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Texas Instruments TPS76718QD
- Part No.:
- TPS76718QD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS76718QD.pdf
- Description:
- IC REG LINEAR 1.8V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:318
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Product details
Overview
TPS76718QD from Texas Instruments is a 1.8-V fixed-output, 1-A low-dropout linear regulator with PMOS pass element, 230-mV dropout at 1 A (typ), 85-µA quiescent current, and integrated open-drain power-on reset with 200-ms delay-designed for battery-powered microcontroller supply rails in portable instrumentation.
For engineers reviewing the TPS76718QD datasheet, TPS76718QD pinout, TPS76718QD application, or TPS76718QD equivalent, key selection criteria include dropout voltage stability across −40°C to 125°C, RESET assertion threshold (92–98% VO), thermal shutdown at 150°C, and compatibility with 10-µF low-ESR output capacitors.
Technical Context
The TPS76718QD uses a voltage-driven PMOS pass transistor to achieve load-independent quiescent current (85 µA typ) and low dropout (350 mV max at 1 A, −40°C to 125°C). Its internal 1.1834-V reference and error amplifier enable ±2% output voltage accuracy over line, load, and temperature.
It integrates an undervoltage-monitoring comparator that asserts the open-drain RESET output when VO drops below 92% of nominal (1.656 V), with 0.5-V hysteresis and 200-ms timeout delay. Thermal shutdown activates at TJ = 150°C and recovers at ~130°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2% over −40°C to 125°C, 2.8 V ≤ VIN ≤ 10 V - ensures stable core logic supply for 1.8-V microcontrollers. |
| Dropout Voltage | 350 mV max at 1 A, −40°C to 125°C - enables regulation down to VIN = 2.15 V, critical for Li-ion battery discharge tail. |
| Quiescent Current | 85 µA typ (0–1 A load), 125 µA max - extends battery life in always-on sensor nodes without sacrificing transient response. |
| RESET Threshold | 92–98% VO (1.656–1.764 V), 200-ms delay - provides clean, debounced reset signal for MCU boot integrity. |
| Thermal Shutdown | 150°C trip, ~130°C recovery - protects against sustained overload or poor PCB heatsinking in compact enclosures. |
| PSRR | 60 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 55 µVRMS (10 Hz–100 kHz, 10 µF capacitor) - supports noise-sensitive analog peripherals like ADCs or RF front-ends. |
Pinout & Package
TPS76718QD is housed in an 8-pin SOIC (D) package (4.90 mm × 3.91 mm), optimized for thermal performance with GND as primary heat path. The exposed pad variant is not used in this SOIC version.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Regulator ground reference and primary return path for load and quiescent current. |
| 2 | EN | Active-low enable input; TTL-compatible (VIH ≥ 1.7 V, VIL ≤ 0.9 V); pulls quiescent current to 1 µA when high. |
| 3, 4 | IN | Dual-input pins reduce trace inductance and IR drop; accept 2.8–10 V input with 0.3-V absolute max rating margin. |
| 5, 6 | OUT | Dual-output pins lower impedance and improve transient response; deliver regulated 1.8 V up to 1 A. |
| 7 | FB/NC | No-connect for fixed-output TPS76718QD; reserved for feedback loop in adjustable TPS76701 variant. |
| 8 | RESET | Open-drain output; sinks 300 µA at valid VO, requires external pullup for MCU reset assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Stable with only 10 µF low-ESR output capacitor (50 mΩ–1.5 Ω), enabling rapid load step recovery in digital SoC supplies. |
| Ultralow quiescent current | 85 µA typical across full 0–1 A load range - eliminates efficiency penalty at light loads common in IoT sleep modes. |
| Integrated power-on reset | 200-ms delay with 92–98% VO threshold - replaces discrete reset ICs and reduces BOM count in space-constrained designs. |
| Thermal and current protection | 150°C shutdown + 1.7-A current limit - prevents catastrophic failure during short-circuit or ambient overheating events. |
| Zero-load stability | No minimum load required - simplifies design for intermittent-sensing applications where output may be unloaded for seconds. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
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 core supply for ARM Cortex-M0+ MCU and 16-bit sigma-delta ADC. Use Value: 350-mV dropout sustains regulation until battery reaches 2.15 V; 55-µV RMS noise avoids ADC quantization errors. |
Use Scenario: DIN-rail mounted remote I/O node with isolated CAN interface and 24-V DC input. IC Role / Device Role / Timing Role: Local 1.8-V rail for FPGA configuration memory and low-voltage logic buffers. Use Value: RESET output synchronizes FPGA reconfiguration on brownout; 60-dB PSRR rejects 1-MHz DC/DC ripple. |
| Automotive Body Control Units | Test & Measurement Handhelds |
|
Use Scenario: Door module with LIN transceiver, LED drivers, and wake-on-LIN capability. IC Role / Device Role / Timing Role: Always-on 1.8-V supply for LIN PHY and microcontroller RTC domain. Use Value: 85-µA quiescent current meets ISO 11898-3 standby leakage limits; EN pin enables deep-sleep mode. |
