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Texas Instruments TPS76818QPWP
- Part No.:
- TPS76818QPWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS76818QPWP.pdf
- Description:
- IC REG LINEAR 1.8V 1A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
TPS76818QPWP from Texas Instruments is a 1.8-V fixed-output, 1-A low-dropout (LDO) voltage regulator in a 20-pin HTSSOP (PWP) package. It features 230-mV typical dropout at 1 A, ±2% output accuracy over temperature and load, 85-µA quiescent current, fast transient response with 10-µF output capacitor stability, and open-drain power-good (PG) monitoring. It is used in battery-powered portable electronics requiring stable, low-noise 1.8-V supply for DSPs, FPGAs, and memory interfaces.
For engineers reviewing the TPS76818QPWP datasheet, TPS76818QPWP pinout, TPS76818QPWP application, or TPS76818QPWP equivalent, key selection criteria include dropout voltage at full load, PG threshold hysteresis, thermal performance in PWP package, and compatibility with low-ESR ceramic/tantalum output capacitors.
Technical Context
The TPS76818QPWP uses a PMOS pass transistor architecture enabling ultralow, load-independent quiescent current (85 µA typ) and linear dropout behavior-unlike PNP-based LDOs that suffer from rising base current in dropout. Its internal 1.1834-V reference and error amplifier deliver tight regulation across –40°C to +125°C junction temperature.
Power-good logic monitors output voltage with 92–98% VO trip threshold and 0.5% VO hysteresis; PG asserts low when VO falls below threshold and requires external pull-up. The device includes thermal shutdown (150°C typ) and current limiting (~1.7 A), and operates stably with zero minimum load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% over –40°C to +125°C, 0–1 A load, ensuring reliable core voltage for 1.8-V logic families. |
| Dropout Voltage | 230 mV typical at 1 A and +25°C; enables operation down to VIN = 2.03 V while maintaining regulation. |
| Quiescent Current | 85 µA typical, independent of load; extends battery life in always-on subsystems without sacrificing regulation. |
| Power-Good Threshold | 92–98% of nominal VO with 0.5% hysteresis; provides precise undervoltage detection for system reset sequencing. |
| Output Capacitor | Stable with ≥10 µF, 60 mΩ–1.5 Ω ESR; supports compact, low-profile ceramic or tantalum solutions. |
| Thermal Protection | Shuts down at TJ ≈ 150°C; resumes operation after cooling to ≈130°C-prevents permanent damage under sustained overload. |
| Enable Input | TTL-compatible EN pin (VIH = 1.7 V, VIL = 0.9 V); reduces quiescent current to <1 µA in shutdown mode. |
Pinout & Package
TPS76818QPWP is housed in a thermally enhanced 20-pin HTSSOP (PWP) package with exposed thermal pad (GND/HSINK on pins 1, 2, 9–12, 19, 20) for improved heat dissipation. The package supports 2.3 W power dissipation at TA = +70°C with recommended copper heatsink pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND/HSINK (1,2,9–12,19,20) | Ground reference and thermal sink | Multiple GND pins reduce impedance and improve thermal transfer; must be soldered to PCB copper pour for rated performance. |
| EN (5) | Enable control input | Active-high TTL-level input; drives regulator into <1 µA shutdown state when pulled low. |
| IN (6,7) | Input voltage supply | Dual-input pins reduce trace resistance and inductance; accepts 2.7–10 V with 13.5 V absolute max rating. |
| OUT (13,14) | Regulated output | Dual-output pins lower path resistance and improve current sharing; connects directly to load and 10-µF CO. |
| PG (16) | Open-drain power-good indicator | Active-low signal; requires external pull-up resistor to monitor output health for reset or battery warning logic. |
| FB/NC (15) | Feedback input / No-connect | No-connect for fixed-output TPS76818QPWP; left unconnected per datasheet-no external divider required. |
| NC (4,8,17,18) | No internal connection | Unused pins; must remain unconnected and may be left floating or tied to GND for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables 230-mV dropout at 1 A and eliminates load-dependent quiescent current rise-critical for battery runtime. |
| Fast Transient Response | Maintains <±10 mV output deviation during 1-A load steps with 10-µF CO, reducing need for bulk capacitance. |
| Zero Minimum Load Requirement | Operates stably from 0 mA to 1 A-simplifies design for intermittent or ultra-low-power sleep modes. |
| Integrated Thermal Shutdown | Auto-recovery protection at ~150°C junction temperature prevents latch-up and enables robust field operation. |
| Open-Drain Power-Good Output | Provides accurate, hysteresis-controlled VO monitoring without additional comparator circuitry or BOM cost. |
Applications
| Portable Medical Sensors | FPGA Core Power |
|---|---|
Use Scenario: Wearable ECG patch with ultra-low-power MCU and analog front-end operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.8-V LDO supplying digital core and ADC reference; regulates down from 3.0–4.2 V battery range. Use Value: 85-µA quiescent current extends battery life >3× vs. legacy LDOs; 230-mV dropout ensures full regulation until battery reaches 2.03 V. | Use Scenario: Low-cost industrial FPGA development board requiring clean, sequenced 1.8-V I/O and core rail. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 1.8-V supply to FPGA banks with PG-driven power-on reset coordination. Use Value: PG output with 0.5% hysteresis enables precise POR timing; dual IN/OUT pins reduce IR drop in high-current routing. |
| Automotive Infotainment SoC | Industrial PLC I/O Module |
