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Texas Instruments TPS76428DBVT
- Part No.:
- TPS76428DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS76428DBVT.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:865
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Product details
Overview
TPS76428DBVT from Texas Instruments is a 2.8-V fixed-output, 150-mA low-dropout linear regulator with PMOS pass element, 50 µV typical output noise, 300 mV typical dropout at 150 mA, and 85 µA typical quiescent current-designed for battery-powered portable electronics requiring stable low-noise voltage regulation.
For engineers reviewing the TPS76428DBVT datasheet, TPS76428DBVT pinout, TPS76428DBVT application, or TPS76428DBVT equivalent, key selection criteria include its 2.8-V output accuracy (±2.5% over load/temperature), SOT-23-5 package footprint, enable-controlled shutdown (<2 µA), thermal/current protection, and compatibility with 4.7-µF output capacitors with 0.2–10 Ω ESR.
Technical Context
The TPS76428DBVT employs a PMOS pass transistor to achieve low dropout and load-invariant quiescent current-unlike PNP-based LDOs-enabling stable operation from 2.7 V input down to 2.8 V output. Its internal bypass filter (0.01 µF) reduces output noise to 50 µV RMS (300 Hz–50 kHz).
It integrates logic-enabled shutdown (EN pin), thermal foldback limiting (trip at ~165°C), and reverse-current protection via built-in back diode. Output voltage tolerance is ±2.5% across 1 mA–150 mA load and –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2.5% (2.716 V to 2.884 V at 25°C, 1–150 mA load) |
| Max Output Current | 150 mA continuous-supports compact power rails in space-constrained portable designs |
| Dropout Voltage | 300 mV typical at 150 mA-enables operation with minimal headroom (e.g., 3.1 V input for 2.8 V output) |
| Output Noise | 50 µV RMS (300 Hz–50 kHz)-critical for noise-sensitive analog/RF circuitry like ADCs or PLLs |
| Quiescent Current | 85 µA typical (0–150 mA load)-extends battery life in always-on or low-duty-cycle systems |
| Shutdown Current | <2 µA at TJ = 25°C-achieved via EN pin low assertion, enabling ultra-low-power sleep modes |
| Operating Temp | –40°C to +125°C junction-validated for automotive cabin, industrial, and extended-temperature embedded use |
Pinout & Package
TPS76428DBVT is housed in a 5-pin SOT-23 (DBV) surface-mount package (2.9 mm × 1.6 mm × 1.1 mm), optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply voltage | Accepts 2.7 V to 10 V; minimum VI = VO + 1 V or 2.7 V, whichever is greater |
| 2 (GND) | Ground reference | Power and signal return path; must be low-impedance for noise control |
| 3 (EN) | Enable input | Active-high logic control; <0.5 V disables regulator, reducing IQ to <2 µA |
| 4 (OUT) | Regulated output | Delivers stable 2.8 V; requires ≥4.7 µF output capacitor with 0.2–10 Ω ESR |
| 5 (BYPASS) | Bypass capacitor terminal | Connects to 0.01 µF capacitor to reduce reference noise and improve PSRR |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass element | Enables constant quiescent current across full 0–150 mA load range-no increase with output current |
| Low-noise architecture | 50 µV RMS output noise with integrated 0.01 µF bypass filter-reduces need for external post-regulation filtering |
| Thermal & current protection | Auto-shutdown at ~165°C junction temp; current limit ~0.8–1.5 A-prevents damage during overload or short-circuit |
| Reverse-current protection | Integrated back diode conducts safely when VIN < VOUT (e.g., during power-down)-eliminates need for external blocking diode |
| Wide input voltage range | 2.7 V to 10 V operation-supports single-cell Li-ion, multi-cell alkaline, or intermediate bus rails |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition powered by coin-cell or small Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.8-V analog supply for precision ADC, op-amps, and low-noise reference. Use Value: 50 µV noise floor ensures >16-bit effective resolution without additional filtering; 85 µA IQ extends battery life beyond 1 year. | Use Scenario: Wireless temperature/humidity node operating in factory or outdoor enclosures (-40°C to +85°C ambient). IC Role / Device Role / Timing Role: Regulated 2.8-V rail for MCU, RF transceiver (sub-GHz), and digital sensor interface. Use Value: –40°C to +125°C junction rating guarantees reliability under thermal cycling; 300 mV dropout enables operation down to 3.1 V input as battery discharges. |
| Portable Medical Ultrasound Probe | Automotive Cabin Infotainment MCU |
Use Scenario: Handheld ultrasound probe with pulsed analog front-end and low-power ARM Cortex-M core. IC Role / Device Role / Timing Role: Low-noise 2.8-V supply for time-of-flight echo processing and clock generation circuitry. Use Value: Bypass pin + 0.01 µF capacitor suppresses switching noise from adjacent DC/DC converters-preserving SNR in analog signal chain. | Use Scenario: Secondary 2.8-V domain for infotainment SoC I/O or display interface in automotive dash system. IC Role / Device Role / Timing Role: Local point-of-load regulator with EN control synchronized to system wake/sleep states. Use Value: <2 µA shutdown current meets ISO 16750-2 quiescent current requirements for always-connected modules; thermal protection prevents latch-up in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | Same 2.8-V output, but 150-mA max, higher 140 µA IQ, no BYPASS pin, lower PSRR (55 dB @ 1 kHz) | Lacks bypass-capacitor noise reduction-less suitable for ultra-low-noise analog rails | Select TPS76428DBVT when output noise ≤50 µV is required; choose TPS76328DBVR only if board space or cost constraints preclude using the BYPASS capacitor. |
| MCP1702T-2802E/MB | 2.8-V fixed, 250-mA output, 4 µA IQ, but 600 mV dropout at 250 mA and no thermal shutdown | No overtemperature protection-requires external thermal monitoring in high-ambient environments | Choose MCP1702T-2802E/MB only for ultra-low-IQ standby applications where dropout and thermal safety are secondary; TPS76428DBVT remains preferred for robustness in portable or industrial settings. |
Compared with TPS76328DBVR and MCP1702T-2802E/MB, the TPS76428DBVT uniquely combines 50 µV noise, integrated thermal protection, and a dedicated BYPASS pin-making it the optimal choice for noise-critical, thermally demanding, or battery-life-sensitive 2.8-V LDO applications.
