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Texas Instruments TPS77033DBVRG4
- Part No.:
- TPS77033DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS77033DBVRG4.pdf
- Description:
- IC REG LINEAR 3.3V 50MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,680
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Product details
Overview
TPS77033DBVRG4 from Texas Instruments is a fixed-output 3.3V, ultra-low-power (50µA quiescent current), low-dropout linear regulator in SOT-23-5 package, supporting 2.5V–16V input and delivering up to 100mA output with ±1.2% accuracy over load and temperature. It integrates thermal shutdown, overcurrent protection, undervoltage lockout (UVLO), and enable control - ideal for powering microcontrollers and sensors in HVAC and industrial transportation systems.
For engineers reviewing the TPS77033DBVRG4 datasheet, TPS77033DBVRG4 pinout, TPS77033DBVRG4 application, or TPS77033DBVRG4 equivalent, key selection considerations include its 150mV typical dropout at 100mA, 46dB PSRR at 1MHz, 750µs internal soft-start, 2.2µF minimum stable output capacitance, and operation across –40°C to +125°C ambient.
Technical Context
The TPS77033DBVRG4 implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its feedback loop uses an internal 1.2V reference and supports stable regulation with ceramic capacitors down to 2.2µF and ESR as low as 0Ω.
Integrated UVLO (rising threshold 2.2V, hysteresis 130mV) and enable logic with 0.415V low-level threshold ensure robust power sequencing. Thermal shutdown activates at 173°C and resets at 157°C, while current limiting holds output at ~370–450mA during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±1.2% over full load (0–100mA) and temperature (–40°C to +125°C) |
| Input voltage range | 2.5V to 16V - enables direct regulation from 12V rails or wide-input industrial supplies |
| Dropout voltage | 150mV (typ) at 100mA - allows operation with minimal headroom, e.g., 3.45V input for 3.3V output |
| PSRR | 46dB at 1MHz - suppresses switching noise from upstream DC/DC converters without added filtering |
| Quiescent current | 50–95µA (adjustable/fixed version, IOUT = 0mA) - extends battery life in always-on sensor nodes |
| Soft-start time | 750µs (typ) - limits inrush current, reducing required input capacitance and stress on source |
| Thermal resistance | RθJA = 178.6°C/W (DBV package) - defines maximum power dissipation (e.g., 330mW at TA = 85°C) |
Pinout & Package
TPS77033DBVRG4 is housed in a 5-pin SOT-23 (DBV) package, 2.9mm × 2.8mm footprint, with exposed pad not electrically connected. Thermal performance assumes JEDEC 2s2p PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input supply connection | Accepts 2.5V–16V; requires ≥1µF input capacitor placed adjacent to IN/GND pins |
| 2: GND | Power ground reference | Common return path for input, output, and internal circuitry; must be low-impedance |
| 3: EN | Enable control input | Active-high logic: <0.415V disables, >1.6V enables; supports power sequencing and standby modes |
| 4: FB/NC | Feedback / No-connect | No connection (NC) for fixed-output TPS77033; must remain unconnected per datasheet |
| 5: OUT | Regulated output | Delivers 3.3V ±1.2%; requires ≥2.2µF ceramic output capacitor with ESR ≤3Ω |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50–95µA at zero load - enables multi-year battery operation in remote sensors |
| High PSRR at high frequency | 46dB at 1MHz - mitigates noise from 1MHz+ switching regulators without LC filters |
| Integrated UVLO with hysteresis | 2.2V rising / 2.07V falling threshold (130mV hysteresis) - prevents erratic startup near brownout |
| Stable with low-ESR ceramics | Supports 0–3Ω ESR output capacitors - eliminates need for tantalum or aluminum electrolytics |
| Internal soft-start | 750µs ramp time - reduces peak input current by >50% vs hard-start LDOs |
Applications
| Residential Air Conditioners | HVAC Systems |
|---|---|
Use Scenario: Powering MCU-based thermostat controllers and environmental sensor interfaces in split-system AC units. IC Role / Device Role / Timing Role: Primary 3.3V bias rail for low-power microcontrollers and analog front-ends. Use Value: 125°C operating range and 16V input support allow direct regulation from HVAC 12V auxiliary rails without pre-regulation. | Use Scenario: Supplying control logic and communication ICs (e.g., RS-485 transceivers) in rooftop HVAC units. IC Role / Device Role / Timing Role: Stable 3.3V LDO for real-time control subsystems requiring immunity to line transients. Use Value: 46dB PSRR at 1MHz attenuates noise from variable-frequency drive (VFD) power stages, improving UART reliability. |
| Washers and Dryers | Industrial Transportation |
Use Scenario: Providing regulated 3.3V to motor control MCUs and user interface displays in smart laundry appliances. IC Role / Device Role / Timing Role: Enable-controlled power domain for energy-saving sleep/wake cycles. Use Value: 0.9–2.75µA standby current (EN = VIN) minimizes off-state leakage, meeting Energy Star standby requirements. | Use Scenario: Biasing CAN transceivers and diagnostic modules in railcar control cabinets exposed to wide ambient swings. IC Role / Device Role / Timing Role: High-reliability 3.3V supply tolerant of automotive-grade voltage transients and thermal cycling. Use Value: Thermal shutdown (173°C trip) and –40°C to +125°C operation ensure continuous function in under-hood or chassis-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76933DBVR | Legacy variant: 3% output accuracy, 71mV dropout at 100mA, 4.7µF min COUT, 13.5V max VIN | Lower accuracy and PSRR; suitable only where cost sensitivity outweighs performance needs | Use only if legacy design reuse or qualification constraints require identical spec sheet revision |
