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Texas Instruments TPS76328DBVR
- Part No.:
- TPS76328DBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS76328DBVR.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
TPS76328DBVR from Texas Instruments is a fixed-output 2.8V, 150mA low-dropout linear voltage regulator in a 5-pin SOT-23 (DBV) package. It operates from 2.7V to 10V input, delivers ±1.0% output accuracy (typical, new chip), features 175mV typical dropout at 150mA, and supports thermal shutdown, overcurrent protection, and active overshoot pulldown - ideal for battery-powered smoke detectors and thermostats.
For engineers reviewing the TPS76328DBVR datasheet, TPS76328DBVR pinout, TPS76328DBVR application, or TPS76328DBVR equivalent, this page provides verified electrical specs, validated SOT-23 pin functions, real-world use cases in low-power sensing systems, and two confirmed alternative regulators with documented functional trade-offs.
Technical Context
The TPS76328DBVR implements a PMOS pass transistor architecture enabling ultra-low quiescent current (65μA at zero load) and stable operation with small ceramic output capacitors (≥1μF). Its enable pin (EN) supports logic-level control with 0.15V low-threshold shutdown, reducing standby current to ≤1.25μA.
It integrates internal soft-start (new-chip variant) to limit inrush current during power-up and features active pulldown on VOUT during disable to prevent output voltage overshoot - critical for interfacing with sensitive microcontrollers and analog sensors in metering applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1.0% (typical, new chip) across –40°C to 125°C and 1mA–150mA load - ensures stable MCU core supply under battery voltage sag. |
| Max Output Current | 150mA continuous - sufficient for low-power microcontrollers, PIR motion sensors, and LCD displays in portable devices. |
| Dropout Voltage | 175mV typical at 150mA - enables regulation from 3.0V input down to end-of-life battery voltages (e.g., 2.9V alkaline). |
| Quiescent Current | 65μA at IOUT = 0mA; 765μA at 150mA - minimizes battery drain in always-on sensor nodes. |
| Enable Threshold | EN high threshold: 0.85V (min); low threshold: 0.15V (max) - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Protection | Integrated thermal shutdown with automatic recovery - prevents damage during sustained overload or poor PCB heatsinking. |
| PSRR | 58dB at 1kHz - suppresses ripple from noisy DC-DC converters feeding the LDO input. |
Pinout & Package
TPS76328DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with RθJA = 178.6°C/W (new chip), suitable for compact, thermally constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply | Accepts 2.7V–10V; requires ≥0.47μF ceramic capacitor to GND for stability and transient response. |
| GND (Pin 2) | Ground reference | Low-impedance return path for input/output currents; must be connected directly to system ground plane. |
| EN (Pin 3) | Enable control | Active-high logic input; drives high (>0.85V) to enable regulator; pulls low (<0.15V) for <1.25μA standby mode. |
| NC/FB (Pin 4) | No-connect (fixed version) | Not internally connected - leave unconnected or float; not used for feedback (only adjustable variants use FB). |
| OUT (Pin 5) | Regulated output | Delivers 2.8V ±1.0%; requires ≥1μF (min) ceramic capacitor to GND; ESR <1Ω recommended for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65μA at zero load enables >1-year battery life in 10μA average-current IoT sensors. |
| Active overshoot pulldown | Internally discharges VOUT during disable to prevent voltage spikes that could reset downstream logic. |
| Internal soft-start | Gradually ramps output during power-up to limit inrush current and avoid input rail collapse. |
| Logic-compatible enable | 0.15V low-threshold EN allows direct interface with deep-sleep MCU GPIO without external pull-ups. |
| Stable with ceramic capacitors | Supports 1μF–220μF output capacitance; no ESR requirement simplifies BOM and layout. |
Applications
| Smoke Detector Power Management | Smart Thermostat Core Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-M0+ MCU, CO sensor analog front-end, and RF transceiver in battery-operated residential smoke alarms. IC Role / Device Role / Timing Role: Primary 2.8V LDO delivering clean, regulated supply to mixed-signal subsystems with tight voltage tolerance. Use Value: 175mV dropout extends usable battery range by 0.3V per cell; 65μA IQ enables multi-year shelf life in standby. |
Use Scenario: Supplies 2.8V to HVAC controller MCU, temperature/humidity sensor ICs, and display driver in programmable thermostats. IC Role / Device Role / Timing Role: Fixed-voltage regulator providing noise-immune power to precision analog sensing circuits and digital logic. Use Value: 58dB PSRR attenuates switching noise from nearby DC-DC converters; ±1.0% accuracy maintains ADC reference integrity. |
| PIR Motion Sensor Node | Electricity Meter Auxiliary Rail |
|
Use Scenario: Powers passive infrared (PIR) signal conditioning circuitry and BLE SoC in wireless occupancy sensors. IC Role / Device Role / Timing Role: Low-noise, enable-controlled LDO enabling duty-cycled operation to minimize average current draw. Use Value: EN pin allows MCU to shut down regulator between motion detection windows, reducing average current to <1μA. |
