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Texas Instruments TPS76815QD
- Part No.:
- TPS76815QD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS76815QD.pdf
- Description:
- IC REG LINEAR 1.5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:290
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Product details
Overview
TPS76815QD from Texas Instruments is a 1.5-V fixed-output, 1-A low-dropout (LDO) linear voltage regulator in SOIC-8 package, featuring 230 mV typical dropout at 1 A, ±2% output accuracy over –40°C to +125°C, 85 µA typical quiescent current, and open-drain power-good (PG) output. It delivers stable regulation for battery-powered microcontrollers and DSPs requiring precise low-voltage rails.
For engineers reviewing the TPS76815QD datasheet, TPS76815QD pinout, TPS76815QD application, or TPS76815QD equivalent, this page provides verified technical context, validated pin functions, real-world application scenarios, and confirmed alternative parts with documented functional and packaging differences.
Technical Context
The TPS76815QD uses a PMOS pass transistor architecture enabling ultralow, load-independent quiescent current (85 µA typ) and fast transient response-stabilized with only a 10-µF output capacitor. Its internal reference is 1.1834 V, and feedback is internally connected for fixed 1.5-V operation (FB/NC pin unused).
Power-good monitoring is implemented via an open-drain comparator that asserts low when output falls to 92–98% of nominal (1.38–1.47 V), with 0.5% hysteresis. Enable (EN) input accepts TTL-compatible logic: high ≥1.7 V disables regulator (quiescent current <1 µA), low ≤0.9 V enables operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.5 V ±2% over –40°C to +125°C, 0–1 A load - ensures stable core supply for low-voltage logic. |
| Dropout voltage | 230 mV typical at 1 A, 25°C - enables regulation from 1.73 V input, critical for single-cell Li-ion or LiFePO₄ systems. |
| Quiescent current | 85 µA typical, independent of load - extends battery life in always-on sensor nodes and portable instrumentation. |
| Power-good threshold | 92–98% of 1.5 V (1.38–1.47 V) with 0.5% hysteresis - provides reliable reset signaling without external comparators. |
| Input voltage range | 2.7 V to 10 V - supports wide-input industrial supplies while limiting max VIN to prevent overstress. |
| Thermal shutdown | 150°C junction trip, 130°C hysteresis - protects against sustained overload in enclosed enclosures. |
| ESR range (output cap) | 60 mΩ to 1.5 Ω - accommodates solid tantalum, aluminum electrolytic, and multilayer ceramic capacitors. |
Pinout & Package
TPS76815QD is housed in an 8-pin SOIC (D) package with exposed pad thermal enhancement (not electrically connected). Pin 1 is GND; pins 3 and 4 are parallel IN inputs; pins 5 and 6 are parallel OUT outputs; pin 8 is open-drain PG; pin 2 is EN; pin 7 is FB/NC (no internal connection for fixed 1.5-V version).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Regulator ground reference and primary thermal path - must be connected to large copper pour for thermal management. |
| 2 | EN | Active-low enable input - tie to GND for always-on operation; drive high (>1.7 V) to enter ultra-low-IQ shutdown (<1 µA). |
| 3, 4 | IN | Parallel input voltage terminals - reduce trace resistance and improve PSRR by splitting input current path. |
| 5, 6 | OUT | Parallel regulated output terminals - lower effective output impedance and improve load transient response. |
| 7 | FB/NC | No internal connection for TPS76815QD - left unconnected; not used in fixed-output configuration. |
| 8 | PG | Open-drain power-good output - requires external pull-up resistor (e.g., 10 kΩ to 3.3 V) to signal valid regulation. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass element | Enables 230 mV dropout at 1 A and eliminates base-drive current dependency - improves efficiency and simplifies thermal design. |
| Stable with 10-µF output capacitor | Reduces BOM cost and board space vs. traditional LDOs requiring >47 µF - compatible with low-ESR ceramics and tantalums. |
| Ultralow 85 µA quiescent current | Maintains constant IQ across full 0–1 A load range - enables multi-year battery life in IoT endpoint devices. |
| Integrated power-good monitor | Provides accurate 1.5-V rail validation without external circuitry - simplifies system-level reset sequencing and fault detection. |
| Thermal and current protection | Combines foldback current limit (~1.7 A) and 150°C thermal shutdown - prevents catastrophic failure during short-circuit or overtemperature events. |
Applications
| Battery-Powered Microcontroller Systems | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Powering ARM Cortex-M0+ or RISC-V MCU cores operating at 1.5 V from a single LiFePO₄ cell (2.5–3.65 V). IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 1.5-V VDD_IO/VDD_CORE rail with fast line/load transient response. Use Value: 230 mV dropout allows >90% usable battery capacity; 85 µA IQ extends shelf life in sleep-mode applications. |
Use Scenario: Supplying precision analog front-end (AFE) ICs and 16-bit ADCs in factory-floor temperature/pressure transmitters. IC Role / Device Role / Timing Role: Low-noise, low-drift bias rail for reference buffers and op-amp stages requiring <1% output variation. Use Value: ±2% accuracy and 55 µVrms noise (at 1.8 V variant, representative of family) ensure sub-LSB measurement integrity. |
| Automotive Body Control Modules | Medical Wearable Monitoring Devices |
|
