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Texas Instruments TPS7A0318PDQNRM3
- Part No.:
- TPS7A0318PDQNRM3
- Manufacturer:
- Texas Instruments
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
TPS7A0318PDQNRM3.pdf
- Description:
- NANOPOWER-IQ 200NA 200MA LOW-DRO
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TPS7A0318PDQNRM3 from Texas Instruments is an ultra-low-quiescent-current (200nA typ) 200mA LDO voltage regulator in a 1.0mm × 1.0mm X2SON-4 package, delivering fixed 1.8V output with ±1.5% accuracy over –40°C to +125°C. It features fast transient response (<10µs settling), 270mV max dropout at 200mA, and smart enable with internal pulldown - optimized for battery-powered wearables and medical sensors.
For engineers reviewing the TPS7A0318PDQNRM3 datasheet, TPS7A0318PDQNRM3 pinout, TPS7A0318PDQNRM3 application, or TPS7A0318PDQNRM3 equivalent, key selection criteria include ultra-low IQ in dropout, 1µF minimum stable output capacitance, EN pin logic thresholds (VEN(HI) = 1.1V, VEN(LOW) = 0.3V), and thermal performance (RθJA = 179.1°C/W) in the DQN package.
Technical Context
The TPS7A0318PDQNRM3 implements a PMOS pass transistor architecture enabling ultra-low IQ operation even in dropout, with ground current rising only marginally across 0–200mA load. Its smart enable circuit integrates a temperature- and VOUT-dependent pulldown resistor (~500kΩ at VEN = 0.3V) that automatically disables the regulator when EN floats, eliminating external pull-down components.
Transient response is optimized via internal compensation and low-output-impedance design: step-load changes from 1mA to 50mA induce <80mV undershoot and settle within <10µs with a 1µF ceramic output capacitor. UVLO (1.23–1.47V rising threshold) and thermal shutdown (170°C trip, 145°C reset) provide robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 200nA typical - enables >10-year battery life in always-on IoT sensors drawing µA average current. |
| Shutdown Current | 3nA typical - extends shelf life of sealed medical devices during long-term storage. |
| Output Voltage | Fixed 1.8V ±1.5% over –40°C to +125°C - matches core voltage requirements of ultra-low-power MCUs like MSP430FRxx and nRF52833. |
| Max Output Current | 200mA - supports peak loads of BLE transceivers, optical pulse oximeter LEDs, or low-power ADCs without dropout. |
| Dropout Voltage | 270mV max at 200mA (VOUT = 3.3V); for 1.8V output, ≤310mV at 200mA - allows operation from single-cell LiFePO₄ (2.0–3.6V) or two alkaline cells (2.4–3.2V). |
| Stability | Stable with ≥1µF ceramic COUT - eliminates need for large tantalum or electrolytic capacitors, reducing board area and cost. |
| Transient Response | <10µs settling time, <80mV undershoot for 1mA→50mA load steps - maintains clean supply during RF transmit bursts or sensor sampling. |
Pinout & Package
TPS7A0318PDQNRM3 uses the DQN package: 1.0mm × 1.0mm, 4-pin X2SON with exposed thermal pad internally connected to GND. The compact footprint suits space-constrained wearables and implantables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.8V; requires ≥1µF ceramic capacitor placed adjacent to pin for stability and transient performance. |
| 2 - GND | Ground reference | Common return path; thermal pad must be soldered to large PCB ground plane for RθJB = 116.3°C/W thermal performance. |
| 3 - EN | Enable control input | Logic-high ≥1.1V enables regulator; floating or ≤0.3V disables it; internal pulldown eliminates external resistor. |
| 4 - IN | Input supply | Accepts 1.5–6.0V; requires ≥1µF ceramic capacitor close to pin to minimize input impedance and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ in dropout | Maintains 200nA quiescent current even when VIN drops near VOUT, maximizing usable battery capacity in deep-discharge scenarios. |
| Smart enable pulldown | Internally disconnects ~500kΩ pulldown when EN is driven high, preventing unintended current draw through external circuits during active operation. |
| Fast transient response | Sub-10µs recovery from 1mA→50mA load steps ensures stable MCU core voltage during burst-mode wireless communication. |
| UVLO with hysteresis | 180mV hysteresis between 1.23V (rising) and 1.0V (falling) thresholds prevents oscillation during weak-battery brownout conditions. |
| Thermal shutdown protection | 170°C trip with 25°C hysteresis (145°C reset) safeguards against sustained overload or poor PCB heatsinking in sealed enclosures. |
Applications
| Wearable Health Monitors | Smart Utility Meters |
|---|---|
Use Scenario: Continuous ECG/PPG sensing in wrist-worn patches powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary 1.8V power rail for ultra-low-power MCU and analog front-end. Use Value: 200nA IQ extends battery life beyond 2 years; fast transient response prevents data loss during motion-induced signal bursts. | Use Scenario: Battery-backed real-time clock and metrology IC in gas/water meters operating for 10+ years. IC Role / Device Role / Timing Role: Always-on 1.8V supply for RTC, memory backup, and low-power wake-up circuitry. Use Value: 3nA shutdown current preserves battery shelf life; ±1.5% output accuracy ensures precise timekeeping across temperature. |
| Residential Circuit Protection | Portable Medical Diagnostics |