Availability
TPS76428DBVT is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, portable medical devices, and automotive infotainment subsystems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TPS76428DBVT 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 delivering analog and embedded processing solutions, with leadership in power management ICs and precision analog components.
The TPS764xx family was designed specifically for battery-powered portable electronics-emphasizing ultra-low noise, low dropout, and minimal quiescent current to maximize runtime and signal integrity in space-constrained systems.
FAQ
What is the guaranteed output voltage tolerance of the TPS76428DBVT over temperature and load?
The TPS76428DBVT delivers 2.8 V with ±2.5% tolerance across –40°C to +125°C junction temperature and 1 mA to 150 mA load current. At 25°C and 1–150 mA, output voltage is specified between 2.716 V and 2.884 V per the datasheet's electrical characteristics table-ensuring predictable performance in precision analog and mixed-signal applications where voltage stability is critical.
Does the TPS76428DBVT require an external bypass capacitor, and what value is recommended?
Yes, the TPS76428DBVT requires a 0.01 µF ceramic capacitor connected between the BYPASS pin and GND to achieve its specified 50 µV output noise performance. This capacitor forms a low-pass filter with an internal resistor to suppress reference noise. Omitting it increases output noise significantly-verified in Figure 5 and Application Information section of the datasheet-and degrades PSRR at higher frequencies.
Can the TPS76428DBVT operate with an input voltage below 2.8 V?
No-the TPS76428DBVT requires a minimum input voltage of 2.7 V or VO(typ) + 1 V (i.e., 3.8 V), whichever is greater, per the Recommended Operating Conditions table. Since 2.8 V + 1 V = 3.8 V, the absolute minimum input is 3.8 V for full specification compliance. Operation below this violates datasheet conditions and risks dropout, regulation loss, or undefined behavior-even though the absolute maximum rating allows down to 2.7 V.
What is the thermal shutdown threshold and recovery behavior of the TPS76428DBVT?
The TPS76428DBVT activates thermal shutdown when junction temperature exceeds approximately 165°C. Once triggered, the regulator ceases output until junction temperature falls to ~140°C-providing ~25°C hysteresis. This automatic recovery eliminates need for external reset circuitry and protects against sustained overtemperature events in enclosed or high-ambient environments.
Is the TPS76428DBVT pin-compatible with other members of the TPS764xx family, such as TPS76433DBVT?
Yes-the TPS76428DBVT shares identical SOT-23-5 (DBV) package, pinout (IN, GND, EN, OUT, BYPASS), and footprint with all TPS764xx variants (e.g., TPS76425DBVT, TPS76433DBVT). This allows direct substitution within the same family for different output voltages without PCB redesign-provided external components (especially output capacitor ESR and bypass cap) meet each variant's specific requirements.
TPS76428DBVT 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
TPS76428DBVT FAQ
1.How can I place an order for TPS76428DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76428DBVT 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 TPS76428DBVT reliable?
The price and inventory of TPS76428DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76428DBVT is usually 5 days.
3.What payment methods are accepted for TPS76428DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76428DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76428DBVT?
TPS76428DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76428DBVT 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 TPS76428DBVT?
For technical support, including TPS76428DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76428DBVT requirements.
6.How does Aetrix verify that TPS76428DBVT is sourced from the original manufacturer or authorized distributors?
All TPS76428DBVT 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 TPS76428DBVT meets industry standards.
7.What is the process for return or replacement of TPS76428DBVT?
All TPS76428DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS76428DBVT, 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 TPS76428DBVT part is unused and in its original packaging.
Return procedure for TPS76428DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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