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Texas Instruments TPS79625DCQR
- Part No.:
- TPS79625DCQR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TPS79625DCQR.pdf
- Description:
- IC REG LINEAR 2.5V 1A SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,520
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Product details
Overview
TPS79625DCQR from Texas Instruments is a fixed-output 2.5 V, 1 A ultra-low-noise LDO linear regulator in SOT-223-6 package, featuring 220 mV typical dropout at full load, 78 µVRMS output noise (new chip), and stable operation with only 1 µF ceramic output capacitor. It delivers high PSRR (>74 dB at 100 Hz, 1 A) and fast transient response for RF-sensitive analog power rails in portable transceivers and precision ADC/DAC supplies.
For engineers reviewing the TPS79625DCQR datasheet, TPS79625DCQR pinout, TPS79625DCQR application, or TPS79625DCQR equivalent, this page provides verified package mapping (SOT-223-6), confirmed pin functions (EN/IN/GND/OUT/NR/FB), measured noise performance (78 µVRMS, 10 Hz–100 kHz), thermal shutdown thresholds (170 °C trip), and validated alternatives with documented functional differences.
Technical Context
The TPS79625DCQR implements a PMOS pass transistor architecture with high-gain error amplifier and integrated UVLO (1.28 V rising threshold, 130 mV hysteresis) to ensure reliable startup under low-input conditions. Its noise-reduction (NR) pin accepts an external bypass capacitor to suppress bandgap reference noise and improve PSRR beyond 100 kHz.
It features active discharge via internal pulldown MOSFET (RPULLDOWN = 100 Ω) during shutdown and hybrid brick-wall/foldback current limiting (ICL = 1.04–1.65 A, ISC = 550 mA) to protect against sustained overloads while maintaining thermal safety up to 125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.0% over 0–1 A load and –40°C to +125°C, enabling direct replacement of legacy 2.5 V LDOs without feedback resistor recalibration. |
| Dropout Voltage | 220 mV (typ) at 1 A load, allowing regulation from 2.725 V input - critical for battery-powered systems operating near end-of-life voltage. |
| Output Noise | 78 µVRMS (10 Hz–100 kHz, new chip), measured with 1 µF COUT; supports low-phase-noise RF synthesizers and high-resolution SAR ADCs. |
| PSRR | 74 dB at 100 Hz / 1 A, 49 dB at 10 kHz / 1 A - suppresses switching regulator ripple upstream of sensitive analog stages. |
| Start-up Time | 550 µs (new chip, COUT = 1 µF), achieved via internal soft-start; avoids output overshoot during power sequencing. |
| Thermal Shutdown | Trips at 170 °C (rising), resets at 155 °C (falling); prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Enable Threshold | VEN(HI) = 0.85×VIN (min), VEN(LOW) = 0.425×VIN (max) - compatible with 1.8 V and 3.3 V logic-level control signals. |
Pinout & Package
SOT-223-6 (DCQ) package with exposed thermal pad (pin 3/tab) for enhanced heat dissipation; 6.5 mm × 7.06 mm footprint; JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high digital control: drives regulator ON when >0.85×VIN; ties to IN if unused; enables power sequencing in multi-rail systems. |
| 2 - IN | Input supply | Accepts 2.7–6.0 V DC; requires ≥2.2 µF input ceramic capacitor for stability and EMI filtering. |
| 3 - GND / Tab | Power ground & thermal path | Internal connection to exposed thermal pad; must be soldered to large copper pour for RθJB = 8.8 °C/W performance. |
| 4 - OUT | Regulated output | Delivers 2.5 V ±2% at up to 1 A; stable with ≥1 µF ceramic COUT; connects directly to load IC VCC pins. |
| 5 - NR | Noise reduction | Bypasses internal bandgap noise; 0.001–0.1 µF capacitor reduces output noise by up to 38 µVRMS (vs no NR cap). |
| 6 - FB/NC | Feedback / No-connect | Internally tied to 2.5 V reference for fixed-output version; leave unconnected - not used in TPS79625DCQR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 78 µVRMS (10 Hz–100 kHz) enables clean power for RF front-ends and 16+ bit precision data converters without additional LC filtering. |
| High PSRR at low headroom | 74 dB rejection at 100 Hz with only 220 mV VIN–VOUT margin - maintains signal integrity when powered from noisy intermediate rails. |
| Fast transient response | Load step recovery <100 µs (1 A step), minimizing voltage droop during burst-mode processor activity or ADC sampling events. |
| Active output discharge | 100 Ω internal pulldown discharges VOUT rapidly on disable - eliminates hold-up time in hot-swap and power-domain isolation applications. |
| Robust protection suite | Integrated thermal shutdown (170 °C), foldback current limit (550 mA short-circuit), and UVLO (1.28 V) prevent failure under fault conditions without external components. |
Applications
| Portable RF Transceivers | High-Resolution Data Acquisition |
|---|---|
Use Scenario: Powering VCOs, PLLs, and LNA bias rails in handheld radios and IoT edge nodes where battery voltage sags below 3 V. IC Role / Device Role / Timing Role: Low-noise, low-dropout post-regulator delivering stable 2.5 V to RF synthesis blocks. Use Value: 78 µVRMS noise and 74 dB PSRR suppress phase noise degradation and spurious emissions caused by supply ripple. | Use Scenario: Supplying reference buffers and SAR ADC analog front-ends in industrial sensors and medical instrumentation. IC Role / Device Role / Timing Role: Precision analog power source with tight output accuracy (±2%) across temperature and load. Use Value: Output voltage drift <±0.5% from –40°C to +125°C ensures consistent LSB weighting and measurement repeatability. |
| Automotive Infotainment Processors | Home Theater Audio DACs |
