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NXP Semiconductors LD6815TD/29P,125
- Part No.:
- LD6815TD/29P,125
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LD6815TD/29P,125.pdf
- Description:
- IC REG LINEAR 2.9V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:45,000
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Product details
Overview
LD6815TD/29P,125 from NXP Semiconductors is a fixed-output 2.9 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/29P,125 datasheet, LD6815TD/29P,125 pinout, LD6815TD/29P,125 application, or LD6815TD/29P,125 equivalent, key selection criteria include its 2.9 V fixed output, 40 µV RMS noise (10 Hz–100 kHz), 150 µs startup time, 0.1 µA shutdown quiescent current, and SOT753 package compatibility with space-constrained mobile designs.
Technical Context
The LD6815TD/29P,125 integrates a PMOS pass transistor enabling low dropout and high PSRR performance. Its enable pin (EN) accepts active-HIGH logic (VIH ≥ 1.1 V), and internal circuitry ensures fast startup (150 µs) and controlled shutdown (300 µs) with active auto-discharge via a 100 Ω pull-down path to GND.
Designed for stability with 1 µF ceramic output capacitance (X7R, ESR 5–500 mΩ), it maintains ±0.5% output accuracy at +25 °C and ±3% over −40 °C to +85 °C ambient. Thermal resistance is 125 K/W (junction-to-ambient, typical), supporting operation up to +125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.9 V - eliminates external feedback network; supports core logic or I/O rails in mobile SoCs. |
| Max output current | 150 mA - sufficient for RF transceivers, camera modules, or sensor subsystems in handheld devices. |
| Dropout voltage | 250 mV at 150 mA - enables regulation from 3.15 V input, maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| RMS output noise | 40 µV (10 Hz–100 kHz) - meets low-noise requirements for ADC references or RF biasing. |
| Quiescent current | 0.1 µA in shutdown - preserves battery life during deep sleep modes in always-on sensors. |
| Startup time | 150 µs - enables rapid power-up of peripherals without system-level timing bottlenecks. |
| Auto-discharge Rpd | 100 Ω - actively pulls output to GND within 300 µs after disable, preventing floating or latch-up in downstream circuits. |
Pinout & Package
SOT753 (TSOP5) plastic surface-mount package, 2.9 × 1.5 × 1.0 mm, 5-lead, monolithic silicon construction. Compatible with standard reflow soldering profiles per J-STD-020C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.3–5.5 V supply; requires 1 µF input capacitor for stability and transient response. |
| 2 GND | Ground reference | Common return path for input, output, and enable; must connect to low-impedance ground plane. |
| 3 EN | Enable control | Active-HIGH logic input; 0.1 µA shutdown current when pulled ≤0.4 V; 1.1–5.5 V valid HIGH range. |
| 4 n.c. | No connection | Internally unconnected; must remain floating-no external tie or routing. |
| 5 OUT | Regulated output | Delivers 2.9 V ±3% 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 GND in <300 µs upon disable-prevents residual voltage hold-up in powered-down subsystems. |
| Ultra-low shutdown IQ | 0.1 µA quiescent current in disabled state-critical for multi-week battery life in IoT endpoint devices. |
| High PSRR (75 dB @ 1 kHz) | Rejects ripple from noisy switchers or shared power rails, enabling clean analog/RF supply without additional filtering. |
| ESD robustness | 6 kV HBM rating-survives handling and board assembly without special ESD precautions beyond standard practices. |
| Stable with 1 µF ceramic cap | Eliminates need for large tantalum or electrolytic capacitors; reduces BOM cost and PCB area in compact layouts. |
Applications
| Smartphone Power Management | Tablet PC Camera Module |
|---|---|
|
Use Scenario: Supplying 2.9 V bias to image signal processors (ISPs) and CMOS image sensors during active capture mode. IC Role / Device Role / Timing Role: Low-noise, fast-startup LDO delivering regulated rail independent of main PMIC switching noise. Use Value: 40 µV RMS noise prevents pixel pattern noise; 150 µs startup synchronizes with sensor frame trigger signals. |
Use Scenario: Providing stable 2.9 V to autofocus actuators and lens drivers in dual-camera tablet configurations. IC Role / Device Role / Timing Role: Auto-discharge LDO ensuring rapid rail collapse between focus operations to prevent actuator drift. Use Value: 100 Ω pull-down discharges output in <300 µs, eliminating mechanical overshoot and improving focus repeatability. |
| Digital Still Camera LCD Interface | Portable Media Player Audio Codec |
|
Use Scenario: Powering 2.9 V LCD driver ICs and touch controller interfaces in compact DSCs. IC Role / Device Role / Timing Role: Fixed-output LDO with tight load regulation (0.005 %/mA) maintaining display contrast across varying backlight loads. Use Value: ±3% output accuracy over −40 °C to +85 °C ensures consistent gamma correction and color fidelity in outdoor environments. |
Use Scenario: Delivering clean 2.9 V to stereo audio DACs and headphone amplifiers in battery-powered media players. IC Role / Device Role / Timing Role: High-PSRR LDO isolating sensitive analog audio paths from digital switching noise on shared PCB planes. Use Value: 75 dB PSRR at 1 kHz attenuates digital clock feedthrough, reducing audible hiss and improving SNR by >15 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0529PDQNR | 2.9 V fixed, 200 mA, 170 mV dropout, 45 µV noise, but no auto-discharge; 0.5 µA shutdown IQ. | Lacks active discharge-requires external MOSFET or resistor network for rail collapse. | Select when lower dropout or higher current is prioritized over auto-discharge and ultra-low shutdown IQ. |
| MCP1700T-2902E/TT | 2.9 V fixed, 250 mA, 600 mV dropout, 30 µV noise, 1.9 µA shutdown IQ, no auto-discharge. | Higher dropout limits use with <3.5 V inputs; no integrated discharge path. | Choose for cost-sensitive consumer applications where 0.1 µA shutdown and fast discharge are non-critical. |
Compared with TPS7A0529PDQNR and MCP1700T-2902E/TT, the LD6815TD/29P,125 uniquely combines 0.1 µA shutdown current, 100 Ω auto-discharge, and 75 dB PSRR in a 2.9 V, 150 mA LDO-making it optimal for battery-constrained, noise-sensitive portable systems requiring rapid, controlled power sequencing.
