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Texas Instruments TPS77027DBVT
- Part No.:
- TPS77027DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS77027DBVT.pdf
- Description:
- IC REG LINEAR 2.7V 50MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:570
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Product details
Overview
TPS77027DBVT from Texas Instruments is a fixed-output 2.7V, ultra-low-power (50µA typical quiescent current), low-dropout linear regulator in a 5-pin SOT-23 package. It delivers up to 50mA output current with 1.2% output accuracy over load and temperature, 215mV typical dropout at 100mA, and 46dB PSRR at 1MHz - optimized for battery-powered microcontroller biasing in HVAC control modules.
For engineers reviewing the TPS77027DBVT datasheet, TPS77027DBVT pinout, TPS77027DBVT application, or TPS77027DBVT equivalent, key selection criteria include its 2.5V–16V input range, internal soft-start (750µs), thermal shutdown, overcurrent protection, and compatibility with ≥2.2µF ceramic output capacitors for stable operation in space-constrained industrial embedded systems.
Technical Context
The TPS77027DBVT implements a PMOS pass transistor architecture enabling low dropout and high PSRR performance. Its internal 1.2V reference feeds an error amplifier that regulates output via feedback (adjustable variants) or internal resistor divider (fixed variants like TPS77027DBVT).
It integrates undervoltage lockout (UVLO rising threshold 2.2V, hysteresis 130mV), enable logic with CMOS-compatible thresholds (EN high >1.6V), and pulldown circuitry on OUT during disable - all operating across –40°C to +125°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.7V ±1.2% over full load (0–50mA) and temperature (–40°C to +125°C) |
| Input voltage range | 2.5V to 16V - supports direct regulation from 12V automotive rails or 3.3V/5V intermediate supplies |
| Dropout voltage | 215mV (typ) at 100mA - enables stable 2.7V output even when input drops to 2.915V |
| Quiescent current | 50µA (typ) at zero load - extends battery life in always-on sensor nodes |
| PSRR @ 1MHz | 46dB - attenuates switching noise from upstream DC/DC converters without additional filtering |
| Thermal shutdown | Activates at 173°C junction temperature with 157°C hysteresis - protects against sustained overload or poor PCB heatsinking |
| Enable threshold | EN high >1.6V, low <0.415V - compatible with 1.8V/3.3V GPIO without level-shifting |
Pinout & Package
TPS77027DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm with RθJA = 178.6°C/W. The package supports surface-mount reflow and is rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Power input | Accepts 2.5V–16V supply; requires 1µF ceramic capacitor placed adjacent to IN/GND pins |
| 2 - GND | Ground reference | Common return path for input, output, and internal circuitry; must be low-impedance connection |
| 3 - EN | Enable control | Active-high logic input; drives device ON when >1.6V, OFF when <0.415V; draws <0.02µA in standby |
| 4 - FB/NC | Feedback / No-connect | No connection (NC) for fixed-output TPS77027DBVT; must remain unconnected per datasheet |
| 5 - OUT | Regulated output | Delivers 2.7V ±1.2%; requires ≥2.2µF ceramic capacitor with ESR ≤3Ω placed adjacent to OUT/GND pins |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50µA typical at zero load - enables multi-year operation on coin-cell batteries in remote sensors |
| High PSRR at high frequency | 46dB at 1MHz - suppresses ripple from switching regulators without added LC filters |
| Integrated soft-start | 750µs typical startup time - limits inrush current and prevents input rail sag during power-up |
| Wide input voltage range | 2.5V to 16V - eliminates need for pre-regulation stages when interfacing with 12V automotive or industrial buses |
| Robust fault protection | Thermal shutdown + overcurrent limit (370–450mA) - ensures safe operation under short-circuit or overheating conditions |
Applications
| HVAC Control Module | Residential Air Conditioner |
|---|---|
Use Scenario: Regulating 2.7V supply for MCU, temperature sensor, and display driver in wall-mounted thermostat units. IC Role / Device Role / Timing Role: Primary LDO providing clean, stable bias for low-power microcontroller and analog front-end. Use Value: 1.2% output accuracy ensures consistent ADC reference and sensor calibration across temperature; 50µA quiescent current extends battery life beyond 5 years. | Use Scenario: Powering communication interface (UART/I²C) and status LED in indoor unit control board. IC Role / Device Role / Timing Role: Secondary LDO isolating digital logic from noisy 12V fan/motor supply rail. Use Value: 46dB PSRR at 1MHz rejects switching noise from nearby DC/DC converters, preventing UART framing errors and LED flicker. |
| Washer/Dryer Mainboard | Industrial Transportation Controller |
