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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Texas Instruments TPS7B8333QDCYRQ1M3

Name: TPS7B8333QDCYRQ1M3
Brand: Texas Instruments
SKU: TPS7B8333QDCYRQ1M3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS7B8333QDCYRQ1M3

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-261-4, TO-261AA

Datasheet:: TPS7B8333QDCYRQ1M3.pdf

Description:: IC REG LIN POS 3.3V 150MA SOT223

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Product details

Overview

TPS7B8333QDCYRQ1M3 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade low-dropout linear regulator (LDO) delivering fixed 3.3 V output at up to 150 mA, with ±1% DC accuracy over –40°C to +125°C ambient and input range of 3 V to 40 V. It features 230 mV max dropout at 150 mA, 18 µA typical quiescent current, and stable operation with ≥2.2 µF ceramic output capacitance - designed for always-on battery-connected systems such as remote keyless entry modules.

For engineers reviewing the TPS7B8333QDCYRQ1M3 datasheet, TPS7B8333QDCYRQ1M3 pinout, TPS7B8333QDCYRQ1M3 application, or TPS7B8333QDCYRQ1M3 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive thermal and transient performance, and real-world alternative selection guidance for body control module and instrument cluster power design.

Technical Context

The TPS7B8333QDCYRQ1M3 implements a PMOS pass transistor architecture enabling ultra-low quiescent current (18 µA typ) and fast line transient response (±2% V_OUT deviation during cold-crank). Its integrated undervoltage lockout (UVLO) has 2.6 V rising threshold and 230 mV hysteresis, while thermal shutdown activates at 175°C with 20°C hysteresis.

It operates across full automotive junction temperature range (–40°C to +150°C), supports load dump immunity up to 42 V absolute max input, and maintains regulation under 1-V/µs input slew rate. The device enters dropout when VIN falls below V_OUT + V_DO, with recovery overshoot minimized by novel internal compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	Fixed 3.3 V - eliminates external feedback network; enables compact layout in space-constrained automotive modules.
Output accuracy	±1% max over line, load, and temperature - ensures reliable MCU and CAN transceiver supply within tight voltage margins.
Dropout voltage	230 mV max at 150 mA - sustains regulation down to VIN = 3.53 V, critical during cold-crank (6–8 V battery dips).
Quiescent current	18 µA typ - minimizes standby power loss in always-on systems; extends battery life in RKE and gateway applications.
Input voltage range	3 V to 40 V (42 V abs max) - withstands automotive load dump transients without external protection circuitry.
Stability capacitor	≥2.2 µF ceramic (X5R/X7R) - enables robust stability with low-ESR capacitors; no need for tantalum or electrolytic types.
PSRR @ 1 kHz	55 dB at 150 mA - suppresses ripple from noisy 12 V battery rails, reducing noise coupling into sensitive analog subsystems.

Pinout & Package

TPS7B8333QDCYRQ1M3 is housed in a thermally enhanced 3-pin SOT-223 (DCY) package measuring 6.50 mm × 3.50 mm, with exposed thermal pad connected to GND for improved heat dissipation in high-ambient automotive environments.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Unregulated input power	Accepts 3–40 V battery rail; requires ≥0.1 µF ceramic capacitor to GND for EMI suppression and transient response.
2, 4 (GND)	Ground reference & thermal path	Dual GND pins (pins 2 and 4) connect to PCB thermal pad; low-impedance GND routing essential for thermal performance and noise rejection.
3 (OUT)	Regulated 3.3 V output	Delivers up to 150 mA; requires ≥2.2 µF ceramic capacitor to GND placed adjacent to pin for stability and transient recovery.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for –40°C to +125°C ambient operation - meets automotive reliability requirements for body electronics and gateways.
Functional Safety-Capable	Documentation available for ISO 26262 ASIL-B system integration - supports safety analysis and FMEDA without requiring additional hardware redundancy.
Cold-crank transient response	±2% V_OUT deviation during 1-V/µs input slew - maintains microcontroller operation during engine start without brownout reset.
UVLO with hysteresis	2.6 V rising / 2.5 V falling threshold, 230 mV hysteresis - prevents oscillation during slow battery ramp-up or weak battery conditions.
Thermal shutdown protection	175°C activation with 20°C hysteresis - protects against sustained overload or poor heatsinking without latch-up; enables auto-recovery.

