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Texas Instruments TPS77018DBVRG4
- Part No.:
- TPS77018DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS77018DBVRG4.pdf
- Description:
- IC REG LINEAR 1.8V 50MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,329
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Product details
Overview
TPS77018DBVRG4 from Texas Instruments is a fixed-output 1.8V, 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/temperature, integrated thermal shutdown and overcurrent protection, and designed for battery-powered microcontroller biasing in HVAC and industrial control systems.
For engineers reviewing the TPS77018DBVRG4 datasheet, TPS77018DBVRG4 pinout, TPS77018DBVRG4 application, or TPS77018DBVRG4 equivalent, key selection criteria include its 1.8V fixed output, 215mV typical dropout at 100mA, 46dB PSRR at 1MHz, internal soft-start (750µs), and compatibility with ≥2.2µF ceramic output capacitors - all critical for stable low-noise MCU power in space-constrained embedded designs.
Technical Context
The TPS77018DBVRG4 implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its internal 1.2V reference feeds an error amplifier controlling the pass element, with feedback loop stabilized by external output capacitance and ESR range (0–3Ω). The device integrates UVLO (2.2V rising threshold), enable logic with hysteresis, and thermal shutdown (173°C trip, 157°C reset).
It operates across –40°C to +125°C junction temperature, supports 100mA continuous output with current limiting (370–450mA), and features undervoltage lockout, internal soft-start, and output pulldown during disable - ensuring robust startup, fault recovery, and system-level power sequencing in automotive-grade environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8V ±1.2% over load/temperature - ensures stable core voltage for 1.8V MCUs without external resistors. |
| Input voltage range | 2.5V to 16V - enables direct operation from 12V rails or wide-range industrial supplies without pre-regulation. |
| Dropout voltage | 215mV (typ) at 100mA - allows regulation down to VIN = 2.015V, maximizing battery runtime in 2-cell Li-ion or 3.3V backup systems. |
| Quiescent current | 50–95µA (adjustable/fixed version, IOUT = 0mA) - minimizes standby power loss in always-on sensor nodes. |
| PSRR @ 1MHz | 46dB - attenuates switching noise from upstream DC/DC converters, reducing need for post-filtering in mixed-signal systems. |
| Output capacitor | ≥2.2µF ceramic (ESR 0–3Ω) - enables compact, low-ESR capacitor selection for high-frequency stability and transient response. |
| Enable threshold | High: 1.6V, Low: 0.415V - provides clean digital enable control compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
TPS77018DBVRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with RθJA = 178.6°C/W, suitable for thermally constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–16V input; requires 1µF ceramic capacitor placed adjacent to IN/GND pins to suppress high-frequency noise. |
| 2 - GND | Power ground reference | Common return path for input/output currents; must be connected to low-impedance ground plane to maintain PSRR and stability. |
| 3 - EN | Active-low enable control | Drives low to enable regulator; high disables output and reduces quiescent current to ≤2.75µA - enables system-level power gating. |
| 4 - FB/NC | Feedback / No-connect | No connection (NC) for fixed-output variants like TPS77018DBVRG4; must remain unconnected per datasheet to avoid instability. |
| 5 - OUT | Regulated output | Delivers 1.8V ±1.2%; requires ≥2.2µF ceramic capacitor with ESR ≤3Ω placed directly at OUT/GND pins for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50–95µA at zero load - extends battery life in wireless sensors and portable HVAC controllers. |
| High PSRR (46dB @ 1MHz) | Reduces conducted noise coupling into sensitive analog/MCU domains, lowering BOM cost by eliminating extra LC filters. |
| Integrated soft-start (750µs) | Controls inrush current during power-up, preventing input rail sag and enabling smaller input capacitors (1µF). |
| Thermal shutdown & OCP | Auto-recovery thermal protection (173°C trip) and current limit (370–450mA) prevent damage during overload or poor heatsinking. |
| UVLO with hysteresis | Enables reliable start-up only when input exceeds 2.2V (rising) and prevents oscillation near brownout thresholds (0.13V hysteresis). |
Applications
| Residential HVAC Control | Industrial Motor Drives |
|---|---|
|
Use Scenario: Powering 1.8V microcontrollers and interface ICs in smart thermostats and zone controllers. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying MCU core and ADC reference, replacing discrete regulators. Use Value: Enables direct 12V-to-1.8V conversion with <215mV dropout and 46dB PSRR, eliminating intermediate 5V/3.3V stages and reducing board area by 30%. |
Use Scenario: Biasing gate drivers and isolated communication interfaces in variable-frequency drives. IC Role / Device Role / Timing Role: Stable 1.8V supply for SPI-isolator logic and PWM controller peripherals under noisy motor bus conditions. Use Value: Maintains ±1.2% output accuracy across –40°C to +125°C and rejects 1MHz switching noise from IGBT gate drivers via 46dB PSRR. |
| Washer/Dryer Mainboard | Automotive Body Control Module |
|
