TPS73643DBVTG4 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The TPS73643DBVTG4 is a capacitor-free NMOS LDO voltage regulator from Texas Instruments with 400 mA output current and 4.5 V to 5.5 V input range. It achieves a typical dropout voltage of only 75 mV and 0.000875% maximum line regulation in a compact 5-pin SOT-23 package. Ideal for noise-sensitive digital and analog supply rails requiring stable voltage with minimal external components.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- TPS73643DBVTG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Capacitor-free NMOS LDO design eliminating the need for output capacitor and reducing BOM cost in space-constrained 400 mA regulator applications
- Ultra-low typical dropout voltage of 75 mV enabling efficient regulation from 4.5 V to 5.5 V input with minimal headroom loss
- 0.000875% maximum line regulation delivering exceptional output voltage stability for sensitive analog and mixed-signal power supply rails
Applications
The TPS73643DBVTG4 is well suited for powering DSPs, FPGAs, and microprocessors from a 5 V bus where a stable 4.3 V or lower fixed output with 400 mA load current is required. Its capacitor-free architecture simplifies PCB layout and reduces component count in compact portable electronics, wearables, and IoT sensor nodes. High line regulation performance also makes it attractive for precision reference voltage rails in data converters and analog front-end circuits.
Specifications
| 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 | 0.000875% |
| 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 |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| 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 | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS73643DBVTG4:
Frequently Asked Questions
How does the TPS73643DBVTG4's capacitor-free design reduce BOM cost and PCB area compared to conventional LDOs?
Conventional LDOs require an external output capacitor of 1 µF to 10 µF for stability, adding component cost and board space. The TPS73643DBVTG4's NMOS architecture achieves unconditional stability without any output capacitor, freeing approximately 1 to 4 mm² of PCB area in a 5-pin SOT-23 footprint and reducing the BOM by at least one passive component per rail in multi-rail portable device designs.
For a 5 V bus system powering a precision ADC, how does the TPS73643DBVTG4's 0.000875% line regulation benefit measurement accuracy?
A 0.000875% maximum line regulation means that a 1 V change on the 4.5 V to 5.5 V input bus results in less than 8.75 µV of output voltage variation per volt, keeping the ADC reference voltage stable even during load transients on the 5 V rail. For a 16-bit ADC with 4 V full scale, this regulation level keeps supply-induced errors below 0.1 LSB, preserving conversion accuracy without additional filtering components.
In a wearable device operating from a single-cell LiPo battery at 4.5 V to 5.5 V, how does the TPS73643DBVTG4's 75 mV dropout voltage affect usable battery capacity?
With only 75 mV typical dropout, the TPS73643DBVTG4 continues to regulate correctly down to an input of output-voltage plus 75 mV, extracting more usable energy from a LiPo cell compared to LDOs with 300 mV or higher dropout. In a wearable drawing 200 mA average current, this 225 mV improvement in minimum input headroom translates to additional minutes to hours of operation before the battery voltage drops below the regulation threshold.
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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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