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Texas Instruments TPS5420QDRQ1
- Part No.:
- TPS5420QDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5420QDRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,652
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Product details
Overview
TPS5420QDRQ1 from Texas Instruments is an automotive-grade, 2A synchronous step-down DC/DC converter with integrated 110mΩ high-side N-channel MOSFET, 5.5V–36V input range, and adjustable 1.22V output (±1.5% initial accuracy). It delivers up to 95% efficiency at 500kHz fixed switching frequency and operates across –40°C to 125°C junction temperature for engine control unit and infotainment power rails.
For engineers reviewing the TPS5420QDRQ1 datasheet, TPS5420QDRQ1 pinout, TPS5420QDRQ1 application, or TPS5420QDRQ1 equivalent, key selection considerations include its AEC-Q100 qualification, internal compensation, voltage feed-forward architecture, hiccup-mode overcurrent protection, and SOIC-8 thermal performance under 12V/24V automotive transients.
Technical Context
The TPS5420QDRQ1 implements voltage-mode PWM control with integrated voltage feed-forward to maintain constant power-stage gain across input voltage variations-enabling stable transient response in 12V/24V vehicle systems. Its internal 1.221V reference is trimmed for ±1.5% accuracy over temperature, and the error amplifier features type-3 internal compensation to eliminate external compensation components.
Startup is managed by a 5.5V UVLO with 330mV hysteresis and an 8ms internal slow-start ramp; shutdown draws only 18μA via the ENA pin, which includes a 1.5MΩ internal pullup. Overcurrent protection uses cycle-by-cycle sensing of high-side MOSFET RDS(on), entering hiccup mode during sustained faults, while thermal shutdown activates at 135°C with 14°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 36V - supports direct connection to automotive battery rails including cold-crank (6.0V) and load-dump (36V) conditions. |
| Output Current | 2A continuous / 3A peak - enables single-chip 5V/3.3V supplies for microcontrollers, sensors, and audio amplifiers without external current boosting. |
| Switching Frequency | Fixed 500kHz - allows compact 3.3µH–10µH inductors and reduces EMI filtering burden versus lower-frequency buck converters. |
| Feedback Reference | 1.221V ±1.5% - sets minimum output voltage; combined with external resistor divider, enables precise 3.3V, 5V, or custom outputs. |
| High-Side RDS(on) | 110mΩ typical at 12V VIN - contributes directly to ≥95% peak efficiency and limits conduction loss in high-current automotive loads. |
| Junction Temperature | –40°C to 125°C - qualified per AEC-Q100 Grade 1, enabling placement near heat sources like powertrain ECUs or head-unit processors. |
| Quiescent Current | 4.4mA typical in operation; 18μA in shutdown - meets low-power requirements for always-on modules such as CAN gateways or telematics. |
Pinout & Package
TPS5420QDRQ1 is housed in an industry-standard 8-pin SOIC (D package), 4.9mm × 6mm footprint, with exposed pad not present. Thermal resistance is 75°C/W on custom PCB and 106°C/W per JESD 51-7, supporting 2A operation without forced airflow in automotive enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOT | Bootstrap capacitor node | Connects 0.01µF X7R/X5R ceramic capacitor to PH; supplies gate drive voltage for integrated high-side MOSFET. |
| 2,3 - NC | No-connect terminals | Internally unconnected; must remain floating-no routing or soldering required. |
| 4 - VSENSE | Feedback input | Monitors output voltage divider midpoint; regulates output by comparing to 1.221V internal reference. |
| 5 - ENA | Enable control | Active-high logic input; >1.3V enables regulation, <0.5V disables with 18μA shutdown current; internal 1.5MΩ pullup allows floating operation. |
| 6 - GND | Power ground | Primary return path for high-side switch, IC bias, and feedback network; requires low-inductance connection to power plane. |
| 7 - VIN | Main input supply | Accepts 5.5V–36V; bypassed with ≥10µF ceramic capacitor close to pin to suppress high-frequency ripple and EMI. |
| 8 - PH | Power switch node | Drain of integrated high-side MOSFET; connects to external inductor and catch diode (or synchronous rectifier in full-buck designs). |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - validated for use in safety-critical and mission-relevant automotive subsystems including ADAS domain controllers. |
| Voltage feed-forward | Fixed 25× feed-forward gain - dynamically adjusts PWM ramp amplitude to stabilize loop gain across 5.5V–36V input, improving line transient response by >40% vs non-feed-forward buck ICs. |
| Internal compensation | Type-3 network integrated on-die - eliminates need for external compensation components (e.g., R-C-Z networks), reducing BOM count and layout sensitivity. |
| Hiccup-mode OCP | 16ms typical hiccup interval - limits average power dissipation during sustained short-circuit or overload, preventing thermal runaway in sealed automotive enclosures. |
| Thermal shutdown | 135°C trip with 14°C hysteresis - protects silicon integrity during prolonged high-load operation; automatic recovery avoids manual reset in inaccessible locations. |
Applications
| Engine Control Unit (ECU) Power Rail | Infotainment System Core Supply |
|---|---|
|
Use Scenario: Powers 3.3V/5V domains in gasoline/diesel engine control units exposed to wide ambient temperatures and battery transients. IC Role / Device Role / Timing Role: Primary step-down regulator converting 12V battery to stable 3.3V for MCU, CAN transceivers, and sensor interfaces. Use Value: UVLO hysteresis and 125°C junction rating ensure reliable startup during cold cranking; internal compensation maintains stability despite ECU board-level EMI. |
Use Scenario: Supplies 5V to DSPs, audio codecs, and display controllers in automotive head units and digital clusters. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter delivering 2A at 5V from 12V distribution bus. Use Value: 500kHz switching enables small 4.7µH inductors and low-profile 100µF output capacitors, meeting strict height constraints in slim head-unit chassis. |
| ADAS Camera Module Power | Telematics Control Unit (TCU) Backup Supply |
|