Use Scenario: Supplying 2.7V to real-time clock (RTC) and EEPROM in appliance main control unit. IC Role / Device Role / Timing Role: Always-on LDO maintaining RTC accuracy and non-volatile memory integrity during AC brownouts. Use Value: UVLO (2.2V rising threshold) prevents RTC corruption during input dips; thermal shutdown protects during motor surge events. | Use Scenario: Biasing CAN transceiver and microcontroller in railcar door control module exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: High-reliability LDO delivering regulated 2.7V across –40°C to +125°C ambient range. Use Value: Specified operation to +125°C ambient and 150°C junction enables use in sealed enclosures near traction inverters without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76927DBVR | Legacy chip variant: 3% output accuracy, 71mV dropout at 100mA, requires ≥4.7µF output capacitor | Lower accuracy and higher dropout limit use in ultra-low-noise or low-input-voltage designs | Select only if legacy design reuse or cost sensitivity outweighs accuracy and PSRR requirements |
| MCP1700T-2702E/MB | Microchip part: 2% accuracy, 175mV dropout at 250mA, 2.3µA quiescent current, SOT-23-3 package | Lacks enable pin and thermal shutdown; limited to lower-current, non-safety-critical applications | Choose for ultra-low-IQ where enable control and fault protection are not required |
Compared with TPS77027DBVT, TPS76927DBVR trades higher accuracy and PSRR for lower dropout, while MCP1700T-2702E/MB offers lower quiescent current but omits critical protection features - making TPS77027DBVT the optimal choice for thermally demanding, safety-aware industrial LDO applications.
Availability
TPS77027DBVT is available at Aetrix Electronics and suitable for HVAC control modules, residential air conditioners, washer/dryer mainboards, and industrial transportation controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS77027DBVT 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 specializing in analog and embedded processing technologies, with leadership in power management ICs and industrial-grade components.
The TPS770 family is designed for ultra-low-power, high-PSRR LDO regulation in battery-operated and automotive systems - emphasizing precision, reliability, and robustness across extended temperature ranges.
FAQ
What is the maximum input voltage rating for the TPS77027DBVT?
The TPS77027DBVT has an absolute maximum input voltage of 18V. Its recommended operating input voltage range is 2.5V to 16V, making it suitable for direct connection to 12V automotive or industrial bus rails without external pre-regulation.
Does the TPS77027DBVT require an external feedback resistor network?
No, the TPS77027DBVT is a fixed-output 2.7V regulator. Pin 4 (FB/NC) is designated as "No Connection" and must remain unconnected - unlike adjustable variants such as TPS77001, which require external resistors to set VOUT.
What is the minimum output capacitance required for stability with the TPS77027DBVT?
The TPS77027DBVT requires a minimum output capacitance of 2.2µF ceramic capacitor with ESR ≤3Ω. This is specified for the "new chip" revision and enables stable operation with smaller, lower-cost MLCCs compared to legacy LDOs needing ≥4.7µF.
How does the enable function operate on the TPS77027DBVT?
The TPS77027DBVT's EN pin is active-high: the device enables when EN voltage exceeds 1.6V (typical) and disables when EN falls below 0.415V (typical). In disable mode, the output is actively pulled down, and quiescent current drops to 0.9µA (typical), supporting ultra-low-power sleep states.
Is the TPS77027DBVT qualified for automotive applications?
The TPS77027DBVT is not AEC-Q100 qualified. It is rated for industrial temperature operation (–40°C to +125°C ambient), making it suitable for under-hood-adjacent but non-safety-critical industrial transportation systems - however, automotive safety-critical functions require AEC-Q100-certified alternatives.
TPS77027DBVT 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):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 28 µA
- Current - Supply (Max):
- -
- 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
TPS77027DBVT FAQ
1.How can I place an order for TPS77027DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77027DBVT 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 TPS77027DBVT reliable?
The price and inventory of TPS77027DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77027DBVT is usually 5 days.
3.What payment methods are accepted for TPS77027DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77027DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77027DBVT?
TPS77027DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77027DBVT 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 TPS77027DBVT?
For technical support, including TPS77027DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77027DBVT requirements.
6.How does Aetrix verify that TPS77027DBVT is sourced from the original manufacturer or authorized distributors?
All TPS77027DBVT 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 TPS77027DBVT meets industry standards.
7.What is the process for return or replacement of TPS77027DBVT?
All TPS77027DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS77027DBVT, 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 TPS77027DBVT part is unused and in its original packaging.
Return procedure for TPS77027DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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