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Texas Instruments TPS5401DGQR
- Part No.:
- TPS5401DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS5401DGQR.pdf
- Description:
- IC REG BUCK ADJ 500MA 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,029
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Product details
Overview
TPS5401 from Texas Instruments is a 42-V input, 0.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, current-mode control, and Eco-mode™ pulse-skipping for light-load efficiency. It delivers regulated output down to 0.8 V with ±3.5% reference accuracy and supports industrial power rails in 12-V/24-V systems.
For engineers reviewing the TPS5401 datasheet, TPS5401 pinout, TPS5401 application, or TPS5401 equivalent, key selection considerations include its 100–2500 kHz adjustable switching frequency, 116-μA no-load quiescent current, open-drain PWRGD monitoring, RT/CLK synchronization capability, and MSOP-10 PowerPAD™ thermal package for high-power-density designs.
Technical Context
The TPS5401 implements constant-frequency peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty-cycle range. Its transconductance error amplifier (97 μA/V nominal, 26 μA/V during slow-start) interfaces with external RC compensation on the COMP pin for stable loop response.
Bootstrap operation enables high-duty-cycle dropout performance: BOOT-to-PH UVLO (2.1 V threshold) allows 100% duty cycle until boot capacitor recharge is required, while the integrated boot diode eliminates external component count. The RT/CLK pin supports both resistor-set frequency tuning and PLL-based external clock synchronization with 40-ns minimum pulse width tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports wide industrial input rails including 12 V, 24 V, and 36 V battery/supply systems. |
| Output Current | 0.5 A continuous - sufficient for low-power microcontrollers, sensors, and interface ICs without external heatsinking. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock; enables optimization of inductor size vs. efficiency. |
| Quiescent Current | 116 μA at no load - enables long battery life in always-on monitoring applications. |
| Reference Voltage | 0.8 V ±3.5% - sets minimum output voltage; used with external resistor divider for precise VOUT programming. |
| Power-Good Threshold | 94% to 107% of VREF - open-drain PWRGD asserts only when output is within regulation window. |
| Shutdown Current | 1.3 μA - ultra-low leakage enables deep sleep mode in energy-sensitive systems. |
| High-Side RDS(on) | 200 mΩ at 12 V VIN - reduces conduction loss and thermal rise in compact layouts. |
Pinout & Package
TPS5401 is housed in a thermally enhanced 10-pin MSOP PowerPAD™ package (3.00 mm × 3.00 mm), with exposed thermal pad electrically connected to GND for improved heat dissipation in high-current or high-ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to PH via 0.1-μF ceramic capacitor; supplies gate drive for high-side MOSFET; monitored by internal 2.1-V UVLO. |
| VIN | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side switch; requires local CIN decoupling. |
| GND | Power and signal reference | Common return path; must be tied to thermal pad for thermal and electrical integrity. |
| PH | Power switch source node | Drives external inductor; connects internally to high-side MOSFET source; forms switching node with BOOT. |
| VSENSE | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) against 0.8-V reference. |
| COMP | Error amplifier output | Connects to external RC compensation network; sets loop stability and transient response. |
| EN | Enable / UVLO control | Pull below 1.2 V to disable; internal pullup enables floating operation; UVLO threshold adjustable with resistors. |
| RT/CLK | Frequency setting / sync input | Resistor-to-ground sets fSW (100–2500 kHz); pulled above 2.2 V to enter PLL sync mode with external clock. |
| SS/TR | Slow-start / tracking control | Capacitor sets soft-start time; voltage override enables sequencing with other regulators or reference tracking. |
| PWRGD | Power-good status | Open-drain output; pulls low if VSENSE falls below 94% or exceeds 107% of nominal VREF. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse-skipping | Reduces no-load quiescent current to 116 μA while maintaining regulation-critical for battery-powered metering. |
| Integrated boot diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity in space-constrained designs. |
| Adjustable UVLO with hysteresis | EN pin allows user-defined input undervoltage lockout using two resistors-enables custom brown-out recovery behavior. |
| Overvoltage fault protection | PWRGD asserts low and disables high-side switch when VSENSE exceeds 109% VREF-prevents downstream overvoltage damage. |
| Thermal shutdown & frequency foldback | Shuts down at 182°C; reduces fSW during overload to limit inductor current and improve fault recovery margin. |
| MSOP-10 PowerPAD™ package | 3×3 mm footprint with exposed thermal pad achieves 65°C/W junction-to-ambient thermal resistance-supports 0.5-A load without forced air. |
Applications
| Smart Utility Meters | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Powering MCU, RF transceiver, and metrology ADC in battery-backed or line-powered e-meters operating in harsh temperature environments. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V buck regulator delivering clean, regulated power with PWRGD signaling for system health monitoring. Use Value: 116-μA quiescent current extends battery life during standby; 42-V input withstands surges on 24-V industrial lines; thermal robustness ensures reliability at 85°C ambient. |
Use Scenario: Generating isolated or non-isolated auxiliary rails for digital I/O, analog sensing, and communication interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load converter supporting multiple voltage domains with sequencing via SS/TR pin. Use Value: Adjustable UVLO prevents erratic startup during brownouts; RT/CLK synchronization enables noise-free operation in clock-sensitive CAN/RS-485 subsystems. |
| Automotive Body Control Units | Point-of-Load for Industrial Sensors |
|