Use Scenario: Supplying 1.8V logic for touch UI processors and sensor signal chains in appliance mainboards. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock and wake-up circuitry during standby mode. Use Value: Draws only 0.9–2.75µA in shutdown (EN = high), meeting ENERGY STAR standby power requirements (<100µA total system). |
Use Scenario: Regulating 1.8V for CAN transceiver logic and LIN interface ICs in body electronics modules. IC Role / Device Role / Timing Role: Fault-tolerant power source with thermal shutdown and UVLO, compliant with AEC-Q100 Grade 1 (–40°C to +125°C). Use Value: Supports 16V max input for load-dump immunity and delivers 100mA with 215mV dropout - sufficient for dual CAN/LIN operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76918DBVR | Legacy variant: 3% output accuracy, 71mV dropout at 100mA, 2.7–10V input, requires ≥4.7µF output cap. | Lower PSRR (60dB @ 1kHz), no UVLO or soft-start - suitable only for non-critical, low-noise legacy designs. | Choose only if existing design uses TPS76918DBVR and cannot accommodate tighter accuracy or higher input voltage. |
| MCP1700T-1802E/TT | Microchip part: 2% accuracy, 178mV dropout at 250mA, 2.7–13.2V input, 1.8µA quiescent current, no enable pin. | Lacks EN and UVLO; optimized for ultra-low IQ but not for sequenced power systems requiring controlled enable. | Select when lowest possible quiescent current is mandatory and enable functionality is handled externally. |
Compared with TPS77018DBVRG4, TPS76918DBVR offers lower dropout but sacrifices accuracy, PSRR, and protection features; MCP1700T-1802E/TT achieves ultra-low IQ but omits enable and UVLO - making TPS77018DBVRG4 the optimal balance of precision, protection, and system integration for new automotive and industrial designs.
Availability
TPS77018DBVRG4 is available at Aetrix Electronics and suitable for residential HVAC control, industrial motor drives, washer/dryer mainboards, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS77018DBVRG4 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 solutions, with decades of expertise in high-reliability LDO design for automotive and industrial markets.
The TPS770 family was engineered for ultra-low-power, high-PSRR regulation in battery-backed and wide-input industrial systems - targeting applications where precision, thermal resilience, and integrated protection are non-negotiable.
FAQ
What is the maximum input voltage rating for the TPS77018DBVRG4?
The TPS77018DBVRG4 has an absolute maximum input voltage of 18V, with recommended operating range from 2.5V to 16V. Exceeding 18V risks permanent damage; operation above 16V is outside specification and may degrade output accuracy or trigger UVLO shutdown.
Does the TPS77018DBVRG4 require an external feedback resistor network?
No - the TPS77018DBVRG4 is a fixed-output 1.8V regulator. Pin 4 (FB/NC) is a no-connect terminal and must remain unconnected; adding external resistors will cause regulation failure or instability.
What output capacitor value and type are required for stable operation of the TPS77018DBVRG4?
The TPS77018DBVRG4 requires ≥2.2µF ceramic output capacitance with ESR between 0Ω and 3Ω. X7R or X5R dielectrics are recommended; tantalum or aluminum electrolytics are not supported due to ESR and aging limitations.
How does the enable (EN) pin function on the TPS77018DBVRG4?
The EN pin is active-low: driving it below 0.415V disables the regulator and reduces quiescent current to ≤2.75µA; pulling it above 1.6V enables regulation. Internal hysteresis prevents chatter near the threshold, ensuring clean power sequencing.
Is the TPS77018DBVRG4 qualified for automotive applications?
The TPS77018DBVRG4 is not AEC-Q100 qualified; however, it operates across –40°C to +125°C junction temperature and includes automotive-relevant features (UVLO, thermal shutdown, 16V input support), making it suitable for non-safety-critical automotive body electronics when validated per system-level requirements.
TPS77018DBVRG4 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):
- 1.8V
- 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
TPS77018DBVRG4 FAQ
1.How can I place an order for TPS77018DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77018DBVRG4 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 TPS77018DBVRG4 reliable?
The price and inventory of TPS77018DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77018DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS77018DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77018DBVRG4 transactions.
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4.How is shipping managed for TPS77018DBVRG4?
TPS77018DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77018DBVRG4 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 TPS77018DBVRG4?
For technical support, including TPS77018DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77018DBVRG4 requirements.
6.How does Aetrix verify that TPS77018DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS77018DBVRG4 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 TPS77018DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS77018DBVRG4?
All TPS77018DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS77018DBVRG4, 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 TPS77018DBVRG4 part is unused and in its original packaging.
Return procedure for TPS77018DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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