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Texas Instruments TPS7B8733QKVURQ1
- Part No.:
- TPS7B8733QKVURQ1
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Datasheet:
-
TPS7B8733QKVURQ1.pdf
- Description:
- AUTOMOTIVE 500-MA, 40-V, LOW DRO
- Quantity:
- Payment:
- Shipping:
Inventory:880
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Product details
Overview
TPS7B8733QKVURQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator delivering 3.3V at up to 500mA, with 40V max input, ±0.85% output accuracy, and 475mV max dropout at 450mA - designed for always-on battery-connected systems such as automotive gateways and remote keyless entry modules.
For engineers reviewing the TPS7B8733QKVURQ1 datasheet, TPS7B8733QKVURQ1 pinout, TPS7B8733QKVURQ1 application, or TPS7B8733QKVURQ1 equivalent, this page provides verified package mapping (TO-252-5 KVU), power-good delay configurability, cold-crank transient response (±2% VOUT deviation), thermal shutdown behavior, and functional safety documentation support.
Technical Context
The TPS7B8733QKVURQ1 implements a bandgap-referenced control loop with UVLO hysteresis (230mV), thermal shutdown (175°C trip, 20°C hysteresis), and current limiting (540–780mA). Its architecture minimizes output overshoot during cold-crank recovery via internal compensation.
Power-good functionality uses an open-drain PG pin with internal 10–50kΩ pullup; delay timing is set externally via capacitor on the DELAY pin (1µF typical), enabling programmable reset assertion after startup - distinct from fixed-delay variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±0.85% over line, load, and temperature - enables direct powering of 3.3V MCUs and CAN transceivers without external feedback. |
| Input voltage range | 3V to 40V (42V absolute max) - withstands automotive load dump transients and supports wide battery voltage operation. |
| Max output current | 500mA continuous - sufficient for microcontrollers, sensors, and low-power communication ICs in body electronics. |
| Quiescent current | 17µA typical at light loads - preserves battery life in always-on standby applications like RKE and gateways. |
| Dropout voltage | 475mV max at 450mA - maintains regulation down to VIN = 3.77V, critical during cranking conditions. |
| Line transient response | ±2% VOUT deviation at 1V/µs slew rate - ensures stable supply during fast battery voltage changes in start-stop systems. |
| Power-good delay | Programmable via external capacitor on DELAY pin (e.g., 100nF → 80ms) - enables precise power sequencing with downstream logic. |
Pinout & Package
TPS7B8733QKVURQ1 is packaged in a thermally enhanced 5-pin TO-252 (KVU) with exposed thermal pad soldered to GND plane for 29.7°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input power-supply voltage | Accepts 3V–40V unregulated input; requires ≥0.1µF ceramic capacitor to GND placed adjacent to pin for EMI robustness. |
| PG | Open-drain power-good output | Signals valid regulation when VOUT > 85–95% of nominal; must not be tied directly to VOUT or biased rails. |
| GND | Ground reference | Primary return path; thermal pad must be connected to large GND plane to achieve rated RθJA. |
| DELAY | Power-good delay adjustment | Capacitor-to-GND sets PG assertion time; floating defaults to 100µs fixed delay; connecting to GND increases ground current. |
| OUT | Regulated output voltage | Delivers stable 3.3V; requires ≥2.2µF ceramic output capacitor with ESR ≤2Ω for stability and transient performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient and –40°C to +150°C junction - suitable for under-hood and instrument cluster deployment. |
| Functional safety capability | Documentation available per ISO 26262 for ASIL-B system integration - supports safety analysis and FMEDA reporting. |
| Stable with low-ESR capacitors | Operates reliably with 2.2µF–220µF ceramic output caps (ESR 0.001Ω–2Ω) - eliminates need for tantalum or electrolytic alternatives. |
| UVLO with hysteresis | Turns on at 2.6–2.82V and off at 2.38–2.6V - prevents oscillation during brown-out and ensures clean power-up sequencing. |
| Thermal shutdown protection | Shuts down at 175°C junction temperature with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
Use Scenario: Digital gauge clusters requiring persistent 3.3V supply during vehicle sleep mode and rapid wake-up during ignition. IC Role / Device Role / Timing Role: Primary 3.3V LDO for MCU, display driver, and CAN FD interface - provides regulated rail with cold-crank immunity and power-good signaling for safe boot. Use Value: 17µA quiescent current extends battery life in 14-day key-off drain budgets; ±2% line transient response prevents display corruption during engine cranking. | Use Scenario: Centralized BCM managing door locks, lighting, and window controls with always-on monitoring capability. IC Role / Device Role / Timing Role: Always-on 3.3V regulator for low-power wake-up circuitry and LIN/CAN transceivers - delivers stable voltage despite wide battery swing (6V–16V). Use Value: 40V input rating handles load dump events; programmable PG delay synchronizes MCU initialization with other subsystems post-battery connection. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
