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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators > TPS73633DBVT
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TPS73633DBVT

In Stock 4250 pcs Reference Price(In US Dollars)
1+
$2.012
Manufacturer Part Number:
TPS73633DBVT
Manufacturer / Brand
Texas Instruments
Part of Description:
IC REG LINEAR 3.3V 400MA SOT23-5
Datasheets:
TPS73633DBVT(1).pdfTPS73633DBVT(2).pdfTPS73633DBVT(3).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 4250 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number TPS73633DBVT
Manufacturer / Brand Texas Instruments
Stock Quantity 4250 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Description IC REG LINEAR 3.3V 400MA SOT23-5
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ TPS73633DBVT Datasheets TPS73633DBVT Details PDF
TPS73633DBVT Details PDF for FR.pdf
TPS73633DBVT Details PDF for KR.pdf
TPS73633DBVT Details PDF for IT.pdf
TPS73633DBVT Details PDF for ES.pdf
TPS73633DBVT Details PDF for DE.pdf
Voltage Dropout (Max) 0.2V @ 400mA
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max) -
Voltage - Input (Max) 5.5V
Supplier Device Package SOT-23-5
Series -
Protection Features Over Current, Over Temperature, Reverse Polarity
Package / Case SC-74A, SOT-753
Package Tape & Reel (TR)
PSRR 58dB ~ 37dB (100Hz ~ 10kHz)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 125°C
Number of Regulators 1
Mounting Type Surface Mount
Current - Supply (Max) 1 mA
Current - Quiescent (Iq) 550 µA
Current - Output 400mA
Control Features Enable
Base Product Number TPS73633

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

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Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
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TPS73633DBVT Product Details:

The TPS73633DBVT is a linear voltage regulator IC manufactured by Luminary Micro / Texas Instruments. It belongs to the "PMIC - Voltage Regulators - Linear" product category, providing a fixed positive 3.3V output voltage with a maximum current of 400mA.

The key features of the TPS73633DBVT include:

- Fixed 3.3V output voltage with a wide input voltage range of up to 5.5V

- Compact SOT-23-5 package with a small footprint, suitable for space-constrained applications

- Operates over a wide temperature range of -40°C to 125°C

- Includes protection features such as overcurrent, overtemperature, and reverse polarity protection

- Low quiescent current of 550μA, contributing to efficient power consumption

- Good power supply rejection ratio (PSRR) of 58dB to 37dB across the 100Hz to 10kHz frequency range

- Low voltage dropout of 0.2V at the maximum output current of 400mA

The TPS73633DBVT is well-suited for a variety of applications, including portable electronics, industrial equipment, and consumer devices that require a reliable and efficient 3.3V power supply. Its small size, wide temperature range, and protection features make it a versatile choice for designers.

Equivalent or alternative models to the TPS73633DBVT include:

- TPS73618DBVR: Similar 3.3V fixed-output linear regulator with a lower maximum output current of 150mA

- TPS73633DBVR: Same 3.3V fixed-output linear regulator but in a different packaging (SOT-23-5)

- TPS73850DBVR: 5.0V fixed-output linear regulator with a maximum output current of 150mA

- TPS73901DBVR: Adjustable output linear regulator with a maximum output current of 100mA

These equivalent models offer different output voltage, current, and packaging options, allowing designers to select the most suitable regulator for their specific application requirements.

TPS73633DBVT Key Technical Attributes

Linear Voltage Regulator IC

Output: 3.3V 400mA

Enabled control features

TPS73633DBVT Packing Size

Type: SOT-23-5

Material: Tape & Reel (TR)

Size: SC-74A, SOT-753

Thermal and electrical properties: PSRR: 58dB ~ 37dB, Voltage Dropout 0.2V @ 400mA

TPS73633DBVT Application

Ideal for handheld devices

Used in battery-operated equipment

Support low-voltage active RF amplifiers

TPS73633DBVT Features

The TPS73633DBVT is a linear voltage regulator integrated circuit offering a fixed output of 3.3V with an output current capacity of 400mA. It falls under the classification of PMIC - Voltage Regulators - Linear, providing efficient linear voltage regulation with minimal voltage dropout of 0.2V at maximum load, ensuring consistent performance. It also supports a maximum input voltage of 5.5V, making it suitable for a variety of low-power applications. The low quiescent current of 550A, coupled with enhanced power-supply rejection ratio (PSRR) spanning from 58dB to 37dB over a frequency range of 100Hz to 10kHz, provides superior noise filtering and stable output in fluctuating input conditions.

