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Texas Instruments TPS77718PWPR
- Part No.:
- TPS77718PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS77718PWPR.pdf
- Description:
- IC REG LIN 1.8V 750MA 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
TPS77718PWPR from Texas Instruments is a 750-mA, 1.8-V fixed-output low-dropout (LDO) voltage regulator with open-drain power-on reset (RESET), 2% output tolerance over line/load/temperature, 260 mV typical dropout at 750 mA, and 85 µA typical quiescent current. It operates from −40°C to 125°C and is used in battery-powered microcontroller systems requiring precise, low-noise 1.8-V supply with undervoltage monitoring.
For engineers reviewing the TPS77718PWPR datasheet, TPS77718PWPR pinout, TPS77718PWPR application, or TPS77718PWPR equivalent, key selection considerations include its 20-pin HTSSOP PowerPAD™ package with thermal-sink pins, RESET timeout delay of 200 ms, PMOS pass element enabling load-independent quiescent current, and compatibility with 10 µF low-ESR output capacitors for fast transient response.
Technical Context
The TPS77718PWPR integrates a precision 1.1834-V internal reference and comparator to monitor regulated output voltage, asserting open-drain RESET when VO drops to 92–98% of nominal (1.656–1.764 V). Its PMOS pass transistor delivers ultralow, load-invariant quiescent current (85 µA typ, 125 µA max at 750 mA) and avoids saturation in dropout-critical for battery longevity and reliable startup under marginal input conditions.
Designed for stability with 10 µF ceramic or tantalum output capacitors (ESR 50 mΩ–1.5 Ω), it features thermal shutdown at 150°C, current limiting (~1.7 A), and enable-controlled shutdown reducing quiescent current to 1 µA. The 200-ms RESET delay is internally generated and independent of external components.
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); ensures stable core logic supply for 1.8-V ASICs/FPGAs. |
| Max Output Current | 750 mA continuous; supports moderate-power digital loads like microcontrollers, ADCs, and interface ICs without external boost. |
| Dropout Voltage | 260 mV typical at 750 mA; enables operation down to VIN = 2.06 V, extending usable battery range in single-cell Li-ion or dual-cell alkaline systems. |
| Quiescent Current | 85 µA typical (0–750 mA load); remains constant across load, maximizing battery life in always-on or low-duty-cycle applications. |
| RESET Threshold | 92–98% of VO (1.656–1.764 V); provides hysteresis to prevent chatter during brownout recovery; open-drain output requires external pullup. |
| RESET Delay | 200 ms fixed internal timeout; ensures clean system reset after power stabilization, eliminating need for external RC timing networks. |
| Thermal Protection | Shuts down at TJ ≈ 150°C; resumes operation at ≈130°C; protects against sustained overload or poor PCB heatsinking in compact layouts. |
Pinout & Package
TPS77718PWPR uses the 20-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™) and eight dedicated GND/HSINK pins (pins 1, 2, 9, 10, 11, 12, 19, 20) for enhanced thermal performance and low-impedance grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 9, 10, 11, 12, 19, 20 | GND/HSINK | Ground return and thermal heatsink connection; must be soldered to large copper pour for ≤23.5 mW/°C derating and 1.9 W max power dissipation at 70°C ambient. |
| 3 | GND | Primary regulator ground reference; connects to system ground plane with low-inductance path to minimize noise coupling. |
| 4, 8, 17, 18 | NC | No internal connection; left unconnected on PCB to avoid parasitic coupling or unintended shorts. |
| 5, 6 | OUT | Regulated 1.8-V output; requires ≥10 µF low-ESR capacitor (50 mΩ–1.5 Ω) between OUT and GND for loop stability and transient response. |
| 7 | FB/NC | No-connect for fixed-output TPS77718PWPR; left floating (not tied to OUT) to avoid feedback path disruption or instability. |
| 13, 14 | OUT | Second pair of output terminals; paralleled with pins 5/6 to reduce trace resistance and improve current sharing in high-current layouts. |
| 15 | FB/NC | No-connect (same as pin 7); unused in fixed-voltage configuration; must not be connected to any node. |
