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Texas Instruments TPS7B8650QKVURQ1R2
- Part No.:
- TPS7B8650QKVURQ1R2
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Datasheet:
-
TPS7B8650QKVURQ1R2.pdf
- Description:
- AUTOMOTIVE 500-MA, 40-V, ULTRA-L
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
TPS7B8650QKVURQ1R2 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade adjustable LDO regulator delivering up to 500mA output current with 1.2V–18V programmable output, 475mV max dropout at 450mA, ±0.85% output accuracy, 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 TPS7B8650QKVURQ1R2 datasheet, TPS7B8650QKVURQ1R2 pinout, TPS7B8650QKVURQ1R2 application, or TPS7B8650QKVURQ1R2 equivalent, key selection criteria include its 3V–40V input range, thermal performance in KVU (TO-252) package, cold-crank transient immunity (±2% VOUT deviation), and functional safety documentation support.
Technical Context
The TPS7B8650QKVURQ1R2 employs a precision bandgap reference and low-noise error amplifier to maintain tight DC regulation across line, load, and temperature. Its architecture minimizes overshoot during dropout recovery and supports stable operation with ≥2.2µF ceramic output capacitance.
It integrates a programmable power-good function using an external capacitor on the DELAY pin to set reset timing, and features undervoltage lockout (UVLO) with 2.6V rising threshold and 230mV hysteresis - critical for robust startup in automotive battery environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V (withstands 42V transients); enables direct battery connection in 12V/24V automotive systems. |
| Output Current | 500mA max; sufficient for MCU cores, CAN transceivers, and sensor interfaces in body electronics. |
| Output Accuracy | ±0.85% over line/load/temperature; ensures reliable voltage margining for downstream logic and analog circuits. |
| Dropout Voltage | 475mV max at 450mA (VOUT ≥ 3.3V); preserves regulation during cranking when VIN drops to ~6V. |
| Quiescent Current | 17µA typical at light load; enables ultra-low standby power in always-on applications like RKE receivers. |
| Power-Good Delay | Programmable via external capacitor (e.g., 100nF → 80ms); allows precise sequencing with microcontroller reset timers. |
| Thermal Resistance | RθJA = 29.7°C/W (KVU package); supports >2W dissipation with proper PCB copper area and thermal pad grounding. |
Pinout & Package
TPS7B8650QKVURQ1R2 uses the KVU (TO-252-5) thermally enhanced package: 6.60mm × 10.11mm footprint with exposed thermal pad soldered to GND for optimal heat transfer. Pin 1 is IN, Pin 2 is EN, Pin 3 is GND, Pin 4 is FB/NC, Pin 5 is OUT. The thermal pad must be connected to GND for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Unregulated input supply | Accepts 3V–40V; requires ≥0.1µF ceramic capacitor to GND near pin for EMI suppression and transient response. |
| EN (Pin 2) | Enable control input | Active-high logic; VIH = 2V min, VIL = 0.7V max; must not float - tie to VIN or controller GPIO with pull-up. |
| GND (Pin 3) | Ground reference and thermal path | Low-impedance connection to PCB ground plane and thermal pad essential for stability and thermal derating. |
| FB/NC (Pin 4) | Feedback node / no-connect | Connect resistor divider for adjustable output; leave floating or tie to GND for fixed-output variants (not applicable here). |
| OUT (Pin 5) | Regulated output | Delivers 1.2V–18V; requires ≥2.2µF ceramic capacitor to GND; place capacitor within 5mm of pin for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient and –40°C to +150°C junction; validated for automotive under-hood and cabin use. |
| Programmable power-good delay | Delay time set by external capacitor on DELAY pin (not present on KVU); default t(DLY_FIX) = 100µs when pin left floating. |
| Ultra-low quiescent current | 17µA typical at light load; reduces battery drain in always-on systems - e.g., <1.5µA per year added leakage in RKE. |
| Robust cold-crank response | ±2% VOUT deviation during 3V/µs VIN slew; maintains MCU operation during engine start without brownout resets. |
| Functional safety documentation | FIT rate, failure mode analysis, and safety manual available to support ISO 26262 ASIL-B system-level certification. |
Applications
| Automotive Gateway Power Supply | Body Control Module (BCM) Core Rail |
|---|---|
Use Scenario: Powers ARM Cortex-M7 MCU, Ethernet PHY, and CAN FD transceivers in centralized vehicle gateway with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V/5V LDO supplying core logic and communication peripherals; provides clean, sequenced power with PG signal for MCU boot validation. Use Value: Withstands 40V load-dump transients and maintains ±2% regulation during cold-crank, eliminating need for upstream buck pre-regulator. |
Use Scenario: Supplies 5V rail to door module microcontrollers, LIN transceivers, and LED drivers in distributed BCM architecture. IC Role / Device Role / Timing Role: Adjustable-output LDO configured for 5.0V; EN pin controlled by main BCM processor for selective subsystem power gating. Use Value: 17µA IQ enables <10µA total sleep current per module, meeting OEM requirements for <100µA vehicle-wide parasitic drain. |
| Remote Keyless Entry (RKE) Receiver | Reconfigurable Instrument Cluster |
Use Scenario: Powers sub-GHz RF receiver IC and low-power MCU in passive entry fob with coin-cell or small Li-ion battery. IC Role / Device Role / Timing Role: Always-on LDO delivering 3.3V from variable battery (2.0V–4.2V); UVLO prevents operation below safe RF IC threshold. Use Value: 475mV dropout at 450mA allows full functionality down to 2.77V input - extends usable battery life by >15% vs. higher-VDO alternatives. |
