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NXP Semiconductors LD6815TD/12P,125
- Part No.:
- LD6815TD/12P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6815TD/12P,125.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:33,000
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Product details
Overview
LD6815TD/12P,125 from NXP Semiconductors is a fixed 1.2 V, 150 mA low-dropout linear regulator with ultra-high PSRR (75 dB at 1 kHz), 250 mV dropout at full load, and auto-discharge functionality via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and delivers ultra-low noise (40 µV RMS, 10 Hz–100 kHz) for powering sensitive analog and RF circuitry in portable consumer devices.
For engineers reviewing the LD6815TD/12P,125 datasheet, LD6815TD/12P,125 pinout, LD6815TD/12P,125 application, or LD6815TD/12P,125 equivalent, key selection criteria include its 1.2 V fixed output, SOT753 package compatibility, 0.1 µA shutdown quiescent current, 150 µs startup time, and auto-discharge capability-critical for battery-powered systems requiring rapid output discharge during disable.
Technical Context
The LD6815TD/12P,125 uses a PMOS pass transistor architecture enabling low dropout and high PSRR without external compensation. Its enable input (EN) is active-HIGH with TTL-compatible thresholds (VIH ≥ 1.1 V, VIL ≤ 0.4 V), and it integrates overcurrent protection and thermal shutdown.
Unlike high-ohmic variants (e.g., LD6815TD/12H), the /12P suffix denotes an internal 100 Ω pull-down transistor that actively discharges the output capacitor during disable mode, achieving 300 µs shutdown time (tsd(reg))-a design-critical feature for power sequencing in multi-rail mobile SoC subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.2 V ±2% (Tamb = +25 °C); ±3% over −40 °C to +85 °C - ensures stable core voltage for low-power microcontrollers and memory interfaces. |
| Max output current | 150 mA continuous - supports single-core processors, camera modules, and audio codecs in compact handheld devices. |
| Dropout voltage | 250 mV at 150 mA - enables operation down to VIN = 1.45 V, maximizing battery runtime in Li-ion/Li-poly systems. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input, preserving signal integrity in RF front-ends. |
| RMS output noise | 40 µV (10 Hz–100 kHz) - minimizes jitter in clock generation circuits and improves SNR in ADC/DAC signal chains. |
| Quiescent current | 0.1 µA in shutdown (VEN ≤ 0.4 V) - extends shelf life and standby time in always-on sensor nodes and IoT endpoints. |
| Startup time | 150 µs (VIN = 5.5 V, CL = 1 µF) - meets fast wake-up requirements for application processors entering and exiting low-power states. |
| Pull-down resistance | 100 Ω - ensures rapid discharge of 1 µF output capacitance to <5% VO(nom) within 300 µs, preventing back-powering of upstream circuitry. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mount package: 2.9 × 1.5 × 1.0 mm body, 5-lead, lead pitch 0.95 mm. RoHS-compliant, monolithic silicon construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.3 V–5.5 V supply; requires 1 µF ceramic decoupling capacitor close to pin for stability and transient response. |
| 2 GND | Supply ground | Common reference for input, output, and enable; must connect directly to low-impedance PCB ground plane to minimize noise coupling. |
| 3 EN | Enable control | Active-HIGH logic input; drives internal pass transistor and pull-down switch; VIH ≥ 1.1 V ensures reliable turn-on with standard GPIOs. |
| 4 n.c. | No connection | Internally unconnected; must remain floating-no external tie or routing to avoid parasitic coupling or ESD path disruption. |
| 5 OUT | Regulated output | Delivers 1.2 V ±3%; connects to load and 1 µF output capacitor; pull-down transistor discharges this node when EN = LOW. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor actively sinks output current during disable, eliminating need for external discharge circuitry and reducing BOM count. |
| Ultra-low shutdown IQ | 0.1 µA quiescent current in disabled state - reduces leakage drain in battery-backed systems, extending shelf life beyond 10 years. |
| High PSRR at 1 kHz | 75 dB rejection of input ripple - enables clean 1.2 V rail even when powered from noisy buck converter outputs in multi-rail PMIC architectures. |
| ESD robustness | 6 kV HBM rating - withstands handling and board assembly without additional protection, lowering system-level ESD design overhead. |
| Stable with low-ESR caps | Supports 0.7–1.0 µF X7R ceramics (5–500 mΩ ESR) - eliminates need for tantalum or aluminum electrolytics, improving reliability and temperature stability. |
Applications
| Smartphone Application | Tablet PC Application |
|---|---|
Use Scenario: Powering baseband processor I/O banks during active and sleep modes. IC Role / Device Role / Timing Role: Primary 1.2 V LDO delivering regulated core voltage with fast enable/disable sequencing aligned to CPU power states. Use Value: Auto-discharge prevents back-powering of disabled I/O domains, while 75 dB PSRR isolates digital switching noise from sensitive analog peripherals. | Use Scenario: Supplying image signal processor (ISP) core logic in dual-camera modules. IC Role / Device Role / Timing Role: Low-noise 1.2 V source for ISP digital logic, synchronized to camera frame capture timing via EN pin control. Use Value: 40 µV RMS noise avoids corruption of pixel data paths; 150 µs startup ensures ISP is ready before exposure begins. |
| Digital Still Camera | Portable Media Player |