Use Scenario: Regulating 1.5-V supply for CAN transceiver logic and EEPROM interface in door module ECUs. IC Role / Device Role / Timing Role: Robust, AEC-Q100 qualified (Q-grade) LDO providing fault-tolerant power under cold-crank (2.7 V) and load-dump conditions. Use Value: –40°C to +125°C operation and integrated thermal shutdown meet automotive environmental requirements without derating. |
Use Scenario: Powering ultra-low-power ECG/PPG SoCs in patch-style monitors operating continuously for 7+ days on coin-cell batteries. IC Role / Device Role / Timing Role: Primary voltage regulator enabling deep-sleep modes with <1 µA shutdown current and fast wake-up response. Use Value: 85 µA active IQ and <1 µA shutdown current directly translate to extended runtime and reduced battery replacement frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76815QPWP | Same electrical specs, but in 20-pin HTSSOP (PWP) package with 7 GND/HSINK pins - 32.6°C/W θJA vs. 172°C/W for SOIC-8. | Required for higher-power designs (>500 mW dissipation) or where PCB thermal relief is constrained. | Select TPS76815QPWP when thermal performance limits SOIC-8's 568 mW max at +25°C ambient. |
| TLV70015DCKR | Lower IQ (30 µA), smaller SOT-23-5 package, but only 200 mA output and 170 mV dropout at 200 mA - not 1-A rated. | Suitable for sub-200 mA loads where size and ultra-low IQ outweigh current capability needs. | Choose TLV70015DCKR only for space-constrained, low-current applications; not a functional replacement for 1-A use cases. |
Compared with TPS76815QD, TPS76815QPWP offers superior thermal handling in high-power-density layouts, while TLV70015DCKR trades current capacity and package robustness for minimal footprint and quiescent current - neither is pin-compatible, and both require PCB redesign.
Availability
TPS76815QD is available at Aetrix Electronics and suitable for battery-powered microcontrollers, industrial sensor signal conditioning, and automotive body control modules requiring stable component supply across long production lifecycles.
Supply support for TPS76815QD 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of LDO design expertise and broad automotive/industrial qualification.
The TPS768xxQ family was engineered for high-reliability, low-power applications demanding fast transient response, ultralow quiescent current, and robust thermal protection - targeting portable, automotive, and industrial systems.
FAQ
What is the minimum input voltage required for TPS76815QD to regulate at 1.5 V?
The minimum input voltage for TPS76815QD is the greater of 2.7 V or VOUT + VDO. With a typical dropout of 230 mV at 1 A, the device regulates down to 1.73 V input. However, per datasheet absolute minimum VI is 2.7 V - so TPS76815QD requires ≥2.7 V input to operate within specification, even though its dropout would allow lower.
Does TPS76815QD require an external feedback resistor network?
No. TPS76815QD is a fixed-output 1.5-V variant; its FB/NC pin (pin 7) has no internal connection and must be left unconnected. Only the adjustable TPS76801 requires external R1/R2 resistors - TPS76815QD uses internal feedback for regulation.
How is the power-good (PG) output of TPS76815QD used in system design?
The PG pin on TPS76815QD is an open-drain output that goes low when VOUT drops below 92–98% of 1.5 V (1.38–1.47 V). It requires an external pull-up resistor (e.g., 10 kΩ to 3.3 V) and is commonly used to drive microcontroller reset inputs or low-battery warning logic - ensuring deterministic system startup and fault reporting.
Can TPS76815QD be paralleled with another TPS76815QD for higher current?
No - TPS76815QD is not designed for current sharing. Its output stage lacks built-in current-balancing features, and mismatched dropout voltages between units would cause uneven load distribution. For >1 A, select a higher-current LDO or use a discrete current-sharing scheme with external components.
What thermal considerations apply to TPS76815QD in SOIC-8 package?
TPS76815QD in SOIC-8 (D) has a junction-to-ambient thermal resistance (θJA) of 172°C/W with no airflow. At 1 A and 2.7 V input (1.2 V drop), power dissipation is 1.2 W - raising junction temperature by ~206°C above ambient. Thus, derating is essential: max continuous power is 568 mW at +25°C, requiring heatsinking or airflow for higher loads.
TPS76815QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS76815QD FAQ
1.How can I place an order for TPS76815QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76815QD 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 TPS76815QD reliable?
The price and inventory of TPS76815QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76815QD is usually 5 days.
3.What payment methods are accepted for TPS76815QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76815QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76815QD?
TPS76815QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76815QD 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 TPS76815QD?
For technical support, including TPS76815QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76815QD requirements.
6.How does Aetrix verify that TPS76815QD is sourced from the original manufacturer or authorized distributors?
All TPS76815QD 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 TPS76815QD meets industry standards.
7.What is the process for return or replacement of TPS76815QD?
All TPS76815QD units undergo pre-shipment inspection (PSI). If there is an issue with TPS76815QD, 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 TPS76815QD part is unused and in its original packaging.
Return procedure for TPS76815QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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