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Texas Instruments TPS79933QDDCRQ1
- Part No.:
- TPS79933QDDCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS79933QDDCRQ1.pdf
- Description:
- IC REG LINEAR 3.3V 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,980
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Product details
Overview
TPS79933QDDCRQ1 from Texas Instruments is an AEC-Q100 qualified automotive-grade 200-mA low-dropout linear regulator with fixed 3.3-V output, 40-μA quiescent current, 100-mV typical dropout at full load, 29.5-μVRMS output noise, and 66-dB PSRR at 1 kHz - deployed in infotainment power rails and ADAS sensor supply domains.
For engineers reviewing the TPS79933QDDCRQ1 datasheet, TPS79933QDDCRQ1 pinout, TPS79933QDDCRQ1 application, or TPS79933QDDCRQ1 equivalent, key selection criteria include ultra-low noise for RF/analog subsystems, thermal robustness to +125°C, fast 45-μs startup with NR-pin support, and compatibility with 2-μF ceramic output capacitance in space-constrained SOT-23 packaging.
Technical Context
The TPS79933QDDCRQ1 uses a PMOS pass transistor architecture enabling low dropout (100 mV @ 200 mA) while maintaining high PSRR across 100 Hz–1 MHz. Its precision bandgap reference and high-gain error amplifier deliver ±2% total output accuracy over load, line, and temperature (–40°C to +125°C).
A dedicated noise-reduction (NR) pin allows external 0.01-μF capacitor bypassing of internal reference noise, reducing output noise to 29.5 μVRMS. An integrated quick-start circuit charges the NR capacitor within 135 μs, enabling fast 45-μs system startup without compromising noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±1% at TJ = 25°C; ±2% over full operating range (–40°C to +125°C) |
| Max output current | 200 mA continuous - supports mid-power analog/RF ICs like ADCs, transceivers, and camera sensors |
| Quiescent current | 40 μA typical - enables always-on functionality in battery-backed automotive modules |
| Noise (10 Hz–100 kHz) | 29.5 μVRMS with 0.01-μF NR capacitor - meets stringent noise requirements for RF front-ends and precision signal chains |
| PSRR @ 1 kHz | 66 dB - suppresses switching noise from upstream DC/DC converters feeding sensitive analog loads |
| Dropout voltage | 100 mV @ 200 mA - allows operation from 3.4 V input when powering 3.3-V loads, minimizing power loss |
| Enable threshold | VEN(HI) = 1.2 V min - compatible with 1.8-V and 3.3-V logic control signals without level-shifting |
Pinout & Package
TPS79933QDDCRQ1 is packaged in a 5-pin thin SOT-23 (DDC) package measuring 2.9 mm × 2.8 mm, with exposed thermal pad connected internally to GND for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.7–6.5 V input; requires ≥2.7 V or VOUT + VDO (≥3.4 V for 3.3-V output) |
| GND | Power ground reference | Primary return path; thermal pad must be soldered to PCB ground plane for thermal compliance |
| EN | Active-high enable control | Drives regulator ON above 1.2 V; shutdown draws only 0.15 μA - enables low-power sleep modes |
| NR | Noise reduction bypass node | Connects to 0.01-μF capacitor to shunt bandgap reference noise; enables 29.5-μVRMS performance |
| OUT | Regulated output terminal | Delivers stable 3.3 V; requires ≥2-μF ceramic capacitor (X5R/X7R) for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for under-hood and instrument cluster deployments |
| Ultra-low noise with NR pin | 29.5 μVRMS output noise via external 0.01-μF capacitor - eliminates need for post-regulation filtering in RF sections |
| Fast startup with quick-start circuit | 45-μs output rise time enabled by internal 135-μs NR-capacitor charge pulse - critical for wake-from-sleep timing in ADAS |
| High PSRR across wide frequency | 66 dB @ 1 kHz, 51 dB @ 10 kHz - rejects ripple from buck converters powering adjacent high-speed digital blocks |
| Stable with low-ESR ceramics | Guaranteed stability with ≥2-μF X5R/X7R capacitors (ESR < 1 Ω) - simplifies layout and reduces BOM count vs tantalum solutions |
Applications
| Infotainment Power Rail | ADAS Camera Sensor Supply |
|---|---|
|
Use Scenario: Powers audio codec, display driver, and touch controller in head-unit systems requiring clean 3.3-V bias. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying analog front-end circuitry downstream of a noisy buck converter. Use Value: 29.5-μVRMS noise prevents audible artifacts in audio paths; 66-dB PSRR suppresses switching artifacts from 2-MHz DC/DC stages. |
Use Scenario: Supplies image sensor and ISP in forward-facing ADAS cameras operating in extreme ambient temperatures. IC Role / Device Role / Timing Role: High-reliability, thermally robust LDO delivering stable 3.3 V to CMOS image sensors during rapid thermal cycling. Use Value: AEC-Q100 Grade 1 rating ensures operation up to +125°C junction; ±2% accuracy maintains sensor gain calibration across temperature. |
| Telematics LTE Modem Core | Automotive Gateway MCU Core |
|
Use Scenario: Provides regulated 3.3-V supply to LTE baseband processor and RF transceiver in telematics control units. IC Role / Device Role / Timing Role: Low-quiescent-current LDO supporting always-on connectivity with <40-μA standby draw. Use Value: 40-μA IQ extends battery backup runtime; fast 45-μs startup enables rapid network reconnection after ignition cycles. |
Use Scenario: Delivers core voltage to automotive gateway microcontrollers (e.g., S32K series) managing CAN/FlexRay communication. IC Role / Device Role / Timing Role: Precision LDO ensuring stable MCU core voltage despite load transients from bus arbitration and interrupt bursts. Use Value: Excellent load transient response minimizes voltage droop during CAN TX pulses; 100-mV dropout preserves margin on 3.6-V battery inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79933QDRVQ1 | Same electrical specs but in 6-pin WSON-6 (2 mm × 2 mm); includes NC pin and no NR pin - uses FB instead of NR for adjustable versions | WSON offers better thermal resistance (RθJA = 74.2°C/W vs 178.1°C/W) but lacks NR pin - unsuitable for ultra-low-noise fixed-output use cases | Select TPS79933QDRVQ1 only when board space is constrained and thermal performance outweighs noise requirements |
| NCP1117ST33T3G | Industrial-grade (not AEC-Q100), higher IQ (6 mA), higher noise (120 μVRMS), no NR pin, 1.2-V dropout @ 800 mA | Lacks automotive qualification, thermal derating, and noise performance - limited to non-safety-critical cabin modules | Use NCP1117ST33T3G only for cost-sensitive, non-automotive prototypes where AEC-Q100 and ultra-low noise are not required |
Compared with TPS79933QDDCRQ1, the TPS79933QDRVQ1 trades NR-pin noise suppression for superior thermal performance in smaller footprint, while the NCP1117ST33T3G sacrifices automotive reliability and noise performance for lower unit cost - making TPS79933QDDCRQ1 the sole choice for production-grade, noise-sensitive automotive LDO applications.
