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Texas Instruments TPS65400QRGZTQ1
- Part No.:
- TPS65400QRGZTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TPS65400QRGZTQ1.pdf
- Description:
- IC REG BCK ADJ 4A/2A QUAD 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:539
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Product details
Overview
TPS65400QRGZTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 4.5–18 V input, four-channel PMBus/I²C-configurable power management unit (PMU) integrating two 4-A and two 2-A synchronous buck regulators with integrated FETs, programmable current limits, and precision soft-start. It powers FPGA, processor, and ASIC core rails in space-constrained automotive infotainment and ADAS ECUs.
For engineers reviewing the TPS65400QRGZTQ1 datasheet, TPS65400QRGZTQ1 pinout, TPS65400QRGZTQ1 application, or TPS65400QRGZTQ1 equivalent, key selection considerations include per-channel current limit configurability (0.5–6 A), independent 275 kHz–2.2 MHz PWM frequency tuning, phase alignment for ripple reduction, pre-bias startup support, and EEPROM-stored sequencing with PGOOD dependency or fixed-time delay modes.
Technical Context
The TPS65400QRGZTQ1 implements a fully integrated PMU architecture with four independent buck controllers-SW1/SW2 (4 A max, 66 mΩ/42 mΩ HS/LS RDS(on)) and SW3/SW4 (2 A max, 120 mΩ/90 mΩ HS/LS RDS(on))-each supporting adjustable current limit, soft-start timing via external capacitor, and feedback accuracy of ±1% over –40°C to 125°C. All regulators share a common 4.5–18 V input rail and support output voltages from 0.6 V to 90% of VIN.
Its digital control layer features a PMBus/I²C interface with EEPROM storage for voltage setpoints, sequencing order, switching frequencies, and fault thresholds; runtime reconfiguration includes VREF adjustment in 10-mV steps (0.6–1.87 V), enable/disable per channel, and real-time status monitoring (PGOOD, OCP, UVP/OVP, thermal shutdown at 160°C). Clock synchronization supports master/slave operation across multiple PMUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports direct connection to 5 V or 12 V intermediate distribution buses in automotive and industrial systems. |
| Buck Output Current | SW1 & SW2: 4 A max; SW3 & SW4: 2 A max - enables high-current core rail generation without external MOSFETs or discrete controllers. |
| Switching Frequency | 275 kHz to 2.2 MHz - adjustable per channel via RCLOCK_SYNC resistor or I²C to optimize efficiency vs. size trade-offs. |
| Feedback Accuracy | ±1% at VFB = 1 V - ensures tight output regulation under load transients and temperature variation for sensitive digital loads. |
| Current Limit Range | SW1/SW2: 2–6 A; SW3/SW4: 0.5–3 A - allows inductor sizing optimization for specific application current demands. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects device during sustained overload or poor PCB thermal design while enabling high ambient operation. |
| Package | VQFN-48 (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad - provides low thermal resistance (RθJB = 6.3°C/W) for conduction cooling in sealed enclosures. |
Pinout & Package
TPS65400QRGZTQ1 uses a thermally enhanced 48-pin VQFN package (7.0 mm × 7.0 mm, 0.5 mm pitch) with an exposed PGND thermal pad requiring solder connection to PCB for optimal heat dissipation and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENSW1/ENSEQ (Pin 48) | Enable input for SW1 / Sequencing master control | Active-high enable with 2 µA internal pullup; also serves as primary sequencing trigger when configured via EEPROM. |
| SS1/PG1 (Pin 45) | Soft-start timing / PGOOD1 output | Capacitor-connected node sets startup ramp time; reconfigurable via I²C to output PGOOD1 status instead. |
| VFB1 (Pin 47) | Feedback input for SW1 | Connects to resistor divider from SW1 output to set regulated voltage; referenced to internal 0.6–1.87 V programmable VREF. |
| COMP1 (Pin 46) | Compensation network connection | External RC network stabilizes control loop; pulling COMP2 high to VDDD enables SW1 to control both SW1 and SW2. |
| CB1 (Pin 1) | Bootstrap capacitor connection for SW1 high-side gate drive | Requires 0.1 µF ceramic capacitor between CB1 and SW1 to sustain gate voltage during high-side FET conduction. |
