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Texas Instruments TPS5420MDREPG4
- Part No.:
- TPS5420MDREPG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5420MDREPG4.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
TPS5420MDREPG4 from Texas Instruments is a radiation-hardened, wide-input-range 2-A synchronous step-down DC/DC converter with integrated 110-mΩ high-side N-channel MOSFET, fixed 500-kHz switching frequency, and internal compensation. It operates from 5.5 V to 35 V input and delivers adjustable output down to 1.22 V with ±1.5% initial accuracy, supporting industrial power supplies and battery-charged LED drivers.
For engineers reviewing the TPS5420MDREPG4 datasheet, TPS5420MDREPG4 pinout, TPS5420MDREPG4 application, or TPS5420MDREPG4 equivalent, key selection criteria include its -55°C to 125°C operating junction temperature, cycle-by-cycle overcurrent protection with hiccup mode, thermal shutdown at 135°C, and ENA-controlled shutdown current of 18 µA - all critical for space-grade and harsh-environment power design.
Technical Context
The TPS5420MDREPG4 implements voltage-mode PWM control with internal type-3 compensation, eliminating external loop components. Its voltage feed-forward circuit maintains constant power-stage gain across input voltage variations, improving transient response and simplifying stability analysis.
It integrates undervoltage lockout (UVLO) with 5.5 V start threshold and 330 mV hysteresis, an internal slow-start ramp (8 ms typical), and a precision 1.221 V bandgap reference trimmed at room temperature. The PH pin serves as the high-side MOSFET source node, requiring external inductor, catch diode, and boot capacitor (0.01 µF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 35 V - supports 12 V/24 V distributed systems and wide-range industrial inputs without pre-regulation. |
| Output Current | 2 A continuous / 3 A peak - enables single-chip conversion for mid-power loads like LCD displays and car audio amplifiers. |
| Switching Frequency | Fixed 500 kHz - allows smaller output inductors (e.g., 33 µH) and reduces EMI filtering complexity. |
| Voltage Reference Accuracy | ±1.5% initial tolerance at 1.221 V - ensures tight output regulation under load transients and temperature extremes. |
| Quiescent Current (Shutdown) | 18 µA typical - minimizes standby power loss in battery-backed or always-on systems. |
| Thermal Shutdown Threshold | 135°C trip point with 14°C hysteresis - provides robust self-protection during overload or poor heatsinking conditions. |
| High-Side rDS(on) | 110 mΩ at VIN ≥ 10 V - contributes to up to 95% efficiency and reduces thermal stress on SOIC package. |
Pinout & Package
TPS5420MDREPG4 is housed in an 8-pin SOIC (D) package with exposed pad not electrically connected. Thermal impedance is 75°C/W (junction-to-ambient, 2-layer PCB). Pin functions are validated per TI SLVS717 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap capacitor node | Connects 0.01-µF low-ESR ceramic capacitor to PH pin to generate gate drive voltage for high-side MOSFET. |
| NC (2, 3) | No-connect terminals | 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. |
| ENA | Enable control | Active-high logic input; < 0.5 V disables regulator and reduces IQ to 18 µA; floating enables operation. |
| GND | Power ground reference | Primary return path for IC core, MOSFET source, and external components; requires low-impedance PCB plane. |
| VIN | Main input supply | Accepts 5.5–35 V; requires local 10-µF X5R/X7R ceramic bypass capacitor placed adjacent to pin. |
| PH | Phase node / switch output | Drives external inductor and catch diode; high dv/dt switching node - demands minimized trace area and proximity to L/D/COUT. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 110-mΩ high-side MOSFET | Eliminates external switch, reduces BOM count, and improves thermal performance in compact SOIC layout. |
| Internal voltage feed-forward | Maintains constant modulator gain across VIN range, enabling predictable transient response without re-tuning compensation. |
| Cycle-by-cycle overcurrent protection | Detects MOSFET VDS during each switching cycle, limiting peak current to 3–5.2 A and preventing catastrophic failure. |
| Hiccup-mode fault recovery | After sustained overcurrent, enters timed shutdown (13–22 ms) before automatic restart - prevents thermal runaway. |
| Internal slow-start (6.6–10.6 ms) | Ramps reference voltage linearly to limit inrush current into output capacitors and avoid input rail sag. |
Applications
| Industrial Power Supplies | Battery-Charged LED Drivers |
|---|---|
|
Use Scenario: Distributed 24-V rail powering programmable logic controllers and sensor interfaces in factory automation. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 5 V/2 A to microcontroller and I/O peripherals. Use Value: Wide 5.5–35 V input accommodates brownout and surge conditions; -55°C to 125°C rating ensures reliability in uncontrolled enclosures. |
Use Scenario: Portable medical device using Li-ion battery pack (10–21 V) to drive high-brightness white LEDs. IC Role / Device Role / Timing Role: Constant-current-capable buck converter regulating LED string voltage via feedback divider tuning. Use Value: Adjustable output down to 1.22 V enables precise current-sense resistor biasing; 95% efficiency extends battery runtime. |
| Car Audio Amplifier Supplies | 12-V/24-V Distributed Systems |
|
Use Scenario: Aftermarket head unit supplying clean 5 V to DSP and display subsystems amid automotive load-dump transients. IC Role / Device Role / Timing Role: Secondary buck stage isolating sensitive electronics from noisy 12 V battery rail. Use Value: UVLO hysteresis (330 mV) prevents erratic startup during cranking; thermal shutdown protects against enclosure overheating. |
