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Texas Instruments TPS7B8733QKVURQ1R2
- Part No.:
- TPS7B8733QKVURQ1R2
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Datasheet:
-
TPS7B8733QKVURQ1R2.pdf
- Description:
- AUTOMOTIVE 500-MA, 40-V, LOW DRO
- Quantity:
- Payment:
- Shipping:
Inventory:1,279
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Product details
Overview
TPS7B8733QKVURQ1R2 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator delivering 3.3V at up to 500mA, with 475mV max dropout at 450mA, ±0.85% output accuracy over line/load/temperature, and integrated power-good with programmable delay. It powers always-on microcontrollers and CAN transceivers in battery-connected automotive systems such as gateways and RKE modules.
For engineers reviewing the TPS7B8733QKVURQ1R2 datasheet, TPS7B8733QKVURQ1R2 pinout, TPS7B8733QKVURQ1R2 application, or TPS7B8733QKVURQ1R2 equivalent, key selection criteria include cold-crank transient response (±2% VOUT deviation), ultra-low 17µA quiescent current, 3V–40V input range, thermal shutdown protection, and compatibility with 2.2µF output capacitors.
Technical Context
The TPS7B8733QKVURQ1R2 implements a bandgap-referenced error amplifier with internal current limiting, UVLO (2.6V rising / 2.38V falling), and thermal shutdown (175°C trip). Its architecture minimizes output overshoot during cold-crank recovery via dynamic loop compensation.
Power-good functionality uses an open-drain PG pin with internal 10–50kΩ pullup and adjustable delay set by external capacitor on the DELAY pin (1.17–1.25V threshold, 1–2µA charging current), enabling precise power sequencing in multi-rail automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±0.85% over –40°C to +125°C ambient, enabling stable supply for precision analog sensors and MCU cores. |
| Max output current | 500mA continuous, supporting high-current automotive peripherals without external boost stages. |
| Dropout voltage | 475mV max at 450mA (KVU package), allowing regulation from 3.77V input - critical for start-stop and cold-crank operation. |
| Quiescent current | 17µA typical at light load, minimizing standby power loss in always-on battery-connected applications. |
| Input voltage range | 3V to 40V (42V absolute max), withstanding automotive load-dump transients and wide battery voltage swings. |
| Power-good delay | Programmable via external capacitor on DELAY pin; default fixed delay is 100µs, enabling flexible system power-up sequencing. |
| Thermal protection | Junction shutdown at 175°C with 20°C hysteresis, preventing permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS7B8733QKVURQ1R2 is packaged in a 5-pin TO-252 (KVU) thermally enhanced surface-mount package with exposed thermal pad, offering 29.7°C/W junction-to-ambient thermal resistance when mounted on a 2oz copper board with adequate GND plane area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input power supply | Accepts 3V–40V unregulated input; requires ≥0.1µF ceramic capacitor to GND placed adjacent to pin for EMI suppression and transient stability. |
| PG | Open-drain power-good indicator | Signals valid regulation when VOUT > 95% of nominal; must be pulled up externally to logic-compatible voltage (≤18V); not internally biased to VOUT. |
| GND | Ground reference | Primary return path for load current and internal bias; connects directly to thermal pad for optimal heat dissipation. |
| DELAY | Power-good delay timing input | Capacitor-connected node setting PG assertion delay; floating = 100µs fixed delay; 1µF = ~80ms delay; voltage threshold 1.17–1.25V. |
| OUT | Regulated output | Delivers 3.3V ±0.85%; requires ≥2.2µF ceramic output capacitor with ESR ≤2Ω for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation and 150°C junction temperature, meeting automotive reliability requirements for body electronics. |
| Ultra-low quiescent current | 17µA typical enables <10µA system standby current when paired with low-IQ downstream ICs - essential for 10-year battery life in RKE fobs. |
| Cold-crank line transient response | ±2% VOUT deviation during 3V/µs VIN slew rate ensures uninterrupted MCU operation during engine cranking events. |
| Programmable power-good delay | External capacitor on DELAY pin allows system-specific sequencing windows (e.g., 10ms for MCU boot, 100ms for RF module wake-up) without firmware changes. |
| Functional safety documentation support | TI provides FIT rate data, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system-level certification. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
Use Scenario: Powering display controllers, touch interface ICs, and backlight drivers in digital dashboards that reconfigure layout based on driving mode or ADAS alerts. IC Role / Device Role / Timing Role: Primary 3.3V rail regulator supplying real-time graphics processors and sensor fusion MCUs with tight DC accuracy and fast load transient response. Use Value: ±0.85% output accuracy prevents display color shift or flicker; 100µs PG delay synchronizes GPU initialization with memory controller power-up. | Use Scenario: Supplying door module microcontrollers, window motor drivers, and LIN transceivers in centralized vehicle body networks. IC Role / Device Role / Timing Role: Always-on LDO powering sleep-mode MCU cores and wake-up interrupt logic while maintaining <20µA total system current. Use Value: 17µA IQ extends battery backup runtime during ignition-off; 40V input withstands jump-start surges without latch-up. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
Use Scenario: Providing regulated 3.3V to multi-protocol gateway SoCs handling CAN FD, Ethernet AVB, and wireless coexistence in Zonal architectures. IC Role / Device Role / Timing Role: Secondary LDO decoupling high-noise communication PHYs from sensitive application processors and security accelerators. Use Value: 70dB PSRR at 1kHz suppresses CAN bus ripple; thermal pad mounting reduces junction temperature rise by >15°C under 450mA load. | Use Scenario: Powering ultra-low-power sub-GHz transceivers and secure authentication ICs in passive entry fobs with 10+ year shelf life. IC Role / Device Role / Timing Role: Standby regulator maintaining RTC, crypto engine, and wake-up receiver during deep-sleep states. Use Value: 17µA IQ enables >12-year battery life with CR2032; programmable PG delay ensures secure key handshake completes before radio activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8750QKVURQ1R2 | Fixed 5.0V output; identical pinout, thermal performance, and feature set. | Used where downstream logic or analog circuitry requires 5V instead of 3.3V - no PCB change needed if voltage rail is interchangeable. | Select when system architecture mandates 5V I/O or legacy peripheral compatibility; same layout and thermal design apply. |
| NCP163ASN330T2G | 3.3V fixed output, 250mA max, 1.8µA IQ, SOT-23-5 package; lacks PG/delay, UVLO, and automotive qualification. | Suitable only for non-automotive, low-current, cost-sensitive consumer applications - not AEC-Q100 qualified. | Choose only for non-automotive prototypes or industrial controls where AEC-Q100, 500mA, or power sequencing are unnecessary. |
Compared with TPS7B8750QKVURQ1R2, the TPS7B8733QKVURQ1R2 offers identical automotive robustness but targets 3.3V logic domains; versus NCP163ASN330T2G, it delivers 2× current, full functional safety support, and guaranteed cold-crank operation - critical for production automotive ECUs.