Use Scenario: Provides clean 3.3V rail to CMOS image sensors and ISP processors in forward-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: Low-noise, thermally robust buck converter operating continuously in high-temperature cabin environments. Use Value: 95% efficiency minimizes self-heating; 1.221V reference accuracy ensures consistent ADC reference for sensor signal chain calibration. |
Use Scenario: Delivers regulated 3.3V to real-time clock, secure element, and low-power MCU in TCUs during ignition-off battery-saver mode. IC Role / Device Role / Timing Role: Always-on auxiliary regulator with ultra-low shutdown current (18μA) and fast wake-up capability. Use Value: ENA pin enables controlled entry/exit from low-power state; internal slow-start prevents voltage overshoot during wake-up from deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678SD-5.0/NOPB | 5V fixed output, no adjustable feedback; 5.5V–40V input; 5A rating; no AEC-Q100 qualification. | Suitable for non-automotive industrial 5V supplies where fixed output suffices and higher current headroom is needed. | Select when fixed 5V output and higher current (5A) are prioritized over automotive qualification and adjustable VOUT. |
| MPQ4312-AEC1 | 2A, 3.5V–36V input; 500kHz; AEC-Q100 Grade 1; integrated soft-start and light-load efficiency optimization. | Better light-load efficiency than TPS5420QDRQ1 but lacks voltage feed-forward and has lower max input voltage (36V vs 36V same, but tighter min-VIN spec). | Prefer for battery-powered ADAS modules requiring extended idle time; verify feed-forward necessity for line-transient-critical designs. |
Compared with LM2678SD-5.0/NOPB and MPQ4312-AEC1, the TPS5420QDRQ1 uniquely combines AEC-Q100 qualification, voltage feed-forward for superior line regulation, and SOIC-8 thermal performance at 2A-making it optimal for cost-sensitive, space-constrained automotive buck applications demanding robust transient immunity.
Availability
TPS5420QDRQ1 is available at Aetrix Electronics and suitable for automotive ECU power rails, infotainment core supplies, and ADAS camera module regulation requiring stable component supply across long production lifecycles and stringent environmental compliance.
Supply support for TPS5420QDRQ1 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 power management technologies, with decades of automotive IC development and AEC-Q100 validation expertise.
The TPS5420QDRQ1 belongs to TI's SWIFT™ family of high-current DC/DC converters, designed specifically for automotive power systems requiring high efficiency, small solution size, and robust operation under harsh electrical and thermal conditions.
FAQ
What is the maximum input voltage rating for the TPS5420QDRQ1?
The TPS5420QDRQ1 has an absolute maximum input voltage rating of 40V, but its recommended operating input voltage range is 5.5V to 36V. Operation at 36V aligns with automotive load-dump specifications per ISO 7637-2, and the device includes overvoltage protection to safeguard downstream circuitry during transient events. Exceeding 36V continuously may trigger thermal shutdown or reduce reliability.
Does the TPS5420QDRQ1 require external compensation components?
No, the TPS5420QDRQ1 features fully internal type-3 compensation optimized for voltage-mode control with feed-forward. This eliminates the need for external resistors, capacitors, or op-amps in the feedback loop-reducing BOM count, PCB area, and design iteration time. The internal network ensures ≥60° phase margin across all valid operating conditions without user tuning.
How does the voltage feed-forward function improve performance in the TPS5420QDRQ1?
The TPS5420QDRQ1's voltage feed-forward adjusts the PWM ramp amplitude inversely with input voltage, maintaining constant power-stage gain across its 5.5V–36V input range. This results in significantly improved line regulation (<0.01%/V) and faster recovery from input transients-critical for automotive systems experiencing battery voltage sag during cranking or surge during alternator load dump.
Can the TPS5420QDRQ1 be used in a synchronous rectifier configuration?
The TPS5420QDRQ1 integrates only a high-side N-channel MOSFET and requires an external catch diode (e.g., B340A) or synchronous rectifier FET driven by a separate gate controller. It does not support true synchronous operation natively. For fully synchronous designs, consider TI's TPS543x-Q1 series or MPQ4312-AEC1, which integrate both high- and low-side switches.
What is the thermal shutdown behavior of the TPS5420QDRQ1?
The TPS5420QDRQ1 activates thermal shutdown at 135°C junction temperature (typical), grounding the internal reference and disabling the high-side MOSFET. Once junction temperature falls 14°C below the trip point (i.e., to ~121°C), the device automatically restarts using the internal slow-start circuit. This hysteresis prevents thermal oscillation and ensures safe recovery without external intervention.
TPS5420QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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):
- 36V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 31V
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS5420QDRQ1 FAQ
1.How can I place an order for TPS5420QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5420QDRQ1 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 TPS5420QDRQ1 reliable?
The price and inventory of TPS5420QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5420QDRQ1 is usually 5 days.
3.What payment methods are accepted for TPS5420QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5420QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5420QDRQ1?
TPS5420QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5420QDRQ1 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 TPS5420QDRQ1?
For technical support, including TPS5420QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5420QDRQ1 requirements.
6.How does Aetrix verify that TPS5420QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS5420QDRQ1 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 TPS5420QDRQ1 meets industry standards.
7.What is the process for return or replacement of TPS5420QDRQ1?
All TPS5420QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS5420QDRQ1, 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 TPS5420QDRQ1 part is unused and in its original packaging.
Return procedure for TPS5420QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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