Use Scenario: Telecom remote radio unit powered from centralized 24 V backplane with strict ripple and efficiency requirements. IC Role / Device Role / Timing Role: Point-of-load regulator converting 24 V to 3.3 V for FPGA and PHY ICs. Use Value: Fixed 500-kHz frequency enables consistent EMI filter design across multiple boards; internal compensation reduces layout sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54202DRCT | Commercial-grade (–40°C to 125°C), same 500-kHz frequency and 2-A rating but lacks EP qualification and extended temp range. | Not suitable for space, military, or extended-temperature industrial use; lower cost for commercial consumer designs. | Select only when radiation hardness, DMS support, and –55°C operation are unnecessary. |
| LM2678SDX-5.0/NOPB | Fixed 5 V output (non-adjustable), 5-A rating, 260 kHz switching, external compensation required. | Better suited for higher-current, fixed-output applications where board space permits larger inductor and compensation network. | Choose when output voltage is fixed at 5 V and higher current capability outweighs need for compactness and internal compensation. |
Compared with TPS5420MDREPG4, TPS54202DRCT trades radiation hardening and extended temperature for lower cost and availability, while LM2678SDX-5.0/NOPB offers higher current and fixed output but increases design complexity with external loop components and lower switching frequency.
Availability
TPS5420MDREPG4 is available at Aetrix Electronics and suitable for industrial power supplies, battery-charged LED drivers, and car audio amplifier supplies requiring stable component supply across extended temperature and radiation-hardened environments.
Supply support for TPS5420MDREPG4 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 and embedded processing technologies, with decades of heritage in power management innovation and aerospace-grade component qualification.
The TPS5420MDREPG4 belongs to TI's SWIFT™ family of high-current DC/DC regulators, engineered specifically for ruggedized, wide-input industrial and defense applications demanding high efficiency, internal compensation, and extended temperature operation.
FAQ
What is the absolute maximum input voltage rating for the TPS5420MDREPG4?
The TPS5420MDREPG4 has an absolute maximum VIN rating of 38 V. Exceeding this voltage risks permanent damage to the internal high-side MOSFET and control circuitry. Recommended operating input range remains 5.5 V to 35 V per datasheet specifications. Always include input transient suppression if system-level surges may approach the 38 V limit.
Does the TPS5420MDREPG4 require external compensation components?
No, the TPS5420MDREPG4 features fully internal type-3 compensation optimized for voltage-mode control. This eliminates external resistors and capacitors from the feedback loop, reducing BOM count and layout sensitivity. Designers must still select appropriate output LC values within the supported range (e.g., 10–100 µH inductor, 10–100 µF capacitor) to maintain stability.
How does the ENA pin function on the TPS5420MDREPG4?
The ENA pin on the TPS5420MDREPG4 is an active-high enable input with 1.3 V typical turn-on threshold and 0.5 V turn-off threshold. When pulled below 0.5 V, the device halts switching and enters shutdown mode with 18 µA quiescent current. Floating the pin enables operation via internal pull-up. Open-drain logic is recommended for reliable interfacing.
What is the purpose of the BOOT pin on the TPS5420MDREPG4?
The BOOT pin on the TPS5420MDREPG4 supplies gate drive voltage to the integrated high-side N-channel MOSFET. A 0.01-µF low-ESR ceramic capacitor must be connected between BOOT and PH pins to form a charge pump. X7R or X5R dielectrics are specified for stable capacitance across temperature and bias voltage.
Can the TPS5420MDREPG4 operate at ambient temperatures below –40°C?
Yes, the TPS5420MDREPG4 is qualified for operation from –55°C to 125°C junction temperature, making it suitable for cryogenic industrial and space applications. Its enhanced product-change notification, controlled baseline, and JEDEC-qualified pedigree ensure reliability under extreme thermal cycling and long-term storage conditions beyond commercial-grade parts.
TPS5420MDREPG4 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:
- Discontinued at Digi-Key
- 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
TPS5420MDREPG4 FAQ
1.How can I place an order for TPS5420MDREPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5420MDREPG4 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 TPS5420MDREPG4 reliable?
The price and inventory of TPS5420MDREPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5420MDREPG4 is usually 5 days.
3.What payment methods are accepted for TPS5420MDREPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5420MDREPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5420MDREPG4?
TPS5420MDREPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5420MDREPG4 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 TPS5420MDREPG4?
For technical support, including TPS5420MDREPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5420MDREPG4 requirements.
6.How does Aetrix verify that TPS5420MDREPG4 is sourced from the original manufacturer or authorized distributors?
All TPS5420MDREPG4 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 TPS5420MDREPG4 meets industry standards.
7.What is the process for return or replacement of TPS5420MDREPG4?
All TPS5420MDREPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS5420MDREPG4, 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 TPS5420MDREPG4 part is unused and in its original packaging.
Return procedure for TPS5420MDREPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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