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NXP Semiconductors LD6815TD/28P,125
- Part No.:
- LD6815TD/28P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6815TD/28P,125.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,279
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Product details
Overview
LD6815TD/28P,125 from NXP Semiconductors is a fixed-output 2.8 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 low-noise power for precision analog rails in portable consumer electronics.
For engineers reviewing the LD6815TD/28P,125 datasheet, LD6815TD/28P,125 pinout, LD6815TD/28P,125 application, or LD6815TD/28P,125 equivalent, key selection criteria include its 2.8 V fixed output, SOT753 package footprint, 40 µV RMS output noise (10 Hz–100 kHz), 150 µs startup time, and 0.1 µA shutdown quiescent current - all critical for battery-powered mobile SoC power domains.
Technical Context
The LD6815TD/28P,125 implements a PMOS pass transistor architecture enabling stable regulation with minimal headroom. Its internal enable circuitry accepts 1.1 V to 5.5 V logic-high signals and drives the output to near-ground (via 100 Ω pull-down) when disabled - eliminating residual voltage hold-up in multi-rail systems.
Designed for high-PSRR noise suppression, it maintains 75 dB rejection at 1 kHz while delivering 150 mA with ±2% output accuracy over −40 °C to +85 °C ambient. The device requires only 1 µF ceramic output capacitance (X7R, ESR 5–500 mΩ) and integrates overcurrent and thermal protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.8 V - eliminates external feedback network; supports core/logic rails requiring precise low-voltage bias. |
| Max output current | 150 mA - sufficient for powering RF transceivers, camera ISPs, or audio codecs in compact handheld devices. |
| Dropout voltage | 250 mV at 150 mA - enables operation down to 3.05 V input, extending battery runtime in single-cell Li-ion systems. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding adjacent digital subsystems. |
| RMS output noise | 40 µV (10 Hz–100 kHz) - ensures clean supply for ADC references, PLLs, and RF front-ends. |
| Quiescent current | 0.1 µA in shutdown - minimizes standby leakage in always-on sensor nodes or wake-on-event circuits. |
| Startup time | 150 µs - meets fast-power-up requirements for camera modules and display drivers. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mount package: 2.9 × 1.5 × 1.0 mm body, 5-lead configuration with standard lead pitch of 0.95 mm. Compatible with reflow soldering per J-STD-020C MSL1 profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.3–5.5 V unregulated supply; requires ≥0.7 µF input capacitor for stability. |
| 2 GND | Supply ground | Common reference for input, output, and enable; must connect to low-impedance PCB ground plane. |
| 3 EN | Enable control | Active-HIGH logic input; 0.4 V max LOW threshold ensures compatibility with 1.8 V/3.3 V GPIOs. |
| 4 n.c. | No connection | Internally unconnected; no PCB trace or pad required - improves layout flexibility and reduces routing congestion. |
| 5 OUT | Regulated output | Delivers 2.8 V ±2% at up to 150 mA; includes auto-discharge path to GND when EN = LOW. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output to <5% VO(nom) within 300 µs after disable - prevents back-powering or latch-up in multi-supply systems. |
| Ultra-low shutdown current | 0.1 µA typical - enables >1-year battery life in maintenance-free IoT sensors with periodic wake cycles. |
| High ESD robustness | ±6 kV HBM - withstands handling and assembly without additional protection diodes in final product. |
| Stable with small ceramics | Supports 0.7–1.0 µF X7R capacitors (ESR 5–500 mΩ) - avoids costly tantalum or polymer caps and simplifies BOM. |
| Thermal protection | Internal foldback current limiting and thermal shutdown - prevents damage during sustained overload or poor PCB heatsinking. |
Applications
| Smartphone Power Management | Tablet PC Audio Subsystem |
|---|---|
Use Scenario: Supplying 2.8 V bias to cellular baseband processor I/O banks and RF front-end LNA stages. IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning switched-mode supply ripple before sensitive analog signal paths. Use Value: 75 dB PSRR and 40 µV RMS noise prevent AM modulation artifacts and SNR degradation in LTE/WCDMA receivers. | Use Scenario: Powering high-resolution DACs and headphone amplifiers in dual-core tablet platforms. IC Role / Device Role / Timing Role: Precision voltage source maintaining tight output accuracy across temperature and load transients. Use Value: ±2% output tolerance and 150 µs startup ensure glitch-free audio playback initiation and consistent dynamic range. |
| Digital Still Camera Sensor Bias | Portable Media Player Codec Rail |
