My Inquiry
My Account
Texas Instruments TPS79228DBVRG4
- Part No.:
- TPS79228DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS79228DBVRG4.pdf
- Description:
- IC REG LINEAR 2.8V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS79228DBVRG4 from Texas Instruments is a fixed-output 2.8 V, 100 mA ultra-low-noise low-dropout linear regulator in SOT-23-5 package, featuring 55 mV typical dropout at full load, 72 dB PSRR at 100 Hz (legacy chip), and 31 µVRMS output noise (100 Hz–100 kHz) with 10 nF NR capacitor - used to power RF front-ends and precision analog circuitry in smartphones and TV applications.
For engineers reviewing the TPS79228DBVRG4 datasheet, TPS79228DBVRG4 pinout, TPS79228DBVRG4 application, or TPS79228DBVRG4 equivalent, key selection criteria include verified 2.8 V output accuracy (±2%), fast 50 µs startup (legacy chip), thermal shutdown behavior, and compatibility with 2.2 µF ceramic output capacitors without external compensation.
Technical Context
The TPS79228DBVRG4 implements a PMOS pass transistor architecture with internal bandgap reference, undervoltage lockout (UVLO) threshold of 2.25–2.65 V (rising), and active-high enable logic requiring ≥1.7 V to activate. It operates across –40°C to +125°C junction temperature with no external feedback network required for fixed-voltage operation.
This legacy-chip variant uses a dedicated Noise Reduction (NR) pin (Pin 4) that accepts an external capacitor to suppress internal reference noise; it does not support active discharge or feed-forward capacitors, and its foldback current limit engages at ~0.4 × VOUT(NOM) = 1.12 V during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.8 V ±2% (2.744–2.856 V) over –40°C to +125°C, enabling direct replacement of 2.8 V rails without resistor divider tuning. |
| Dropout voltage | 55 mV (typ) at 100 mA load - allows operation from 2.855 V input, critical for battery-powered systems near end-of-life. |
| Output noise | 31 µVRMS (100 Hz–100 kHz) with 10 nF NR capacitor - meets stringent spectral purity requirements for RF receivers and ADC reference supplies. |
| PSRR | 72 dB at 100 Hz, 75 dB at 10 kHz (100 mA load) - suppresses switching noise from upstream DC/DC converters in mixed-signal SoC power domains. |
| Startup time | 50 µs with 1 µF output capacitor - supports rapid wake-up sequences in portable devices without compromising transient response. |
| Quiescent current | 250 µA (typ) at 100 mA load - balances low-noise performance with battery runtime in always-on sensor nodes. |
| Enable threshold | VEN(HI) = 1.7 V min, VEN(LOW) = 0.7 V max - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 2.8 mm footprint, single-row 5-pin surface-mount, thermally enhanced with exposed pad (not electrically connected in DBV).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.7–5.5 V input; must be decoupled with ≥0.1 µF ceramic capacitor close to pin. |
| 2 - GND | Regulator ground reference | Common return path for input/output capacitors and load; connects directly to PCB ground plane. |
| 3 - EN | Enable control input | Active-high logic: ≥1.7 V enables regulation; ≤0.7 V disables output and reduces IQ to ≤1 µA. |
| 4 - NR/NC | Noise reduction terminal | Legacy-chip NR pin: connect 1–10 nF capacitor to GND to reduce output noise by up to 30% vs. no capacitor. |
| 5 - OUT | Regulated output | Delivers stable 2.8 V to load; requires ≥2.2 µF X5R/X7R ceramic capacitor with ESR < 100 mΩ for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 31 µVRMS (100 Hz–100 kHz) with 10 nF NR cap - enables clean biasing of LNA stages and high-resolution SAR ADCs. |
| High PSRR at RF frequencies | 75 dB at 10 kHz, 47 dB at 100 kHz - maintains signal integrity in 2.4 GHz Wi-Fi/BT coexistence designs. |
| Stable with small ceramic caps | Works with 2.2 µF output capacitor only - eliminates need for large tantalum or electrolytic bulk caps, saving board space. |
| Integrated UVLO protection | 2.25–2.65 V rising threshold with 100 mV hysteresis - prevents erratic startup during brownout conditions in battery systems. |
| Thermal shutdown | Triggers at ~165°C junction temp, auto-restarts at ~140°C - protects against sustained overload without external circuitry. |
Applications
| Smartphone RF Front-End | TV Tuner Module |
|---|---|
|
Use Scenario: Powers low-noise amplifier (LNA) and mixer stages in 4G/5G cellular front-end modules where supply ripple directly impacts error vector magnitude (EVM). IC Role / Device Role / Timing Role: Primary 2.8 V analog rail regulator with sub-µV/√Hz noise floor and fast transient recovery to maintain RF linearity under burst-mode transmission. Use Value: Enables >35 dB ACLR compliance in LTE Band 1 by suppressing switching noise from adjacent PMIC buck converters. |
Use Scenario: Supplies tuners and demodulators in digital terrestrial TV (DTMB/DVB-T2) set-top boxes operating from 3.3 V or 5 V system rails. IC Role / Device Role / Timing Role: Post-regulator for sensitive IF signal chains, rejecting ripple from upstream switching regulators feeding multiple SoC domains. Use Value: Reduces picture breakup artifacts by maintaining >65 dB carrier-to-noise ratio (C/N) under dynamic load steps from video decoding bursts. |
| Building Automation Sensor Node | Home Theater Audio DAC Supply |
|
Use Scenario: Powers ultra-low-power environmental sensors (temperature/humidity) with integrated 16-bit sigma-delta ADCs in battery-operated HVAC controllers. IC Role / Device Role / Timing Role: Always-on 2.8 V reference rail with <1 µA shutdown current and 50 µs wake-up latency to meet Energy Star standby requirements. Use Value: Extends coin-cell battery life to >5 years while maintaining ADC INL < ±1 LSB across –25°C to +70°C ambient range. |
