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Texas Instruments TPS71533QDCKRM3Q1
- Part No.:
- TPS71533QDCKRM3Q1
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS71533QDCKRM3Q1.pdf
- Description:
- AUTOMOTIVE, 50MA 24V ULTRA-LOW-I
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
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Product details
Overview
TPS71533QDCKRM3Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator delivering fixed 3.3 V output at up to 50 mA, with 3.2 μA typical quiescent current, 2.5 V to 24 V input range, and stable operation with ≥0.47 μF output capacitance - designed for battery-powered microcontrollers in powertrain and body electronics.
For engineers reviewing the TPS71533QDCKRM3Q1 datasheet, TPS71533QDCKRM3Q1 pinout, TPS71533QDCKRM3Q1 application, or TPS71533QDCKRM3Q1 equivalent, this page delivers verified electrical specs, SC70-5 package layout, automotive thermal performance data, and real-world selection guidance for low-IQ LDO replacement in safety-critical embedded systems.
Technical Context
The TPS71533QDCKRM3Q1 implements a CMOS pass transistor architecture with internal bandgap reference (1.205 V), leakage-null control circuitry active below 5 μA load, and brick-wall overcurrent protection limiting output to 125–350 mA depending on VIN and chip revision. It operates across –40°C to +125°C ambient with integrated soft-start to suppress inrush current during power-up.
Its dropout voltage is 415 mV (typ) at 50 mA load, scaling linearly with load due to RDS(ON) behavior, and PSRR reaches 60 dB at 100 kHz with 10 μF output capacitor. The device supports both normal regulation and dropout modes, where output tracks input when VIN falls below VOUT + VDO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% over –40°C to +125°C, enabling direct supply to 3.3-V MCU I/O and peripherals without external feedback. |
| Quiescent Current | 3.2 μA typical across full 0–50 mA load range, minimizing battery drain in always-on automotive modules. |
| Input Voltage Range | 2.5 V to 24 V, supporting direct connection to 12-V vehicle batteries including cold-crank (≥6 V) and load-dump (≤24 V) transients. |
| Dropout Voltage | 415 mV typical at 50 mA, allowing regulation down to VIN = 3.715 V while maintaining 3.3 V output - critical for low-voltage brownout resilience. |
| Output Capacitor | Stable with ≥0.47 μF ceramic capacitor (derated), eliminating need for large electrolytics and reducing board area in space-constrained ECUs. |
| Thermal Resistance | RθJA = 195.7°C/W (new chip), enabling 50 mA continuous operation at +85°C ambient with minimal copper pour. |
| ESD Rating | HBM ±3000 V / CDM ±1500 V (new chip), meeting AEC-Q100 stress requirements for assembly and field reliability. |
Pinout & Package
TPS71533QDCKRM3Q1 uses a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density automotive PCBs. Pin 1 is NC (no connect), Pin 2 is GND, Pin 3 is NC, Pin 4 is IN, and Pin 5 is OUT - consistent with fixed-output configuration per TI SGLS272I Rev I.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No-connect terminal | Internally unconnected; recommended to ground for improved thermal dissipation in high-power-density layouts. |
| Pin 2 (GND) | Ground reference | Primary return path for regulator current and feedback reference; must be low-impedance to minimize noise coupling. |
| Pin 3 (NC) | No-connect terminal | Internally unconnected; grounding improves thermal performance but floating is electrically acceptable. |
| Pin 4 (IN) | Input supply | Accepts 2.5–24 V DC; requires ≤0.047 μF input capacitor only for transient suppression, not stability. |
| Pin 5 (OUT) | Regulated output | Delivers 3.3 V ±4% at up to 50 mA; connects directly to load with ≥0.47 μF ceramic capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation, enabling use in engine bay, transmission, and ADAS ECU environments. |
| Ultra-low quiescent current | 3.2 μA typical across full 0–50 mA load range, extending battery life in always-on telematics and gateway modules. |
| Internal soft-start | Controls inrush current into output capacitor, preventing input rail sag and avoiding false resets in downstream MCUs. |
| Brick-wall overcurrent protection | Limits output to 125–350 mA (chip revision dependent), protecting against short-circuit faults without external circuitry. |
| Wide-input, low-dropout operation | Operates from 2.5 V up to 24 V with 415 mV dropout at 50 mA, supporting 12-V battery systems through cold-crank events. |
Applications
| Powertrain Control Unit (PCU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Supplies 3.3 V to microcontroller, CAN transceiver, and sensor interface circuits in engine management systems exposed to wide temperature and voltage transients. IC Role / Device Role / Timing Role: Primary low-noise, low-IQ power rail for MCU core and peripherals - replaces discrete regulators requiring external components. Use Value: Maintains regulation during 6–24 V battery swings and –40°C to +125°C ambient, eliminating need for secondary buck stages. |
Use Scenario: Powers door module MCUs, LED drivers, and LIN transceivers in interior lighting and window control subsystems. IC Role / Device Role / Timing Role: Standby power source with ultra-low quiescent current, enabling <10 μA system sleep current compliance. Use Value: Enables >1-year battery life in keyless entry receivers and occupancy sensors using coin-cell or backup battery sources. |
| Instrument Cluster Display | Infotainment System MCU Core |
Use Scenario: Provides clean 3.3 V bias to TFT display controller, touch IC, and backlight driver in digital dashboards. IC Role / Device Role / Timing Role: Low-noise post-regulator after main DC/DC converter, suppressing switching ripple from upstream power stages. Use Value: Achieves 425 μVrms output noise (new chip), preventing visual artifacts and flicker in high-resolution displays. |
Use Scenario: Supplies 3.3 V to application processor I/O banks and peripheral interfaces in head-unit designs. IC Role / Device Role / Timing Role: Dedicated LDO for noise-sensitive analog and communication peripherals (USB PHY, audio codec). Use Value: Delivers 60 dB PSRR at 100 kHz, attenuating switching noise from 5-V buck converters powering the same board. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS71533QDCKRQ1 | Legacy chip version with higher quiescent current (up to 4.8 μA), lower CDM ESD rating (±500 V), and 750-mV max dropout. | Suitable for legacy designs already qualified to older AEC-Q100 test conditions; not recommended for new designs targeting extended thermal margin. | Select TPS71533QDCKRM3Q1 for new designs requiring lowest IQ, highest ESD robustness, and tightest dropout spec. |
| TLV70733PDQNR | Lower max input (5.5 V), higher IQ (25 μA), smaller X2SON-4 package (1.0 mm × 1.0 mm), no AEC-Q100 qualification. | Applicable only in low-voltage, non-automotive contexts (e.g., consumer IoT); lacks automotive temp range and ESD ratings. | Use TLV70733PDQNR only in cost- or size-constrained non-automotive applications where 24-V input and Grade 1 operation are unnecessary. |
Compared with TPS71533QDCKRQ1, the M3 version offers tighter quiescent current control and enhanced ESD immunity; compared with TLV70733PDQNR, it provides 24-V capability, automotive qualification, and 8× lower IQ - making TPS71533QDCKRM3Q1 the sole fit for demanding automotive LDO roles.