Availability
LD6815TD/29P,125 is available at Aetrix Electronics and suitable for smartphone power management, tablet PC camera modules, digital still cameras, portable media players, and mobile internet devices requiring stable component supply with guaranteed long-term continuity.
Supply support for LD6815TD/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 mobile applications.
The LD6815 series was designed specifically for ultra-low-noise, high-PSRR power regulation in space-constrained portable electronics-emphasizing fast transient response, minimal quiescent current, and integrated auto-discharge for reliable power sequencing.
FAQ
What is the output voltage tolerance of the LD6815TD/29P,125 over temperature?
The LD6815TD/29P,125 delivers 2.9 V output with ±3% tolerance across the full operating ambient temperature range of −40 °C to +85 °C. At +25 °C, the tolerance tightens to ±0.5%, ensuring precision for voltage-sensitive analog blocks. This specification is verified per Table 8 in the NXP product data sheet Rev. 2 (2012).
Does the LD6815TD/29P,125 require an input capacitor, and if so, what value?
Yes, the LD6815TD/29P,125 requires a minimum 0.7 µF input capacitor (recommended 1.0 µF X7R ceramic) placed close to the IN and GND pins. This stabilizes the input rail during load transients and improves PSRR performance. The capacitor must meet ±30% tolerance over temperature and operate reliably from −40 °C to +125 °C.
How does the auto-discharge function work in the LD6815TD/29P,125?
When the EN pin is driven LOW (≤0.4 V), the LD6815TD/29P,125 activates an internal 100 Ω pull-down transistor between the OUT and GND pins. This discharges the output capacitance to <5% of VO(nom) within 300 µs, preventing unintended operation of downstream circuitry during power-down sequences.
What is the maximum allowable input voltage for the LD6815TD/29P,125?
The absolute maximum input voltage for the LD6815TD/29P,125 is +6.0 V for 4 ms transients, per Table 5 in the NXP datasheet. For continuous operation, the recommended input range is 2.3 V to 5.5 V. Exceeding 5.5 V continuously risks thermal overstress and reduced reliability, even if below the 6.0 V transient limit.
Can the LD6815TD/29P,125 be used with ceramic output capacitors smaller than 1 µF?
No-the LD6815TD/29P,125 requires a minimum 0.7 µF external ceramic output capacitor (CL(ext)) for stability, with 1.0 µF recommended. Using capacitors below 0.7 µF may cause oscillation or poor transient response. The capacitor must also maintain ESR between 5 mΩ and 500 mΩ across temperature and frequency.
LD6815TD/29P,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):
- 2.9V
- 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/29P,125 FAQ
1.How can I place an order for LD6815TD/29P,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6815TD/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 LD6815TD/29P,125 reliable?
The price and inventory of LD6815TD/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 LD6815TD/29P,125 is usually 5 days.
3.What payment methods are accepted for LD6815TD/29P,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6815TD/29P,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6815TD/29P,125?
LD6815TD/29P,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6815TD/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 LD6815TD/29P,125?
For technical support, including LD6815TD/29P,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6815TD/29P,125 requirements.
6.How does Aetrix verify that LD6815TD/29P,125 is sourced from the original manufacturer or authorized distributors?
All LD6815TD/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 LD6815TD/29P,125 meets industry standards.
7.What is the process for return or replacement of LD6815TD/29P,125?
All LD6815TD/29P,125 units undergo pre-shipment inspection (PSI). If there is an issue with LD6815TD/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 LD6815TD/29P,125 part is unused and in its original packaging.
Return procedure for LD6815TD/29P,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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