TPS73633DBVT Quality and Safety Features

Lead-free / RoHS Compliant ensuring environmental safety

Over Current, Over Temperature, Reverse Polarity protection enhancing reliability and robustness

Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life before the assembly under normal conditions

TPS73633DBVT Compatibility

Supports a variety of applications requiring a 3.3V output

High compatibility with active RF amplifiers and battery-operated devices

TPS73633DBVT Datasheet PDF

For the most comprehensive and authoritative details, please access the datasheet for TPS73633DBVT available on our website. We encourage customers to download the datasheet directly from the current page for complete specifications and guidelines.

Quality Distributor

IC-Components is a premier distributor of Luminary Micro / Texas Instruments products including TPS73633DBVT. We guarantee availability and the best prices. For accurate quotes and efficient purchasing experience, visit our website and relieve your supply chain pressures by ordering with us today.

Frequently Asked Questions

What are the key design considerations when using the TPS73633DBVT in a battery-powered system with input voltages close to 3.3V?
When designing with the TPS73633DBVT in battery-powered applications where the input voltage may drop near the 3.3V output (e.g., Li-ion or 2S NiMH systems), it's critical to account for its maximum dropout voltage of 0.2V at 400mA. This means the input must remain above 3.5V under full load to maintain regulation. As battery voltage decays below this threshold, output regulation will degrade, potentially causing system instability. Designers should implement low-dropout-aware power sequencing or consider a buck-boost converter if input can fall below 3.5V. The TPS73633DBVT’s low quiescent current (550µA) helps extend battery life during light loads, but headroom must be preserved during peak current events.
Can the TPS73633DBVT be used as a direct drop-in replacement for the MCP1700-3302E/TT in a 3.3V, 250mA application?
While both are 3.3V LDOs in SOT-23 packages, the TPS73633DBVT is not a direct electrical drop-in for the MCP1700-3302E/TT due to differences in enable logic, quiescent current, and dropout performance. The MCP1700 has a lower quiescent current (~1.6µA vs. 550µA on the TPS73633DBVT) and lacks an enable pin, whereas the TPS73633DBVT includes an active-high enable input that must be properly biased or tied high. Additionally, the TPS73633DBVT has a lower dropout voltage (200mV vs. ~178mV at 250mA), offering marginal improvement. If replacing, ensure the enable pin is correctly driven and assess whether the higher Iq impacts battery life in always-on applications.
How does the enable pin on the TPS73633DBVT affect power sequencing in multi-rail systems, and what pull-up/pull-down strategies are recommended?
The enable (EN) pin on the TPS73633DBVT allows precise control over power-up sequencing in multi-voltage designs. It has an internal pull-down resistor (~1MΩ), so leaving it floating may cause unintended turn-on. For reliable operation, tie EN to VIN for always-on behavior or drive it with a microcontroller GPIO. When sequencing, ensure EN is asserted only after input voltage is stable (>3.5V under load). Avoid driving EN above VIN + 0.3V to prevent latch-up. In noise-sensitive environments, add a small RC filter (e.g., 10kΩ + 100nF) to suppress glitches. Proper EN control enables safe coordination with other regulators like the TPS73633DBVT in FPGA or microcontroller power trees.
Is the TPS73633DBVT suitable for automotive under-hood applications given its -40°C to 125°C operating range?
Although the TPS73633DBVT is rated for -40°C to 125°C junction temperature, it is not AEC-Q100 qualified and lacks automotive-grade screening, making it unsuitable for under-hood or safety-critical automotive systems. The temperature rating reflects semiconductor limits, not reliability under automotive stress conditions (e.g., thermal cycling, humidity, vibration). For under-hood use, consider automotive-grade alternatives like the TPS7B6933-Q1. The TPS73633DBVT may be acceptable in cabin electronics with controlled environments, but long-term reliability in harsh conditions cannot be assured without qualification data.
What input and output capacitor values and types are required for stable operation of the TPS73633DBVT, and can ceramic capacitors be used?
