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Texas Instruments TPS7B8633QKVURQ1R2
- Part No.:
- TPS7B8633QKVURQ1R2
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Datasheet:
-
TPS7B8633QKVURQ1R2.pdf
- Description:
- AUTOMOTIVE 500-MA, 40-V, ULTRA-L
- Quantity:
- Payment:
- Shipping:
Inventory:4,961
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Product details
Overview
TPS7B8633QKVURQ1R2 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator delivering 500mA output current with 3.3V fixed output, 40V max input, ±0.85% DC 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 TPS7B8633QKVURQ1R2 datasheet, TPS7B8633QKVURQ1R2 pinout, TPS7B8633QKVURQ1R2 application, or TPS7B8633QKVURQ1R2 equivalent, key selection criteria include cold-crank transient response (±2% VOUT deviation), ultra-low quiescent current (17μA typ), adjustable PG delay, and TO-252 thermal performance (29.7°C/W RθJA).
Technical Context
The TPS7B8633QKVURQ1R2 employs a robust bipolar-based LDO architecture optimized for automotive battery rail operation, supporting 3V–40V input and maintaining regulation during load-dump and cold-crank events. Its feedback loop includes internal compensation stable with ≥2.2µF ceramic output capacitance and low-ESR requirements (≤2Ω).
It integrates a precision bandgap reference (0.65V FB voltage), programmable power-good delay via external capacitor on the DELAY pin, and thermal shutdown with 175°C trip point and 20°C hysteresis. The device features undervoltage lockout (UVLO) with 2.7V rising threshold and 2.5V falling threshold to prevent erratic startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±0.85% over line/load/temperature - ensures reliable MCU core logic supply under automotive thermal and voltage stress. |
| Max output current | 500mA - sufficient to power dual-core automotive MCUs or multiple CAN transceivers simultaneously. |
| Input voltage range | 3V to 40V (42V absolute max) - withstands ISO 7637-2 load dump pulses and cold-crank down to 3V without dropout. |
| Quiescent current | 17μA typical at light load - enables <100μA system standby current for >1-year battery life in always-on RKE applications. |
| Dropout voltage | 475mV max at 450mA (VOUT ≥ 3.3V) - maintains regulation even when battery drops to 3.77V under high load. |
| Power-good delay | Programmable via external capacitor (e.g., 100nF → 80ms delay) - synchronizes downstream reset timing with system power sequencing. |
| Thermal resistance | RθJA = 29.7°C/W (TO-252 package) - allows 1.2W continuous dissipation at TA = 125°C with standard PCB copper area. |
Pinout & Package
TPS7B8633QKVURQ1R2 uses the KVU (TO-252-5) thermally enhanced surface-mount package with exposed thermal pad soldered to GND. 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 a low-impedance GND plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Unregulated input supply | Accepts 3V–40V battery rail; requires ≥0.1µF ceramic input capacitor placed adjacent to pin for EMI suppression and transient energy buffering. |
| EN (Pin 2) | Enable control input | Active-high logic input (VIH ≥ 2V); must not float - tie to VIN via pull-up or MCU GPIO to ensure deterministic startup/shutdown behavior. |
| GND (Pin 3) | Ground reference and thermal path | Primary return path for load current and thermal conduction; must be low-impedance connection to PCB ground plane and thermal pad. |
| FB/NC (Pin 4) | Feedback input / No-connect | NC for fixed 3.3V version; left floating or tied to GND - unused in this variant, unlike adjustable versions requiring resistor divider. |
| OUT (Pin 5) | Regulated output | Delivers stable 3.3V to load; requires ≥2.2µF ceramic output capacitor with ESR ≤2Ω placed within 5mm of pin for stability and transient response. |
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 under-hood and instrument cluster deployment. |
| Ultra-low quiescent current | 17μA typical at light load and 5μA max in shutdown - enables compliance with automotive ISO 16750-2 standby current limits. |
| Cold-crank line transient response | ±2% VOUT deviation during 3V/µs VIN slew rate - maintains MCU operation during engine start without brownout resets. |
| Programmable power-good delay | Configurable delay (100µs default to >100ms) via external capacitor on DELAY pin - eliminates need for external RC timers in safety-critical power sequencing. |
| Functional Safety-Capable documentation | FIT rate, failure mode analysis, and diagnostic coverage data available - supports ISO 26262 ASIL-B system-level FMEDA. |
Applications
| Automotive Gateway Power | Body Control Module (BCM) Core Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-M7 MCU, Ethernet PHY, and dual CAN FD transceivers in centralized vehicle gateway with 24/7 battery connection. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying core logic and communication peripherals; PG signal triggers system initialization after stable rail. Use Value: Withstands 40V load dumps and recovers from cold-crank dips to 3.5V without dropout, ensuring uninterrupted network uptime. |
Use Scenario: Supplies 3.3V to door module MCU, LIN transceiver, and LED drivers in body control unit with multi-year battery standby requirement. IC Role / Device Role / Timing Role: Always-on LDO enabling low-power sleep modes; EN pin controlled by main BCM controller for selective subsystem wake-up. Use Value: 17μA IQ enables <80μA total system standby current, meeting OEM 10-year battery life targets for passive entry systems. |
| Remote Keyless Entry (RKE) Receiver | Reconfigurable Instrument Cluster |
|
Use Scenario: Powers sub-GHz RF receiver IC and secure authentication MCU in key fob with coin-cell or rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Fixed-output LDO providing noise-immune 3.3V rail; PG confirms valid power before enabling cryptographic operations. Use Value: 475mV dropout at 500mA allows full functionality down to 3.77V battery voltage - extends usable battery range by 15% vs higher-dropout alternatives. |
Use Scenario: Supplies display controller, graphics processor, and touch interface in digital instrument cluster with dynamic brightness and animation. IC Role / Device Role / Timing Role: Secondary LDO delivering clean 3.3V to sensitive analog front-end and ADC reference circuitry. Use Value: ±0.85% DC accuracy and <2% load transient deviation ensure consistent color rendering and flicker-free TFT backlight control across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8733QKVURQ1 | Higher IQ (25μA typ), same 500mA/3.3V/40V specs, but no power-good output | Lacks PG signal - unsuitable where system reset coordination or fault reporting is required | Select only if PG functionality is omitted from design and lowest possible IQ is critical |
| NCP163AMX330TBG | 300mA max output, 1.8V–6.5V input, no automotive qualification or PG, RθJA = 120°C/W | Not AEC-Q100 qualified; insufficient current and thermal capability for gateway/BCM use | Consider only for non-automotive, low-current, cost-sensitive consumer applications |
Compared with TPS7B8633QKVURQ1R2, TPS7B8733QKVURQ1 trades PG functionality for marginally lower IQ, while NCP163AMX330TBG lacks automotive qualification, current headroom, and thermal performance - making TPS7B8633QKVURQ1R2 the only qualified solution for safety-critical, high-reliability 500mA automotive LDO needs.
