My Inquiry
My Account
Texas Instruments TPS79028DBVT
- Part No.:
- TPS79028DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS79028DBVT.pdf
- Description:
- IC REG LINEAR 2.8V 50MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:526
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS79028DBVT from Texas Instruments is a 2.8-V, 50-mA ultralow-power, low-noise LDO voltage regulator in a 5-pin SOT-23 (DBV) package. It features 60 mV typical dropout at 50 mA, 17 µA quiescent current, 1 µA standby current, and 56 µVRMS output noise (with 0.01 µF bypass capacitor). It is designed for battery-powered portable electronics requiring stable, quiet, low-quiescent-power regulation.
For engineers reviewing the TPS79028DBVT datasheet, TPS79028DBVT pinout, TPS79028DBVT application, or TPS79028DBVT equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in portable systems, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The TPS79028DBVT uses a PMOS pass element instead of a conventional PNP transistor, enabling dropout voltage directly proportional to load current and eliminating drive-current dependency on output load. Its internal 150-kΩ resistor at the BYPASS pin forms an RC filter with an external ceramic capacitor to suppress reference noise.
It integrates overcurrent limiting (~350 mA), thermal shutdown (~165°C trip, ~140°C recovery), and logic-controlled enable with ~1.5 V threshold. The device operates across –40°C to 125°C junction temperature and supports input voltages from 3.8 V to 10 V for stable 2.8-V output regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2.8% (–40°C to 125°C), ensuring stable core supply for 2.8-V microcontrollers and sensors |
| Max Output Current | 50 mA continuous, sufficient for low-power MCU cores, RF transceivers, and precision analog circuitry |
| Dropout Voltage | 60 mV typical at 50 mA (25°C); enables operation with minimal headroom-e.g., 3.8 V input for 2.8 V output |
| Quiescent Current | 17 µA typical at full load (0–50 mA), enabling multi-year battery life in always-on sensor nodes |
| Output Noise | 56 µVRMS (300 Hz–50 kHz, 0.01 µF bypass + 10 µF output cap), critical for ADC reference and RF LNA biasing |
| Enable Threshold | ~1.5 V logic-compatible EN pin; <0.9 V enables, ≥1.7 V disables-supports direct connection to GPIOs without level shifters |
| Thermal Protection | Auto-shutdown at ~165°C junction temperature with ~25°C hysteresis, preventing permanent damage during overload |
Pinout & Package
TPS79028DBVT is housed in a 5-pin SOT-23 (DBV) surface-mount package measuring 2.9 mm × 1.6 mm × 1.15 mm (JEDEC MO-178 compliant), optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply voltage | Accepts 3.8 V to 10 V DC; requires local 0.047 µF+ ceramic bypass capacitor for transient immunity |
| 2 - GND | Ground reference | Common return path for input, output, and internal circuitry; must be low-impedance for noise control |
| 3 - EN | Enable input | Active-low logic control: <0.9 V enables regulation; ≥1.7 V disables, reducing ground current to 1 µA |
| 4 - BYPASS | Bypass filter node | Connects to internal 150-kΩ resistor; external 0.01–0.1 µF ceramic cap reduces reference noise and output ripple |
| 5 - OUT | Regulated output | Delivers stable 2.8 V; requires ≥4.7 µF output capacitor with ESR 0.2–10 Ω for loop stability |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables ultra-low dropout (60 mV @ 50 mA) and constant quiescent current across full load range |
| Low-Noise BYPASS Architecture | 150-kΩ internal resistor + external ceramic cap creates tunable low-pass filter, cutting output noise to 56 µVRMS |
| Logic-Compatible Enable | No external pull-up needed; direct interfacing with 1.8/3.3-V MCUs simplifies power sequencing and sleep-mode control |
| Integrated Protection | Current limit (~350 mA) and thermal shutdown prevent failure under short-circuit or high ambient conditions |
| Wide Temperature Range | Specified operation from –40°C to 125°C junction temperature supports automotive cabin and industrial edge deployments |
Applications
| Wearable Health Monitor | IoT Edge Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides ultra-low-noise 2.8-V supply to precision analog front-end and 16-bit ADC. Use Value: 56 µVRMS noise ensures >90 dB SNR; 17 µA quiescent current extends battery life beyond 2 years. |
Use Scenario: Battery-operated environmental sensor transmitting via BLE every 5 minutes. IC Role / Device Role / Timing Role: Powers 2.8-V MCU and digital humidity/temperature sensor during active and deep-sleep cycles. Use Value: 1 µA standby current minimizes leakage during 99.9% sleep time; fast EN wake-up (<100 µs) enables responsive sensing. |
| Portable Medical Diagnostic Tool | Industrial Handheld Scanner |
|
Use Scenario: Handheld ultrasound probe with integrated FPGA and analog beamformer. IC Role / Device Role / Timing Role: Supplies clean 2.8-V rail to low-power FPGA I/O banks and analog signal chain components. Use Value: Low dropout allows operation from aging Li-ion cells (down to 3.8 V); thermal protection prevents overheating during burst processing. |
