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NXP Semiconductors LD6815TD/30P,125
- Part No.:
- LD6815TD/30P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6815TD/30P,125.pdf
- Description:
- IC REG LINEAR 3V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,079
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Product details
Overview
LD6815TD/30P,125 from NXP Semiconductors is a fixed-output 3.0 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 enabled via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and targets power-sensitive portable electronics requiring clean, stable voltage rails.
For engineers reviewing the LD6815TD/30P,125 datasheet, LD6815TD/30P,125 pinout, LD6815TD/30P,125 application, or LD6815TD/30P,125 equivalent, this page delivers verified specifications, package details, real-world use cases, and validated alternative options - all grounded in NXP's official Rev. 2 product data sheet dated 14 December 2012.
Technical Context
The LD6815TD/30P,125 implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its enable input (EN) is active-HIGH with VIH ≥ 1.1 V and VIL ≤ 0.4 V, and it features internal overcurrent protection plus thermal shutdown.
In disabled mode, the device actively pulls the output to ground via a 100 Ω internal pull-down transistor (auto-discharge function), ensuring rapid discharge of downstream capacitance. Startup time is 150 μs, and shutdown time is 300 μs under specified test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% (at +25 °C, IOUT = 1 mA); supports precision biasing for core logic or analog circuitry. |
| Max Output Current | 150 mA continuous; sufficient for powering single-core microcontrollers, sensors, or RF front-ends in portable devices. |
| Dropout Voltage | 250 mV at 150 mA; enables operation with minimal VIN–VOUT margin, improving battery efficiency in 3.3 V or Li-ion systems. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters, critical for noise-sensitive analog/RF stages. |
| RMS Output Noise | 40 μV (10 Hz–100 kHz); ensures low-noise supply for ADC references, audio codecs, or PLLs. |
| Quiescent Current | 0.1 μA in shutdown; minimizes battery drain during system sleep modes. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIO control without level shifting. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mount package: 2.9 × 1.5 × 1.0 mm footprint, 5-pin lead count, industry-standard pin pitch (0.95 mm), optimized for space-constrained mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input voltage | Accepts 2.3–5.5 V supply; requires ≥0.7 μF input capacitor for stability and transient response. |
| 2 - GND | Supply ground reference | Common return path for input, output, and enable; must connect to low-impedance ground plane. |
| 3 - EN | Active-HIGH enable input | Drives regulator ON/OFF; logic HIGH ≥1.1 V enables output; logic LOW ≤0.4 V disables with auto-discharge. |
| 4 - n.c. | No connection | Internally unconnected; must remain floating-no external tie or routing required. |
| 5 - OUT | Regulated output voltage | Delivers fixed 3.0 V; requires ≥0.7 μF output capacitor (X7R, ESR 5–500 mΩ) for loop stability and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output capacitance rapidly upon disable, preventing residual voltage hold-up in power sequencing. |
| Ultra-low shutdown current | 0.1 μA typical quiescent current in disabled state, extending battery life in always-on or low-power wake-up applications. |
| High PSRR (75 dB @ 1 kHz) | Rejects ripple from noisy switchers (e.g., buck converters), eliminating need for additional LC filtering in compact designs. |
| ESD robustness | 6 kV HBM rating ensures reliability during board assembly and end-user handling without added protection circuitry. |
| Thermal protection | Internal thermal shutdown activates at Tj > +125 °C, preventing damage during overload or poor heatsinking conditions. |
Applications
| Smartphone Core Rail | Tablet PC Audio Codec Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series application processor I/O or memory interface rails where tight voltage tolerance and fast transient response are required. IC Role / Device Role / Timing Role: Primary LDO delivering stable 3.0 V to digital subsystems; enables clean power domain separation from noisy PMIC outputs. Use Value: 250 mV dropout allows direct regulation from 3.3 V rail or single-cell Li-ion (3.6 V nominal), while 75 dB PSRR prevents digital switching noise from corrupting timing margins. |
Use Scenario: Supplies low-noise 3.0 V bias to stereo audio codec ICs in tablet PCs, supporting high-fidelity playback and recording. IC Role / Device Role / Timing Role: Low-noise post-regulator placed after main PMIC; filters switching artifacts before reaching sensitive analog signal paths. Use Value: 40 μV RMS noise (10 Hz–100 kHz) and 75 dB PSRR ensure SNR > 95 dB, meeting Hi-Res Audio specification requirements without extra ferrite beads or capacitors. |
| Digital Still Camera Sensor Bias | Portable Media Player RF Front-End |
|
Use Scenario: Provides regulated 3.0 V to CMOS image sensor analog blocks (e.g., ADC reference, pixel array bias) in compact DSC modules. IC Role / Device Role / Timing Role: Precision analog LDO with tight output accuracy (±2%) and low drift over temperature. Use Value: ±2% output variation across –40 °C to +85 °C ambient ensures consistent sensor gain calibration and reduced white balance drift in varying environments. |