| 16 | RESET | Open-drain RESET output; sinks current when VO falls below threshold; requires external pullup resistor (e.g., 10 kΩ to 3.3 V) for active-low reset signaling. |
| 5, 6, 13, 14 | OUT | Four parallel output pins reduce IR drop and thermal stress; all must be routed with equal-length, low-impedance traces to load. |
| 6, 7 | IN | Input voltage supply (2.7–10 V); accepts 0.1 µF ceramic bypass capacitor near pin for improved high-frequency noise rejection. |
| 5 | EN | Enable input; TTL-compatible (VIH ≥ 1.7 V, VIL ≤ 0.9 V); drives regulator into 1 µA standby mode when pulled high. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables 85 µA load-independent quiescent current and eliminates base-drive saturation issues-critical for long battery life and robust startup under low VIN. |
| Integrated 200-ms RESET Timer | Eliminates external RC timing components; guarantees deterministic reset assertion after power stabilization, simplifying BOM and layout. |
| Stable with 10 µF Low-ESR Cap | Supports cost-effective ceramic or solid tantalum capacitors (no minimum ESR required), reducing solution size and improving transient response vs. larger electrolytics. |
| Thermal PowerPAD™ Package | 20-pin HTSSOP with 8 thermal-sink pins delivers 2.9 W power dissipation (0 CFM airflow), enabling higher current operation in space-constrained industrial designs. |
| Wide Operating Temperature | Specified from −40°C to 125°C junction temperature; qualified for automotive under-hood, industrial control, and outdoor embedded applications. |
Applications
| Microcontroller Power Sequencing | Portable Medical Sensors |
|---|---|
|
Use Scenario: Supplying 1.8-V core voltage to ARM Cortex-M microcontrollers during cold-start and brownout conditions. IC Role / Device Role / Timing Role: Primary LDO regulator with integrated RESET output providing power-on reset signal to MCU's nRESET pin. Use Value: 200-ms internal RESET delay ensures firmware initialization completes before peripherals are enabled, preventing bus contention or register corruption. |
Use Scenario: Powering ultra-low-power biosensor signal chains (e.g., ECG front-end, glucose ADC) in wearable patch monitors. IC Role / Device Role / Timing Role: Precision 1.8-V analog supply with <54 µVrms output noise and 60 dB PSRR at 1 kHz, minimizing sensor measurement error. Use Value: 85 µA quiescent current extends single-CR2032 battery life beyond 12 months in sleep-dominated duty cycles. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
|
Use Scenario: Regulating 1.8-V supply for isolated CAN transceivers and digital isolators in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Robust LDO with thermal shutdown (150°C) and current limit (~1.7 A) protecting against field-wiring faults and shorted outputs. Use Value: −40°C to 125°C operating range and 2% output tolerance ensure reliable operation in uncontrolled cabinet environments. |
Use Scenario: Providing 1.8-V supply to infotainment SoC I/O banks and memory interfaces in vehicle body domain controllers. IC Role / Device Role / Timing Role: Fixed-output LDO with RESET monitoring output voltage to trigger diagnostic fault logging before system lockup. Use Value: Open-drain RESET output interfaces directly with automotive-grade microcontroller reset supervisors without level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS77718D | Same electrical specs but in 8-pin SOIC (D) package; no thermal pad; 568 mW max power dissipation (0 CFM). | Limited to lower-current or better-ventilated applications; unsuitable for >300 mA continuous in sealed enclosures. | Select TPS77718D only when board space is constrained and thermal budget allows SOIC-level dissipation. |
| TLV70718PDQNR | Lower IQ (25 µA), smaller 5-pin SOT-23 package, but only 300 mA output and no RESET function. | Cannot replace TPS77718PWPR where RESET supervision or >300 mA load current is required. | Choose TLV70718PDQNR for ultra-low-power, space-limited apps without reset monitoring needs. |
Compared with TPS77718D and TLV70718PDQNR, the TPS77718PWPR uniquely combines 750 mA output, integrated 200-ms RESET, and 2.9 W thermal capability in a surface-mount package-making it optimal for thermally demanding, safety-critical 1.8-V regulation tasks.