| PGND (Thermal Pad) | Power ground return path | Must be soldered to large PCB copper area; serves as common return for all buck converters and thermal conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel current limit programming | Enables precise inductor selection and cost/size optimization-e.g., configure SW1 for 3 A instead of 4 A in low-power mode. |
| Independent PWM phase alignment | Reduces input ripple by up to 50% and cuts bulk capacitance requirements when interleaving SW1/SW2 or SW3/SW4. |
| PMBus/I²C with EEPROM storage | Retains full configuration (voltage, sequence, frequency, faults) across power cycles-no external microcontroller needed for setup. |
| Pre-bias startup algorithm | Prevents output voltage dip during startup into pre-charged loads (e.g., FPGA banks with decoupling caps already charged). |
| Adjustable soft-start timing | Capacitor-based SSx pins allow fine-grained control of ramp rate (e.g., 1–100 ms) to meet system-level inrush current limits. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera ECU |
|---|---|
|
Use Scenario: Powering multi-core SoC, DDR memory, display interface, and audio codec in a compact dashboard head unit operating at 105°C ambient. IC Role / Device Role / Timing Role: Primary PMU delivering four independent, sequenced rails (1.1 V SoC core, 1.2 V DDR, 1.8 V I/O, 3.3 V peripherals) with synchronized startup and fault reporting. Use Value: Eliminates need for five discrete DC/DCs and sequencing IC; achieves >95% peak efficiency at 12 V input while meeting AEC-Q100 Grade 1 reliability. |
Use Scenario: Supplying image sensor, ISP processor, and Ethernet PHY in a rear-view camera module mounted near exhaust components. IC Role / Device Role / Timing Role: Single-chip power solution providing 1.0 V sensor analog, 1.2 V ISP core, 1.8 V MIPI interface, and 3.3 V PHY rails with thermal derating and watchdog-enabled fault recovery. Use Value: Reduces BOM count by 70% vs. discrete buck + supervisor; thermal pad and 125°C junction rating ensure stable operation without forced air cooling. |
| Industrial PLC CPU Module | 5G Small Cell Baseband Unit |
|
Use Scenario: Generating isolated core, memory, and I/O rails in a DIN-rail-mounted programmable logic controller with wide input range (9–36 V DC). IC Role / Device Role / Timing Role: Intermediate bus converter accepting 12 V from front-end DC/DC and distributing tightly regulated, sequenced outputs to ARM Cortex-M7 and SRAM banks. Use Value: Input UVLO (4.48 V rising) and OVP (111% VREF) protect against brownout and surge events; I²C telemetry enables predictive maintenance logging. |
Use Scenario: Powering FPGA-based baseband processing, RF front-end bias, and fronthaul Ethernet in a fanless picocell deployed on streetlight poles. IC Role / Device Role / Timing Role: High-efficiency PMU delivering 0.85 V FPGA core, 1.2 V memory, 2.5 V RF bias, and 3.3 V PHY with dynamic voltage scaling via PMBus commands. Use Value: 2.2 MHz max switching frequency allows use of 2.2 µH inductors, reducing solution footprint by 40% vs. 500 kHz designs; clock sync enables multi-PMU coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65917B1RSLR | Four buck channels (3 A/3 A/2 A/2 A), no PMBus; SPI-only interface; fixed 2.2 MHz Fsw; no current limit programming. | Lacks runtime voltage/sequence reconfiguration and EEPROM persistence; suited for static, cost-sensitive designs. | Choose when I²C/PMBus telemetry and field-upgradable sequencing are unnecessary and lower BOM cost is prioritized. |
| MAX20029ATI+T | Three buck channels (4 A/3 A/3 A), I²C interface, AEC-Q100 Grade 1, but no EEPROM; requires external sequencer for multi-rail coordination. | No integrated sequencing logic or fault logging; relies on host MCU for coordination and recovery actions. | Choose when system already includes a robust MCU-based power manager and only basic I²C-controlled regulation is required. |
Compared with TPS65400QRGZTQ1, TPS65917B1RSLR offers lower integration depth (no EEPROM, no current limit tuning) but higher channel current symmetry, while MAX20029ATI+T trades sequencing autonomy for smaller footprint and simpler firmware dependencies-neither matches the TPS65400QRGZTQ1's combination of autonomous EEPROM-based sequencing, per-channel programmability, and PMBus telemetry.
