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Texas Instruments TPS79318DBVRG4
- Part No.:
- TPS79318DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS79318DBVRG4.pdf
- Description:
- IC REG LINEAR 1.8V 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
TPS79318DBVRG4 from Texas Instruments is a fixed-output 1.8 V, 200-mA low-dropout linear regulator with enable and noise-reduction pin, optimized for RF and audio power rails in portable electronics. It delivers 70 dB PSRR at 10 kHz, 32 µVRMS output noise (with 0.1 µF CNR), and 112 mV dropout at 200 mA - enabling stable supply to VCOs, ADCs, and Bluetooth® baseband ICs.
For engineers reviewing the TPS79318DBVRG4 datasheet, TPS79318DBVRG4 pinout, TPS79318DBVRG4 application, or TPS79318DBVRG4 equivalent, this page provides verified specifications, SOT-23-5 pin mapping, real-world transient response data, and validated alternative parts for noise-sensitive LDO selection in battery-powered RF systems.
Technical Context
The TPS79318DBVRG4 uses a PMOS pass transistor architecture with integrated bandgap reference (1.225 V) and undervoltage lockout (UVLO rising threshold 2.65 V). Its feedback loop is internally compensated for stability with ≥2.2 µF ceramic output capacitance, eliminating need for external compensation components.
It features active-high enable (VEN(high) = 1.7 V min), shutdown current <1 µA, and a dedicated NR pin that accepts 0–10 nF capacitor to reduce output noise and improve PSRR above 10 kHz. Thermal shutdown activates at ~165°C and recovers at ~140°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% (1.764–1.836 V) across 0–200 mA load and –40°C to 125°C junction temperature. |
| Max Output Current | 200 mA continuous; internal foldback current limit engages at ~400 mA to protect during short-circuit events. |
| Dropout Voltage | 112 mV at 200 mA (measured at TJ = 25°C, VIN = 1.912 V); enables operation from single Li-ion cell down to ~2.7 V input. |
| PSRR | 70 dB at 10 kHz (VIN = 3.8 V, IOUT = 200 mA, CNR = 0.01 µF); suppresses switching noise from DC/DC converters feeding its input. |
| Output Noise | 32 µVRMS (BW = 200 Hz–100 kHz, CNR = 0.1 µF); meets stringent spectral purity requirements of RF receivers and high-resolution ADCs. |
| Quiescent Current | 170 µA typical (IOUT = 1 mA); reduces battery drain in always-on subsystems such as Bluetooth® standby mode. |
| Startup Time | 50 µs (CNR = 0.001 µF, RL = 14 Ω, COUT = 1 µF); supports fast wake-up sequences in low-power microcontroller applications. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 1.3 mm height, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2.7–5.5 V; must exceed VOUT + VDO and UVLO threshold (2.65 V) for regulation. |
| GND (Pin 2) | Regulator ground reference | Low-impedance return path; requires solid PCB thermal pad connection for thermal performance. |
| EN (Pin 3) | Enable control input | Active-high logic; >1.7 V enables regulation; <0.7 V disables output and reduces IQ to <1 µA. |
| NR (Pin 4) | Noise reduction filter node | Connects external 0.001–0.1 µF capacitor to reduce broadband output noise and improve PSRR above 10 kHz. |
| OUT (Pin 5) | Regulated output | Delivers 1.8 V ±2%; requires ≥2.2 µF X7R/X5R ceramic capacitor (COUT) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 32 µVRMS output noise with 0.1 µF NR capacitor - enables clean power for RF VCOs and 16-bit+ ADCs without post-LDO filtering. |
| High-frequency PSRR | 70 dB rejection at 10 kHz - effectively isolates sensitive analog circuitry from digital switching noise on shared power rails. |
| Fast startup & low IQ | 50 µs turn-on time with 170 µA quiescent current - balances rapid system wake-up with multi-week battery life in portable devices. |
| Stable with small ceramics | Guaranteed stability using ≥2.2 µF X7R/X5R ceramic output capacitor - eliminates need for larger, higher-ESR tantalum or electrolytic caps. |
| Integrated protection | Thermal shutdown (~165°C), UVLO (2.65 V rising), and foldback current limiting - ensures robust operation under fault conditions without external circuitry. |
Applications
| RF Power Management | Portable Audio Systems |
|---|---|
|
Use Scenario: Powering VCOs and low-noise amplifiers in Bluetooth® transceivers and Wi-Fi front-ends. IC Role / Device Role / Timing Role: Ultra-low-noise 1.8 V bias rail generator with high PSRR to prevent phase noise degradation and receiver desensitization. Use Value: 32 µVRMS noise and 70 dB PSRR at 10 kHz directly improve EVM and adjacent-channel rejection in 2.4 GHz ISM-band radios. |
Use Scenario: Supplying DACs, headphone amplifiers, and codec analog sections in wireless earbuds and smart speakers. IC Role / Device Role / Timing Role: Clean, low-dropout voltage source for analog signal chain components requiring minimal power-supply-induced distortion. Use Value: 112 mV dropout allows full 1.8 V output from aging Li-ion cells (≥2.7 V), while low noise preserves SNR in 24-bit audio paths. |
| Cellular Baseband | Handheld PDAs & Organizers |
|
Use Scenario: Regulating core voltage for cellular modem baseband processors during burst transmission modes. IC Role / Device Role / Timing Role: Fast-transient-response LDO delivering stable 1.8 V during high-current CPU/GPU activity spikes up to 200 mA. Use Value: Excellent line/load transient response minimizes voltage droop during 50–200 mA current steps, preventing processor brownouts or reset events. |
