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Texas Instruments TPS79901DDCRG4
- Part No.:
- TPS79901DDCRG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS79901DDCRG4.pdf
- Description:
- IC REG LIN POS ADJ 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,984
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Product details
Overview
TPS79901DDCRG4 from Texas Instruments is a 200-mA, ultra-low-noise, high-PSRR low-dropout linear regulator with fixed 3.0-V output, 40-μA quiescent current, 100-mV dropout at 200 mA, and ±2% total output accuracy across –40°C to +125°C. It delivers stable power to noise-sensitive RF and precision analog circuits in space-constrained portable devices.
For engineers reviewing the TPS79901DDCRG4 datasheet, TPS79901DDCRG4 pinout, TPS79901DDCRG4 application, or TPS79901DDCRG4 equivalent, this device is selected for its combination of ultralow output noise (10.5 × VOUT μVRMS), 66 dB PSRR at 1 kHz, inrush-current-protected enable toggle, and compatibility with 2.2-μF ceramic output capacitance - critical for VCO biasing, WLAN front-end ICs, and wearable sensor rails.
Technical Context
The TPS79901DDCRG4 uses a PMOS pass element and precision 1.193-V internal reference with feedback loop compensation optimized for stability with ≥2-μF low-ESR ceramic capacitors. Its high-gain error amplifier enables 66 dB PSRR at 1 kHz and fast transient response via active pulldown (350-Ω equivalent) during >5% output overshoot.
It integrates undervoltage lockout (UVLO with 70-mV hysteresis), thermal shutdown (165°C trip), and inrush current limiting activated on EN toggle - all operating across –40°C to +125°C junction temperature. The NR pin supports external 0.01-μF bypass to suppress bandgap noise and reduce total output noise to 10.5 × VOUT μVRMS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.0 V, ±2% over load, line, and temperature - ensures stable bias for RF synthesizers without external feedback tuning. |
| Max output current | 200 mA - sufficient to power single-chip Bluetooth® SoCs or dual-channel ADCs with margin. |
| Quiescent current | 40 μA typical - enables multi-year battery life in always-on wearable sensors. |
| Dropout voltage | 100 mV at 200 mA - allows operation from 3.1-V input when VOUT = 3.0 V, maximizing battery utilization. |
| PSRR | 66 dB at 1 kHz, 51 dB at 10 kHz - rejects switching noise from adjacent DC/DC converters feeding RF sections. |
| Output noise | 10.5 × VOUT μVRMS (10 Hz–100 kHz, CNR = 0.01 μF) - meets phase noise requirements for VCOs and PLLs. |
| Accuracy | ±2% over full temperature and load range - eliminates need for post-regulation trimming in production calibration. |
Pinout & Package
TPS79901DDCRG4 is packaged in a 5-pin SOT-23-THIN (DDC) measuring 2.90 mm × 1.60 mm, with exposed pad not present. This thermally enhanced, low-profile package supports reflow-compatible assembly and fits tight PCB layouts in handheld RF modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.7–6.5 V input; minimum headroom defined by dropout voltage - must exceed 3.1 V for reliable 3.0-V output at full load. |
| 2 - GND | Power ground reference | Primary return path for load and quiescent current; requires low-impedance PCB plane connection to maintain PSRR and noise performance. |
| 3 - EN | Enable control input | Active-high TTL/CMOS-compatible signal; drives regulator ON above 1.2 V, OFF below 0.4 V - enables power sequencing in multi-rail systems. |
| 4 - NR | Noise reduction terminal | Connects to 0.01-μF capacitor to shunt bandgap reference noise; reduces output noise to 10.5 × VOUT μVRMS and improves PSRR. |
| 5 - OUT | Regulated output | Delivers 3.0 V ±2%; requires ≥2.2-μF ceramic capacitor (X5R/X7R) to ground for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Inrush current protection | Activated on EN toggle start-up - clamps peak inrush to prevent input rail collapse during simultaneous power-up of multiple LDOs. |
| Overshoot detection & pulldown | Engages 350-Ω active pulldown when VOUT exceeds nominal by >5%, suppressing startup overshoot without external components. |
| Stability with low-ESR ceramics | Guaranteed stable with ≥2.2-μF X5R/X7R capacitors (ESR < 1.0 Ω) - eliminates need for tantalum or polymer alternatives in cost-sensitive designs. |
| Ultra-low noise architecture | Bandgap noise bypassed via NR pin; total output noise reduced to 10.5 × VOUT μVRMS - suitable for sub-100-fs jitter clock distribution. |
| Wide temperature operation | Fully specified from –40°C to +125°C junction - qualified for automotive infotainment power rails and industrial wireless sensor nodes. |
Applications
| RF Power Amplifier Bias | VCO/PLL Core Supply |
|---|---|
Use Scenario: Providing clean, stable 3.0-V bias to GaAs pHEMT power amplifiers in 2.4-GHz Wi-Fi 6 front-end modules. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated VPA rail with minimal AM-to-PM distortion and carrier leakage. Use Value: 66 dB PSRR at 1 kHz suppresses switching noise from adjacent buck converters, maintaining EVM < 3% at 1024-QAM. |
Use Scenario: Supplying core voltage to fractional-N synthesizers in Bluetooth® LE audio transceivers. IC Role / Device Role / Timing Role: Ultra-low-noise 3.0-V source for VCO tuning and divider logic, directly impacting integrated phase noise. Use Value: 10.5 × VOUT μVRMS output noise contributes < 0.5° RMS jitter to 24-MHz reference clocks, enabling < 40-ppm timing accuracy. |
| Wearable Sensor Hub Rail | Industrial IoT Edge Node MCU Core |