Availability
TPS79933QDDCRQ1 is available at Aetrix Electronics and suitable for infotainment power rails, ADAS camera sensor supplies, and telematics modem cores requiring stable component supply across automotive production lifecycles.
Supply support for TPS79933QDDCRQ1 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 deep expertise in automotive power management ICs.
The TPS799-Q1 product line delivers ultra-low-noise, high-PSRR LDOs engineered specifically for automotive infotainment, ADAS, and telematics systems demanding AEC-Q100 Grade 1 reliability and precision regulation.
FAQ
What is the maximum input voltage rating for TPS79933QDDCRQ1?
The absolute maximum input voltage for TPS79933QDDCRQ1 is 7 V, but the recommended operating range is 2.7 V to 6.5 V. Operation above 6.5 V risks exceeding safe power dissipation limits and may trigger thermal shutdown. For reliable 3.3-V output, minimum input must be ≥3.4 V to maintain 100-mV dropout headroom - verified per Section 6.3 of the SBVS097G datasheet.
Does TPS79933QDDCRQ1 require an external noise-reduction capacitor to achieve its specified 29.5-μVRMS noise?
Yes - TPS79933QDDCRQ1 achieves 29.5-μVRMS output noise only when a 0.01-μF ceramic capacitor is connected between the NR pin and GND. Without this capacitor, noise rises to ~94×VOUT μVRMS (≈313 μVRMS). The NR pin is specific to fixed-output variants like TPS79933QDDCRQ1 and is not present on adjustable versions.
Can TPS79933QDDCRQ1 be used with a 1-μF output capacitor instead of the recommended 2.2-μF value?
No - TPS79933QDDCRQ1 is only guaranteed stable with ≥2-μF ceramic output capacitance (X5R/X7R, ESR < 1 Ω). Using 1 μF violates the stability condition stated in Section 8.2.2.1 and may cause oscillation or poor transient response. The 2.2-μF value provides sufficient phase margin across –40°C to +125°C and all load conditions.
What is the thermal shutdown behavior of TPS79933QDDCRQ1, and how does it recover?
TPS79933QDDCRQ1 enters thermal shutdown at TJ ≈ 165°C and resumes regulation when TJ cools to ≈145°C. This hysteresis prevents rapid cycling. Recovery is automatic and does not require EN toggling. However, repeated thermal cycling degrades long-term reliability - design must limit steady-state TJ to ≤125°C using PCB copper area and thermal vias per Section 8.4.1.2.
Is TPS79933QDDCRQ1 pin-compatible with other members of the TPS799-Q1 family, such as TPS79918QDDCRQ1?
Yes - all TPS799xxQDDCRQ1 fixed-output variants share identical 5-pin SOT-23 (DDC) pinout and footprint. IN, GND, EN, NR, and OUT positions are identical across voltage options (1.2 V to 4.5 V). This enables drop-in replacement during design iteration or voltage optimization without PCB changes - confirmed in Figure 5-1 and Table 5-1 of the SBVS097G datasheet.
TPS79933QDDCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.16V @ 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS79933QDDCRQ1 FAQ
1.How can I place an order for TPS79933QDDCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS79933QDDCRQ1 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 TPS79933QDDCRQ1 reliable?
The price and inventory of TPS79933QDDCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS79933QDDCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS79933QDDCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS79933QDDCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS79933QDDCRQ1?
TPS79933QDDCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS79933QDDCRQ1 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 TPS79933QDDCRQ1?
For technical support, including TPS79933QDDCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS79933QDDCRQ1 requirements.
6.How does Aetrix verify that TPS79933QDDCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS79933QDDCRQ1 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 TPS79933QDDCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS79933QDDCRQ1?
All TPS79933QDDCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS79933QDDCRQ1, 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 TPS79933QDDCRQ1 part is unused and in its original packaging.
Return procedure for TPS79933QDDCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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