Use Scenario: Fault detection and reporting in AFCI/GFCI breakers using energy-harvested or primary lithium cells. IC Role / Device Role / Timing Role: Regulated 1.8V source for microcontroller and isolated communication interface. Use Value: Operates down to 1.5V input, enabling use with partially discharged LiSOCl₂ cells; UVLO prevents erratic behavior during brownout. | Use Scenario: Handheld blood glucose meters with LCD display and electrochemical sensor readout. IC Role / Device Role / Timing Role: Precision 1.8V supply for ADC reference and sensor biasing circuitry. Use Value: 1.5% output accuracy over temperature ensures consistent glucose measurement; 1µF stability enables miniaturized PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0218PDQNR | Same 1.8V fixed output, but 25nA IQ (lower), 100mA max output, and DQN-4 package - not rated for 200mA loads. | Suitable for sub-100mA sensor nodes where lower IQ outweighs current capability. | Select TPS7A0218PDQNR only if load never exceeds 100mA and 175nA lower IQ justifies reduced drive strength. |
| MCP1700T-1802E/MB | 1.8V fixed, 1.6µA IQ (higher), SOT-23-3 package, 250mA max - lacks EN pin and smart pulldown, requiring external enable logic. | Fits cost-sensitive industrial controls where EN functionality is unnecessary and higher IQ is acceptable. | Choose MCP1700T-1802E/MB only when board space permits SOT-23-3 and system design includes discrete enable control. |
Compared with TPS7A0318PDQNRM3, TPS7A0218PDQNR offers lower IQ but sacrifices 100mA output headroom, while MCP1700T-1802E/MB provides higher current and lower cost but adds external component overhead and degrades battery runtime by 8× due to higher quiescent current.
Availability
TPS7A0318PDQNRM3 is available at Aetrix Electronics and suitable for wearable electronics, utility metering, residential circuit protection, and portable medical diagnostics requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS7A0318PDQNRM3 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 for mission-critical power management.
The TPS7A03 family targets ultra-low-power battery-operated systems - engineered to maximize energy efficiency in wearables, medical sensors, and smart infrastructure where every nanoampere impacts product lifetime.
FAQ
What is the maximum input voltage rating for the TPS7A0318PDQNRM3?
The TPS7A0318PDQNRM3 has an absolute maximum input voltage of 6.5V, but its recommended operating range is 1.5V to 6.0V. Exceeding 6.0V may trigger internal UVLO or reduce reliability; operation above 6.5V risks permanent damage per the Absolute Maximum Ratings table.
Does the TPS7A0318PDQNRM3 require an external pull-down resistor on the EN pin?
No, the TPS7A0318PDQNRM3 integrates a smart enable pulldown resistor (~500kΩ at 25°C) that automatically disables the device when EN is left floating. Adding an external resistor is unnecessary and may increase leakage current during active operation.
Can the TPS7A0318PDQNRM3 operate stably with a 0.5µF output capacitor?
A 0.5µF effective output capacitance meets the minimum stability requirement for the TPS7A0318PDQNRM3, but the datasheet specifies 1µF or larger for optimal transient response. Using only 0.5µF may increase undershoot and settling time during load steps beyond specification limits.
What is the thermal resistance (RθJA) of the TPS7A0318PDQNRM3 in its DQN package?
The TPS7A0318PDQNRM3 in the DQN (X2SON-4) package has a junction-to-ambient thermal resistance of 179.1°C/W under standard JEDEC test conditions. Actual thermal performance improves significantly with proper PCB copper pour connected to the thermal pad.
How does the TPS7A0318PDQNRM3 behave during input voltage dropout?
During dropout, the TPS7A0318PDQNRM3 maintains ultra-low 220nA ground current (typical) while continuing regulation until VIN falls below VOUT × 0.95. This preserves battery energy longer than conventional LDOs, which typically exhibit sharp IQ rise in dropout.
TPS7A0318PDQNRM3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 300 nA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-X2SON (1x1)
TPS7A0318PDQNRM3 FAQ
1.How can I place an order for TPS7A0318PDQNRM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A0318PDQNRM3 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 TPS7A0318PDQNRM3 reliable?
The price and inventory of TPS7A0318PDQNRM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A0318PDQNRM3 is usually 5 days.
3.What payment methods are accepted for TPS7A0318PDQNRM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A0318PDQNRM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A0318PDQNRM3?
TPS7A0318PDQNRM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A0318PDQNRM3 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 TPS7A0318PDQNRM3?
For technical support, including TPS7A0318PDQNRM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A0318PDQNRM3 requirements.
6.How does Aetrix verify that TPS7A0318PDQNRM3 is sourced from the original manufacturer or authorized distributors?
All TPS7A0318PDQNRM3 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 TPS7A0318PDQNRM3 meets industry standards.
7.What is the process for return or replacement of TPS7A0318PDQNRM3?
All TPS7A0318PDQNRM3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A0318PDQNRM3, 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 TPS7A0318PDQNRM3 part is unused and in its original packaging.
Return procedure for TPS7A0318PDQNRM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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