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Texas Instruments TPS7A0518PDBVR
- Part No.:
- TPS7A0518PDBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS7A0518PDBVR.pdf
- Description:
- IC REG LINEAR 1.8V 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,263
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Product details
Overview
TPS7A0518PDBVR from Texas Instruments is a 1.8-V fixed-output, 200-mA ultralow-quiescent-current LDO regulator in a 5-pin SOT-23 package. It delivers 1% typical output accuracy, 235 mV max dropout at 200 mA, and consumes only 1 µA typical ground current - enabling multi-year battery life in always-on wearable and IoT sensors powered by Li-MnO₂ or two-cell alkaline batteries.
For engineers reviewing the TPS7A0518PDBVR datasheet, TPS7A0518PDBVR pinout, TPS7A0518PDBVR application, or TPS7A0518PDBVR equivalent, this page provides verified electrical specs, validated SOT-23 (DBV) pin functions, real-world use cases in ultra-low-power systems, and two technically documented alternative parts with explicit functional and packaging differences.
Technical Context
The TPS7A0518PDBVR uses a PMOS pass transistor architecture to achieve ultralow IQ and fast transient response without requiring external compensation. Its internal foldback current limit and thermal shutdown (160°C trip) provide robust fault protection during overload or ambient temperature excursions.
It integrates an active pulldown circuit for rapid output discharge when disabled and supports operation across –40°C to +125°C junction temperature. The device is stable with ≥0.47-µF ceramic output capacitance and requires no minimum load current to maintain regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% (typ), ±3% (max) - ensures precise core voltage for low-power MCUs and sensors. |
| Max Output Current | 200 mA - sufficient to power BLE SoCs, NFC tags, and sub-GHz RF transceivers. |
| Quiescent Current | 1 µA (typ), 3 µA (max) - extends shelf life and runtime in energy-harvesting and coin-cell applications. |
| Dropout Voltage | 235 mV (max) at 200 mA and 3.3 VIN - enables regulation from single Li-ion (3.0 V min) down to 1.8 V output. |
| Input Voltage Range | 1.4 V to 5.5 V - compatible with Li-SOCl₂ (3.6 V), Li-MnO₂ (3.0 V), and two-cell alkaline (3.2 V). |
| Enable Threshold | VEN(HI) = 0.9 V, VEN(LO) = 0.4 V - allows direct interfacing with 1.8-V logic without level-shifting. |
| Thermal Shutdown | 160°C trip, 140°C reset - protects against sustained overloads in sealed enclosures. |
Pinout & Package
TPS7A0518PDBVR is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, with exposed pad not electrically connected. Thermal resistance RθJA is 185.6°C/W, supporting continuous 200-mA operation at +85°C ambient with minimal PCB copper.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply | Accepts 1.4–5.5 V; requires ≥1-µF ceramic capacitor placed adjacent to pin for stability and transient immunity. |
| 2 (GND) | Ground reference | Must connect directly to low-impedance system ground plane; serves as return path for IN, OUT, and EN currents. |
| 3 (EN) | Enable control | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables output and reduces shutdown current to ≤300 nA. |
| 4 (NC) | No-connect | Internally unconnected; may be left floating or tied to GND for mechanical stability - no electrical effect. |
| 5 (OUT) | Regulated output | Delivers 1.8 V ±1%; requires ≥0.47-µF ceramic capacitor close to pin to ensure stability and minimize output ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 1 µA typical IQ enables >10-year battery life in 10-µA average-load applications (e.g., smart sensor nodes). |
| Active output discharge | Integrated pulldown resistor (120 Ω typ) discharges output to <0.1 V within 1 ms after disable - prevents floating bias in downstream circuits. |
| Wide input range | 1.4–5.5 V operation supports diverse primary/secondary chemistries including Li-SOCl₂, Li-MnO₂, and alkaline cells. |
| Stable with small capacitors | Guaranteed stability with ≥0.47-µF ceramic COUT - eliminates need for large tantalum or electrolytic caps in space-constrained designs. |
| Foldback current limiting | Reduces short-circuit current to ~65–150 mA as output collapses - limits power dissipation during faults and aids thermal recovery. |
Applications
| Wearable Health Sensors | Always-On IoT Edge Nodes |
|---|---|
|
Use Scenario: Continuous ECG/PPG monitoring using coin-cell-powered patch sensors with Bluetooth LE wake-up. IC Role / Device Role / Timing Role: Primary 1.8-V supply for ultra-low-power MCU and analog front-end, enabled only during measurement bursts. Use Value: 1 µA IQ minimizes standby drain; active discharge prevents leakage into ADC reference during sleep. |
Use Scenario: Battery-backed environmental sensor node transmitting temperature/humidity every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Always-on 1.8-V rail for RTC, memory retention, and wake-up controller - independent of main system power state. Use Value: 1% output accuracy maintains RTC timing integrity; 235 mV dropout extends usable battery range down to 2.03 V input. |
| Wireless Remote Controls | Portable Medical Diagnostic Tools |
|
Use Scenario: Sub-GHz remote for smart home hubs, operating from two AAA alkaline cells with 10-year shelf life. IC Role / Device Role / Timing Role: Regulated 1.8-V supply for RF transceiver and touch controller, activated only on button press. Use Value: 0.4 V EN threshold allows direct connection to microcontroller GPIO; shutdown current ≤300 nA preserves shelf life. |