Use Scenario: Providing clean 2.5 V core voltage to application processors and GPU subsystems in vehicle head units. IC Role / Device Role / Timing Role: High-current LDO decoupling switching regulator outputs to reduce conducted EMI into audio/video signal paths. Use Value: 220 mV dropout allows operation down to 2.725 V input - extends runtime during cold-crank battery dips to 6 V system voltage. | Use Scenario: Biasing delta-sigma modulators and headphone amplifiers in premium AV receivers and soundbars. IC Role / Device Role / Timing Role: Ultra-low-noise analog rail generator isolated from digital switching noise. Use Value: 1 µF ceramic stability eliminates need for bulky tantalum capacitors - reduces board area and improves long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A9125DRVR | Lower noise (4.7 µVRMS), higher PSRR (≥80 dB to 10 MHz), but 500 mA max output current and 1.8–6.5 V input range. | Preferred for ultra-low-noise RF and metrology applications where 1 A current is not required. | Select when noise budget is sub-10 µVRMS and load current ≤500 mA; requires redesign for lower current capability. |
| LP5907MFX-2.5/NOPB | 250 mA output, 12 µVRMS noise, 1.8–5.5 V input, but no NR pin or active discharge; smaller SOT-23-5 package. | Suitable for low-power sensor nodes and wearables where size and quiescent current (<20 µA) dominate over current capability. | Choose for space-constrained designs with <250 mA loads; lacks TPS79625DCQR's thermal robustness and fast transient response. |
Compared with TPS79625DCQR, TPS7A9125DRVR offers superior noise/PSRR at half the current rating, while LP5907MFX-2.5/NOPB trades current and protection features for minimal footprint and quiescent current - making each alternative optimal only within its defined current and noise envelope.
Availability
TPS79625DCQR is available at Aetrix Electronics and suitable for automotive infotainment, industrial data acquisition, and portable RF communication systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS79625DCQR 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 for mission-critical applications.
The TPS796 family was engineered specifically for RF and precision analog systems demanding simultaneous ultra-low noise, high PSRR, fast transient response, and robust thermal/current protection - targeting wireless infrastructure, test equipment, and high-fidelity audio.
FAQ
What is the maximum input voltage rating for the TPS79625DCQR?
The TPS79625DCQR has an absolute maximum input voltage of 6.5 V for the new chip revision. Operating above this risks permanent damage. The recommended maximum continuous input is 6.0 V, and minimum input is 2.7 V to maintain regulation at full 1 A load. Always observe derating curves in the datasheet for thermal limits at elevated ambient temperatures.
Does the TPS79625DCQR require an external noise-reduction capacitor to achieve its specified 78 µVRMS noise?
No - the 78 µVRMS noise specification for the TPS79625DCQR (new chip) is measured with only a 1 µF output capacitor and no external NR capacitor. However, adding a 0.01 µF capacitor to the NR pin further reduces noise to ~41 µVRMS. The NR pin is functional and recommended for applications demanding sub-50 µVRMS performance.
Can the TPS79625DCQR be used with a 1 µF ceramic output capacitor?
Yes - the TPS79625DCQR is explicitly characterized and guaranteed stable with a minimum 1 µF ceramic output capacitor, unlike many older LDOs requiring ≥10 µF. This enables compact, high-reliability designs using X7R/X5R MLCCs without ESR constraints or tantalum dependencies.
What is the purpose of the FB/NC pin on the TPS79625DCQR?
The FB/NC pin (pin 6) on the TPS79625DCQR is a no-connect terminal. It is internally tied to the 2.5 V reference and serves no external function in this fixed-output variant. It must be left floating - connecting it to any potential violates the device's internal topology and may cause regulation failure or instability.
How does the active discharge feature operate on the TPS79625DCQR during shutdown?
When the EN pin is pulled low, the TPS79625DCQR activates an internal 100 Ω pulldown MOSFET between OUT and GND, discharging the output capacitor rapidly. This prevents residual voltage from interfering with downstream logic states or causing latch-up in powered-off sections of the system - critical for safe power-domain sequencing.
TPS79625DCQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-223-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 385 µA
- Current - Supply (Max):
- -
- PSRR:
- 59dB ~ 42dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-6
TPS79625DCQR FAQ
1.How can I place an order for TPS79625DCQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79625DCQR 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 TPS79625DCQR reliable?
The price and inventory of TPS79625DCQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79625DCQR is usually 5 days.
3.What payment methods are accepted for TPS79625DCQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79625DCQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79625DCQR?
TPS79625DCQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79625DCQR 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 TPS79625DCQR?
For technical support, including TPS79625DCQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79625DCQR requirements.
6.How does Aetrix verify that TPS79625DCQR is sourced from the original manufacturer or authorized distributors?
All TPS79625DCQR 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 TPS79625DCQR meets industry standards.
7.What is the process for return or replacement of TPS79625DCQR?
All TPS79625DCQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS79625DCQR, 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 TPS79625DCQR part is unused and in its original packaging.
Return procedure for TPS79625DCQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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