Use Scenario: Rugged barcode scanner operating in warehouse environments (–20°C to 70°C ambient). IC Role / Device Role / Timing Role: Regulates 2.8-V supply for CMOS image sensor and laser driver IC. Use Value: –40°C to 125°C junction rating ensures reliability across wide ambient swings; SOT-23 footprint saves board area in compact housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79128DBVR | Same 2.8-V output, but 100-mA rating and 250-µA quiescent current; includes reverse-voltage protection diode | Higher load capability suits dual-rail sensor interfaces; higher IQ limits use in multi-year coin-cell designs | Select when >50 mA peak current or reverse-input tolerance is required; not drop-in due to different quiescent behavior |
| MCP1702T-2802E/MB | 2.8-V fixed output, 250-mA rating, 4 µA quiescent current, but no BYPASS pin or ultra-low-noise architecture | Lacks noise-filtering capability; unsuitable for ADC reference or RF bias where 56 µVRMS is critical | Choose only for cost-sensitive, non-noise-critical 2.8-V loads; requires redesign if noise performance is mandatory |
Compared with TPS79028DBVT, TPS79128DBVR trades ultralow IQ and noise for higher current and reverse-protection, while MCP1702T-2802E/MB offers lower IQ but sacrifices noise performance and lacks BYPASS-based filtering-making TPS79028DBVT uniquely suited for precision, battery-limited, low-noise applications.
Availability
TPS79028DBVT is available at Aetrix Electronics and suitable for wearable health monitors, IoT edge sensor nodes, portable medical diagnostic tools, and industrial handheld scanners requiring stable component supply with guaranteed long-term sourcing.
Supply support for TPS79028DBVT 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 expertise in power management ICs.
The TPS790xx family was engineered specifically for battery-powered portable equipment, emphasizing ultralow quiescent current, low-noise regulation, and minimal board space-enabling longer runtime and higher signal integrity in space-constrained devices.
FAQ
What is the minimum input voltage required for stable operation of the TPS79028DBVT?
The TPS79028DBVT requires a minimum input voltage of 3.8 V under recommended operating conditions-calculated as VO(typ) + 1 V = 2.8 V + 1 V. This ensures adequate headroom for the 60 mV typical dropout voltage at 50 mA load. Operation below 3.8 V risks dropout and output regulation loss, especially at elevated temperatures or full load.
How does the BYPASS pin on the TPS79028DBVT reduce output noise?
The TPS79028DBVT's BYPASS pin connects internally to the voltage reference through a 150-kΩ resistor. When a ceramic capacitor (e.g., 0.01 µF) is placed between BYPASS and GND, it forms an RC low-pass filter that attenuates reference noise before it modulates the output. This architecture achieves 56 µVRMS output noise-critical for high-resolution ADCs and sensitive RF stages.
Can the TPS79028DBVT be used in automotive applications?
Yes-the TPS79028DBVT is qualified for operation across –40°C to 125°C junction temperature and features integrated thermal shutdown and current limiting. While not AEC-Q100 certified, its robustness and wide temperature range make it suitable for non-safety-critical automotive cabin modules such as infotainment peripherals or telematics sensors, provided system-level qualification is completed.
What output capacitor is required for stability with the TPS79028DBVT?
The TPS79028DBVT requires a minimum 4.7 µF output capacitor with ESR between 0.2 Ω and 10 Ω for guaranteed stability. Ceramic, tantalum, or aluminum electrolytic capacitors meeting these specs are acceptable. Using <4.7 µF risks oscillation; exceeding 10 Ω ESR may degrade transient response and noise rejection.
Does the TPS79028DBVT support reverse current protection?
No-the TPS79028DBVT's PMOS pass element includes an intrinsic back-gate diode that conducts reverse current when VIN < VOUT, such as during power-down. This is not protected. If reverse current must be blocked, an external Schottky diode in series with the input or a dedicated reverse-protection IC is required.
TPS79028DBVT 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):
- 0.13V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 28 µA
- Current - Supply (Max):
- -
- PSRR:
- 85dB (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
TPS79028DBVT FAQ
1.How can I place an order for TPS79028DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79028DBVT 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 TPS79028DBVT reliable?
The price and inventory of TPS79028DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79028DBVT is usually 5 days.
3.What payment methods are accepted for TPS79028DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79028DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79028DBVT?
TPS79028DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79028DBVT 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 TPS79028DBVT?
For technical support, including TPS79028DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79028DBVT requirements.
6.How does Aetrix verify that TPS79028DBVT is sourced from the original manufacturer or authorized distributors?
All TPS79028DBVT 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 TPS79028DBVT meets industry standards.
7.What is the process for return or replacement of TPS79028DBVT?
All TPS79028DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS79028DBVT, 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 TPS79028DBVT part is unused and in its original packaging.
Return procedure for TPS79028DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS79028DBVT Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
