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Texas Instruments TPS51396ARJET
- Part No.:
- TPS51396ARJET
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerVFQFN
- Datasheet:
-
TPS51396ARJET.pdf
- Description:
- IC REG BUCK ADJ 8A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:969
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Product details
Overview
TPS51396ARJET from Texas Instruments is an 8-A synchronous step-down voltage regulator with integrated high- and low-side MOSFETs, operating from 4.5 V to 24 V input and delivering 0.6 V to 7 V output. It features D-CAP3™ control for fast transient response, ULQ™ mode for ultra-low quiescent current (90 µA), and selectable Eco-Mode™ or Out-of-Audio (OOA) light-load operation - ideal for notebook power rails requiring extended battery life and stable POL regulation.
For engineers reviewing the TPS51396ARJET datasheet, TPS51396ARJET pinout, TPS51396ARJET application, or TPS51396ARJET equivalent, key selection criteria include its 19.5-mΩ/9.5-mΩ RDS(on) FETs, 600/800/1-MHz switching frequency selection via MODE pin, 1% feedback accuracy at 25°C, built-in power good indicator, and 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package with thermal resistance RθJA = 44.9°C/W.
Technical Context
The TPS51396ARJET employs D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable operation with ultra-low-ESR ceramic or polymer capacitors without external compensation. Its ULQ™ mode reduces supply current to 90 µA under no load while maintaining large-duty-cycle capability for high VIN/VOUT ratios.
Light-load behavior is configurable via the MODE pin: Eco-Mode™ maximizes efficiency by reducing switching frequency proportionally to load, while OOA mode sustains >25 kHz switching even at zero load to eliminate audible noise. Protection includes cycle-by-cycle valley-current OCP, latched OVP/UVP, and non-latched OTP/UVLO - all implemented with internal sensing and logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide-input industrial and battery-powered systems including 12-V and 19-V nominal rails. |
| Output Current | 8 A continuous - delivers full rated current without derating at TJ ≤ 125°C in typical PCB layouts. |
| Feedback Accuracy | ±1% at 25°C (594–606 mV) - ensures tight output regulation critical for core voltage supplies in processors and FPGAs. |
| RDS(on) (HS/LS) | 19.5 mΩ / 9.5 mΩ - minimizes conduction loss and enables high-efficiency operation across load range. |
| Switching Frequency | Selectable 600/800/1 MHz - allows optimization of size (higher fSW) vs. efficiency (lower fSW) per design requirements. |
| Quiescent Current | 90 µA (no load, VEN = 3.3 V) - extends battery runtime during system standby in portable applications. |
| Thermal Resistance | RθJA = 44.9°C/W - enables 8-A operation with moderate copper area and airflow in 3×3-mm HotRod™ VQFN. |
Pinout & Package
The TPS51396ARJET is housed in a 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN (RJE) package with exposed thermal pad. This thermally enhanced layout places power pins (VIN, SW, PGND) and ground planes adjacent to maximize heat dissipation and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives high-side gate; requires 0.1-µF capacitor between BST and SW for proper high-side FET turn-on. |
| VIN (2,3,4,5) | Main input supply | Connects to bulk input capacitor; multiple pins reduce IR drop and improve current sharing. |
| SW (6,19,20) | Switch node | High-current path to output inductor; multiple pins lower loop inductance and EMI. |
| PGND (7,8,18,Pad) | Power ground | Direct connection to PCB ground plane; thermal pad must be soldered for thermal performance. |
| FB | Feedback input | Senses output voltage via resistor divider; 600-mV reference enables precise VOUT setting. |
| EN | Enable control | Active-high digital input; internal pull-down disables converter if left floating. |
| MODE | Light-load mode select | Resistor-divider programmable for Eco-Mode™ or OOA mode and fSW selection (600/800/1 MHz). |
| SS | Soft-start timing | External capacitor sets soft-start time beyond internal 1.3-ms default; prevents inrush current. |