Applications

Reconfigurable Instrument Clusters	Body Control Modules (BCM)
Use Scenario: Powering display controllers, backlight drivers, and CAN-FD communication interfaces in digital dashboards with dynamic content updates. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying microcontroller core logic and interface peripherals during ignition-off memory retention and ignition-on active operation. Use Value: 18 µA quiescent current prevents excessive battery drain during multi-day vehicle park time; ±1% accuracy ensures consistent display timing and sensor interface calibration.	Use Scenario: Supplying door module MCUs, window lift drivers, and LIN transceivers in centralized or distributed BCM architectures. IC Role / Device Role / Timing Role: Always-on 3.3 V regulator powering wake-up logic and low-power sensors; handles repeated cold-crank cycles without dropout-induced resets. Use Value: 230 mV dropout enables continuous operation down to 3.53 V input - sustaining function through extended cranking events where battery voltage drops to 6 V.
Automotive Gateways	Remote Keyless Entry (RKE)
Use Scenario: Providing clean 3.3 V bias to multi-protocol gateway SoCs managing CAN, LIN, Ethernet, and wireless coexistence. IC Role / Device Role / Timing Role: Secondary regulated rail decoupling high-noise digital domains from analog PHY sections and clock generation circuits. Use Value: 55 dB PSRR at 1 kHz suppresses switching noise from DC/DC converters sharing the same 12 V bus, preserving signal integrity in high-speed interfaces.	Use Scenario: Powering ultra-low-power RKE receiver ICs and sub-GHz RF front-ends that remain active during vehicle sleep mode. IC Role / Device Role / Timing Role: Standby power source maintaining real-time clock, wake-up interrupt logic, and secure authentication circuitry. Use Value: Stable 3.3 V output with <2.2 µF capacitor support enables miniaturized PCB layouts in compact fob designs; AEC-Q100 qualification ensures field reliability.

Reconfigurable Instrument Clusters

Body Control Modules (BCM)

Use Scenario: Powering display controllers, backlight drivers, and CAN-FD communication interfaces in digital dashboards with dynamic content updates.

IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying microcontroller core logic and interface peripherals during ignition-off memory retention and ignition-on active operation.

Use Value: 18 µA quiescent current prevents excessive battery drain during multi-day vehicle park time; ±1% accuracy ensures consistent display timing and sensor interface calibration.

Use Scenario: Supplying door module MCUs, window lift drivers, and LIN transceivers in centralized or distributed BCM architectures.

IC Role / Device Role / Timing Role: Always-on 3.3 V regulator powering wake-up logic and low-power sensors; handles repeated cold-crank cycles without dropout-induced resets.

Use Value: 230 mV dropout enables continuous operation down to 3.53 V input - sustaining function through extended cranking events where battery voltage drops to 6 V.

Automotive Gateways

Remote Keyless Entry (RKE)

Use Scenario: Providing clean 3.3 V bias to multi-protocol gateway SoCs managing CAN, LIN, Ethernet, and wireless coexistence.

IC Role / Device Role / Timing Role: Secondary regulated rail decoupling high-noise digital domains from analog PHY sections and clock generation circuits.

Use Value: 55 dB PSRR at 1 kHz suppresses switching noise from DC/DC converters sharing the same 12 V bus, preserving signal integrity in high-speed interfaces.

Use Scenario: Powering ultra-low-power RKE receiver ICs and sub-GHz RF front-ends that remain active during vehicle sleep mode.

IC Role / Device Role / Timing Role: Standby power source maintaining real-time clock, wake-up interrupt logic, and secure authentication circuitry.

Use Value: Stable 3.3 V output with <2.2 µF capacitor support enables miniaturized PCB layouts in compact fob designs; AEC-Q100 qualification ensures field reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS7B8233QDCYRQ1	Lower I_Q (12 µA typ), same 3.3 V/150 mA output, but reduced PSRR (45 dB @ 1 kHz) and no functional safety documentation.	Suitable for cost-sensitive, non-safety-critical always-on nodes where PSRR >50 dB is not required.	Choose when lower quiescent current is prioritized over transient immunity and functional safety compliance.
NCP163AMX330TBG	3.3 V/150 mA, 25 µA I_Q, AEC-Q100 qualified, but only rated to 28 V input and lacks UVLO hysteresis or cold-crank validation data.	Fits simpler 12 V systems without load dump exposure; not recommended for 24 V commercial vehicles or gateways.	Select only for 12 V passenger car body electronics with limited transient stress and no ASIL-level safety requirements.

Compared with TPS7B8333QDCYRQ1M3, the TPS7B8233QDCYRQ1 trades PSRR and safety documentation for lower I_Q, while NCP163AMX330TBG sacrifices input voltage headroom and transient robustness for broader distributor availability - making TPS7B8333QDCYRQ1M3 the optimal choice for safety-aware, high-transient automotive gateways and instrument clusters.