Use Scenario: Supplying 5-V rail to LIN transceivers, door module MCUs, and LED drivers in 12-V vehicle architectures with load-dump immunity requirements. IC Role / Device Role / Timing Role: Input-stage buck converter handling up to 42-V transients while providing stable output with fast transient response. Use Value: 42-V absolute max rating and built-in overvoltage protection tolerate ISO 7637-2 pulse 5a/b; MSOP PowerPAD™ aids thermal management in sealed enclosures. |
Use Scenario: Powering precision analog front-ends (e.g., strain gauge amplifiers, RTD interfaces) requiring low-noise, tightly regulated 3.3-V supply in factory automation equipment. IC Role / Device Role / Timing Role: Low-ripple, current-mode buck regulator with external compensation for optimized PSRR and bandwidth. Use Value: 0.8-V ±3.5% reference and high-accuracy feedback enable <1% output tolerance; COMP pin access allows fine-tuning for sensor-grade stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006XDDAR | 40-V input, 0.6-A, 2.1-MHz fixed-frequency; higher current rating but no Eco-mode or PWRGD output. | Lacks power-good signaling and adjustable UVLO; better suited for higher-current, lower-quiescent needs without system monitoring. | Select when >0.5-A output and fixed 2.1-MHz operation are prioritized over light-load efficiency and fault reporting. |
| TPS54202HDDCR | 42-V input, 2-A, 2.2-MHz; includes integrated soft-start, spread-spectrum, and enhanced EMI performance. | Higher current and advanced EMI features; larger package (SOT-563) and higher cost; no RT/CLK sync capability. | Choose for 2-A loads where EMI compliance is critical and board space permits larger footprint; not drop-in compatible. |
Compared with LMR14006XDDAR and TPS54202HDDCR, the TPS5401 uniquely balances ultra-low quiescent current (116 μA), PWRGD monitoring, and RT/CLK synchronization in a compact MSOP-10 PowerPAD™-making it optimal for space- and power-constrained industrial metering and control nodes.
Availability
TPS5401 is available at Aetrix Electronics and suitable for smart utility meters, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS5401 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 expertise in high-reliability power conversion solutions.
The TPS5401 belongs to TI's SWIFT™ family of integrated DC/DC converters, designed specifically for industrial, metering, and automotive applications demanding wide-input-voltage operation, low quiescent current, and robust fault protection.
FAQ
What is the minimum input voltage required for TPS5401 to start switching?
The TPS5401 has an internal undervoltage lockout threshold of 2.5 V, meaning it begins switching when VIN rises above this level. However, the actual start voltage depends on load and output configuration-for example, with a 5-V output, typical start voltage is ~5.5 V at full load due to dropout and boot capacitor recharge dynamics. The EN pin can be used with external resistors to raise this threshold for custom brown-out behavior.
Can TPS5401 operate in 100% duty cycle mode, and under what conditions?
Yes, the TPS5401 supports 100% duty cycle operation as long as the BOOT-to-PH voltage remains above 2.1 V. This occurs during dropout conditions-e.g., when VIN approaches VOUT-allowing continuous conduction to maintain regulation. If BOOT voltage drops below 2.1 V, the high-side MOSFET turns off to permit boot capacitor recharge via the internal diode and PH node.
How does the TPS5401 achieve low quiescent current, and what is its impact on light-load efficiency?
The TPS5401 uses Eco-mode™ pulse-skipping to reduce switching activity at light loads, lowering operating quiescent current to 116 μA. This directly improves light-load efficiency-e.g., achieving >85% efficiency at 10-mA load with 12-V input and 5-V output-making it ideal for always-on industrial sensors and metering devices.
What is the function of the SS/TR pin on the TPS5401, and how is it used in practice?
The SS/TR pin controls soft-start timing and enables power-supply sequencing or tracking. Connecting a capacitor sets the output voltage ramp time; applying an external voltage (e.g., from another regulator's output) allows the TPS5401 to track that rail. During faults, the pin is actively discharged to ensure repeatable restart behavior-critical for reliable multi-rail systems.
Does the TPS5401 require an external bootstrap diode, and why or why not?
No, the TPS5401 integrates a bootstrap diode, eliminating the need for an external component. This simplifies design, reduces BOM count, and improves reliability-especially in high-vibration or high-temperature environments where discrete diodes may fail. Only a 0.1-μF ceramic capacitor between BOOT and PH is required for proper gate-drive voltage generation.
TPS5401DGQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, Eco-Mode™
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm 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):
- 3.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 39V
- Current - Output:
- 500mA
- Frequency - Switching:
- 100kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS5401DGQR FAQ
1.How can I place an order for TPS5401DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5401DGQR 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 TPS5401DGQR reliable?
The price and inventory of TPS5401DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5401DGQR is usually 5 days.
3.What payment methods are accepted for TPS5401DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5401DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5401DGQR?
TPS5401DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5401DGQR 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 TPS5401DGQR?
For technical support, including TPS5401DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5401DGQR requirements.
6.How does Aetrix verify that TPS5401DGQR is sourced from the original manufacturer or authorized distributors?
All TPS5401DGQR 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 TPS5401DGQR meets industry standards.
7.What is the process for return or replacement of TPS5401DGQR?
All TPS5401DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS5401DGQR, 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 TPS5401DGQR part is unused and in its original packaging.
Return procedure for TPS5401DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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