Use Scenario: Biasing CMOS image sensor analog front-end (AFE) during preview and capture. IC Role / Device Role / Timing Role: Precision 1.2 V rail for AFE biasing, enabled only during active imaging to minimize power draw. Use Value: 250 mV dropout allows operation from partially discharged batteries; 0.1 µA shutdown IQ preserves battery charge between shots. | Use Scenario: Powering NAND flash memory controller in audio playback mode. IC Role / Device Role / Timing Role: Stable 1.2 V supply for flash interface logic, disabled during deep-sleep to eliminate leakage. Use Value: Pull-down discharge clears residual charge on flash VCC pins, preventing data corruption during wake-up transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6815TD/12H,125 | Same 1.2 V output, 150 mA rating, and SOT753 package but features high-ohmic (3-state) output instead of auto-discharge. | Lacks active pull-down; requires external discharge resistor or FET for controlled output discharge. | Select LD6815TD/12H,125 only if system design already includes external discharge circuitry or where output float is acceptable during disable. |
| Torex XC6219B122MR-G | 1.2 V, 150 mA LDO in SOT-25; PSRR = 65 dB @ 1 kHz; no integrated auto-discharge; 1 µA IQ in shutdown. | Lower PSRR and no pull-down function; requires external discharge solution and larger input/output capacitors for stability. | Choose XC6219B122MR-G only if footprint compatibility with SOT-25 is mandatory and auto-discharge is handled externally. |
Compared with LD6815TD/12H,125 and XC6219B122MR-G, the LD6815TD/12P,125 uniquely integrates 100 Ω pull-down for rapid output discharge without layout changes, delivers 10 dB higher PSRR for cleaner rails, and maintains identical SOT753 footprint-enabling drop-in replacement where auto-discharge is required.
Availability
LD6815TD/12P,125 is available at Aetrix Electronics and suitable for smartphone power management, tablet PC subsystem regulation, and portable media player battery optimization requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LD6815TD/12P,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 LD6815 series belongs to NXP's high-PSRR LDO portfolio, designed specifically for noise-sensitive portable electronics where clean, low-voltage rails and fast power sequencing are essential for system-level signal integrity and battery efficiency.
FAQ
What is the output voltage tolerance of the LD6815TD/12P,125 over temperature?
The LD6815TD/12P,125 delivers 1.2 V output with ±2% tolerance at Tamb = +25 °C and ±3% over the full operating range of −40 °C to +85 °C. This accuracy is maintained under load currents from 1 mA to 150 mA and input voltages from 2.3 V to 5.5 V, ensuring reliable core voltage delivery for precision analog and digital loads in the LD6815TD/12P,125 application space.
Does the LD6815TD/12P,125 require external capacitors, and what values are recommended?
Yes, the LD6815TD/12P,125 requires a 1.0 µF X7R ceramic capacitor on both input (IN) and output (OUT) pins, with minimum capacitance of 0.7 µF and ESR between 5 mΩ and 500 mΩ. These values ensure stability, optimal transient response, and compliance with the 150 µs startup and 300 µs shutdown timing specifications defined for the LD6815TD/12P,125 in its official product data sheet.
How does the auto-discharge function of the LD6815TD/12P,125 operate during disable?
When the EN pin is driven LOW (≤0.4 V), the LD6815TD/12P,125 activates an internal 100 Ω pull-down transistor between OUT and GND, discharging the output capacitor to <5% of VO(nom) within 300 µs. This eliminates reliance on external discharge components and prevents back-powering of upstream circuitry-a critical behavior confirmed in the LD6815TD/12P,125 block diagram and electrical characteristics table.
What is the maximum input voltage the LD6815TD/12P,125 can tolerate during transient conditions?
The LD6815TD/12P,125 supports a transient input voltage of up to +6.0 V on the IN pin for durations ≤4 ms, as specified in its Absolute Maximum Ratings. This headroom accommodates short-duration overshoots from DC-DC converters or hot-swap events, protecting the LD6815TD/12P,125 without requiring external clamping diodes in typical portable power architectures.
Is the LD6815TD/12P,125 compatible with lead-free reflow soldering processes?
Yes, the LD6815TD/12P,125 in SOT753 package is qualified for lead-free reflow per J-STD-020C, with a peak temperature rating of 260 °C for packages < 1.6 mm thick. Its moisture sensitivity level (MSL) complies with industry standards, and the device has been verified for reliability under standard Pb-free reflow profiles-ensuring robust assembly for the LD6815TD/12P,125 in high-volume manufacturing environments.
LD6815TD/12P,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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- 150 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Transient Voltage
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
LD6815TD/12P,125 FAQ
1.How can I place an order for LD6815TD/12P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6815TD/12P,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 LD6815TD/12P,125 reliable?
The price and inventory of LD6815TD/12P,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6815TD/12P,125 is usually 5 days.
3.What payment methods are accepted for LD6815TD/12P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6815TD/12P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6815TD/12P,125?
LD6815TD/12P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6815TD/12P,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 LD6815TD/12P,125?
For technical support, including LD6815TD/12P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6815TD/12P,125 requirements.
6.How does Aetrix verify that LD6815TD/12P,125 is sourced from the original manufacturer or authorized distributors?
All LD6815TD/12P,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 LD6815TD/12P,125 meets industry standards.
7.What is the process for return or replacement of LD6815TD/12P,125?
All LD6815TD/12P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6815TD/12P,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 LD6815TD/12P,125 part is unused and in its original packaging.
Return procedure for LD6815TD/12P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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