Use Scenario: Powers Bluetooth/Wi-Fi transceiver RF sections in portable media players, where supply noise directly impacts EVM and receiver sensitivity. IC Role / Device Role / Timing Role: Dedicated LDO isolating RF circuitry from shared digital supply rails. Use Value: 150 μs startup time enables rapid RF activation during connection handshaking, while auto-discharge prevents unintended RF wake-up during deep-sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P302MR-G | 3.0 V fixed, 150 mA, SOT-23-5; PSRR = 65 dB @ 1 kHz; no auto-discharge; 1.0 μA shutdown current. | Lacks pull-down transistor - requires external discharge circuit for controlled shutdown sequencing. | Select when board space permits SOT-23-5 and auto-discharge is not required; verify PSRR meets system noise floor. |
| Richtek RT9013-30GB | 3.0 V fixed, 300 mA, SOT-23-5; PSRR = 70 dB @ 1 kHz; no auto-discharge; 0.5 μA shutdown current. | Higher current rating but no integrated discharge path; larger dropout (300 mV @ 150 mA). | Choose for higher load headroom where output capacitance is small and discharge is managed externally. |
Compared with XC6206P302MR-G and RT9013-30GB, the LD6815TD/30P,125 uniquely integrates auto-discharge and achieves superior PSRR (75 dB), making it optimal for tightly sequenced, noise-critical portable systems where board area and external components must be minimized.
Availability
LD6815TD/30P,125 is available at Aetrix Electronics and suitable for smartphones, tablet PCs, and digital still cameras requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LD6815TD/30P,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 was designed specifically for ultra-low-noise, high-PSRR power regulation in space-constrained portable electronics - emphasizing fast transient response, minimal dropout, and integrated power sequencing features like auto-discharge.
FAQ
What is the output voltage tolerance of the LD6815TD/30P,125 over temperature?
The LD6815TD/30P,125 delivers a nominal 3.0 V output with ±2% variation at +25 °C and ±3% over the full –40 °C to +85 °C operating ambient range. This accuracy is confirmed in Table 8 of the NXP datasheet under "Output voltage variation" for VO(nom) ≥ 1.8 V. The LD6815TD/30P,125 maintains this performance without external trimming components.
Does the LD6815TD/30P,125 require an input capacitor, and if so, what value?
Yes - the LD6815TD/30P,125 requires a minimum 0.7 μF input capacitor (X7R dielectric, ±30% tolerance) placed close to the IN and GND pins. The recommended value is 1.0 μF, as specified in Table 9 and Section 10.1 of the datasheet. This capacitor stabilizes the input rail during load transients and reduces noise coupling into the regulator.
How does the auto-discharge function work in the LD6815TD/30P,125?
When the EN pin is driven LOW (≤0.4 V), the LD6815TD/30P,125 activates an internal 100 Ω pull-down transistor between OUT and GND. This provides a low-ohmic discharge path, reducing output voltage to <5% of VO(nom) within 300 μs (tsd(reg)), as measured with 1 μF output capacitance. This eliminates need for external discharge resistors in power sequencing designs.
What is the maximum allowable input voltage for the LD6815TD/30P,125?
The absolute maximum input voltage for the LD6815TD/30P,125 is +6.0 V for 4 ms transients, per Table 5 (Limiting Values). For continuous operation, the recommended input range is 2.3 V to 5.5 V (Table 6). Exceeding 5.5 V continuously risks exceeding thermal limits or degrading long-term reliability, even if below the 6.0 V transient limit.
Is the LD6815TD/30P,125 RoHS-compliant and halogen-free?
Yes - the LD6815TD/30P,125 is manufactured in compliance with RoHS Directive 2011/65/EU and is halogen-free per NXP's material declarations. The SOT753 package uses lead-free matte tin terminations, and the device meets JEDEC J-STD-020C moisture sensitivity level (MSL) 1 requirements for reflow soldering.
LD6815TD/30P,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):
- 3V
- 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/30P,125 FAQ
1.How can I place an order for LD6815TD/30P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6815TD/30P,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/30P,125 reliable?
The price and inventory of LD6815TD/30P,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/30P,125 is usually 5 days.
3.What payment methods are accepted for LD6815TD/30P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6815TD/30P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6815TD/30P,125?
LD6815TD/30P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6815TD/30P,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/30P,125?
For technical support, including LD6815TD/30P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6815TD/30P,125 requirements.
6.How does Aetrix verify that LD6815TD/30P,125 is sourced from the original manufacturer or authorized distributors?
All LD6815TD/30P,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/30P,125 meets industry standards.
7.What is the process for return or replacement of LD6815TD/30P,125?
All LD6815TD/30P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6815TD/30P,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/30P,125 part is unused and in its original packaging.
Return procedure for LD6815TD/30P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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