Availability
TPS7B8633QKVURQ1R2 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 TPS7B8633QKVURQ1R2 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 and broad manufacturing scale.
The TPS7B86-Q1 product line delivers high-reliability, wide-input LDOs specifically engineered for battery-connected automotive subsystems demanding AEC-Q100 Grade 1 operation, functional safety support, and exceptional transient immunity.
FAQ
What is the maximum input voltage rating for the TPS7B8633QKVURQ1R2?
The TPS7B8633QKVURQ1R2 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 per ISO 7637-2 Pulse 5a (up to 40V for 400ms) without damage or regulation loss, making it suitable for direct battery connection in 12V and 24V systems.
Does the TPS7B8633QKVURQ1R2 require an external feedback resistor network?
No, the TPS7B8633QKVURQ1R2 is the fixed 3.3V output variant and does not require external feedback resistors. Pin 4 (FB/NC) is a no-connect terminal - it may be left floating or tied to GND for mechanical stability, but must not be connected to any active circuitry as it is internally terminated for the fixed-output configuration.
How is the power-good delay configured on the TPS7B8633QKVURQ1R2?
The TPS7B8633QKVURQ1R2 does not include a DELAY pin in the KVU (TO-252-5) package - that functionality is exclusive to the 8-pin HSOIC DDA variants. Therefore, the TPS7B8633QKVURQ1R2 provides only the fixed 100µs power-good propagation delay and cannot be externally programmed. For adjustable delay, select the DDA-package TPS7B8633QDDARQ1.
What thermal performance can be expected from the TPS7B8633QKVURQ1R2 in a standard PCB layout?
In a standard 4-layer JEDEC JESD51-7 compliant board with 2oz copper and thermal pad soldered to a 100mm² GND plane, the TPS7B8633QKVURQ1R2 achieves RθJA = 29.7°C/W. At 500mA output into 3.3V, with 13.5V input, power dissipation is ~5.1W, resulting in ~152°C junction rise above ambient - confirming derating is required above TA = 73°C for continuous operation.
Is the TPS7B8633QKVURQ1R2 compatible with ceramic output capacitors below 2.2µF?
No - the TPS7B8633QKVURQ1R2 requires a minimum 2.2µF ceramic output capacitor for guaranteed stability across temperature and load. Using smaller values risks oscillation or excessive overshoot during load transients. TI's datasheet specifies effective output capacitance ≥1µF minimum, but 2.2µF is the nominal value validated for all conditions including worst-case ESR (≤2Ω) and -40°C to +150°C operation.
TPS7B8633QKVURQ1R2 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:
- 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
TPS7B8633QKVURQ1R2 FAQ
1.How can I place an order for TPS7B8633QKVURQ1R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8633QKVURQ1R2 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 TPS7B8633QKVURQ1R2 reliable?
The price and inventory of TPS7B8633QKVURQ1R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8633QKVURQ1R2 is usually 5 days.
3.What payment methods are accepted for TPS7B8633QKVURQ1R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8633QKVURQ1R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8633QKVURQ1R2?
TPS7B8633QKVURQ1R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8633QKVURQ1R2 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 TPS7B8633QKVURQ1R2?
For technical support, including TPS7B8633QKVURQ1R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8633QKVURQ1R2 requirements.
6.How does Aetrix verify that TPS7B8633QKVURQ1R2 is sourced from the original manufacturer or authorized distributors?
All TPS7B8633QKVURQ1R2 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 TPS7B8633QKVURQ1R2 meets industry standards.
7.What is the process for return or replacement of TPS7B8633QKVURQ1R2?
All TPS7B8633QKVURQ1R2 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8633QKVURQ1R2, 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 TPS7B8633QKVURQ1R2 part is unused and in its original packaging.
Return procedure for TPS7B8633QKVURQ1R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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