My Inquiry
My Account
NXP Semiconductors LD6836TD/29P,125
- Part No.:
- LD6836TD/29P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6836TD/29P,125.pdf
- Description:
- IC REG LINEAR 2.9V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LD6836TD/29P,125 from NXP Semiconductors is a 2.9 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 µVRMS output noise (10 Hz–100 kHz), and integrated auto-discharge pull-down transistor (100 Ω) for rapid output discharge during shutdown - deployed in smartphone power rails and portable media player core supplies.
For engineers reviewing the LD6836TD/29P,125 datasheet, LD6836TD/29P,125 pinout, LD6836TD/29P,125 application, or LD6836TD/29P,125 equivalent, key selection criteria include verified 2.9 V output accuracy (±2% over −40 °C to +85 °C), 55 dB PSRR at 1 kHz, enable threshold compatibility with 1.1 V logic, and thermal shutdown at 160 °C with 20 K hysteresis.
Technical Context
The LD6836TD/29P,125 implements a PMOS pass transistor architecture enabling ultra-low dropout operation down to 100 mV at 300 mA, with internal voltage reference and error amplifier stabilized by external 0.7–1.0 µF X7R ceramic output capacitance. Its active-HIGH enable input (VIH ≥ 1.1 V) directly interfaces with standard GPIOs without level-shifting.
Unlike high-ohmic disable variants (e.g., LD6836TD/29H), this P-suffix device integrates a dedicated pull-down NMOS switch connecting OUT to GND during disable, achieving 300 µs shutdown time and eliminating need for external discharge resistors in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.9 V ±2% over −40 °C to +85 °C - ensures stable core supply for 2.8–3.0 V logic domains without external feedback. |
| Dropout voltage | 100 mV typical at 300 mA - enables regulation from 3.0 V input when battery voltage drops to 3.0 V, extending usable battery life. |
| 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) - meets low-noise requirements for RF biasing and precision analog circuitry. |
| Quiescent current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V) - minimizes leakage current in always-on system standby modes. |
| Enable threshold | VIL ≤ 0.4 V / VIH ≥ 1.1 V - compatible with 1.8 V and 3.3 V I/O standards without external logic translation. |
| 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 (3.0 mm × 1.7 mm × 1.3 mm), 5-lead, RoHS-compliant, lead-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.3–5.5 V; requires 0.7–1.0 µF X7R ceramic input capacitor for stability. |
| 2 (GND) | Ground reference | Common return path for input, output, and enable; must connect to low-impedance ground plane. |
| 3 (EN) | Enable control input | Active-HIGH logic; drives internal pass transistor and pull-down switch; VIH ≥ 1.1 V required for turn-on. |
| 4 (n.c.) | No connection | Internally unconnected; must remain floating - no external tie or routing permitted. |
| 5 (OUT) | Regulated output | Delivers 2.9 V @ up to 300 mA; integrates 100 Ω pull-down switch activated during EN = LOW. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω NMOS pull-down on OUT pin reduces residual voltage to 5% of nominal within 300 µs after EN deactivation - eliminates need for external discharge resistor in battery-powered systems. |
| Low-noise regulation | 30 µVRMS output noise over 10 Hz–100 kHz bandwidth enables clean power for RF transceivers and ADC reference supplies. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz allows direct use after noisy buck converter stages without additional filtering. |
| Robust protection suite | Includes over-temperature shutdown (160 °C, 20 K hysteresis), output current limiting (600 mA short-circuit), and 10 kV HBM ESD rating on all pins. |
| Miniaturized footprint | SOT753 package (3.0 × 1.7 mm) matches SOT23-5 land pattern - enables drop-in replacement in space-constrained mobile designs. |
Applications
| Smartphone Application Processor Core Rail | Digital Still Camera Image Sensor Bias |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 2.9 V supply with fast transient response during burst-mode operation. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable 2.9 V from switched DC-DC output; provides auto-discharge during processor sleep states. Use Value: Enables 300 µs output collapse during deep-sleep entry, reducing system standby current by eliminating floating rail charge retention. | Use Scenario: Supplies analog front-end and column ADC bias voltage in compact DSC modules where EMI sensitivity limits switching regulator use. IC Role / Device Role / Timing Role: Low-noise LDO generating clean 2.9 V reference for image sensor analog chain; rejects ripple from shared main power rail. Use Value: 30 µVRMS noise floor prevents fixed-pattern noise in captured images; 55 dB PSRR maintains SNR when co-located with Wi-Fi/BT radios. |
| Portable Media Player Audio Codec Supply | Personal Navigation Device GPS Baseband IC Supply |