Availability
TPS7B8733QKVURQ1R2 is available at Aetrix Electronics and suitable for automotive gateways, body control modules, and remote keyless entry systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS7B8733QKVURQ1R2 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 TPS7B87-Q1 product line was designed specifically for battery-connected automotive subsystems demanding ultra-low IQ, high input voltage tolerance, and robust transient immunity - targeting instrument clusters, gateways, and always-on domain controllers.
FAQ
What is the maximum input voltage rating for the TPS7B8733QKVURQ1R2?
The TPS7B8733QKVURQ1R2 has an absolute maximum input voltage rating of 42V, with recommended operating range from 3V to 40V. This allows it to survive automotive load-dump transients while maintaining regulation down to 3.77V input (3.3V + 475mV dropout) during cold-crank conditions. Exceeding 42V risks permanent damage per Absolute Maximum Ratings.
Does the TPS7B8733QKVURQ1R2 require an external capacitor on the DELAY pin?
No - the TPS7B8733QKVURQ1R2 operates with a default 100µs power-good propagation delay when the DELAY pin is left floating. An external capacitor (e.g., 100nF for ~80ms delay) is optional and used only when application-specific power sequencing timing is required. Connecting DELAY to GND increases ground current and is not recommended.
Can the TPS7B8733QKVURQ1R2 be used with ceramic output capacitors smaller than 2.2µF?
No - the TPS7B8733QKVURQ1R2 requires a minimum 2.2µF ceramic output capacitor (with ESR ≤2Ω) for guaranteed stability and transient performance. Using smaller values may cause oscillation or excessive output voltage deviation during load steps. TI's stability curve (Figure 5-36) confirms 2.2µF as the lower bound for safe operation across all COUT ESR values.
What is the power-good threshold accuracy of the TPS7B8733QKVURQ1R2?
The TPS7B8733QKVURQ1R2 has a default power-good rising threshold of 85% to 95% of nominal VOUT (i.e., 2.805V to 3.135V for 3.3V output), with 2% hysteresis. This threshold varies ±0.5% over temperature (–40°C to +125°C), ensuring reliable system reset signaling even under extreme ambient conditions.
Is the TPS7B8733QKVURQ1R2 pin-compatible with other devices in the TPS7B87-Q1 family?
Yes - the TPS7B8733QKVURQ1R2 shares identical 5-pin TO-252 (KVU) pinout and footprint with all fixed-output variants in the TPS7B87-Q1 family, including TPS7B8750QKVURQ1R2 (5.0V) and TPS7B8733QDDARQ1 (3.3V in HSOIC-8). This enables drop-in voltage option changes without PCB redesign.
TPS7B8733QKVURQ1R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.575V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 26 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Power Good
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-5
TPS7B8733QKVURQ1R2 FAQ
1.How can I place an order for TPS7B8733QKVURQ1R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8733QKVURQ1R2 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 TPS7B8733QKVURQ1R2 reliable?
The price and inventory of TPS7B8733QKVURQ1R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8733QKVURQ1R2 is usually 5 days.
3.What payment methods are accepted for TPS7B8733QKVURQ1R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8733QKVURQ1R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8733QKVURQ1R2?
TPS7B8733QKVURQ1R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8733QKVURQ1R2 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 TPS7B8733QKVURQ1R2?
For technical support, including TPS7B8733QKVURQ1R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8733QKVURQ1R2 requirements.
6.How does Aetrix verify that TPS7B8733QKVURQ1R2 is sourced from the original manufacturer or authorized distributors?
All TPS7B8733QKVURQ1R2 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 TPS7B8733QKVURQ1R2 meets industry standards.
7.What is the process for return or replacement of TPS7B8733QKVURQ1R2?
All TPS7B8733QKVURQ1R2 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8733QKVURQ1R2, 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 TPS7B8733QKVURQ1R2 part is unused and in its original packaging.
Return procedure for TPS7B8733QKVURQ1R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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