Use Scenario: Handheld glucose meter using disposable CR2032 coin cell with 500+ test cycles per battery. IC Role / Device Role / Timing Role: Precision 1.8-V bias for 16-bit ADC and LCD driver, maintaining accuracy across full battery discharge curve. Use Value: ±1% output accuracy ensures consistent ADC reference; 1.4 V min input supports operation until battery reaches 1.4 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0518PDQNR | X2SON-4 (1.0 mm × 1.0 mm); no NC pin; 144.1°C/W RθJA; same electrical specs. | Ultra-dense PCB layouts where board area <1 mm² is critical; no EN pin routing flexibility (EN tied to IN by default). | Select when footprint size dominates over enable control - requires redesigning EN interface and thermal layout. |
| MCP1700T-1802E/TT | 250-mA rated; 1.6 µA IQ (typ); SOT-23-3 (no EN pin); 600 mV dropout at 250 mA; ±2% accuracy. | Cost-sensitive, non-enable applications (e.g., simple sensor modules); lacks active discharge and foldback limiting. | Choose only if EN functionality and fast output discharge are unnecessary - requires verifying higher dropout impact on battery life. |
Compared with TPS7A0518PDBVR, the PDQNR offers superior thermal performance in minimal area but forfeits EN flexibility, while the MCP1700 sacrifices precision, protection features, and ultralow IQ for lower unit cost in static-bias applications.
Availability
TPS7A0518PDBVR is available at Aetrix Electronics and suitable for wearable electronics, always-on IoT edge nodes, and portable medical diagnostic tools requiring stable component supply across long production lifecycles and evolving battery chemistries.
Supply support for TPS7A0518PDBVR 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 and embedded processing technologies, with decades of LDO design expertise and automotive-grade reliability validation.
The TPS7A05 product line targets ultra-low-power, battery-operated systems - engineered specifically for extended shelf life, wide-input compatibility with primary cells, and seamless integration into space-constrained wearables and sensors.
FAQ
What is the maximum output current capability of the TPS7A0518PDBVR?
The TPS7A0518PDBVR is rated for up to 200 mA of continuous output current under recommended operating conditions (TJ ≤ +125°C, COUT ≥ 0.47 µF). Its foldback current limit activates at ~210–700 mA depending on temperature and input voltage, protecting the device during overload or short-circuit events without latch-up.
Does the TPS7A0518PDBVR require an external pull-up resistor on the EN pin?
No - the TPS7A0518PDBVR does not require an external pull-up on EN. When enable functionality is unused, the EN pin must be connected directly to IN (not left floating) to guarantee proper startup and regulation. Its VEN(HI) threshold is 0.9 V, making it compatible with 1.8-V logic without external biasing.
Can the TPS7A0518PDBVR operate from a single Li-SOCl₂ battery?
Yes - the TPS7A0518PDBVR supports input voltages from 1.4 V to 5.5 V, fully covering the nominal 3.6 V and end-of-life ~2.0 V range of Li-SOCl₂ primary cells. Its 235 mV dropout at 200 mA ensures stable 1.8 V output down to 2.03 V input, maximizing usable battery capacity.
What is the purpose of the NC pin on the TPS7A0518PDBVR SOT-23 package?
The NC (no-connect) pin on the TPS7A0518PDBVR DBV package is internally unconnected and serves no electrical function. It may be left floating or tied to GND for mechanical reinforcement during reflow soldering - neither choice affects regulation, efficiency, or thermal performance of the TPS7A0518PDBVR.
How does the active output discharge feature benefit system design with the TPS7A0518PDBVR?
The TPS7A0518PDBVR integrates a 120-Ω pulldown resistor that rapidly discharges the output capacitor when EN is pulled low. This prevents residual voltage from powering downstream logic or causing undefined states during sleep - critical for reliable wake-up sequencing in wearables and IoT sensors using the TPS7A0518PDBVR.
TPS7A0518PDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.382V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- -
- PSRR:
- 40dB (1kHz ~ 1MHz)
- Control Features:
- 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:
- SOT-23-5
TPS7A0518PDBVR FAQ
1.How can I place an order for TPS7A0518PDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A0518PDBVR 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 TPS7A0518PDBVR reliable?
The price and inventory of TPS7A0518PDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A0518PDBVR is usually 5 days.
3.What payment methods are accepted for TPS7A0518PDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A0518PDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A0518PDBVR?
TPS7A0518PDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A0518PDBVR 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 TPS7A0518PDBVR?
For technical support, including TPS7A0518PDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A0518PDBVR requirements.
6.How does Aetrix verify that TPS7A0518PDBVR is sourced from the original manufacturer or authorized distributors?
All TPS7A0518PDBVR 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 TPS7A0518PDBVR meets industry standards.
7.What is the process for return or replacement of TPS7A0518PDBVR?
All TPS7A0518PDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A0518PDBVR, 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 TPS7A0518PDBVR part is unused and in its original packaging.
Return procedure for TPS7A0518PDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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