TPS73643DBVTIn StockTexas Instruments
Texas Instruments TPS73643DBVT is a 4.3V fixed-output LDO voltage regulator delivering up to 400mA with ultra-low 75mV typical dropout and ±0.5% accuracy. Features enable pin, 6V absolute max input, and compact 5-pin SOT-23 package. From $0.787 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- TPS73643DBVT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7870(MOQ 10)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4.3V Fixed Output with ±0.5% Accuracy: Delivers precise regulated voltage ideal for noise-sensitive analog and RF circuits
- Ultra-Low Dropout Voltage: Typical 75mV dropout at full load allows operation with minimal headroom from 4.5V to 5.5V input
- 400mA Output Current Capability: Supports a wide range of portable and embedded applications in a tiny SOT-23 footprint
- Enable Pin for System Power Management: Logic-compatible enable input allows easy sequencing and shutdown control
- Stable with Small Ceramic Capacitors: Optimized for low ESR ceramic output capacitors reducing BOM cost and PCB area
Applications
The TPS73643DBVT is well-suited for battery-powered portable devices, wearables, and IoT nodes where efficient post-regulation of a 5V rail is required. Its low dropout and small SOT-23 package make it ideal for space-constrained designs such as USB accessories, sensor modules, and handheld medical equipment. It is also commonly used to supply precision analog front-ends, ADCs, and RF transceivers that demand stable, low-noise 4.3V power.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.2V |
| Dropout Voltage1-Nom | 0.075V |
| Input Voltage Absolute-Max | 6V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 4.5V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.00043% |
| Load Regulation-Max | 0.034314% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.4A |
| Output Voltage1-Max | 4.343V |
| Output Voltage1-Min | 4.257V |
| Output Voltage1-Nom | 4.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 1% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS73643DBVT:
Frequently Asked Questions
What is the output voltage and accuracy of the TPS73643DBVT?
The TPS73643DBVT provides a fixed 4.3V output with ±0.5% accuracy over temperature and load, making it suitable for precision analog and digital circuits that require a stable supply.
What is the maximum output current and dropout voltage of the TPS73643DBVT?
The device supports up to 400mA output current with a typical dropout voltage of only 75mV and a maximum of 200mV at full load, allowing efficient operation from a 4.5V to 5.5V input supply.
What package does the TPS73643DBVT use and what are typical applications?
The TPS73643DBVT comes in a 5-pin SOT-23 (DBV) surface-mount package. It is commonly used in portable electronics, IoT devices, USB accessories, sensor modules, and as a post-regulator for precision analog front-ends requiring a clean 4.3V rail.
Can the TPS73643DBVT be used with ceramic output capacitors?
Yes, the TPS73643DBVT is stable with small ceramic capacitors, which have low ESR. This simplifies PCB layout, reduces BOM cost, and is ideal for compact, cost-sensitive designs.
What is the absolute maximum input voltage for the TPS73643DBVT?
The absolute maximum input voltage for the TPS73643DBVT is 6V, while the recommended operating input voltage range is 4.5V to 5.5V. Exceeding 6V may permanently damage the device.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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