TPS70451PWPG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TPS70451PWPG4 is a dual fixed-output LDO linear voltage regulator providing 1.8 V and 3.3 V outputs at up to 2 A total current from a 3.6 V to 6 V input. It features a 250 mV maximum dropout voltage, ±2% output accuracy, and a 24-pin HTSSOP package for compact power supply designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- TPS70451PWPG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS70451PWPG4?
- Dual fixed LDO outputs: 1.8 V and 3.3 V simultaneously
- Total output current up to 2 A across both channels
- Maximum dropout voltage of 250 mV for low-headroom operation
- Input voltage range: 3.616 V to 6 V (7 V absolute max)
- Output voltage accuracy ±2% over temperature and load
- Line regulation maximum 0.0059% for stable output
- 24-pin HTSSOP package (R-PDSO-G24) with thermal pad
- RoHS-compliant e4 lead-free construction
What is TPS70451PWPG4 used for?
TPS70451PWPG4 is designed for embedded systems requiring simultaneous 1.8 V and 3.3 V regulated rails from a single 5 V or battery-derived supply, such as FPGA auxiliary power, wireless module supplies, and portable consumer electronics. Its 250 mV low dropout voltage extends battery runtime in handheld devices by allowing operation as the input voltage approaches the output, making it well-suited for Li-ion battery-powered instruments and IoT sensor nodes. The dual-output architecture reduces BOM complexity compared to two separate single-channel LDOs.
What are the specifications of TPS70451PWPG4?
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.25V |
| Dropout Voltage1-Nom | 0.16V |
| Input Voltage Absolute-Max | 7V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 3.616V |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.0059% |
| Number of Functions | 1 |
| Number of Outputs | 2 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Current2-Max | 2A |
| Output Voltage1-Max | 3.366V |
| Output Voltage1-Min | 3.234V |
| Output Voltage1-Nom | 3.3V |
| Output Voltage2-Max | 1.836V |
| Output Voltage2-Min | 1.764V |
| Output Voltage2-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP24,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | PMOS |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the TPS70451PWPG4 datasheet?
TPS70451PWPG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS70451PWPG4?
Compatible alternatives and drop-in replacements for TPS70451PWPG4:
Frequently Asked Questions
Can TPS70451PWPG4 simultaneously supply a 1.8 V microcontroller core and a 3.3 V I/O bus from a single 5 V rail?
Yes, TPS70451PWPG4 provides fixed 1.8 V and 3.3 V outputs simultaneously from a 3.616 V to 6 V input, making a 5 V supply fully compatible. Both outputs are regulated to ±2% accuracy, covering the tolerance budgets of 1.8 V FPGA cores and 3.3 V logic I/O buses. The 2 A combined output current and 250 mV maximum dropout voltage allow both rails to remain regulated even when the 5 V input sags to approximately 3.6 V under heavy load.
How does the 250 mV dropout voltage on TPS70451PWPG4 extend battery life in portable IoT devices?
A 250 mV maximum dropout voltage means TPS70451PWPG4 continues regulating its 3.3 V output as long as the battery voltage remains above approximately 3.55 V, compared to 500 mV to 1 V dropout in conventional LDOs that would cut off much earlier in the battery discharge curve. This additional usable capacity translates directly to longer sensor node uptime per charge cycle. For a 3.7 V Li-ion cell, the device can sustain regulated 3.3 V output through the majority of the cell's useful discharge range.
What is the line regulation specification of TPS70451PWPG4 and why does it matter in noisy power environments?
TPS70451PWPG4 achieves a maximum line regulation of 0.0059%, meaning a 1 V change in input voltage causes less than 0.2 mV shift on the output rail. In applications such as industrial sensor nodes powered from switching converters with ripple on the 5 V bus, this tight line regulation ensures the downstream 1.8 V and 3.3 V rails remain stable within the ±2% output tolerance. It reduces the need for additional input filtering before the LDO in moderately noisy supply environments.
How does TPS70451PWPG4 compare to using two separate single-output LDOs for a dual-rail power supply design?
Using TPS70451PWPG4 consolidates both 1.8 V and 3.3 V regulation into a single 24-pin HTSSOP device, reducing PCB footprint and component count versus two separate 8-pin or 5-pin single-output LDOs. The thermal pad on the HTSSOP package also provides a single centralized heat path to the PCB ground plane, simplifying thermal management for the combined 2 A load. The trade-off is that both output voltages are fixed, so designs requiring adjustable output rails must use alternative regulators.
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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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