The TPS73633DBVT is stable with low-ESR ceramic capacitors, requiring a minimum of 1µF on both input and output. Use X5R or X7R dielectric types rated for at least 6.3V to maintain capacitance over voltage and temperature. Unlike some older LDOs, the TPS73633DBVT does not require a minimum ESR, enabling full ceramic capacitor implementation—ideal for space-constrained designs. Place capacitors as close as possible to the VIN and VOUT pins to minimize parasitic inductance. Avoid Y5V dielectrics due to poor capacitance stability. This capacitor compatibility simplifies PCB layout and improves transient response in the TPS73633DBVT.
Can the TPS73633DBVT handle reverse polarity connection, and how does its protection compare to similar LDOs without this feature?
Yes, the TPS73633DBVT includes built-in reverse polarity protection, meaning it can withstand accidental connection of VIN to GND or reverse voltage application without damage—up to the absolute maximum ratings. This is a significant advantage over standard LDOs like the LM1117, which lack this protection and can fail catastrophically under reverse bias. However, reverse polarity protection increases the effective dropout voltage slightly and requires that the input capacitor be rated for the full reverse voltage. For industrial or field-deployed systems where wiring errors are possible, the TPS73633DBVT offers enhanced robustness without requiring external diodes.
What is the expected long-term reliability of the TPS73633DBVT in industrial control systems operating continuously at 85°C ambient temperature?
The TPS73633DBVT, housed in a SOT-23-5 package with MSL 1 (unlimited floor life), is suitable for industrial use at 85°C ambient, provided thermal design is adequate. With a junction-to-ambient thermal resistance (θJA) of approximately 220°C/W, power dissipation must be limited to avoid exceeding Tj = 125°C. At 400mA and 0.2V dropout, Pd = 80mW, resulting in ΔT ≈ 18°C—well within limits at 85°C ambient. Long-term reliability is enhanced by derating input voltage and load current. Texas Instruments provides HTOL and ESD data supporting >10-year lifespan under typical industrial conditions, making the TPS73633DBVT a reliable choice for factory automation and motor control systems.
How does the PSRR of the TPS73633DBVT compare to other 3.3V LDOs in the 1kHz to 10kHz range, and what implications does this have for noise-sensitive analog circuits?
The TPS73633DBVT offers a PSRR of 58dB at 100Hz and 37dB at 10kHz, which is competitive among low-Iq LDOs but lower than high-performance regulators like the TPS7A4700. This performance is sufficient for most digital systems (e.g., MCUs, FPGAs), but may be marginal for precision analog circuits (e.g., ADCs, sensors) powered from noisy switch-mode supplies. In such cases, add a π-filter (LC or RC) before the TPS73633DBVT or use a dedicated low-noise LDO. The PSRR roll-off above 1kHz indicates limited high-frequency rejection, so ensure input ripple is minimized through proper input filtering and layout.
Are there pin-compatible alternatives to the TPS73633DBVT with lower quiescent current for ultra-low-power IoT devices?
Yes, for ultra-low-power IoT applications where 550µA Iq is excessive, consider the MCP1700-3302E/TT (1.6µA Iq) or the TPS79233 (33µA Iq), though neither is fully pin-compatible with the TPS73633DBVT due to differing pinouts and feature sets. The TPS79233 shares the SOT-23-5 package and fixed 3.3V output but includes a power-good pin instead of enable. The MCP1700 has no enable and different pin assignments. Migration requires PCB layout changes. Evaluate trade-offs: the TPS73633DBVT offers enable control and reverse polarity protection, while alternatives reduce Iq at the cost of features. Always verify footprint compatibility before substitution.
What layout practices are critical when placing the TPS73633DBVT on a 2-layer PCB to minimize noise and ensure thermal performance?
On a 2-layer PCB, place the TPS73633DBVT close to the load and use short, wide traces for VIN, VOUT, and GND to minimize inductance and resistance. Connect the GND pin directly to a solid ground plane on the bottom layer using multiple vias. Place input and output capacitors within 3mm of the respective pins. Avoid routing high-speed digital signals under the regulator. The SOT-23-5 package has limited thermal dissipation; if operating near 400mA continuously, consider adding thermal vias under the pad (if exposed) or increasing copper area on VOUT and GND. Poor layout can degrade PSRR and cause instability, especially in the TPS73633DBVT’s high-bandwidth feedback loop.

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