Use Scenario: Powering memory interfaces and touch controller ICs in compact handheld organizers with tight board space constraints. IC Role / Device Role / Timing Role: Space-optimized SOT-23-5 regulator providing regulated 1.8 V from single-cell battery with minimal BOM count. Use Value: Nano footprint (2.9 × 1.6 mm) and no external compensation reduce PCB area by >40% vs. traditional LDOs requiring feed-forward capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 200-mA LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79318DBVR | Same silicon, identical electrical specs; G4 suffix indicates enhanced green (lead-free, halogen-free) packaging per TI's legacy eco-labeling. | No functional difference; both qualified for same RF/audio use cases and thermal profiles. | Select TPS79318DBVRG4 when RoHS-6/REACH compliance and TI's green material declaration are required for final product certification. |
| TPS7A20185PDBVR | Lower IQ (6.5 µA typ), lower noise (5.7 µVRMS), but reduced PSRR (42 dB @ 10 kHz) and max IOUT (300 mA). | Better for ultra-low-power always-on sensors; less suitable for RF where PSRR >65 dB at 10 kHz is critical. | Choose TPS7A20185PDBVR only if standby current dominates design priority and RF noise immunity is secondary. |
Compared with TPS79318DBVRG4, the TPS79318DBVR offers identical performance in a non-green package, while TPS7A20185PDBVR trades PSRR for ultra-low IQ - making TPS79318DBVRG4 the optimal choice for RF-sensitive 1.8 V rails demanding balanced noise, PSRR, and transient response.
Availability
TPS79318DBVRG4 is available at Aetrix Electronics and suitable for RF power management, portable audio systems, cellular baseband supplies, and handheld PDA designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS79318DBVRG4 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 and embedded processing technologies, with over 50 years of power management innovation.
The TPS793 family was designed specifically for noise-sensitive, battery-powered RF and audio applications - emphasizing ultralow noise, high PSRR, fast transient response, and minimal solution size in SOT-23 and DSBGA packages.
FAQ
What is the minimum input voltage required for TPS79318DBVRG4 to regulate 1.8 V output?
The TPS79318DBVRG4 requires VIN ≥ 2.7 V per recommended operating conditions. However, to maintain regulation at full 200 mA load, VIN must be ≥ VOUT + VDO = 1.8 V + 0.112 V = 1.912 V. Below 2.7 V, UVLO may disable the device; the actual minimum functional VIN is 2.65 V (UVLO rising threshold), but stable regulation begins at 2.7 V with margin.
Can TPS79318DBVRG4 operate without the NR (noise reduction) capacitor?
Yes, the TPS79318DBVRG4 functions without the NR capacitor, but output noise increases significantly: from 32 µVRMS (with 0.1 µF NR) to 55 µVRMS (with 0.001 µF NR). PSRR above 10 kHz also degrades. For RF or high-precision analog applications, TI specifies 0.01–0.1 µF on NR to achieve datasheet noise and PSRR performance.
Is TPS79318DBVRG4 pin-compatible with other TPS793 variants in SOT-23-5?
Yes - all fixed-output TPS793x8 DBV variants (e.g., TPS79328, TPS79330) share identical SOT-23-5 pinout: IN, GND, EN, NR, OUT. The TPS79318DBVRG4 can be substituted on the same footprint for any 1.8 V requirement, provided input voltage and load conditions remain within spec.
What is the maximum junction temperature rating for TPS79318DBVRG4?
The TPS79318DBVRG4 has a maximum operating junction temperature of 125°C. Thermal shutdown activates at ~165°C (non-destructive protection), but continuous operation above 125°C violates recommended conditions and risks reliability degradation. Derating is required based on RθJA = 225.1°C/W (DBV package) and ambient conditions.
Does TPS79318DBVRG4 require an external feedback resistor network?
No - the TPS79318DBVRG4 is a fixed-output variant with internal feedback divider. External resistors are only required for the adjustable TPS79301. Using TPS79318DBVRG4 eliminates FB pin routing and resistor placement, simplifying layout and reducing BOM count for 1.8 V applications.
TPS79318DBVRG4 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 43dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS79318DBVRG4 FAQ
1.How can I place an order for TPS79318DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79318DBVRG4 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 TPS79318DBVRG4 reliable?
The price and inventory of TPS79318DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79318DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS79318DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79318DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79318DBVRG4?
TPS79318DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79318DBVRG4 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 TPS79318DBVRG4?
For technical support, including TPS79318DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79318DBVRG4 requirements.
6.How does Aetrix verify that TPS79318DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS79318DBVRG4 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 TPS79318DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS79318DBVRG4?
All TPS79318DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS79318DBVRG4, 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 TPS79318DBVRG4 part is unused and in its original packaging.
Return procedure for TPS79318DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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