Use Scenario: Zonal gateway aggregating Ethernet, CAN, and LIN traffic with secure boot and firmware update capability. IC Role / Device Role / Timing Role: Secondary 3.3V rail for security co-processor and secure memory - powered directly from battery with functional safety documentation support. Use Value: ±0.85% DC accuracy ensures reliable ADC reference for tamper detection; thermal shutdown prevents latch-up during extended high-temp operation. | Use Scenario: Passive entry fob with ultra-low-power RF receiver and wake-on-RF logic requiring sub-20µA standby current. IC Role / Device Role / Timing Role: Standby LDO supplying 3.3V to RF SoC and wake-up comparator - operates continuously from vehicle battery with minimal leakage. Use Value: 17µA IQ meets <25µA total system drain targets; 475mV dropout sustains regulation down to 3.77V VIN during deep discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8750QKVURQ1 | Fixed 5.0V output; identical package, thermal specs, and feature set - differs only in output voltage. | Used where 5V logic or legacy CAN transceivers require higher rail voltage. | Select when system requires 5V instead of 3.3V; pinout and layout are identical - no redesign needed. |
| TLV73333PQDBVRQ1 | Lower IOUT (300mA), lower IQ (2.5µA), smaller SOT-23-5 package; lacks PG/delay features and automotive thermal rating. | Suitable for non-critical interior modules with relaxed transient requirements and space constraints. | Choose for cost-sensitive, space-constrained designs without sequencing or functional safety needs. |
Compared with TPS7B8750QKVURQ1, the TPS7B8733QKVURQ1 offers identical reliability and features but targets 3.3V digital domains; versus TLV73333PQDBVRQ1, it trades ultra-low IQ for higher current, automotive qualification, and integrated power sequencing - making it essential for safety-critical always-on systems.
Availability
TPS7B8733QKVURQ1 is available at Aetrix Electronics and suitable for automotive gateways, reconfigurable instrument clusters, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS7B8733QKVURQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management ICs.
The TPS7B87-Q1 product line was engineered specifically for battery-connected automotive systems demanding high input voltage tolerance, ultra-low quiescent current, and functional safety compliance - targeting always-on ECUs in ASIL-B environments.
FAQ
What is the maximum input voltage rating for the TPS7B8733QKVURQ1?
The TPS7B8733QKVURQ1 has an absolute maximum input voltage of 42V, with recommended operating range from 3V to 40V. This allows it to survive automotive load dump transients while maintaining regulation for 3.3V-sensitive loads. Exceeding 42V risks permanent damage per the Absolute Maximum Ratings table.
Does the TPS7B8733QKVURQ1 support programmable power-good delay?
Yes, the TPS7B8733QKVURQ1 supports programmable power-good delay via an external capacitor connected between the DELAY pin and GND. A 100nF capacitor yields ~80ms delay; floating the pin defaults to 100µs. The DELAY pin draws only 1–2µA, minimizing impact on system power budget.
What package type does the TPS7B8733QKVURQ1 use, and how is thermal performance achieved?
The TPS7B8733QKVURQ1 uses the 5-pin TO-252 (KVU) package with exposed thermal pad. Thermal performance relies on soldering the pad to a large copper GND plane - achieving 29.7°C/W RθJA. Without proper thermal pad connection, junction temperature rise may exceed safe limits under 500mA load.
Is the TPS7B8733QKVURQ1 qualified for automotive applications?
Yes, the TPS7B8733QKVURQ1 is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient) and supports junction temperatures up to +150°C. It includes automotive-specific protections: UVLO hysteresis, thermal shutdown with 20°C hysteresis, and ESD ratings of ±2000V HBM - meeting stringent vehicle ECU requirements.
Can the TPS7B8733QKVURQ1 operate with a 2.2µF output capacitor?
Yes, the TPS7B8733QKVURQ1 is stable with a minimum 2.2µF ceramic output capacitor (ESR 0.001Ω–2Ω), as confirmed in the Recommended Operating Conditions and Stability (ESR vs COUT) plot. Using smaller or higher-ESR capacitors risks instability or degraded transient response - especially during load steps.
TPS7B8733QKVURQ1 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
TPS7B8733QKVURQ1 FAQ
1.How can I place an order for TPS7B8733QKVURQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8733QKVURQ1 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 TPS7B8733QKVURQ1 reliable?
The price and inventory of TPS7B8733QKVURQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8733QKVURQ1 is usually 5 days.
3.What payment methods are accepted for TPS7B8733QKVURQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8733QKVURQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8733QKVURQ1?
TPS7B8733QKVURQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8733QKVURQ1 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 TPS7B8733QKVURQ1?
For technical support, including TPS7B8733QKVURQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8733QKVURQ1 requirements.
6.How does Aetrix verify that TPS7B8733QKVURQ1 is sourced from the original manufacturer or authorized distributors?
All TPS7B8733QKVURQ1 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 TPS7B8733QKVURQ1 meets industry standards.
7.What is the process for return or replacement of TPS7B8733QKVURQ1?
All TPS7B8733QKVURQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8733QKVURQ1, 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 TPS7B8733QKVURQ1 part is unused and in its original packaging.
Return procedure for TPS7B8733QKVURQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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