Use Scenario: Delivering clean 2.8 V to CMOS image sensor analog front-end and timing controller. IC Role / Device Role / Timing Role: Low-dropout regulator with fast transient response stabilizing pixel readout clocks and ADC references. Use Value: 250 mV dropout extends usable battery voltage range; auto-discharge prevents sensor latch-up during rapid power cycling. | Use Scenario: Providing regulated 2.8 V to audio codec ICs in flash-based MP3 players with OLED displays. IC Role / Device Role / Timing Role: Standby-optimized LDO supplying always-on audio decode logic and real-time clock circuitry. Use Value: 0.1 µA shutdown current enables multi-week standby without battery replacement; SOT753 footprint saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0528DBVR | Lower IQ (250 nA), same 2.8 V output, but 200 mA rating and 170 mV dropout; no auto-discharge. | Lacks pull-down transistor - requires external discharge circuit for rail sequencing compliance. | Select when ultra-low quiescent current dominates over auto-discharge need and higher load margin is acceptable. |
| MCP1700T-2802E/TT | 2.8 V output, 250 mA rating, 600 mV dropout, 1.6 µA IQ; no auto-discharge or high-PSRR optimization. | Higher dropout and lower PSRR (60 dB) limit use in noise-sensitive RF/analog sections. | Choose for cost-sensitive, non-critical digital rails where PSRR and fast discharge are not required. |
Compared with TPS7A0528DBVR and MCP1700T-2802E/TT, the LD6815TD/28P,125 uniquely combines 2.8 V precision, 75 dB PSRR, and integrated auto-discharge in a 2.9 × 1.5 mm footprint - making it optimal for space-constrained, noise-sensitive mobile applications requiring clean, sequenced power delivery.
Availability
LD6815TD/28P,125 is available at Aetrix Electronics and suitable for smartphone power management, tablet PC audio subsystems, and digital still camera sensor bias applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LD6815TD/28P,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, engineered specifically for noise-sensitive analog and RF power domains in battery-powered mobile devices where clean, sequenced, and efficient voltage regulation is critical.
FAQ
What is the output voltage tolerance of the LD6815TD/28P,125 over temperature?
The LD6815TD/28P,125 maintains ±2% output voltage accuracy across the full operating ambient temperature range of −40 °C to +85 °C. At +25 °C, the tolerance tightens to ±0.5%, and the device guarantees this performance without external trimming components due to monolithic silicon process calibration.
Does the LD6815TD/28P,125 require an input capacitor?
Yes, the LD6815TD/28P,125 requires a minimum 0.7 µF ceramic input capacitor (X7R, ±30% tolerance) placed close to the IN and GND pins. This capacitor stabilizes the input supply during load transients and prevents oscillation - especially when fed from high-impedance sources like battery protection ICs or DC-DC converter outputs.
How does the auto-discharge function operate in the LD6815TD/28P,125?
When the EN pin is driven LOW, the LD6815TD/28P,125 activates an internal 100 Ω pull-down transistor between the OUT and GND pins. This discharges the output capacitance to <5% of 2.8 V within 300 µs, preventing back-powering of upstream regulators or unintended wake-up in multi-rail systems - no external FET or resistor is needed.
What is the maximum allowable input voltage for the LD6815TD/28P,125?
The absolute maximum input voltage for the LD6815TD/28P,125 is +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 even briefly risks permanent damage, as confirmed by IEC 60134 absolute maximum ratings.
Can the LD6815TD/28P,125 be used with ceramic capacitors having ESR below 5 mΩ?
No - the LD6815TD/28P,125 requires an external output capacitor with ESR between 5 mΩ and 500 mΩ for guaranteed stability. Ultra-low-ESR ceramics (e.g., <2 mΩ) may cause phase-margin loss and oscillation. Use X7R dielectric with specified ESR or add a small series resistor if necessary.
LD6815TD/28P,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):
- 2.8V
- 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/28P,125 FAQ
1.How can I place an order for LD6815TD/28P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6815TD/28P,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/28P,125 reliable?
The price and inventory of LD6815TD/28P,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/28P,125 is usually 5 days.
3.What payment methods are accepted for LD6815TD/28P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6815TD/28P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6815TD/28P,125?
LD6815TD/28P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6815TD/28P,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/28P,125?
For technical support, including LD6815TD/28P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6815TD/28P,125 requirements.
6.How does Aetrix verify that LD6815TD/28P,125 is sourced from the original manufacturer or authorized distributors?
All LD6815TD/28P,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/28P,125 meets industry standards.
7.What is the process for return or replacement of LD6815TD/28P,125?
All LD6815TD/28P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6815TD/28P,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/28P,125 part is unused and in its original packaging.
Return procedure for LD6815TD/28P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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