TPS5450DDAR - 5A 36V Buck Converter 500kHz | TI
MPN: TPS5450DDAR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.02 | $4.02 |
| 10 | $3.62 | $36.20 |
| 100 | $3.15 | $315.00 |
| 500 | $2.72 | $1,360.00 |
| 1,000 | $2.38 | $2,380.00 |
Drop-in alternatives for TPS5450DDAR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS5450DDA
β Drop-Inπ Reference alternative (not in catalog)
TPS5450DDARG4
β Drop-Inπ Reference alternative (not in catalog)
TPS5450MDDAREP
β Drop-Inπ Reference alternative (not in catalog)
TPS54560DDAR
β Drop-Inπ Reference alternative (not in catalog)
TPS54620
β‘ Same Packageβ In Stock
$2.19 / Unit
View Datasheet βTPS5450DDAR Maximum Ratings & Electrical Characteristics
| Topology | Buck (Step-Down) |
| Input Voltage Range | 5.5 V to 36 V |
| Output Voltage Range | 1.22 V to 31 V |
| Maximum Output Current | 5 A |
| Switching Frequency | 500 kHz (fixed) |
| Number of Outputs | 1 |
| Output Type | Adjustable |
| Integrated MOSFET | High-side N-channel, low Rds(on) |
| Control Architecture | Voltage-mode PWM (internally compensated) |
| Enable Pin | Yes |
| Protection Features | Overcurrent, thermal shutdown |
| Package | HSOIC-8 PowerPAD (DDA), 3.90 mm width |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Family | SWIFT DC/DC regulators |
| RoHS Status | Compliant |
TPS5450DDAR Pin Configuration
| Pin 1 | BOOT β Bootstrap capacitor connection for high-side gate driver |
| Pin 2 | VIN β Input supply voltage, 5.5V to 36V |
| Pin 3 | EN β Enable input with internal pullup |
| Pin 4 | SS/TR β Soft-start and output voltage tracking |
| Pin 5 | VSENSE β Feedback voltage sense input for regulation |
| Pin 6 | GND β Ground reference (also PowerPAD) |
| Pin 7 | COMP β Error amplifier output for loop compensation |
| Pin 8 | PWRGD β Open-drain power-good status output |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS5450DDAR is suitable for 6 applications: Point-of-Load Conversion for FPGAs and DSPs, Industrial Automation Power Supplies, Telecom and 24V Distributed Power, Automotive 12V Accessory Rails, Test and Measurement Instrumentation, Point-of-Load for Embedded Computing.
Point-of-Load Conversion for FPGAs and DSPs
The TPS5450DDAR's 5A output current and 500kHz switching frequency make it well suited to generate core and I/O rails for FPGAs, DSPs, and microcontrollers from 12V or 24V intermediate buses. The 1.22V minimum output directly supports low-voltage cores, while the enable pin and soft-start (SS/TR) pin allow sequenced power-up required by multi-rail processors. Its >90% efficiency reduces board-level heat, and the integrated MOSFET eliminates an external power stage, shrinking POL solution size.
Recommended
Industrial Automation Power Supplies
With a 36V maximum input, the TPS5450DDAR converts 24V industrial control rails with comfortable transient headroom for PLC modules, motor-drive logic, and sensor interfaces. The fixed 500kHz switching keeps EMI filtering manageable, and cycle-by-cycle overcurrent plus thermal shutdown protect against fault conditions common on factory floors. The DDA PowerPAD package sustains full 5A loads in sealed enclosures when paired with proper copper pours.
Recommended
Telecom and 24V Distributed Power
Telecom intermediate bus and 24V distributed power systems benefit from the TPS5450DDAR's wide 5.5V to 36V input range and tight voltage regulation via its high-performance voltage error amplifier. The 500kHz switching frequency permits compact inductors, and the PowerPAD package thermal performance supports high ambient temperatures typical of telecom equipment. The PWRGD output enables downstream rail monitoring and fault reporting in managed power systems.