Use Scenario: Powering ultra-low-power optical heart-rate monitor ASICs in fitness bands with coin-cell batteries. IC Role / Device Role / Timing Role: Primary 3.0-V system rail with 40-μA IQ, supporting always-on photodiode signal chain and BLE advertising intervals. Use Value: 200-mA capability and 100-mV dropout extend usable battery voltage down to 3.1 V, adding >12% runtime vs. higher-IQ alternatives. |
Use Scenario: Regulating 3.0-V supply for ARM Cortex-M4 microcontrollers in DIN-rail-mounted condition monitoring gateways. IC Role / Device Role / Timing Role: Main I/O and analog subsystem regulator, operating continuously across –40°C to +85°C ambient. Use Value: ±2% accuracy over temperature eliminates software-based VREF calibration, reducing firmware complexity and BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F30-DBVR | 200-mA, 3.0-V fixed, 25-μA IQ, 55 dB PSRR @ 1 kHz, requires 1-μF min COUT | Lower IQ but reduced PSRR and noise performance - suitable only where RF isolation is less critical. | Select when battery life is primary concern and RF coexistence is managed at board level. |
| LP5907MFX-3.0/NOPB | 250-mA, 3.0-V fixed, 250-μA IQ, 70 dB PSRR @ 100 Hz, 25 μVRMS noise, 1-μF COUT stable | Higher IQ and lower PSRR above 1 kHz - trades noise for faster transient response in digital load scenarios. | Select for mixed-signal SoCs with burst-mode CPU loads where 100-Hz ripple rejection dominates. |
Compared with TPL720F30-DBVR and LP5907MFX-3.0/NOPB, the TPS79901DDCRG4 uniquely balances ultralow noise (10.5 × VOUT μVRMS), high mid-frequency PSRR (66 dB @ 1 kHz), and 40-μA IQ - making it the only option qualified for simultaneous VCO biasing and battery-powered operation in compact RF modules.
Availability
TPS79901DDCRG4 is available at Aetrix Electronics and suitable for RF front-end power, wearable sensor biasing, and industrial edge node MCU core supply requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS79901DDCRG4 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 and embedded processing chips for industrial, automotive, and communications markets, with over 50 years of power management innovation.
The TPS799 product line targets noise-critical RF and precision analog applications, delivering high PSRR, ultralow noise, and low IQ in miniature packages for space-constrained wireless and portable electronics.
FAQ
What is the output voltage tolerance of the TPS79901DDCRG4 over temperature and load?
The TPS79901DDCRG4 maintains ±2% output voltage accuracy across the full operating junction temperature range (–40°C to +125°C), input voltage (2.7 V to 6.5 V), and output load (500 μA to 200 mA). This specification includes initial tolerance, line regulation, load regulation, and thermal drift - eliminating need for post-production calibration in most applications.
Can the TPS79901DDCRG4 operate with a 2.2-μF ceramic output capacitor?
Yes, the TPS79901DDCRG4 is explicitly designed and tested for stability with a minimum 2.2-μF ceramic output capacitor (X5R or X7R dielectric, ESR < 1.0 Ω). This value satisfies both small-signal stability and transient response requirements per TI's SBVS056L datasheet Section 6.5 and Figure 6-20.
What is the purpose of the NR pin on the TPS79901DDCRG4?
The NR (Noise Reduction) pin on the TPS79901DDCRG4 connects to an external 0.01-μF capacitor to bypass noise from the internal bandgap reference. When used, it reduces total output noise to 10.5 × VOUT μVRMS (10 Hz–100 kHz) and improves PSRR - essential for powering VCOs and high-resolution ADCs.
Does the TPS79901DDCRG4 include thermal protection?
Yes, the TPS79901DDCRG4 integrates thermal shutdown protection that activates at +165°C junction temperature and resets at +145°C. This feature prevents permanent damage during sustained overload or poor PCB thermal design, and is fully characterized across –40°C to +125°C operating range.
How does the enable function work on the TPS79901DDCRG4?
The EN pin on the TPS79901DDCRG4 is active-high: driving it above 1.2 V enables regulation, while pulling it below 0.4 V places the device in shutdown mode with 150-nA typical quiescent current. If unused, EN may be tied directly to IN - no external pull-up is required.
TPS79901DDCRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 6.5V
- Voltage Dropout (Max):
- 0.18V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 38dB (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-23-THIN
TPS79901DDCRG4 FAQ
1.How can I place an order for TPS79901DDCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79901DDCRG4 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 TPS79901DDCRG4 reliable?
The price and inventory of TPS79901DDCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79901DDCRG4 is usually 5 days.
3.What payment methods are accepted for TPS79901DDCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79901DDCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79901DDCRG4?
TPS79901DDCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79901DDCRG4 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 TPS79901DDCRG4?
For technical support, including TPS79901DDCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79901DDCRG4 requirements.
6.How does Aetrix verify that TPS79901DDCRG4 is sourced from the original manufacturer or authorized distributors?
All TPS79901DDCRG4 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 TPS79901DDCRG4 meets industry standards.
7.What is the process for return or replacement of TPS79901DDCRG4?
All TPS79901DDCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS79901DDCRG4, 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 TPS79901DDCRG4 part is unused and in its original packaging.
Return procedure for TPS79901DDCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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