Availability
TPS77718PWPR is available at Aetrix Electronics and suitable for industrial PLC modules, portable medical sensors, and automotive body control units requiring stable component supply, extended temperature operation, and integrated power-good supervision.
Supply support for TPS77718PWPR 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, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.
The TPS777xx family was engineered for high-reliability, battery-sensitive applications requiring precise fixed-voltage regulation, ultralow quiescent current, and integrated power-monitoring functions-especially where thermal constraints limit SOIC-based solutions.
FAQ
What is the minimum input voltage required for TPS77718PWPR to maintain regulation?
The minimum input voltage for TPS77718PWPR is determined by its dropout voltage: VIN(min) = VOUT + VDO. At 750 mA and 25°C, VDO is 260 mV, so VIN must be ≥2.06 V. Per datasheet Section 6, the absolute minimum VIN is 2.7 V unless VOUT + VDO is greater-so 2.06 V applies only when VDO dominates. Always verify using the "Input Voltage (Min) vs Output Voltage" curve (Figure 14) for your specific load and temperature.
Does TPS77718PWPR require an external pullup resistor on the RESET pin?
Yes, TPS77718PWPR features an open-drain RESET output and requires an external pullup resistor to a valid logic-high voltage (e.g., 3.3 V or 5 V). Typical values range from 4.7 kΩ to 10 kΩ. Leaving RESET floating is acceptable if unused, but connecting it without pullup will prevent proper reset signaling to downstream logic.
Can TPS77718PWPR operate without an output capacitor?
No. TPS77718PWPR requires a minimum 10 µF output capacitor with ESR between 50 mΩ and 1.5 Ω for internal loop stability. Omitting it causes oscillation and output voltage collapse. Ceramic, tantalum, or aluminum electrolytic types are acceptable if they meet ESR and capacitance specs-verified in Figures 21–24 of the datasheet.
What is the thermal performance difference between TPS77718PWPR and TPS77718D?
TPS77718PWPR (20-pin HTSSOP PowerPAD™) delivers up to 2.9 W power dissipation at 25°C ambient (0 CFM), while TPS77718D (8-pin SOIC) is limited to 568 mW. This 5× improvement stems from eight dedicated thermal-sink pins and the exposed copper pad, enabling TPS77718PWPR to sustain 750 mA continuously in compact, sealed enclosures where TPS77718D would thermally throttle.
Is the FB/NC pin on TPS77718PWPR connected internally or should it be left floating?
For TPS77718PWPR-a fixed-output variant-the FB/NC pins (7 and 15) are No Connect and must remain unconnected. They are not internally tied to OUT or grounded. Connecting them risks feedback loop disruption, instability, or damage. Datasheet Terminal Functions table explicitly states "no connect for fixed options."
TPS77718PWPR 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:
- 750mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable, Power Good, Reset
- 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
TPS77718PWPR FAQ
1.How can I place an order for TPS77718PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77718PWPR 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 TPS77718PWPR reliable?
The price and inventory of TPS77718PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77718PWPR is usually 5 days.
3.What payment methods are accepted for TPS77718PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77718PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77718PWPR?
TPS77718PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77718PWPR 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 TPS77718PWPR?
For technical support, including TPS77718PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77718PWPR requirements.
6.How does Aetrix verify that TPS77718PWPR is sourced from the original manufacturer or authorized distributors?
All TPS77718PWPR 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 TPS77718PWPR meets industry standards.
7.What is the process for return or replacement of TPS77718PWPR?
All TPS77718PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS77718PWPR, 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 TPS77718PWPR part is unused and in its original packaging.
Return procedure for TPS77718PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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