Use Scenario: Battery-powered oscilloscope with 12-bit ADC and color LCD display. IC Role / Device Role / Timing Role: Clean 1.8-V supply for ADC reference buffer and display controller core. Use Value: 2% output tolerance ensures measurement repeatability; thermal shutdown prevents damage during bench testing overload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76718QDR | Same silicon, tape-and-reel packaging (SOIC-D, R-suffix); identical electrical specs and pinout. | No functional difference; selected for automated SMT assembly instead of tube packaging. | Choose TPS76718QDR for volume production; TPS76718QD for prototyping or low-volume builds. |
| TLV70718 | Lower IQ (25 µA), smaller 5-pin SOT-23 package, but 0.5-A max output and no RESET output. | Suitable for space-constrained, sub-500-mA applications where reset supervision is handled externally. | Select TLV70718 only if output current ≤ 0.5 A and RESET functionality is redundant or implemented elsewhere. |
Compared with TPS76718QD, TPS76718QDR offers identical performance in tape-and-reel form for production lines, while TLV70718 trades RESET and 1-A capability for ultra-low IQ and footprint-making it viable only in lower-current, reset-free designs.
Availability
TPS76718QD is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and test & measurement handhelds requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS76718QD 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The TPS767xx family was designed specifically for high-reliability, battery-sensitive applications demanding fast transient response, ultralow quiescent current, and integrated power-good monitoring in compact packages.
FAQ
What is the minimum input voltage required for TPS76718QD to maintain regulation?
The TPS76718QD requires VIN ≥ VO + VDO. At 1 A and 25°C, VDO is 350 mV max, so minimum VIN is 2.15 V. Over temperature (−40°C to 125°C), VDO rises to 825 mV for TPS76728Q-but for TPS76718QD, the datasheet specifies 350 mV max at 1 A across full temperature range. Thus, TPS76718QD maintains regulation down to 2.15 V input under worst-case conditions.
Does TPS76718QD require an external pull-up resistor on the RESET pin?
Yes, TPS76718QD features an open-drain RESET output and requires an external pull-up resistor (typically 10–100 kΩ to VO or system VCC) to assert a logic-high reset signal when active. Without the pull-up, RESET remains floating and cannot drive an MCU reset input reliably. This is explicitly required per the TPS76718QD functional description.
Can TPS76718QD operate without an output capacitor?
No. TPS76718QD requires a minimum 10-µF output capacitor with ESR between 50 mΩ and 1.5 Ω for loop stability. Omitting it causes oscillation or unregulated output. Ceramic, tantalum, or aluminum electrolytic types meeting those ESR criteria are acceptable - solid tantalum is commonly used for reliability in industrial environments.
What is the thermal resistance (RθJA) of the TPS76718QD SOIC package?
The TPS76718QD in the 8-pin SOIC (D) package has a junction-to-ambient thermal resistance (RθJA) of 106.9°C/W, as specified in the Thermal Information table. This value assumes standard JEDEC 2S2P board layout; actual performance improves with copper pour and thermal vias under the GND pins.
Is TPS76718QD pin-compatible with other devices in the TPS767xx family?
Yes, all fixed-output TPS767xxQ variants-including TPS76715Q, TPS76718QD, TPS76725Q, and TPS76733Q-share identical 8-pin SOIC (D) pinout and package dimensions. Output voltage is the only functional difference; no PCB redesign is needed when upgrading or downgrading within the family.
TPS76718QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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, Reset
- 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
TPS76718QD FAQ
1.How can I place an order for TPS76718QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76718QD 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 TPS76718QD reliable?
The price and inventory of TPS76718QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76718QD is usually 5 days.
3.What payment methods are accepted for TPS76718QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76718QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76718QD?
TPS76718QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76718QD 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 TPS76718QD?
For technical support, including TPS76718QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76718QD requirements.
6.How does Aetrix verify that TPS76718QD is sourced from the original manufacturer or authorized distributors?
All TPS76718QD 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 TPS76718QD meets industry standards.
7.What is the process for return or replacement of TPS76718QD?
All TPS76718QD units undergo pre-shipment inspection (PSI). If there is an issue with TPS76718QD, 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 TPS76718QD part is unused and in its original packaging.
Return procedure for TPS76718QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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