| PGOOD | Power-good indicator | Open-drain output asserts low during fault, soft-start, or VOUT deviation > ±10%; requires 100-kΩ pull-up. |
| VCC | Internal LDO output | 5.0-V regulated output (4.85–5.15 V) powers internal circuitry; bypass with 1-µF capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control architecture | Enables stable regulation with zero external compensation components and compatibility with MLCC, POSCAP, and SP-CAP output capacitors. |
| ULQ™ ultra-low quiescent current | 90 µA operating current extends battery life in always-on or standby modes without sacrificing startup speed or regulation. |
| Selectably optimized light-load operation | MODE pin configures Eco-Mode™ (efficiency-optimized) or OOA mode (audible-noise-free >25 kHz) - no firmware or external logic required. |
| Integrated protection suite | Cycle-by-cycle OCP, latched OVP/UVP, non-latched OTP/UVLO, and built-in output discharge ensure robust field reliability in unattended systems. |
| Large-duty-cycle support | TON extension function maintains regulation down to VOUT/VIN ≈ 0.025 (e.g., 0.6 V from 24 V), critical for high-ratio POL conversion. |
Applications
| Notebook Core Power | Industrial Point-of-Load |
|---|---|
Use Scenario: Regulating CPU/GPU core voltage (e.g., 1.0 V or 1.2 V) from 12-V or 19-V battery or adapter input in ultrabooks and 2-in-1 devices. IC Role / Device Role / Timing Role: Primary synchronous buck controller providing tightly regulated, low-noise DC output with fast transient response to dynamic processor load steps. Use Value: ULQ™ mode extends battery life during sleep; Eco-Mode™ maintains >90% efficiency at 10-mA load; D-CAP3™ eliminates need for external compensation. | Use Scenario: Generating 3.3-V or 5-V rails for PLC I/O modules, motor drive logic, or sensor interfaces in factory automation equipment. IC Role / Device Role / Timing Role: High-reliability, wide-input POL regulator handling 4.5–24-V industrial bus variations and supporting long-term operation at 8-A peak. Use Value: Integrated 19.5-mΩ/9.5-mΩ FETs reduce BOM count and thermal stress; latched OVP/UVP prevents downstream damage during overvoltage events. |
| Telecom DC-DC Conversion | Distributed Power Systems |
Use Scenario: Converting 12-V or 48-V intermediate bus to 1.8-V or 3.3-V for FPGA, ASIC, or SerDes power in networking switches and base stations. IC Role / Device Role / Timing Role: High-efficiency, low-EMI buck stage with OOA mode eliminating audible coil whine in densely packed telecom chassis. Use Value: 1-MHz switching option enables compact 1-µH inductors; PGOOD signal synchronizes with system power sequencing controllers. | Use Scenario: Local regulation for remote sensors, edge AI accelerators, or IoT gateways powered from centralized 24-V DC distribution buses. IC Role / Device Role / Timing Role: Standalone, self-contained buck converter with integrated discharge, soft-start, and protection - simplifying distributed architecture design. Use Value: Built-in output discharge ensures safe power-down sequencing; thermal shutdown (150°C) protects against ambient overheating in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54821RHLR | 4.5–20-V input, 8-A, 600-kHz fixed fSW, no ULQ™ or OOA mode; uses current-mode control with external compensation. | Lacks ULQ™ and OOA capabilities; less suitable for battery standby or noise-sensitive audio environments. | Choose when design prioritizes proven current-mode stability over ultra-low IQ or audible-noise suppression. |
| MP2384CGG-Z | 4.5–28-V input, 8-A, 500-kHz fixed fSW, no MODE-selectable light-load modes; lower RDS(on) (14/7 mΩ) but no integrated discharge or PGOOD. | Higher efficiency at full load but lacks power-good signaling and automatic output discharge for safety-critical shutdown. | Prefer for cost-sensitive, high-efficiency fixed-frequency designs where sequencing and discharge are handled externally. |
Compared with TPS51396ARJET, TPS54821RHLR offers simpler current-mode tuning but sacrifices battery-life extensions and noise control, while MP2384CGG-Z improves conduction loss yet omits essential system-level features like PGOOD and discharge - making TPS51396ARJET optimal for integrated, low-maintenance POL designs.
