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Texas Instruments TPS76818QPWPRQ1
- Part No.:
- TPS76818QPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS76818QPWPRQ1.pdf
- Description:
- IC REG LINEAR 1.8V 1A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:888
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Product details
Overview
TPS76818QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 1-A low-dropout (LDO) voltage regulator with fixed 1.8-V output, 230-mV typical dropout at 1 A (TPS76850-Q1), 85-μA quiescent current, ±2% output tolerance over –40°C to 125°C, and open-drain power-good (PG) output - used for powering microcontrollers and sensors in engine control units.
For engineers reviewing the TPS76818QPWPRQ1 datasheet, TPS76818QPWPRQ1 pinout, TPS76818QPWPRQ1 application, or TPS76818QPWPRQ1 equivalent, this page delivers verified electrical specs, thermal metrics, automotive-grade reliability data, and real-world transient response behavior - critical for ADAS, powertrain, and cluster subsystem design.
Technical Context
The TPS76818QPWPRQ1 uses a PMOS pass element enabling ultralow, load-independent quiescent current (85 μA typ) and linear dropout voltage scaling (230 mV at 1 A for 5-V version; 350 mV at 1 A for 3.3-V version). Its fast-transient-response architecture stabilizes with only 10-μF output capacitance and supports 1-A continuous load across –40°C to 125°C ambient.
It integrates active-high PG monitoring with 92–98% VO trip threshold, thermal shutdown at 150°C, and current limiting at ~1.7 A. The enable (EN) input is TTL-compatible (low-enable, 0.9 V max logic-low threshold), and the device enters <1-μA standby when EN is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±2% over line, load, and temperature (–40°C to 125°C) |
| Max output current | 1 A continuous; internal current limit clamps at ~1.7 A |
| Dropout voltage | 350 mV typ at 1 A (for 3.3-V variant); 230 mV typ at 1 A (for 5-V variant); TPS76818-Q1 dropout is 380 mV max at 1 A, –40°C to 125°C |
| Quiescent current | 85 μA typ (0–1 A load, 25°C); ≤125 μA max (–40°C to 125°C) |
| Power-good (PG) | Open-drain output asserting high when VO ≥92% of nominal; hysteresis = 0.5% VO |
| Input voltage range | 2.7 V to 10 V; device shuts down if VI falls below 2.7 V |
| Thermal resistance | RθJA = 39.5°C/W (HTSSOP-20 PWP package) |
Pinout & Package
TPS76818QPWPRQ1 is housed in a thermally enhanced 20-pin HTSSOP (PWP) package measuring 6.50 mm × 4.40 mm, with an exposed thermal pad soldered to PCB ground for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 9–12, 19, 20 | GND/HSINK | Ground reference and thermal heatsink connection; must be soldered to large copper area |
| 3 | GND | Dedicated signal ground pin for internal regulation circuitry |
| 4, 8, 17, 18 | NC | No internal connection; left unconnected per datasheet |
| 5 | EN | Active-low enable input; logic-low ≤0.9 V enables regulator; logic-high ≥1.7 V disables (IQ < 1 μA) |
| 6, 7 | IN | Main input voltage pins; dual inputs reduce IR drop and improve current handling |
| 13, 14 | OUT | Regulated 1.8-V output; dual pins reduce trace resistance and improve current delivery |
| 15 | FB/NC | Feedback input for adjustable variants; no-connect (NC) for fixed-output TPS76818QPWPRQ1 |
| 16 | PG | Open-drain power-good output; requires external pullup; asserts high when VO ≥92% of 1.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to 125°C ambient), HBM ±2 kV, CDM ±500 V |
| Fast transient response | Stable with 10-μF ceramic output capacitor; optimized for rapid load steps in ECU subsystems |
| Low quiescent current | 85 μA typical across full 0–1 A load range - extends battery life in always-on vehicle modules |
| Thermal protection | Auto-shutdown at TJ ≈150°C; resumes operation after cooling to ~130°C |
| Reverse-current blocking | Integrated back-gate diode prevents reverse current flow from OUT to IN during power-down |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 32-bit MCU core and CAN transceiver in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 1.8-V LDO supplying digital logic rails with fast load-step immunity during injector firing sequences. Use Value: 350-mV max dropout at 1 A ensures stable regulation even as battery voltage sags to 6 V during cranking. |
Use Scenario: Supplies image signal processor (ISP) and radar sensor interface in forward collision warning modules. IC Role / Device Role / Timing Role: Low-noise 1.8-V source for high-speed ADC clock domains and SerDes PHYs. Use Value: 55-μVrms output noise and 60-dB PSRR at 1 kHz minimize timing jitter in pixel data capture. |
| Instrument Cluster Display | Body Control Module (BCM) |
Use Scenario: Delivers clean 1.8-V rail to TFT-LCD controller and touch-screen digitizer ASIC. IC Role / Device Role / Timing Role: Fixed-output LDO with PG signal used for display power sequencing and fault detection. Use Value: PG output provides hardware reset assertion when supply drops below 1.66 V (92% of 1.8 V), preventing GUI corruption. |
Use Scenario: Powers LIN transceiver and EEPROM in door module control units. IC Role / Device Role / Timing Role: Always-on LDO with ultra-low IQ supporting sleep-mode current budget <100 μA. Use Value: 85-μA quiescent current enables >1-year battery standby without drain - critical for keyless entry systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B6718QPWPRQ1 | Higher PSRR (70 dB @ 1 kHz), lower noise (25 μVrms), but 300-mA max output current | Targeted for analog sensor signal chains, not high-current digital loads | Select when noise/PSRR dominate over current capability; not suitable for 1-A MCU cores |
| TLV73318PDBVR | Lower IQ (25 μA), SOT-23-5 package, but only 300 mA output and no PG or AEC-Q100 rating | Designed for cost-sensitive consumer portables, not automotive safety-critical systems | Use only in non-automotive, low-power, space-constrained designs where PG and qualification are unnecessary |
Compared with TPS76818QPWPRQ1, TPS7B6718QPWPRQ1 trades output current for superior noise/PSRR performance, while TLV73318PDBVR sacrifices automotive qualification, PG, and current capability for ultra-low IQ and small footprint - making neither a drop-in replacement.
