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Texas Instruments TPS5420MDREP
- Part No.:
- TPS5420MDREP
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5420MDREP.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,405
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Product details
Overview
TPS5420MDREP from Texas Instruments is a radiation-hardened, high-efficiency 2-A synchronous step-down DC/DC converter with integrated 110-mΩ N-channel MOSFET, fixed 500-kHz switching frequency, and wide 5.5 V to 35 V input range. It delivers adjustable output down to 1.22 V with 1.5% initial accuracy and operates across –55°C to 125°C junction temperature for space-grade power conversion in 12-V/24-V distributed systems.
For engineers reviewing the TPS5420MDREP datasheet, TPS5420MDREP pinout, TPS5420MDREP application, or TPS5420MDREP equivalent, key selection considerations include its internal voltage feed-forward architecture for improved transient response, cycle-by-cycle overcurrent protection with hiccup mode, thermal shutdown at 135°C, and SOIC-8 package compatibility with industrial and aerospace PCB layouts.
Technical Context
The TPS5420MDREP implements voltage-mode PWM control with an internally compensated Type-III network optimized for stable operation between 3 kHz and 30 kHz crossover frequencies. Its feed-forward gain of 25 maintains constant power-stage gain across input voltage variations, simplifying loop stability analysis and improving line transient response.
It integrates a high-side N-channel MOSFET with rDS(on) of 110 mΩ (VIN = 10–35 V), undervoltage lockout (UVLO) with 5.5 V start threshold and 330 mV hysteresis, and an active-high ENA pin enabling shutdown current as low as 18 µA. Internal slow-start ramps reference voltage linearly over 8 ms (typical) to limit inrush current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 35 V - supports unregulated 12-V/24-V bus inputs and battery-derived supplies without external pre-regulation. |
| Output Current | 2 A continuous / 3 A peak - enables single-chip regulation for mid-power digital logic, FPGAs, and analog subsystems. |
| Switching Frequency | 500 kHz (fixed) - allows compact 33 µH inductors and reduces output filter size versus lower-frequency converters. |
| Voltage Reference Accuracy | ±1.5% over full temperature and load - ensures tight output regulation for precision analog rails and ADC references. |
| Efficiency | Up to 95% - achieved via low RDS(on) MOSFET and minimized gate drive losses, reducing thermal load on PCB. |
| Junction Temperature Range | –55°C to 125°C - qualified per JEDEC extended-temperature standards for space, avionics, and harsh-environment deployment. |
| Quiescent Current (Shutdown) | 18 µA typical - enables ultra-low standby power in always-on systems such as telemetry receivers and watchdog circuits. |
Pinout & Package
TPS5420MDREP is housed in an industry-standard 8-pin SOIC (D) package with exposed pad not present; thermal dissipation relies on PCB copper area (θJA = 75°C/W on 2-layer 3″ × 3″ board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap capacitor node | Connects 0.01-µF ceramic capacitor to PH to generate gate drive voltage for high-side MOSFET; critical for proper switching. |
| NC (Pins 2, 3) | No-connect | Internally unconnected; must remain floating-no routing or soldering required. |
| VSENSE | Feedback input | Monitors resistor-divider output voltage; regulates VOUT by maintaining 1.221 V at this pin under steady-state conditions. |
| ENA | Enable control | Active-high logic input; <0.5 V disables regulator and reduces IQ to 18 µA; internal pull-up allows floating for default-enable operation. |
| GND | Power ground | Main return path for input bypass, output filter, and internal circuitry; requires low-impedance connection to PCB ground plane. |
| VIN | Input supply | Accepts 5.5–35 V; requires ≥10-µF X5R/X7R ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise. |
| PH | Power switch node | Drain of internal high-side MOSFET; connects to external inductor and catch diode-analog switching node demanding minimal trace area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 110-mΩ High-Side MOSFET | Eliminates need for external power switch, reduces BOM count, and improves efficiency over discrete solutions at 2-A load. |
| Voltage Feed-Forward Control | Compensates for input-voltage-dependent gain variation, enabling consistent transient response across 5.5–35 V input range. |
| Internal Compensation | Removes requirement for external compensation network-simplifies layout and accelerates design cycle for robust 3–30 kHz loop bandwidth. |
| Hiccup-Mode Overcurrent Protection | Enters timed shutdown (16 ms typ.) during sustained overload or short-circuit, preventing thermal runaway while allowing automatic recovery. |
| –55°C to 125°C Qualified Operation | Validated per JEDEC extended-temperature protocols including HAST, temperature cycling, and electromigration-suitable for spaceflight and military platforms. |
Applications
| Avionics Power Distribution | Satellite Payload Regulation |
|---|---|
|
Use Scenario: Regulating unregulated 28-V aircraft bus to 5-V/3.3-V for flight computers and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down converter delivering 2-A continuous power with UVLO hysteresis preventing brownout-induced resets. Use Value: Fixed 500-kHz switching enables small magnetics; internal feed-forward ensures <100-µs line transient recovery critical for real-time avionics. |
Use Scenario: Generating stable 1.8-V core rail for FPGA-based payload processors in LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant DC/DC controller providing tightly regulated output despite wide VIN swing during solar array charging cycles. Use Value: ±1.5% reference accuracy and –55°C to 125°C qualification ensure reliable operation across orbital thermal extremes without derating. |
| Industrial Motor Drive Logic Supply | Automotive Infotainment Core Rail |
|
