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Texas Instruments TPS7A0312DQNR
- Part No.:
- TPS7A0312DQNR
- Manufacturer:
- Texas Instruments
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
TPS7A0312DQNR.pdf
- Description:
- 200-MA, NANOPOWER-IQ (200 NA), L
- Quantity:
- Payment:
- Shipping:
Inventory:2,750
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Product details
Overview
TPS7A0312DQNR from Texas Instruments is an ultra-low-quiescent-current LDO voltage regulator delivering 200mA output with 200nA typical IQ, 1.2V fixed output, and 270mV max dropout at 200mA - designed for battery-powered wearables and medical sensors requiring multi-year shelf life and fast transient response.
For engineers reviewing the TPS7A0312DQNR datasheet, TPS7A0312DQNR pinout, TPS7A0312DQNR application, or TPS7A0312DQNR equivalent, key selection criteria include nanopower shutdown current (3nA), smart enable pulldown (500kΩ internal resistor), ±1.5% output accuracy over –40°C to +125°C, and stability with ≥1µF ceramic output capacitance.
Technical Context
The TPS7A0312DQNR implements a PMOS pass transistor architecture enabling ultra-low IQ in dropout mode and precise line/load regulation. Its smart enable circuit integrates a temperature-compensated internal pulldown resistor (500kΩ at 25°C) that ensures reliable disable state without external components while minimizing leakage during active operation.
Transient performance is optimized via internal compensation and low-output-impedance design: load steps from 1mA to 50mA settle in <10µs with only 80mV undershoot, and it maintains PSRR >55dB at 1kHz across 0–200mA load range - critical for noise-sensitive analog and RF subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 200nA typical - enables >10-year battery life in always-on IoT sensors with 220mAh coin cells. |
| Shutdown Current | 3nA typical - extends shelf life of medical disposables and metering devices during storage. |
| Output Voltage | Fixed 1.2V ±1.5% - matches core voltage requirements of ultra-low-power MCUs like MSP430FR and nRF52833. |
| Max Dropout | 270mV at 200mA - supports operation down to 1.47V input, enabling single-cell LiFePO₄ or two-cell alkaline supply use. |
| 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 (1mA→50mA) - prevents brownout in real-time pulse oximeter ADC sampling. |
| Operating Temp | –40°C to +125°C junction - qualified for residential circuit breakers and building security hardware deployed in uncontrolled environments. |
Pinout & Package
TPS7A0312DQNR uses the DQN package: 1.0mm × 1.0mm, 4-pin X2SON with exposed thermal pad connected internally to GND. This ultra-compact footprint targets space-constrained wearables and implantable-grade diagnostics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.2V; requires ≥1µF ceramic capacitor placed adjacent to pin for transient immunity and stability. |
| 2 - GND | Ground reference | Common return path; thermal pad must be soldered to large PCB ground plane for thermal dissipation and noise reduction. |
| 3 - EN | Enable control input | Logic-high (>1.1V) enables regulation; internal 500kΩ pulldown holds device disabled if left floating - no external pull-down needed. |
| 4 - IN | Input supply | Accepts 1.5V–6.0V; requires ≥1µF ceramic capacitor near pin to minimize input impedance and suppress supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ in dropout | Maintains 200nA quiescent current even when VIN drops below VOUT + VDO - maximizes usable battery capacity in deep-discharge scenarios. |
| Smart enable pulldown | Internally disconnects 500kΩ pulldown resistor when EN is driven high - eliminates wasted current through external bias networks. |
| Fast transient response | Sub-10µs recovery from 1mA→50mA load step with minimal undershoot - preserves signal integrity in burst-mode sensor acquisition. |
| Wide input range | 1.5V–6.0V operation supports diverse primary/secondary chemistries including Li-SOCl₂, Li-MnO₂, and 2×AA/AAA configurations. |
| High accuracy over temp | ±1.5% output tolerance from –40°C to +125°C - eliminates need for system-level calibration in thermostats and smoke detectors. |
Applications
| Wearable Health Monitors | Smart Utility Meters |
|---|---|
Use Scenario: Continuous ECG and SpO₂ monitoring in wrist-worn patches powered by CR2032 batteries. IC Role / Device Role / Timing Role: Primary power rail regulator supplying 1.2V to ultra-low-power MCU and analog front-end. Use Value: 200nA IQ extends operational life beyond 2 years; fast transient response prevents data loss during motion-induced sensor excitation. | Use Scenario: Battery-backed gas/water meter with 10-year deployment requirement and periodic RF transmission. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock, metrology ASIC, and LoRaWAN transceiver sleep circuitry. Use Value: 3nA shutdown current preserves >95% of battery capacity during 99.9% idle time; UVLO hysteresis prevents oscillation near end-of-life voltage. |
| Residential Circuit Protection | Point-of-Sale Security Terminals |