| MCP1700T-3302E/MB | Microchip part: 250mA output, 6µA IQ, but only 6V max VIN and no enable or UVLO | Lacks enable control and UVLO - unsuitable for sequenced or wide-input industrial systems | Select when ultra-low IQ dominates requirements and input stays below 6V |
Compared with TPS77033DBVRG4, TPS76933DBVR trades higher accuracy and PSRR for lower cost and legacy compatibility, while MCP1700T-3302E/MB offers lower IQ but sacrifices input voltage range, enable functionality, and fault protection - making TPS77033DBVRG4 optimal for thermally demanding, wide-input, and safety-aware industrial LDO applications.
Availability
TPS77033DBVRG4 is available at Aetrix Electronics and suitable for residential air conditioners, HVAC systems, and industrial transportation equipment requiring stable component supply, long-term lifecycle support, and automotive-grade thermal reliability.
Supply support for TPS77033DBVRG4 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 power management technologies, with decades of LDO design expertise and broad industrial qualification.
The TPS770 family targets ultra-low-power, high-PSRR LDO applications in battery-powered and harsh-environment systems - emphasizing thermal robustness, wide input range, and integrated protection for industrial and automotive control subsystems.
FAQ
What is the maximum input voltage rating for TPS77033DBVRG4?
The absolute maximum input voltage for TPS77033DBVRG4 is 18V, with recommended continuous operation up to 16V. Exceeding 18V risks permanent damage. This 16V operating limit enables direct regulation from common 12V industrial rails and accommodates transient spikes in automotive or HVAC environments - a key differentiator from legacy 10V-max LDOs like the TPS76933DBVR.
Does TPS77033DBVRG4 require an external feedback resistor network?
No, TPS77033DBVRG4 is a fixed-output 3.3V regulator and does not require external feedback resistors. Pin 4 (FB/NC) is designated "No Connection" and must remain unconnected. This simplifies layout and eliminates resistor tolerance errors - unlike adjustable variants such as TPS77001, which use the same DBV package but require R1/R2 to set VOUT.
What is the minimum output capacitance required for stability with TPS77033DBVRG4?
TPS77033DBVRG4 requires a minimum 2.2µF ceramic output capacitor with ESR ≤3Ω for guaranteed stability across temperature and load. This is half the 4.7µF requirement of legacy TPS76933 variants, enabling smaller, lower-cost, and more reliable ceramic-only designs without tantalum or electrolytic capacitors.
How does the enable (EN) pin function on TPS77033DBVRG4?
The EN pin on TPS77033DBVRG4 is active-high: driving it above 1.6V (min) enables regulation, while pulling it below 0.415V (max) disables the output and reduces quiescent current to ≤2.75µA. This precise threshold enables clean interfacing with 1.8V/3.3V GPIOs and supports low-power wake-up architectures in battery-operated HVAC sensors.
What thermal protection features are integrated into TPS77033DBVRG4?
TPS77033DBVRG4 integrates thermal shutdown that trips at 173°C junction temperature and resets at 157°C, providing hysteresis to prevent oscillation near thermal limit. Combined with overcurrent limiting (~370–450mA) and UVLO, this ensures safe operation during overload, short-circuit, or high-ambient conditions - critical for sealed HVAC control boards where airflow is limited.
TPS77033DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 50mA
- 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
TPS77033DBVRG4 FAQ
1.How can I place an order for TPS77033DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77033DBVRG4 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 TPS77033DBVRG4 reliable?
The price and inventory of TPS77033DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77033DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS77033DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77033DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77033DBVRG4?
TPS77033DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77033DBVRG4 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 TPS77033DBVRG4?
For technical support, including TPS77033DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77033DBVRG4 requirements.
6.How does Aetrix verify that TPS77033DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS77033DBVRG4 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 TPS77033DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS77033DBVRG4?
All TPS77033DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS77033DBVRG4, 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 TPS77033DBVRG4 part is unused and in its original packaging.
Return procedure for TPS77033DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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