Use Scenario: Generates isolated 2.8V auxiliary rail for metrology ADC, real-time clock, and tamper-detection circuitry in smart electricity meters. IC Role / Device Role / Timing Role: Secondary LDO decoupling high-precision analog blocks from noisy main power rails. Use Value: Thermal shutdown protects against fault conditions in sealed meter enclosures; 125°C max junction rating supports wide ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVT | Same silicon die and specs, but in tape-and-reel packaging (250-unit reel vs. DBVR's 3000-unit reel); identical electrical behavior and pinout. | No functional difference; selected only for assembly line feed compatibility or smaller order quantities. | Choose DBVT for prototyping or low-volume production where reel size impacts pick-and-place setup. |
| MCP1700T-2802E/TT | 100mA max output, 6μA IQ, 170mV dropout at 100mA; no enable pin; fixed 2.8V output; SOT-23-3 package (no EN/NC pins). | Lacks enable control and thermal shutdown; limited to lower-current, non-shutdown applications like simple sensor biasing. | Select only if system load ≤100mA and enable functionality is unnecessary - avoids extra PCB routing for EN. |
Compared with TPS76328DBVR, the DBVT offers identical performance in smaller reels for flexibility, while the MCP1700 trades enable/shutdown capability and 150mA drive for ultra-low IQ - making it viable only in simpler, lower-power roles without dynamic power management.
Availability
TPS76328DBVR is available at Aetrix Electronics and suitable for smoke detectors, thermostats, PIR motion sensors, and electricity meters requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature and load.
Supply support for TPS76328DBVR 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 expertise in power management IC design and high-volume manufacturing reliability.
The TPS763 family was engineered for cost-sensitive, space-constrained battery-powered applications demanding low IQ, robust thermal behavior, and simplified external component requirements - especially in safety-critical and utility-grade sensing systems.
FAQ
What is the maximum input voltage rating for the TPS76328DBVR?
The TPS76328DBVR has an absolute maximum input voltage of 18V for the new-chip revision, but its recommended operating range is 2.7V to 10V. Exceeding 10V may degrade long-term reliability or trigger overvoltage protection in some batches, so 10V remains the safe design limit per TI's recommended conditions.
Does the TPS76328DBVR require an external feedback resistor network?
No. The TPS76328DBVR is a fixed-output variant - its 2.8V regulation is set internally. Pin 4 (FB/NC) is a no-connect terminal, not tied to any internal feedback node. External resistors are only required for adjustable versions like TPS76333.
Can the TPS76328DBVR operate with a 1μF ceramic output capacitor?
Yes. The TPS76328DBVR is explicitly characterized and stabilized with 1μF to 220μF ceramic capacitors (ESR <1Ω). Unlike older LDOs, it does not require tantalum or aluminum electrolytic capacitors, simplifying BOM and improving reliability.
What is the minimum enable voltage needed to activate the TPS76328DBVR?
The TPS76328DBVR requires a minimum high-level enable voltage of 0.85V (typical) to turn on. Its guaranteed low-level disable threshold is ≤0.15V, allowing direct connection to 1.8V or 3.3V microcontroller GPIO pins without level-shifting circuitry.
How does the TPS76328DBVR handle short-circuit events?
The TPS76328DBVR incorporates foldback current limiting and thermal shutdown. Under short-circuit, output current is limited to ~0.8–1.05A (new chip), and junction temperature rise triggers shutdown at ~150°C, with automatic recovery once temperature falls below the hysteresis threshold.
TPS76328DBVR 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):
- 10V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 140 µA
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS76328DBVR FAQ
1.How can I place an order for TPS76328DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76328DBVR 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 TPS76328DBVR reliable?
The price and inventory of TPS76328DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76328DBVR is usually 5 days.
3.What payment methods are accepted for TPS76328DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76328DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76328DBVR?
TPS76328DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76328DBVR 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 TPS76328DBVR?
For technical support, including TPS76328DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76328DBVR requirements.
6.How does Aetrix verify that TPS76328DBVR is sourced from the original manufacturer or authorized distributors?
All TPS76328DBVR 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 TPS76328DBVR meets industry standards.
7.What is the process for return or replacement of TPS76328DBVR?
All TPS76328DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS76328DBVR, 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 TPS76328DBVR part is unused and in its original packaging.
Return procedure for TPS76328DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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