Use Scenario: In-vehicle display controller using TI Jacinto processor with 1.8-V I/O domain powered from 5-V bus. IC Role / Device Role / Timing Role: Point-of-load regulator converting 5-V supply to 1.8-V for interface logic; operates across –40°C to +105°C ambient. Use Value: ±2% output accuracy over full temp/load ensures signal integrity; thermal shutdown protects against enclosure overheating. | Use Scenario: DIN-rail mounted PLC module with isolated 24-V input powering 1.8-V communication ICs (e.g., RS-485 transceivers). IC Role / Device Role / Timing Role: Secondary LDO generating 1.8-V rail from intermediate 3.3-V supply; withstands industrial ESD (2 kV HBM). Use Value: Stable with 10-µF ceramic output cap simplifies layout; EN pin enables firmware-controlled power cycling of peripheral rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76818QD | Same electrical specs but in 8-pin SOIC (D) package; higher RθJA (172°C/W vs. 32.6°C/W), lower max power dissipation (312 mW at +70°C). | Suitable for low-power, space-constrained PCBs where thermal budget allows; not recommended for >500 mA continuous loads in enclosed environments. | Select TPS76818QD only if board area is critical and thermal margin exceeds 25°C above ambient at full load. |
| TPS7A2018PDBVR | Lower IQ (6.5 µA), smaller SOT-23-5 package, but lower 300-mA output current and no PG output; dropout 175 mV at 300 mA. | Targeted at ultra-low-power sensor nodes-not suitable for 1-A FPGA/core applications requiring PG monitoring or thermal headroom. | Choose TPS7A2018PDBVR only for sub-300-mA, battery-critical designs where PG and thermal robustness are nonessential. |
Compared with TPS76818QD and TPS7A2018PDBVR, the TPS76818QPWP uniquely balances 1-A capability, integrated PG, and thermally optimized PWP packaging-making it the only option among the three qualified for high-current, safety-monitored industrial and automotive point-of-load use cases.
Availability
TPS76818QPWP is available at Aetrix Electronics and suitable for portable medical devices, FPGA power delivery, automotive infotainment systems, and industrial PLC modules requiring stable component supply with extended temperature support and long-term lifecycle assurance.
Supply support for TPS76818QPWP 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS768xxQ family was engineered for high-reliability, battery-sensitive applications demanding fast transient response, low dropout, and integrated power monitoring-targeting portable instrumentation, automotive control units, and industrial edge nodes.
FAQ
What is the maximum input voltage for the TPS76818QPWP?
The TPS76818QPWP supports an input voltage range of 2.7 V to 10 V under recommended operating conditions. Its absolute maximum input voltage is 13.5 V, but operation above 10 V risks exceeding safe power dissipation limits and is not guaranteed for regulation or reliability. For 1.8-V output, minimum VIN is 2.7 V or VO + 1 V (2.8 V), whichever is greater-so 2.8 V is the practical lower bound for full-load operation.
Does the TPS76818QPWP require an external feedback resistor network?
No, the TPS76818QPWP is a fixed-output 1.8-V regulator and does not require external feedback resistors. Pin 15 (FB/NC) is a no-connect for this variant, as confirmed in the Terminal Functions table and Functional Block Diagram for fixed-voltage versions. Adding external components to FB/NC may disrupt regulation or cause instability.
How does the power-good (PG) output behave during startup and fault conditions?
The PG output of the TPS76818QPWP is an open-drain, active-low signal that remains high-impedance until VO reaches ≥98% of 1.8 V, then pulls low only if VO drops below 92% (i.e., ≤1.656 V). It does not assert during startup ramp-up-it waits until regulation is established. During overcurrent or thermal shutdown, PG stays high unless VO collapses below threshold, providing unambiguous output health indication.
Can the TPS76818QPWP operate without a minimum load current?
Yes, the TPS76818QPWP is explicitly specified to operate stably with zero load current. Unlike many older LDOs, it imposes no minimum load requirement-enabling direct use in ultra-low-power sleep states, intermittent-sampling sensors, and systems with dynamically disabled downstream circuitry without risk of oscillation or regulation loss.
What thermal derating applies to the TPS76818QPWP in a standard 4-layer PCB layout?
On a 4-layer PCB with 4-in² copper heatsink (1 oz, 4 × 4 in), the TPS76818QPWP has a thermal resistance of 32.6°C/W (no airflow). At +70°C ambient, its maximum continuous power dissipation is 2.3 W; above that, junction temperature exceeds 125°C. Derating is linear: power limit decreases by 41.2 mW/°C above +25°C ambient-so at +85°C, max dissipation drops to 1.6 W.
TPS76818QPWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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:
- 20-HTSSOP
TPS76818QPWP FAQ
1.How can I place an order for TPS76818QPWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76818QPWP 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 TPS76818QPWP reliable?
The price and inventory of TPS76818QPWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76818QPWP is usually 5 days.
3.What payment methods are accepted for TPS76818QPWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76818QPWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76818QPWP?
TPS76818QPWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76818QPWP 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 TPS76818QPWP?
For technical support, including TPS76818QPWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76818QPWP requirements.
6.How does Aetrix verify that TPS76818QPWP is sourced from the original manufacturer or authorized distributors?
All TPS76818QPWP 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 TPS76818QPWP meets industry standards.
7.What is the process for return or replacement of TPS76818QPWP?
All TPS76818QPWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS76818QPWP, 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 TPS76818QPWP part is unused and in its original packaging.
Return procedure for TPS76818QPWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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