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Texas Instruments TPS51397ARJER
- Part No.:
- TPS51397ARJER
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerVFQFN
- Datasheet:
-
TPS51397ARJER.pdf
- Description:
- IC REG BUCK ADJ 10A 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
TPS51397ARJER from Texas Instruments is a monolithic 10-A synchronous buck converter with integrated 17-mΩ high-side and 5.9-mΩ low-side MOSFETs, operating from 4.5 V to 24 V input and delivering 0.6 V to 5.5 V output. It features D-CAP3™ control for fast transient response, ULQ™ operation at 110 μA quiescent current, and supports Eco-mode™/Out-of-Audio™ light-load operation in notebook and ultrabook power rails.
For engineers reviewing the TPS51397ARJER datasheet, TPS51397ARJER pinout, TPS51397ARJER application, or TPS51397ARJER equivalent, key selection considerations include its 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package, selectable 500-kHz/800-kHz switching frequency, internal 1.2-ms soft-start, ±1% feedback accuracy at 25°C, and integrated power-good and output discharge functions.
Technical Context
The TPS51397ARJER implements D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation with ultra-low-ESR ceramic or POSCAP output capacitors without external compensation. Its large-duty-cycle extension function maintains performance when VIN/VOUT < 1.6, improving load transient response under low-input conditions.
ULQ™ operation reduces no-load supply current to 110 μA, while MODE pin configuration selects between Eco-mode™ (maximizing light-load efficiency) and Out-of-Audio™ mode (maintaining >20 kHz switching to eliminate audible noise). Protection includes cycle-by-cycle valley-current OCP, latched OVP/UVP, non-latched UVLO/OTP, and integrated output discharge via 350-Ω internal FET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide-range industrial and portable DC inputs including 12-V and 19-V adapter rails. |
| Output Current | 10 A continuous - delivers full-rated current without external current-sense components or heatsink requirements in typical layouts. |
| Feedback Accuracy | 0.6 V ± 1% at 25°C - ensures tight output voltage regulation critical for CPU/GPU core rail stability. |
| Quiescent Current | 110 μA in ULQ™ mode - extends battery runtime during system standby in ultrabooks and tablets. |
| Switching Frequency | Selectable 500 kHz or 800 kHz - balances efficiency vs. size: lower frequency improves light-load efficiency; higher frequency reduces inductor/capacitor footprint. |
| Thermal Range | –40°C to 125°C junction - qualified for demanding embedded and mobile applications with sustained high-power operation. |
| Protection Features | Cycle-by-cycle OCP, latched OVP/UVP, non-latched UVLO/OTP - provides robust fault coverage without external supervision circuitry. |
Pinout & Package
TPS51397ARJER is housed in a thermally enhanced 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN (RJE) package with exposed thermal pad (PGND-connected) for efficient heat dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1-μF capacitor to SW for proper high-side turn-on. |
| VIN (2,3,4,5) | Main input supply | Distributes input power across four pins to reduce IR drop and improve thermal spreading for 10-A operation. |
| SW (6,19,20) | Power switch node | Connects to inductor and bootstrap capacitor; high di/dt node requiring tight layout and ground plane stitching. |
| PGND (7,8,18,Pad) | Power ground return | Low-impedance path for high-current switching loops; thermal pad must be soldered to PCB ground plane. |
| PGOOD | Open-drain status indicator | Asserts high after 1-ms delay when VOUT is within 90–110% of target; pulls low on OVP/UVP/thermal fault or during soft-start. |
| SS | Soft-start timing | Internal 1.2-ms default; external capacitor extends ramp time for inrush current limiting in multi-rail systems. |
| EN | Enable control | Active-high logic input with 1.2–1.4 V threshold; internal pull-down enables default-off behavior for safe power sequencing. |
| FB | Output voltage sense | High-impedance input referenced to AGND; connects to resistor divider for precise 0.6-V reference tracking. |
| MODE | Light-load mode select | Resistor-divider programmable to set Eco-mode™ (efficiency-optimized) or Out-of-Audio™ (noise-avoidance) operation. |
| VCC | Internal LDO output | 5.0 V ±1.5% regulated supply for gate drivers and control logic; requires ≥1-μF local ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ Control | Enables stable regulation with zero external compensation components and compatibility with both ceramic and polymer output capacitors. |
| ULQ™ Operation | Reduces no-load IQ to 110 μA, directly extending battery life in always-on system standby states. |
| Large Duty Cycle Extension | Maintains regulation down to VIN/VOUT = 1.6, improving transient response during low-input-voltage events like adapter brownouts. |
| Integrated Power-Good | Provides system-level sequencing feedback with 1-ms startup delay and fault detection for OVP/UVP/thermal events. |
| Output Discharge Function | Uses internal 350-Ω FET to safely discharge output capacitance during shutdown, preventing back-powering of downstream circuits. |
Applications
| Ultrabook Core Rail | Notebook DDR Memory Supply |
|---|---|
Use Scenario: Powers CPU/GPU core logic in fanless ultrabooks with strict thermal envelope and battery life targets. IC Role / Device Role / Timing Role: Primary 10-A synchronous buck regulator delivering dynamically scaled 0.7–1.35 V core voltage with fast load-step response. Use Value: ULQ™ mode extends standby time; D-CAP3™ eliminates compensation tuning; HotRod™ package enables compact 2-layer PCB layout. | Use Scenario: Supplies DDR4/DDR5 memory subsystems requiring tightly regulated 1.2 V or 1.1 V with low-noise operation. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with Out-of-Audio™ mode to prevent audible coil whine during memory access bursts. Use Value: 800-kHz switching + OOA mode suppresses acoustic noise; ±1% FB accuracy ensures JEDEC-compliant voltage margins. |
| Industrial PC I/O Rail | Drone Flight Controller Power |