Use Scenario: Supplies configurable display controller and graphics processor in digital instrument cluster with dynamic backlight dimming. IC Role / Device Role / Timing Role: Adjustable LDO set to 1.8V/3.3V rails; PG signal synchronizes GPU initialization with display driver firmware handshake. Use Value: ±0.85% accuracy ensures consistent gamma correction and color fidelity across temperature; eliminates calibration drift in –40°C to +85°C operating range. |
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 5V output only; identical input range, accuracy (±0.85%), and thermal specs; lacks adjustable feedback pin. | Suitable where 5V-only rail is required; eliminates external resistor divider but removes flexibility for other voltages. | Select when system needs only 5V and board space is constrained - same KVU footprint and thermal pad layout. |
| TLV73350PDBVR | Non-automotive grade; 300mA max output; 200mV typical dropout; no PG, UVLO, or AEC-Q100 qualification. | Limited to infotainment accessories or non-safety-critical interior modules; not qualified for powertrain or chassis systems. | Consider only for cost-sensitive, non-automotive-qualified designs where 500mA and functional safety are not required. |
Compared with TPS7B8650QKVURQ1R2, the TPS7B8750QKVURQ1 offers identical automotive reliability and thermal performance but sacrifices adjustability, while the TLV73350PDBVR trades qualification, current capability, and protection features for lower cost and smaller size in non-automotive contexts.
Availability
TPS7B8650QKVURQ1R2 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 production lifecycles.
Supply support for TPS7B8650QKVURQ1R2 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 ICs, with decades of experience in high-reliability power management solutions.
The TPS7B86-Q1 product line is engineered specifically for automotive battery-connected applications - emphasizing wide-input operation, transient resilience, ultra-low IQ, and functional safety compliance for ASIL-B systems.
FAQ
What is the maximum input voltage rating for the TPS7B8650QKVURQ1R2?
The TPS7B8650QKVURQ1R2 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 during cold-crank events down to ~6V input. Exceeding 42V risks permanent damage per the Absolute Maximum Ratings table.
Does the TPS7B8650QKVURQ1R2 support adjustable output voltage, and how is it configured?
Yes, the TPS7B8650QKVURQ1R2 supports adjustable output from 1.2V to 18V using an external resistor divider connected between OUT, FB/NC (Pin 4), and GND. The internal reference is 0.65V, so VOUT = 0.65V × (1 + R1/R2). Fixed-output versions exist, but this specific part number is the adjustable variant.
What thermal performance can be expected from the TPS7B8650QKVURQ1R2 in its KVU package?
In the KVU (TO-252-5) package, the TPS7B8650QKVURQ1R2 achieves RθJA = 29.7°C/W with JEDEC-standard 2oz copper board layout. With proper thermal pad soldering to GND, it can dissipate >2W continuously at +125°C ambient - enabling 500mA output at 5V with 12V input without thermal shutdown.
How does the power-good (PG) function operate on the TPS7B8650QKVURQ1R2?
The TPS7B8650QKVURQ1R2 does not include a dedicated PG pin in the KVU package - that feature is only available in the 8-pin DDA (HSOIC) variants. This part relies on output voltage monitoring via external circuitry or MCU ADC; the datasheet confirms PG is absent in KVU pinout (Fig 4-1 and Table 4-1).
Is the TPS7B8650QKVURQ1R2 qualified for functional safety applications?
Yes, the TPS7B8650QKVURQ1R2 is functional safety-capable: TI provides FIT rate data, failure mode effects analysis (FMEA), and a functional safety manual to support ISO 26262 ASIL-B system-level development. It is not ASIL-certified itself, but designed to enable compliant architectures.
TPS7B8650QKVURQ1R2 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):
- 5V
- 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:
- Enable
- 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
TPS7B8650QKVURQ1R2 FAQ
1.How can I place an order for TPS7B8650QKVURQ1R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8650QKVURQ1R2 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 TPS7B8650QKVURQ1R2 reliable?
The price and inventory of TPS7B8650QKVURQ1R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8650QKVURQ1R2 is usually 5 days.
3.What payment methods are accepted for TPS7B8650QKVURQ1R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8650QKVURQ1R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8650QKVURQ1R2?
TPS7B8650QKVURQ1R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8650QKVURQ1R2 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 TPS7B8650QKVURQ1R2?
For technical support, including TPS7B8650QKVURQ1R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8650QKVURQ1R2 requirements.
6.How does Aetrix verify that TPS7B8650QKVURQ1R2 is sourced from the original manufacturer or authorized distributors?
All TPS7B8650QKVURQ1R2 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 TPS7B8650QKVURQ1R2 meets industry standards.
7.What is the process for return or replacement of TPS7B8650QKVURQ1R2?
All TPS7B8650QKVURQ1R2 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8650QKVURQ1R2, 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 TPS7B8650QKVURQ1R2 part is unused and in its original packaging.
Return procedure for TPS7B8650QKVURQ1R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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