Availability

TPS7B8333QDCYRQ1M3 is available at Aetrix Electronics and suitable for reconfigurable instrument clusters, body control modules, and automotive gateways requiring stable component supply with full AEC-Q100 traceability and long-term automotive lifecycle support.

Supply support for TPS7B8333QDCYRQ1M3 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 electronics, with decades of automotive qualification expertise and broad functional safety ecosystem support.

The TPS7B83-Q1 product line is engineered specifically for battery-connected automotive subsystems demanding ultra-low I_Q, high-voltage resilience, and ASIL-ready design assurance - targeting always-on modules where reliability and transient immunity are non-negotiable.

FAQ

What is the maximum input voltage rating for TPS7B8333QDCYRQ1M3?

The TPS7B8333QDCYRQ1M3 has an absolute maximum input voltage of 42 V, with recommended operating range from 3 V to 40 V. This allows it to survive automotive load dump transients without external clamping, making it suitable for direct battery connection in 12 V and 24 V systems. Operation beyond 40 V is not recommended for sustained use per TI's Recommended Operating Conditions.

Does TPS7B8333QDCYRQ1M3 require an enable pin for operation?

No, the TPS7B8333QDCYRQ1M3 does not include an enable (EN) pin - it operates continuously when valid input voltage is applied. Its undervoltage lockout (UVLO) circuit automatically disables the output when VIN falls below 2.38 V (falling threshold), eliminating the need for external control logic in simple always-on applications like RKE receivers or gateway wake-up circuits.

Can TPS7B8333QDCYRQ1M3 be used with ceramic output capacitors smaller than 2.2 µF?

No - TI specifies a minimum 2.2 µF ceramic output capacitor (X5R/X7R) for stability across temperature and load. Using smaller values risks oscillation or degraded transient response. While 1 µF is noted as the effective minimum capacitance for stability, the 2.2 µF requirement accounts for DC bias derating; undersized capacitors may cause output voltage instability during load steps or cold-crank events.

How does TPS7B8333QDCYRQ1M3 handle cold-crank conditions?

The TPS7B8333QDCYRQ1M3 maintains ±2% output voltage deviation during cold-crank transients with 1-V/µs input slew rate, thanks to its optimized control loop and PMOS pass element. Its 230 mV dropout at 150 mA ensures regulation remains intact even as battery voltage dips to ~3.53 V, preventing microcontroller resets in instrument clusters and BCMs during engine start.

Is TPS7B8333QDCYRQ1M3 compatible with lead-free PCB assembly processes?

Yes, TPS7B8333QDCYRQ1M3 is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020 moisture sensitivity level 3). Its SOT-223 (DCY) package uses matte tin plating and withstands peak temperatures up to 260°C, supporting automated surface-mount assembly in automotive manufacturing lines without solder joint reliability concerns.

TPS7B8333QDCYRQ1M3 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: TO-261-4, TO-261AA

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):: 0.23V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 26 µA

Current - Supply (Max):: -

PSRR:: 55dB (1kHz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Under Voltage Lockout (UVLO)

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223-4

TPS7B8333QDCYRQ1M3 FAQ

1.How can I place an order for TPS7B8333QDCYRQ1M3 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS7B8333QDCYRQ1M3 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 TPS7B8333QDCYRQ1M3 reliable?

The price and inventory of TPS7B8333QDCYRQ1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8333QDCYRQ1M3 is usually 5 days.

3.What payment methods are accepted for TPS7B8333QDCYRQ1M3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8333QDCYRQ1M3 transactions.

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4.How is shipping managed for TPS7B8333QDCYRQ1M3?

TPS7B8333QDCYRQ1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS7B8333QDCYRQ1M3 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 TPS7B8333QDCYRQ1M3?

For technical support, including TPS7B8333QDCYRQ1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8333QDCYRQ1M3 requirements.

6.How does Aetrix verify that TPS7B8333QDCYRQ1M3 is sourced from the original manufacturer or authorized distributors?

All TPS7B8333QDCYRQ1M3 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 TPS7B8333QDCYRQ1M3 meets industry standards.

7.What is the process for return or replacement of TPS7B8333QDCYRQ1M3?

All TPS7B8333QDCYRQ1M3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8333QDCYRQ1M3, 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 TPS7B8333QDCYRQ1M3 part is unused and in its original packaging.

Return procedure for TPS7B8333QDCYRQ1M3:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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