Availability
TPS51396ARJET is available at Aetrix Electronics and suitable for notebook power management, industrial point-of-load regulation, and telecom DC-DC conversion requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for TPS51396ARJET 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 ICs for computing, industrial, and automotive markets.
The TPS51396A product line delivers high-efficiency, wide-input synchronous buck regulators optimized for portable and space-constrained applications where battery life, thermal performance, and system-level integration are critical design priorities.
FAQ
What is the maximum input voltage rating for the TPS51396ARJET?
The TPS51396ARJET has an absolute maximum input voltage rating of 26 V on the VIN pin, but its recommended operating input voltage range is strictly 4.5 V to 24 V per the datasheet. Exceeding 24 V DC (including tolerance) risks violating recommended conditions and may impact long-term reliability or trigger UVLO shutdown at the lower threshold of 3.6–3.8 V.
How does the MODE pin configure switching frequency and light-load behavior in the TPS51396ARJET?
The MODE pin on the TPS51396ARJET accepts a resistor divider from VCC to AGND to select both switching frequency (600 kHz, 800 kHz, or 1 MHz) and light-load operation mode (Eco-Mode™ or OOA). Specific voltage thresholds defined in Table 7-1 determine the configuration - for example, connecting MODE directly to AGND selects 600 kHz Eco-Mode™, while pulling it to ~1.2 V enables OOA mode at the same frequency.
Does the TPS51396ARJET support external soft-start adjustment, and how is it implemented?
Yes, the TPS51396ARJET supports external soft-start adjustment via the SS pin. When an external capacitor (CSS) is connected between SS and AGND, the internal 5-µA soft-start charge current ramps the SS voltage, extending soft-start time beyond the default 1.3 ms. The soft-start duration follows TSS = (0.6 V × CSS) / 5 µA, allowing precise control of inrush current for sensitive downstream loads.
What protection features are latched versus non-latched in the TPS51396ARJET?
In the TPS51396ARJET, overvoltage (OVP) and undervoltage (UVP) protections are latched - meaning the device remains disabled until EN is toggled or input power is cycled. In contrast, overtemperature (OTP) and undervoltage lockout (UVLO) are non-latched: recovery occurs automatically once the fault condition clears (e.g., die temperature drops below 130°C hysteresis or VIN rises above 4.2 V).
Can the TPS51396ARJET operate with ceramic output capacitors, and what is the minimum ESR requirement?
Yes, the TPS51396ARJET is explicitly designed to operate with ultra-low-ESR ceramic capacitors due to its D-CAP3™ control architecture and internal ripple injection circuit. No minimum ESR is required - the regulator remains stable even with near-zero-ESR MLCCs, eliminating the need for added series resistance or hybrid capacitor solutions typically required by voltage-mode controllers.
TPS51396ARJET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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):
- 7V
- Current - Output:
- 8A
- Frequency - Switching:
- 600kHz, 800kHz, 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN-HR (3x3)
TPS51396ARJET FAQ
1.How can I place an order for TPS51396ARJET through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51396ARJET 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 TPS51396ARJET reliable?
The price and inventory of TPS51396ARJET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51396ARJET is usually 5 days.
3.What payment methods are accepted for TPS51396ARJET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51396ARJET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51396ARJET?
TPS51396ARJET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51396ARJET 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 TPS51396ARJET?
For technical support, including TPS51396ARJET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51396ARJET requirements.
6.How does Aetrix verify that TPS51396ARJET is sourced from the original manufacturer or authorized distributors?
All TPS51396ARJET 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 TPS51396ARJET meets industry standards.
7.What is the process for return or replacement of TPS51396ARJET?
All TPS51396ARJET units undergo pre-shipment inspection (PSI). If there is an issue with TPS51396ARJET, 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 TPS51396ARJET part is unused and in its original packaging.
Return procedure for TPS51396ARJET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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