Use Scenario: Arc-fault detection module mounted inside consumer breaker panels with no external power source. IC Role / Device Role / Timing Role: Regulator for fault-interrupt controller and isolated gate driver, operating from harvested energy or backup capacitor. Use Value: 1.47V UVLO threshold ensures clean startup from weak input sources; thermal shutdown (170°C) protects against enclosure overheating. | Use Scenario: Contactless payment terminal with tamper-evident secure element requiring certified voltage rails. IC Role / Device Role / Timing Role: Certified 1.2V supply for cryptographic co-processor and NFC controller during transaction handshaking. Use Value: ±1.5% output accuracy meets EMVCo Level 1 power integrity requirements; PSRR >55dB at 1kHz suppresses switching noise from display DC-DC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0212PDBVR | Same 1.2V output, but 25nA IQ (lower), 100mA output current (reduced), SOT-23-5 package (larger). | Better suited for sub-100mA applications where IQ is paramount and board space allows SOT-23. | Select when ultra-deep sleep dominates duty cycle and full 200mA peak is unnecessary. |
| MCP1700T-1202E/TT | 1.2V fixed, 1.6µA IQ (higher), 250mA output, SOT-23-3 (no EN pin), no smart pulldown. | Requires external enable logic and pull-down; less suitable for floating-EN designs or strict <1µA standby budgets. | Choose for cost-sensitive, non-floating-EN applications where 1.6µA IQ is acceptable and 3-pin simplicity is preferred. |
Compared with TPS7A0312DQNR, TPS7A0212PDBVR trades 100mA output headroom for 8× lower IQ, while MCP1700T-1202E/TT offers higher current but lacks integrated enable control and adds ~8× quiescent overhead - making TPS7A0312DQNR optimal for space-constrained, floating-EN, nanopower systems demanding full 200mA capability.
Availability
TPS7A0312DQNR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, residential circuit protection modules, and point-of-sale security terminals requiring stable component supply across long-lifecycle industrial programs.
Supply support for TPS7A0312DQNR 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 heritage and automotive/industrial qualification rigor.
The TPS7A03 family was engineered specifically for battery-operated edge nodes needing decade-scale shelf life, ultra-fast transient immunity, and minimal bill-of-materials - targeting medical, metering, and building automation markets.
FAQ
What is the maximum input voltage rating for TPS7A0312DQNR?
The absolute maximum input voltage for TPS7A0312DQNR is 6.5V, but the recommended operating range is 1.5V to 6.0V. Exceeding 6.5V risks permanent damage. For reliable long-term operation, maintain VIN ≤6.0V and ensure proper derating under high-temperature conditions per TI's thermal metrics.
Does TPS7A0312DQNR require an external pull-down resistor on the EN pin?
No, TPS7A0312DQNR does not require an external pull-down resistor on the EN pin. It features an integrated smart enable pulldown with a 500kΩ resistor (at 25°C) that automatically disconnects when EN is driven high - ensuring robust disable behavior with zero external components.
What output capacitor value is required for stability with TPS7A0312DQNR?
TPS7A0312DQNR is stable with a minimum 0.5µF effective output capacitance, but a 1µF or larger ceramic capacitor is required for optimal transient response and guaranteed stability across temperature and process variation. X7R or X5R dielectrics are recommended.
How does TPS7A0312DQNR perform during fast load transients?
TPS7A0312DQNR achieves <10µs settling time with only 80mV undershoot for 1mA-to-50mA load steps, verified across –40°C to +125°C. This performance is enabled by internal compensation and low-impedance PMOS pass element - critical for preserving ADC accuracy in pulse oximeters and gas sensors.
Is TPS7A0312DQNR qualified for automotive applications?
TPS7A0312DQNR is not AEC-Q100 qualified and is specified for industrial temperature range (–40°C to +125°C), not automotive. It is intended for residential, commercial, and medical applications - not under-hood automotive systems. For automotive use, consider TI's TPS7B8x-Q1 series.
TPS7A0312DQNR 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.79V @ 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)
TPS7A0312DQNR FAQ
1.How can I place an order for TPS7A0312DQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A0312DQNR 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 TPS7A0312DQNR reliable?
The price and inventory of TPS7A0312DQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A0312DQNR is usually 5 days.
3.What payment methods are accepted for TPS7A0312DQNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A0312DQNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A0312DQNR?
TPS7A0312DQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A0312DQNR 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 TPS7A0312DQNR?
For technical support, including TPS7A0312DQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A0312DQNR requirements.
6.How does Aetrix verify that TPS7A0312DQNR is sourced from the original manufacturer or authorized distributors?
All TPS7A0312DQNR 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 TPS7A0312DQNR meets industry standards.
7.What is the process for return or replacement of TPS7A0312DQNR?
All TPS7A0312DQNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A0312DQNR, 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 TPS7A0312DQNR part is unused and in its original packaging.
Return procedure for TPS7A0312DQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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