Availability
TPS76818QPWPRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS sensor fusion, and instrument cluster applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for TPS76818QPWPRQ1 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 automotive ICs, with decades of expertise in power management and functional-safety-compliant design.
The TPS768xx-Q1 family was engineered specifically for automotive subsystems demanding fast transient response, low quiescent current, and robust thermal/ESD performance under harsh operating conditions.
FAQ
What is the maximum input voltage for TPS76818QPWPRQ1?
The absolute maximum input voltage for TPS76818QPWPRQ1 is 13.5 V, but the recommended operating range is 2.7 V to 10 V. Operation above 10 V is not advised due to increased power dissipation and potential reliability impact. The device shuts down if input falls below 2.7 V, and TPS76818QPWPRQ1 maintains regulation only when VI ≥ VO + VDO, where VDO is up to 380 mV at full load and temperature extremes.
Does TPS76818QPWPRQ1 require an external feedback resistor network?
No, TPS76818QPWPRQ1 is a fixed-output 1.8-V regulator; its FB/NC pin (Pin 15) is internally connected and must remain unconnected on the PCB. Unlike the adjustable TPS76801-Q1, TPS76818QPWPRQ1 does not use external resistors to set output voltage - simplifying layout and eliminating resistor tolerance errors in the 1.8-V rail.
How does the power-good (PG) output behave on TPS76818QPWPRQ1?
The PG output on TPS76818QPWPRQ1 is an open-drain, active-high signal that transitions high when the regulated output reaches ≥92% of 1.8 V (≥1.656 V) and remains high until VO drops below 92% - with 0.5% VO hysteresis. It requires an external pullup resistor (typically 10–100 kΩ to 3.3/5 V) and is commonly used to drive reset logic or monitor supply health in ECUs.
Can TPS76818QPWPRQ1 operate with a 10-μF ceramic output capacitor?
Yes, TPS76818QPWPRQ1 is explicitly designed to be stable with a minimum 10-μF ceramic output capacitor having ESR between 50 mΩ and 1.5 Ω - enabling compact, low-ESR, high-reliability designs. This eliminates need for larger tantalum or aluminum electrolytics and supports fast transient response in automotive applications like fuel injection drivers.
What thermal derating applies to TPS76818QPWPRQ1 at 125°C ambient?
At TA = 125°C, TPS76818QPWPRQ1's maximum continuous output current is reduced due to thermal limits. With RθJA = 39.5°C/W and max TJ = 150°C, allowable power dissipation drops to ~0.63 W - limiting practical 1.8-V output current to ~350 mA when VI = 6 V. For full 1-A operation at high ambient, board-level thermal design (copper area, airflow) or lower VI is required to maintain TJ ≤125°C.
TPS76818QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS76818QPWPRQ1 FAQ
1.How can I place an order for TPS76818QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76818QPWPRQ1 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 TPS76818QPWPRQ1 reliable?
The price and inventory of TPS76818QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76818QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS76818QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76818QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76818QPWPRQ1?
TPS76818QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76818QPWPRQ1 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 TPS76818QPWPRQ1?
For technical support, including TPS76818QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76818QPWPRQ1 requirements.
6.How does Aetrix verify that TPS76818QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS76818QPWPRQ1 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 TPS76818QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS76818QPWPRQ1?
All TPS76818QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS76818QPWPRQ1, 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 TPS76818QPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS76818QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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