P,125?
For technical support, including LD6836TD/33P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/33P,125 requirements.
6.How does Aetrix verify that LD6836TD/33P,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/33P,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/33P,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/33P,125?
All LD6836TD/33P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/33P,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/33P,125 part is unused and in its original packaging.
Return procedure for LD6836TD/33P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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