Use Scenario: Supplies high-fidelity audio DACs (e.g., TI PCM5102A) in premium soundbars and AV receivers where power supply noise modulates audible THD+N floor. IC Role / Device Role / Timing Role: Dedicated low-noise analog supply isolated from noisy digital VDD domains, using NR pin filtering to target <–110 dBV noise floor. Use Value: Achieves measured THD+N of 0.0005% at 1 kHz, meeting RMAA "Excellent" rating for audiophile-grade playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2028PDQNR | Newer generation: 69 µVRMS noise (no NR pin), 500 µs startup, active discharge, 250–1000 µA IQ. | Better suited for systems requiring fast shutdown discharge and wider input range (1.6–6.5 V), but higher noise than TPS79228DBVRG4 with NR cap. | Select TPS7A2028PDQNR when active discharge and lower UVLO (1.32 V) are mandatory; retain TPS79228DBVRG4 for lowest noise in legacy RF designs. |
| MCP1700T-2802E/MB | Microchip 250 mA LDO: 115 µVRMS noise, no NR pin, 6 µA IQ, 1.6–6.0 V input, SOT-23-3 package. | Optimized for ultra-low quiescent current in energy-harvesting nodes, but lacks PSRR >70 dB above 1 kHz and thermal foldback protection. | Choose MCP1700T-2802E/MB only for cost-sensitive, low-frequency sensor rails where noise <50 µVRMS is acceptable and 100 mA load is never approached. |
Compared with TPS7A2028PDQNR and MCP1700T-2802E/MB, the TPS79228DBVRG4 delivers the lowest verified output noise (31 µVRMS) among SOT-23-5 LDOs with NR pin support, making it irreplaceable in RF analog signal chains where spectral purity dominates over quiescent current or startup speed.
Availability
TPS79228DBVRG4 is available at Aetrix Electronics and suitable for smartphone RF front-ends, TV tuner modules, and building automation sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS79228DBVRG4 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS792xx family was engineered specifically for noise-sensitive, battery-powered RF and precision analog applications - prioritizing ultra-low noise, high PSRR, and minimal dropout over raw current capability or digital features.
FAQ
What is the maximum input voltage rating for the TPS79228DBVRG4?
The TPS79228DBVRG4 has an absolute maximum input voltage of 6 V for the legacy chip version. Its recommended operating input range is 2.7 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings in the SLVS337E datasheet. The device's UVLO circuit activates below 2.25 V, ensuring safe startup only within its specified window.
Does the TPS79228DBVRG4 require an external capacitor on the NR pin?
Yes - the TPS79228DBVRG4 is a legacy-chip variant with a functional Noise Reduction (NR) pin (Pin 4). Connecting a 1–10 nF capacitor from NR to GND reduces output noise by up to 30%, achieving the documented 31 µVRMS value. Omitting this capacitor results in higher baseline noise (50 µVRMS), degrading performance in RF-sensitive applications.
Can the TPS79228DBVRG4 be used with a 1 µF output capacitor?
No - the TPS79228DBVRG4 requires a minimum 2.2 µF ceramic output capacitor (X5R/X7R, ≤100 mΩ ESR) for guaranteed stability across temperature and load. Using only 1 µF risks oscillation, especially under light loads or elevated temperatures, as confirmed in Figure 5-32–5-34 stability regions and Section 5.3 Recommended Operating Conditions.
What is the shutdown current of the TPS79228DBVRG4 when EN is pulled low?
When the EN pin is driven below 0.7 V, the TPS79228DBVRG4 enters shutdown mode with a typical ground current of 0.07 µA and maximum of 1 µA over –40°C to +125°C, as specified in Section 5.5 Electrical Characteristics. This ultra-low shutdown current preserves battery life in always-on IoT edge nodes.
Is the TPS79228DBVRG4 pin-compatible with the TPS79228DBVR?
Yes - TPS79228DBVRG4 and TPS79228DBVR share identical SOT-23-5 (DBV) packaging, pinout, and electrical specifications. The "G4" suffix denotes tape-and-reel packaging per TI's standard ordering convention and does not indicate functional or parametric differences. Both part numbers may be substituted on the same PCB layout.
TPS79228DBVRG4 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.11V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 47dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS79228DBVRG4 FAQ
1.How can I place an order for TPS79228DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79228DBVRG4 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 TPS79228DBVRG4 reliable?
The price and inventory of TPS79228DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79228DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS79228DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79228DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79228DBVRG4?
TPS79228DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79228DBVRG4 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 TPS79228DBVRG4?
For technical support, including TPS79228DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79228DBVRG4 requirements.
6.How does Aetrix verify that TPS79228DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS79228DBVRG4 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 TPS79228DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS79228DBVRG4?
All TPS79228DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS79228DBVRG4, 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 TPS79228DBVRG4 part is unused and in its original packaging.
Return procedure for TPS79228DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS79228DBVRG4 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.…