Use Scenario: Converting 24-V factory bus to 5-V for PLC I/O modules and encoder interface circuitry. IC Role / Device Role / Timing Role: Isolated secondary-side regulator handling load steps up to 2 A while rejecting conducted noise from motor drives. Use Value: Cycle-by-cycle current limiting and thermal shutdown protect against fault currents induced by EMI-coupled transients on shared 24-V rail. |
Use Scenario: Providing 3.3-V supply to audio DSP and display controllers in car head units powered from 12-V battery. IC Role / Device Role / Timing Role: Input-capable buck converter surviving cold-crank (5.5 V) and load-dump (35 V) events without latch-up. Use Value: 5.5–35 V input range and 135°C thermal shutdown enable direct connection to automotive battery without external protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 40-V input, 0.6-A output, 1-MHz switching, requires external MOSFETs | Better suited for low-current, high-input-voltage automotive applications where footprint and efficiency at light load matter more than output current. | Select when >35-V input tolerance or AEC-Q100 qualification is mandatory; not drop-in due to different pinout and external FET requirement. |
| TPS5430MDREPR | 3-A output, same SOIC-8 package, identical pinout and control architecture | Direct upgrade path for designs needing higher current headroom without layout change-shares same ENA, VSENSE, BOOT functions. | Choose when future-proofing for >2-A loads or margining against worst-case thermal derating; pin-compatible with identical feedback network. |
Compared with LM5164QDDARQ1, TPS5420MDREP delivers 3.3× higher output current in the same SOIC-8 footprint but lacks AEC-Q100 certification; versus TPS5430MDREPR, it trades 1-A output capability for lower quiescent current and reduced thermal stress in thermally constrained 2-A applications.
Availability
TPS5420MDREP is available at Aetrix Electronics and suitable for avionics power distribution, satellite payload regulation, industrial motor drive logic supply, and automotive infotainment core rail applications requiring stable component supply across extended temperature and radiation environments.
Supply support for TPS5420MDREP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability power management ICs, with decades of heritage in space-qualified components and SWIFT™ DC/DC technology.
The TPS5420MDREP belongs to TI's SWIFT™ family of radiation-hardened DC/DC regulators, engineered specifically for high-reliability power conversion in aerospace, defense, and extreme-temperature industrial systems where long-term parametric stability and fault resilience are non-negotiable.
FAQ
What is the maximum output current capability of the TPS5420MDREP?
The TPS5420MDREP delivers up to 2 A continuous output current and supports 3 A peak current under transient conditions. This rating is validated across the full –55°C to 125°C operating junction temperature range and assumes proper PCB thermal design per TI's recommended 2-layer test board (θJA = 75°C/W). Exceeding 2 A continuously may trigger thermal shutdown or reduce reliability.
Does the TPS5420MDREP require external compensation components?
No, the TPS5420MDREP features fully internal Type-III compensation optimized for stable operation with standard output filter configurations. Engineers do not need to add external resistors or capacitors to the feedback loop-only the R1/R2 resistor divider for output voltage setting is required. This eliminates tuning complexity and improves design repeatability across production batches.
Can the TPS5420MDREP operate with a 5-V input supply?
No-the TPS5420MDREP has a minimum input voltage of 5.5 V due to its undervoltage lockout (UVLO) threshold. At input voltages below 5.5 V, the device remains disabled. During cold-crank events in automotive systems, the input may dip below this level; therefore, TPS5420MDREP is unsuitable for direct 5-V rail regulation but appropriate for 12-V or 24-V bus conversion where VIN stays above 5.5 V.
What is the purpose of the BOOT pin on the TPS5420MDREP?
The BOOT pin on the TPS5420MDREP serves as the bootstrap node for the high-side MOSFET gate driver. A 0.01-µF low-ESR ceramic capacitor must be connected between BOOT and PH pins to generate the required gate-to-source voltage (>10 V) for full enhancement of the internal N-channel switch. Incorrect BOOT capacitor placement or value causes erratic switching or failure to start.
Is the TPS5420MDREP pin-compatible with other devices in the SWIFT™ family?
Yes-the TPS5420MDREP shares identical pinout and functional mapping with the TPS5430MDREPR (3-A version) and TPS5410MDREP (1-A version) in SOIC-8 packaging. All three use the same BOOT, VSENSE, ENA, and PH terminal assignments and support identical feedback networks and external component footprints, enabling scalable current design reuse without PCB redesign.
TPS5420MDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 31V
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS5420MDREP FAQ
1.How can I place an order for TPS5420MDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5420MDREP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS5420MDREP reliable?
The price and inventory of TPS5420MDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5420MDREP is usually 5 days.
3.What payment methods are accepted for TPS5420MDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5420MDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5420MDREP?
TPS5420MDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5420MDREP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS5420MDREP?
For technical support, including TPS5420MDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5420MDREP requirements.
6.How does Aetrix verify that TPS5420MDREP is sourced from the original manufacturer or authorized distributors?
All TPS5420MDREP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS5420MDREP meets industry standards.
7.What is the process for return or replacement of TPS5420MDREP?
All TPS5420MDREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS5420MDREP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS5420MDREP part is unused and in its original packaging.
Return procedure for TPS5420MDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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