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Texas Instruments TPS71229DRCT
- Part No.:
- TPS71229DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS71229DRCT.pdf
- Description:
- IC REG LIN POS ADJ 250MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS71229DRCT from Texas Instruments is a dual-channel, 250 mA ultra-low-noise LDO voltage regulator with fixed 2.8 V output on Channel 1 and adjustable output on Channel 2. It delivers 125 mV typical dropout at 250 mA, 65 dB PSRR at 10 kHz, and 32 µVRMS output noise (with 0.01 µF NR capacitor), targeting RF-sensitive analog power rails in portable wireless systems.
For engineers reviewing the TPS71229DRCT datasheet, TPS71229DRCT pinout, TPS71229DRCT application, or TPS71229DRCT equivalent, key selection criteria include independent enable control per channel, thermal shutdown and current limiting per LDO, stability with low-ESR 2.2 µF ceramic capacitors, and noise reduction via external NR capacitor-critical for powering RF transceivers, ADCs, and PLLs.
Technical Context
The TPS71229DRCT integrates two independent PMOS-based LDO regulators sharing a common IN and GND but featuring separate EN1/EN2, OUT1/OUT2, and NR pins. Each channel uses a precision 1.225 V internal reference and achieves fast transient response via active pull-down circuitry during load removal.
Channel 1 is factory-fixed to 2.8 V; Channel 2 is adjustable via external FB2 resistor divider. The NR pin connects internally to the reference through a 250 kΩ resistor, enabling programmable noise filtering-output noise scales linearly with VOUT (e.g., 32 µVRMS at 2.8 V with 0.01 µF NR cap).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | Dual independent LDOs: CH1 fixed at 2.8 V, CH2 adjustable (1.2–5.5 V) |
| Max Output Current | 250 mA per channel-supports simultaneous high-current analog/RF loads without cross-regulation |
| Dropout Voltage | 125 mV typical at 250 mA-enables operation from 3.0 V input to deliver stable 2.8 V rail |
| PSRR @ 10 kHz | 65 dB-rejects switching noise from upstream DC/DC converters in mixed-signal systems |
| Output Noise | 32 µVRMS (10 Hz–100 kHz) with 0.01 µF NR capacitor-meets stringent RF receiver supply requirements |
| Startup Time | 60 ms with 0.001 µF NR capacitor-ensures controlled power sequencing in multi-rail systems |
| Operating Temp | -40°C to +125°C junction-qualified for automotive infotainment and industrial edge devices |
Pinout & Package
TPS71229DRCT is housed in a thermally enhanced 10-pin SON package (DRC), measuring 3 mm × 3 mm × 1 mm, with an exposed thermal pad (Pin 5, Pad) for PCB heat dissipation. The package supports JEDEC Level-2 moisture sensitivity and Pb-free NIPDAU finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Unregulated input supply | Accepts 2.7–5.5 V; requires 0.1 µF ceramic bypass to GND for stability and ripple rejection |
| NC (Pin 2) | No connection | Internally unconnected-must be left floating or tied to GND per layout best practice |
| OUT1 (Pin 3) | Fixed 2.8 V LDO output | Stable 2.8 V rail; requires 2.2 µF ceramic capacitor to GND for loop stability |
| OUT2 (Pin 4) | Adjustable LDO output | Programmable 1.2–5.5 V output; same capacitor requirement as OUT1 |
| GND (Pins 5, Pad) | Power and signal ground | Common return path; thermal pad must be soldered to PCB copper for thermal performance |
| NR (Pin 6) | Noise reduction filter node | Connects to 0.01 µF ceramic cap to GND to reduce reference noise-directly lowers output RMS noise |
| FB2/NC (Pin 7) | CH2 feedback / CH1 no-connect | Used only for adjustable CH2; open for fixed-output variants like TPS71229 |
| EN2 (Pin 8) | Active-high enable for CH2 | Drives high (>1.2 V) to activate CH2; low (<0.4 V) disables CH2 and reduces IQ to <0.3 mA |
| FB1/NC (Pin 9) | CH1 feedback / CH2 no-connect | Open for fixed-output CH1; not used in TPS71229 configuration |
| EN1 (Pin 10) | Active-high enable for CH1 | Independent control of 2.8 V rail-enables dynamic power gating in battery-powered systems |
Key Features
| Feature | Design Value |
|---|---|
| Independent enable control | EN1 and EN2 allow staggered startup/shutdown of 2.8 V and adjustable rails-reduces inrush current and enables power-state optimization |
| Thermal shutdown & current limit | Per-channel protection triggers at ~160°C junction and limits output to 400–800 mA-prevents damage during short-circuit or overload |
| Ultra-low noise architecture | 32 µVRMS output noise with NR capacitor meets GSM/UMTS receiver supply specs for phase noise and SNR preservation |
| Stable with low-ESR ceramics | Guaranteed stability with 2.2 µF X5R/X7R ceramic caps-eliminates need for costly tantalum or polymer alternatives |
| Fast transient response | Active pull-down circuit minimizes undershoot during load removal-critical for burst-mode RF transmitters |
Applications
| Cellular Transceiver Power | DSP/FPGA Core Supply |
|---|---|
Use Scenario: Powering RF transceiver ICs (e.g., TRF3705) in 4G LTE handsets requiring clean 2.8 V VCC and programmable bias voltages. IC Role / Device Role / Timing Role: Dual LDO provides isolated, low-noise analog rails-one fixed for PA bias, one adjustable for mixer LO generation. Use Value: 65 dB PSRR at 10 kHz suppresses DC/DC switching noise; 32 µVRMS noise prevents reciprocal mixing and EVM degradation. | Use Scenario: Delivering tightly regulated core voltage to low-power DSPs (e.g., C55x) and FPGA I/O banks in portable audio recorders. IC Role / Device Role / Timing Role: Supplies 2.8 V digital core and adjustable 1.8–3.3 V I/O rails with independent enable for sleep/wake sequencing. Use Value: Independent EN pins enable precise power-state transitions; 125 mV dropout extends battery runtime in 3.0 V Li-ion systems. |
| Wireless LAN Module | Digital Camera Sensor Bias |