Availability
TPS71533QDCKRM3Q1 is available at Aetrix Electronics and suitable for hybrid powertrain control, body electronics modules, and infotainment systems requiring stable component supply across extended automotive lifecycles.
Supply support for TPS71533QDCKRM3Q1 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 automotive-grade power management ICs, with decades of automotive qualification expertise.
The TPS715-Q1 product line was engineered specifically for ultra-low-power, wide-input automotive LDO applications - targeting battery-backed modules, always-on ECUs, and noise-sensitive MCU peripherals in harsh environments.
FAQ
What is the maximum input voltage rating for TPS71533QDCKRM3Q1?
The TPS71533QDCKRM3Q1 has an absolute maximum input voltage of 30 V for the new chip (M3) revision, with recommended operating range from 2.5 V to 24 V. This allows direct connection to 12-V automotive batteries during load-dump events while maintaining safe operation margins. Exceeding 30 V risks permanent damage per TI SGLS272I Rev I Absolute Maximum Ratings table.
Does TPS71533QDCKRM3Q1 require an input capacitor for stability?
No, the TPS71533QDCKRM3Q1 does not require an input capacitor for stability - its internal design is inherently stable without CIN. However, TI recommends a 0.047 μF ceramic capacitor at the IN pin to suppress high-frequency ringing caused by source inductance during load transients, especially in long-trace or high-impedance supply paths.
What is the output voltage accuracy of TPS71533QDCKRM3Q1 over temperature?
The TPS71533QDCKRM3Q1 maintains output voltage accuracy of ±4% over the full –40°C to +125°C junction temperature range, as specified in the Electrical Characteristics table. This tolerance includes initial accuracy, line regulation (20–22 mV), and load regulation (22 mV), ensuring reliable 3.3-V operation for automotive MCUs across all environmental conditions.
How does the internal soft-start function in TPS71533QDCKRM3Q1?
The TPS71533QDCKRM3Q1 incorporates an internal soft-start circuit that gradually ramps the output voltage during power-up, limiting inrush current into the output capacitor. This prevents input rail collapse and avoids false resets in downstream microcontrollers - a critical feature for automotive systems where multiple LDOs power up simultaneously from shared battery rails.
Is TPS71533QDCKRM3Q1 pin-compatible with earlier TPS71533-Q1 variants?
Yes, TPS71533QDCKRM3Q1 is pin-compatible with other SC70-5 fixed-output variants including TPS71533QDCKRQ1 and TPS71533QDBVRQ1. All share identical 5-pin DCK footprint, pin 1–3 NC/GND/NC assignment, pin 4 IN, and pin 5 OUT - enabling drop-in replacement without PCB modification when upgrading to the M3 revision.
TPS71533QDCKRM3Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 5.8 mA
- Current - Supply (Max):
- 5.8 mA
- PSRR:
- 60dB (100kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS71533QDCKRM3Q1 FAQ
1.How can I place an order for TPS71533QDCKRM3Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71533QDCKRM3Q1 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 TPS71533QDCKRM3Q1 reliable?
The price and inventory of TPS71533QDCKRM3Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71533QDCKRM3Q1 is usually 5 days.
3.What payment methods are accepted for TPS71533QDCKRM3Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71533QDCKRM3Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71533QDCKRM3Q1?
TPS71533QDCKRM3Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71533QDCKRM3Q1 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 TPS71533QDCKRM3Q1?
For technical support, including TPS71533QDCKRM3Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71533QDCKRM3Q1 requirements.
6.How does Aetrix verify that TPS71533QDCKRM3Q1 is sourced from the original manufacturer or authorized distributors?
All TPS71533QDCKRM3Q1 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 TPS71533QDCKRM3Q1 meets industry standards.
7.What is the process for return or replacement of TPS71533QDCKRM3Q1?
All TPS71533QDCKRM3Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS71533QDCKRM3Q1, 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 TPS71533QDCKRM3Q1 part is unused and in its original packaging.
Return procedure for TPS71533QDCKRM3Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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