Use Scenario: Generates stable 3.3 V or 5 V for PCIe peripherals and USB controllers in ruggedized IPCs operating across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Robust main power stage with latched OVP/UVP and non-latched UVLO/OTP for unattended operation in harsh environments. Use Value: –40°C to 125°C junction rating ensures reliability; integrated discharge prevents latch-up during hot-swap events. | Use Scenario: Powers flight controller SoC and IMU sensors in battery-powered non-military drones requiring lightweight, high-efficiency conversion. IC Role / Device Role / Timing Role: Compact 10-A buck supplying 1.8 V core and 3.3 V I/O from single-cell LiPo (3.0–4.2 V) or 2S pack (6.0–8.4 V). Use Value: Wide 4.5–24 V input accommodates variable battery configurations; large duty extension sustains regulation during low-VIN motor surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS56C230RJER | 12-A rated, pin-to-pin compatible, identical package and pinout; higher current capability but 13-mΩ/4.5-mΩ FETs. | Targeted at higher-current SoC rails where margin above 10 A is required; same Eco-mode/ULQ™ feature set. | Select TPS56C230RJER when design headroom or future-proofing for >10-A loads is needed; otherwise TPS51397ARJER offers optimal cost/performance for 10-A use cases. |
| MP2315GJ-Z | 10-A monolithic buck with 12-V max input, no ULQ™ mode (IQ = 300 μA), fixed 500-kHz frequency, no MODE pin or OOA option. | Suitable for cost-sensitive industrial applications where audio noise and ultra-low standby power are not critical. | Choose MP2315GJ-Z only for fixed-frequency, non-battery applications with ≤12-V input; TPS51397ARJER remains superior for portable, low-IQ, and noise-sensitive designs. |
Compared with TPS56C230RJER, TPS51397ARJER trades 2-A current headroom for optimized thermal performance and identical feature parity in a proven 10-A footprint; versus MP2315GJ-Z, it adds ULQ™, dual-frequency selection, and OOA mode-critical for battery life and acoustic compliance in mobile systems.
Availability
TPS51397ARJER is available at Aetrix Electronics and suitable for notebook computers, ultrabook power management, and industrial PC applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS51397ARJER 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 expertise in power management IC design and manufacturing.
The TPS51397A belongs to TI's high-density synchronous buck converter product line, engineered specifically for space-constrained, battery-sensitive computing platforms such as ultrabooks, tablets, and embedded PCs requiring ultra-low quiescent current and fast transient response.
FAQ
What is the maximum output current supported by the TPS51397ARJER?
The TPS51397ARJER supports 10 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, adequate PCB copper area, and proper thermal vias). This rating is validated with integrated 17-mΩ high-side and 5.9-mΩ low-side MOSFETs, eliminating the need for external power stages. Derating applies above 85°C ambient or with insufficient thermal design.
Does the TPS51397ARJER require external compensation components?
No, the TPS51397ARJER uses D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable operation without external compensation networks. It supports both ultra-low-ESR ceramic capacitors and polymer/POSCAP types, simplifying layout and reducing BOM count. The control loop is fully internal and factory-tuned for standard output filter configurations.
How does ULQ™ operation benefit battery-powered devices using the TPS51397ARJER?
ULQ™ (Ultra Low Quiescent) operation reduces the TPS51397ARJER's no-load supply current to just 110 μA, significantly extending battery runtime during system standby or sleep modes. This is especially valuable in ultrabooks and tablets where long idle periods dominate usage patterns, directly translating to measurable hours of added standby life without compromising active-performance capability.
Can the TPS51397ARJER operate with input voltages below 4.5 V?
No-the TPS51397ARJER has a specified minimum input voltage of 4.5 V per absolute maximum and recommended operating conditions. Attempting operation below this threshold may cause UVLO activation, erratic regulation, or failure to start. For sub-4.5-V applications, consider TI's TPS546C23 or alternative buck regulators rated for lower VIN.
What protection features are integrated into the TPS51397ARJER?
The TPS51397ARJER integrates cycle-by-cycle overcurrent protection (OCP), latched overvoltage (OVP) and undervoltage (UVP) protection, non-latched undervoltage lockout (UVLO) and overtemperature protection (OTP), plus built-in output discharge. These functions operate autonomously without external circuitry, ensuring robust fault handling in mission-critical power rails such as CPU cores and memory supplies.
TPS51397ARJER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP3™
- Package/Case:
- 20-PowerVFQFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 10A
- Frequency - Switching:
- 500kHz, 800kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN-HR (3x3)
TPS51397ARJER FAQ
1.How can I place an order for TPS51397ARJER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51397ARJER 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 TPS51397ARJER reliable?
The price and inventory of TPS51397ARJER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51397ARJER is usually 5 days.
3.What payment methods are accepted for TPS51397ARJER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51397ARJER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51397ARJER?
TPS51397ARJER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51397ARJER 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 TPS51397ARJER?
For technical support, including TPS51397ARJER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51397ARJER requirements.
6.How does Aetrix verify that TPS51397ARJER is sourced from the original manufacturer or authorized distributors?
All TPS51397ARJER 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 TPS51397ARJER meets industry standards.
7.What is the process for return or replacement of TPS51397ARJER?
All TPS51397ARJER units undergo pre-shipment inspection (PSI). If there is an issue with TPS51397ARJER, 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 TPS51397ARJER part is unused and in its original packaging.
Return procedure for TPS51397ARJER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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