Use Scenario: Powering 802.11n WLAN SoCs (e.g., WL1273L) where RF front-end sensitivity demands ultra-clean 2.8 V supply. IC Role / Device Role / Timing Role: CH1 powers RF synthesizer; CH2 supplies adjustable voltage to WLAN baseband processor. Use Value: Channel-to-channel isolation >40 dB prevents coupling between RF and digital domains; NR pin reduces phase noise floor. | Use Scenario: Providing low-noise bias to CMOS image sensors (e.g., OV5640) in compact digital cameras requiring 2.8 V analog and 1.8 V digital rails. IC Role / Device Role / Timing Role: CH1 powers sensor analog block; CH2 supplies programmable digital interface voltage. Use Value: 32 µVRMS noise ensures minimal fixed-pattern noise; 60 ms startup aligns with sensor initialization timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS71247DRCT | Fixed 1.8 V / 2.85 V dual outputs; no adjustable channel | Targeted at systems needing two precise fixed rails (e.g., memory + I/O), not programmable bias | Select when both rails are known and fixed-simplifies BOM and eliminates FB resistors |
| TPS7A3901DRCT | Single 300 mA LDO with 15 µVRMS noise and 80 dB PSRR at 10 kHz; no dual output | Suitable for single-rail ultra-low-noise apps (e.g., precision ADC reference), not dual-rail systems | Choose for higher PSRR/noise performance on one rail; use two units if dual output required |
Compared with TPS71247DRCT and TPS7A3901DRCT, the TPS71229DRCT uniquely balances fixed 2.8 V output with adjustable second channel, enabling flexible biasing while maintaining RF-grade noise and PSRR-ideal for evolving wireless platforms requiring one stable and one tunable rail.
Availability
TPS71229DRCT is available at Aetrix Electronics and suitable for cellular transceivers, wireless LAN modules, and digital camera sensor biasing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TPS71229DRCT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS712xx family was designed specifically for noise-sensitive RF and portable applications, emphasizing dual-channel independence, ultra-low output noise, and high PSRR in a thermally efficient 3 mm × 3 mm SON package.
FAQ
What is the output voltage configuration of the TPS71229DRCT?
The TPS71229DRCT features a dual-output configuration: Channel 1 is factory-trimmed to a fixed 2.8 V output, while Channel 2 is adjustable from 1.2 V to 5.5 V using an external resistor divider on the FB2 pin. This allows one stable RF rail and one programmable bias rail in a single package-ideal for mixed-signal systems where flexibility and precision are both required.
How does the NR pin reduce noise in the TPS71229DRCT?
The NR pin on the TPS71229DRCT connects internally to the 1.225 V reference through a 250 kΩ resistor. Adding a 0.01 µF ceramic capacitor from NR to GND forms a low-pass RC filter that attenuates reference noise, reducing total output noise from ~80 × VOUT mVRMS (no NR cap) to 11.8 × VOUT mVRMS. For the 2.8 V output, this yields 32 µVRMS-critical for preserving SNR in RF receivers.
Can the TPS71229DRCT operate with ceramic output capacitors?
Yes, the TPS71229DRCT is fully stable with low-ESR 2.2 µF ceramic capacitors on both outputs-no tantalum or electrolytic capacitors required. This reduces board area, improves reliability, and lowers cost. The device's internal compensation is optimized for X5R/X7R dielectrics, and stability is guaranteed across -40°C to +125°C with proper PCB layout and grounding.
What protection features does the TPS71229DRCT include?
The TPS71229DRCT integrates per-channel thermal shutdown (trip at ~160°C, reset at ~140°C), output current limiting (400–800 mA), and undervoltage lockout (UVLO activates below 2.25 V). These features protect against overtemperature, short circuits, and brownout conditions-ensuring robust operation in battery-powered and thermally constrained environments without external circuitry.
Is the TPS71229DRCT pin-compatible with other members of the TPS712xx family?
Yes, all TPS712xx devices-including TPS71229DRCT, TPS71247DRCT, and TPS71256DRCT-share identical 10-pin SON (DRC) packaging and pinout. This enables drop-in replacement across fixed/fixed, fixed/adjustable, and adjustable/adjustable variants, simplifying design reuse and inventory management while maintaining identical thermal and layout requirements.
TPS71229DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V (2.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.4V @ 500mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- 600 µA
- PSRR:
- 59dB ~ 54dB (120Hz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS71229DRCT FAQ
1.How can I place an order for TPS71229DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71229DRCT 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 TPS71229DRCT reliable?
The price and inventory of TPS71229DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71229DRCT is usually 5 days.
3.What payment methods are accepted for TPS71229DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71229DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71229DRCT?
TPS71229DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71229DRCT 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 TPS71229DRCT?
For technical support, including TPS71229DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71229DRCT requirements.
6.How does Aetrix verify that TPS71229DRCT is sourced from the original manufacturer or authorized distributors?
All TPS71229DRCT 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 TPS71229DRCT meets industry standards.
7.What is the process for return or replacement of TPS71229DRCT?
All TPS71229DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS71229DRCT, 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 TPS71229DRCT part is unused and in its original packaging.
Return procedure for TPS71229DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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