Recommended
Automotive 12V Accessory Rails
The TPS5450DDAR's 36V input tolerance accommodates automotive 12V accessory rails including load-dump-adjacent transients when paired with adequate input protection. Its 5A capability supplies infotainment subsystems, camera modules, and body-control logic. The enable pin supports ignition-controlled power sequencing, and the TPS5450MDDAREP enhanced-product variant offers extended reliability screening for demanding vehicle environments.
Recommended
Test and Measurement Instrumentation
Bench instruments and modular test systems use the TPS5450DDAR to derive clean 5A logic and analog rails from 12V or 24V supplies. The internally compensated voltage-mode control simplifies loop design for quick platform reuse across instrument variants, while soft-start via the SS/TR pin prevents input inrush during instrument power-up. Tight regulation supports accurate downstream ADC and reference circuitry.
Recommended
Point-of-Load for Embedded Computing
Embedded computing boards such as ARM and x86 modules require multiple medium-current rails; the TPS5450DDAR handles 5A rails efficiently from a 12V input while the PWRGD pin supports power-good sequencing chains across converters. The >90% efficiency at mid loads limits convection cooling requirements in fanless embedded systems, and the widely documented SWIFT design procedure shortens board spin cycles.
Recommended
Recommended Products Summary
Engineering reference data for TPS5450DDAR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS5450DDA | TPS5450DDARG4 | TPS5450MDDAREP | TPS54560DDAR |
|---|---|---|---|---|---|
| Package | HSOIC-8 PowerPAD (DDA) | HSOIC-8 PowerPAD (DDA) - same | HSOIC-8 PowerPAD (DDA) - same | HSOIC-8 PowerPAD (DDA) - same | HSOIC-8 PowerPAD (DDA) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 36 V | 4.5 V to 60 V |
| Output Current | 5 A | 5 A | 5 A | 5 A | 5 A |
| Switching Frequency | 500 kHz (fixed) | 500 kHz (fixed) | 500 kHz (fixed) | 500 kHz (fixed) | [DATA_NEEDED] |
| Output Voltage Range | 1.22 V to 31 V | 1.22 V to 31 V | 1.22 V to 31 V | 1.22 V to 31 V | [DATA_NEEDED] |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
| Reliability Grade | Standard | Standard | Standard (G4 lead-free) | Enhanced Product | Standard |
Key Differentiators
- Widest input headroom within pin-similar SWIFT family members (vs TPS54620)
- Full 5A continuous output in compact SO-8 footprint (vs TPS54331DR)
- Enhanced product variant available with identical footprint (vs TPS5450MDDAREP)
Design Notes
The PowerPAD on the DDA package is the primary thermal path and must be soldered to a copper pour. Per TI datasheet SLVS618 layout guidance, use a minimum 4x4 via array (8 mil holes) connecting the PowerPAD to internal ground planes. At VIN=24V, VOUT=5V, 5A load, dissipation exceeds 8W; verify junction temperature stays below 125C with measured theta_JA.
Keep the BOOT capacitor (0.1uF ceramic) as close as possible between BOOT and VIN/PH. Minimize the loop area from VIN input capacitor to PH to GND to reduce EMI. Place the VSENSE feedback divider away from the PH switching node to avoid coupling switching noise into regulation.
Use the SS/TR pin with a soft-start capacitor to limit inrush current on high-capacitance loads; without it, startup current limit may trip. The EN pin has an internal pullup - pull it low for controlled enable or use a resistor divider to implement input undervoltage lockout.
Do not exceed 36V absolute maximum input including transients - add TVS protection on automotive or industrial 24V rails. Inductor saturation current must exceed the converter's current limit, not just the 5A operating current; undersized inductors cause startup failures.
Compliance Information
RoHS compliant and lead-free per TI product page; TPS5450DDARG4 is the explicit lead-free suffix variant. AEC-Q100 qualification not stated for standard TPS5450.