Availability
TPS65400QRGZTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for TPS65400QRGZTQ1 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 automotive-grade power management innovation and rigorous AEC-Q100 qualification infrastructure.
The TPS65400QRGZTQ1 belongs to TI's automotive-qualified PMU product line, designed specifically for high-density, high-temperature electronic control units where single-chip integration, digital configurability, and functional safety readiness are critical.
FAQ
What is the maximum supported switching frequency for each buck regulator in the TPS65400QRGZTQ1?
The TPS65400QRGZTQ1 supports independent PWM frequency adjustment per channel from 275 kHz to 2.2 MHz. This range is set either by an external resistor on the RCLOCK_SYNC pin or dynamically via PMBus command. At 2.2 MHz, the minimum off-time constraint (150 ns) ensures stable operation even at high duty cycles, enabling compact magnetics and reduced output capacitance in space-constrained automotive modules.
How does the TPS65400QRGZTQ1 handle power sequencing across its four buck outputs?
The TPS65400QRGZTQ1 supports dual sequencing modes: hardware-based using individual ENSWx pins with external timing elements, or firmware-defined via PMBus registers stored in onboard EEPROM. Sequencing can be configured with fixed delays (0–255 ms resolution) or PGOOD dependency chains. The TPS65400QRGZTQ1 executes the full sequence autonomously after CE assertion-no host processor involvement is required once programmed.
Can the TPS65400QRGZTQ1 operate with a pre-biased output voltage during startup?
Yes, the TPS65400QRGZTQ1 implements a dedicated pre-bias startup algorithm that prevents reverse current flow and output voltage dip when powering into a pre-charged rail. This feature is active by default and requires no configuration-it monitors VFB during startup and adjusts soft-start behavior to maintain monotonic rise, making it ideal for FPGA and ASIC applications with large output capacitance.
What thermal management provisions does the TPS65400QRGZTQ1 include for automotive under-hood environments?
The TPS65400QRGZTQ1 integrates thermal shutdown at 160°C with 20°C hysteresis, junction-to-board thermal resistance of 6.3°C/W, and a soldered thermal pad for direct PCB conduction cooling. Its AEC-Q100 Grade 1 qualification (-40°C to 125°C ambient) and 150°C max junction rating enable reliable operation in sealed enclosures near heat sources-no heatsink or airflow is required when layout follows TI's recommended 4-layer board guidelines.
Is the TPS65400QRGZTQ1 pin-compatible with any other TI PMU devices?
No, the TPS65400QRGZTQ1 has a unique 48-pin VQFN pinout optimized for its four-buck + PMBus + sequencing architecture. While functionally similar to the TPS65917 series, it is not pin-compatible due to differences in control pin allocation (e.g., dedicated SSx/PGx dual-function pins, RCLOCK_SYNC, I2CALERT) and internal regulator routing. Migration requires PCB redesign and firmware adaptation.
TPS65400QRGZTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 16.2V
- Current - Output:
- 4A, 2A
- Frequency - Switching:
- 275kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-VQFN (7x7)
TPS65400QRGZTQ1 FAQ
1.How can I place an order for TPS65400QRGZTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65400QRGZTQ1 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 TPS65400QRGZTQ1 reliable?
The price and inventory of TPS65400QRGZTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65400QRGZTQ1 is usually 5 days.
3.What payment methods are accepted for TPS65400QRGZTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65400QRGZTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65400QRGZTQ1?
TPS65400QRGZTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65400QRGZTQ1 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 TPS65400QRGZTQ1?
For technical support, including TPS65400QRGZTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65400QRGZTQ1 requirements.
6.How does Aetrix verify that TPS65400QRGZTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65400QRGZTQ1 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 TPS65400QRGZTQ1 meets industry standards.
7.What is the process for return or replacement of TPS65400QRGZTQ1?
All TPS65400QRGZTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65400QRGZTQ1, 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 TPS65400QRGZTQ1 part is unused and in its original packaging.
Return procedure for TPS65400QRGZTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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