Use Scenario: Provides 2.9 V bias to stereo audio DAC and headphone amplifier in battery-operated MP3 players. IC Role / Device Role / Timing Role: Low-quiescent-current LDO with shutdown control synchronized to playback state machine. Use Value: 0.1 µA shutdown current extends battery runtime during pause mode; 100 mV dropout preserves regulation as Li-ion voltage declines to 3.0 V. | Use Scenario: Supplies 2.9 V to GPS baseband processor in handheld navigation units operating under variable temperature and vibration conditions. IC Role / Device Role / Timing Role: Thermally robust LDO with 125 K/W Rth(j-a) and 160 °C thermal shutdown protecting against enclosure heat buildup. Use Value: Maintains regulation across −40 °C to +85 °C ambient range; over-temperature hysteresis prevents thermal cycling during sustained GPS acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2902E/MB | 2.9 V fixed output, 250 mA max, 350 mV dropout at full load, no integrated pull-down | Lacks auto-discharge; requires external resistor for output discharge; higher dropout limits low-battery operation | Select when board space permits external discharge circuit and input voltage remains >3.25 V. |
| Torex XC6219B292MR-G | 2.9 V fixed output, 300 mA, 150 mV dropout, 45 dB PSRR at 1 kHz, no pull-down | Higher dropout and lower PSRR reduce noise immunity; no integrated discharge switch increases BOM count | Choose only if existing design uses Torex footprint and thermal margin exceeds 15 K above 125 °C junction limit. |
Compared with MCP1703T-2902E/MB and XC6219B292MR-G, LD6836TD/29P,125 delivers superior low-voltage operation (100 mV dropout), integrated discharge functionality, and higher PSRR - making it optimal for battery-constrained, noise-sensitive portable systems requiring zero external discharge components.
Availability
LD6836TD/29P,125 is available at Aetrix Electronics and suitable for smartphone power management, portable media player audio subsystems, and digital still camera sensor biasing requiring stable component supply with guaranteed long-term continuity.
Supply support for LD6836TD/29P,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 designed specifically for ultra-compact, low-noise power regulation in battery-powered portable devices - emphasizing miniaturization (WLCSP and SOT753), sub-100 mV dropout, and integrated functional safety features like thermal shutdown and current limiting.
FAQ
What is the exact output voltage tolerance of the LD6836TD/29P,125 across temperature and load?
The LD6836TD/29P,125 delivers 2.9 V output with ±2% tolerance over −40 °C to +85 °C ambient temperature and 1 mA to 300 mA load current. At +25 °C and 1 mA load, variation is tighter at ±0.5%. This specification is confirmed in Table 12 of the official NXP LD6836_SER datasheet Rev. 2.
Does the LD6836TD/29P,125 require an input capacitor, and what value is recommended?
Yes, the LD6836TD/29P,125 requires an external input capacitor for stability. Per Section 10.1 and Table 13 of the datasheet, a 0.7–1.0 µF X7R ceramic capacitor with ESR between 5–500 mΩ is recommended. The minimum value is 0.7 µF (±30% tolerance), and placement should be adjacent to the IN and GND pins.
How does the auto-discharge function of the LD6836TD/29P,125 operate during shutdown?
When the EN pin is driven LOW, the LD6836TD/29P,125 activates an internal 100 Ω NMOS pull-down transistor between OUT and GND. This discharges the output capacitor to 5% of nominal voltage (0.145 V) within 300 µs, as specified in Table 12 under tsd(reg). No external resistor is needed.
What is the maximum allowable input voltage for the LD6836TD/29P,125, and is it safe for 5 V rail use?
The LD6836TD/29P,125 supports input voltages from 2.3 V to 5.5 V continuously, with absolute maximum rating of +6.0 V for 4 ms transients (Table 9). Using it on a nominal 5 V rail is fully compliant and common in USB-powered portable designs.
Can the LD6836TD/29P,125 be used with ceramic output capacitors smaller than 1 µF?
Yes - the LD6836TD/29P,125 is stable with output capacitance as low as 0.7 µF (Table 13), provided it is X7R dielectric and meets ±30% tolerance over temperature. Using 0.7 µF enables smaller PCB area but may slightly increase startup time and reduce PSRR at higher frequencies.
LD6836TD/29P,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):
- 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/29P,125 FAQ
1.How can I place an order for LD6836TD/29P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836TD/29P,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/29P,125 reliable?
The price and inventory of LD6836TD/29P,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/29P,125 is usually 5 days.
3.What payment methods are accepted for LD6836TD/29P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836TD/29P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836TD/29P,125?
LD6836TD/29P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836TD/29P,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/29P,125?
For technical support, including LD6836TD/29P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836TD/29P,125 requirements.
6.How does Aetrix verify that LD6836TD/29P,125 is sourced from the original manufacturer or authorized distributors?
All LD6836TD/29P,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/29P,125 meets industry standards.
7.What is the process for return or replacement of LD6836TD/29P,125?
All LD6836TD/29P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836TD/29P,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/29P,125 part is unused and in its original packaging.
Return procedure for LD6836TD/29P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LD6836TD/29P,125 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
