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Texas Instruments TPS65283RGET
- Part No.:
- TPS65283RGET
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS65283RGET.pdf
- Description:
- IC REG BUCK ADJ DL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:458
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Product details
Overview
TPS65283RGET from Texas Instruments is a dual synchronous buck converter with integrated power distribution switch, delivering up to 3.5 A on Buck1 and 2.5 A on Buck2 across 4.5–18 V input, featuring 0.6 V ±1% feedback reference, 200 kHz–2 MHz adjustable switching frequency, and 60 mΩ N-channel power switch for USB port power management in set-top boxes and infotainment systems.
For engineers reviewing the TPS65283RGET datasheet, TPS65283RGET pinout, TPS65283RGET application, or TPS65283RGET equivalent, this device supports precise current-limited power delivery, phase-shifted dual-buck operation to reduce input ripple, thermal shutdown at 160°C, hiccup-mode overcurrent protection, and PGOOD monitoring for both outputs - critical for robust embedded power sequencing.
Technical Context
The TPS65283RGET implements constant-frequency peak-current-mode control for both buck regulators, enabling stable loop compensation and fast transient response. Its 180° phase shift between Buck1 and Buck2 reduces input capacitor RMS current and EMI generation while maintaining independent output voltage regulation via dedicated FB1/FB2 pins and COMP1/COMP2 compensation nodes.
Integrated power distribution uses an N-channel MOSFET with external RSET-programmable current limit (0.15–2.7 A), reverse-voltage protection, auto-recovery overcurrent fault handling, and nFAULT open-drain signaling. The internal 6.3 V V7V LDO powers gate drivers and analog circuitry, with BST1/BST2 bootstrapping supporting 100% duty cycle operation when boot voltage exceeds 2.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and automotive supply rails without pre-regulation. |
| Buck1 Output Current | Up to 3.5 A continuous - sufficient for core logic or SoC VDD rails requiring high-current, low-noise DC-DC conversion. |
| Buck2 Output Current | Up to 2.5 A continuous - suitable for I/O, memory, or peripheral voltage domains in multi-rail systems. |
| Feedback Reference | 0.6 V ±1% - enables accurate output voltage setting down to 0.6 V with minimal resistor tolerance impact. |
| Switching Frequency | 200 kHz to 2 MHz - adjustable via ROSC resistor to optimize efficiency vs. size trade-offs in compact layouts. |
| Power Switch RDS(on) | 60 mΩ - delivers low conduction loss for 2.4–6 V input power distribution with <1.5 W dissipation at 2.5 A. |
| Thermal Shutdown | 160°C trip with 20°C hysteresis - ensures safe recovery after overload without manual reset. |
Pinout & Package
TPS65283RGET is housed in a thermally enhanced 24-pin VQFN (RGE) package measuring 4.0 mm × 4.0 mm with exposed thermal pad soldered to PGND for optimal junction-to-board thermal resistance (RθJB = 14.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Enable inputs for Buck1 and Buck2 | High-active logic with internal pullup; supports independent sequencing and delayed startup via RC networks. |
| FB1, FB2 | Output voltage feedback sensing | Connects to resistor dividers; references 0.6 V internal bandgap for precise output regulation. |
| COMP1, COMP2 | Error amplifier output and loop compensation | Accepts RC network for Type II/III compensation to stabilize peak-current-mode control loops. |
| BST1, BST2 | Bootstrap supply for high-side gate drivers | Requires 47 nF capacitor to LX1/LX2; enables 100% duty cycle operation above BOOT-LX UVLO threshold (2.1 V). |
| RSET | Power switch current limit programming | External resistor (9.1 kΩ–80.6 kΩ) sets 0.15–2.7 A current limit with ±10% accuracy at 1.25 A. |
| nFAULT | Open-drain fault indicator | Asserts low during overcurrent or reverse-voltage events on SW_OUT; debounced with 6–10 ms deglitch timing. |
| V7V | Internal 6.3 V LDO output | Powers internal bias circuits and gate drivers; requires ≥1 µF ceramic decoupling to AGND/PGND common point. |
| PGOOD1, PGOOD2 | Power-good status indicators | Open-drain outputs asserting high when respective buck output is within ±5% of target (92.5–107.5% of VFB). |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck architecture | Integrates high-side and low-side MOSFETs for Buck1 (100/65 mΩ) and Buck2 (140/95 mΩ), eliminating external switches and reducing BOM count. |
| Phase-shifted switching | Buck1 and Buck2 operate 180° out-of-phase to halve input capacitor RMS current and minimize conducted EMI in shared input rails. |
| Programmable power switch | N-channel MOSFET with adjustable current limit (0.15–2.7 A), reverse-voltage blocking, and auto-recovery fault behavior - ideal for USB hot-swap compliance. |
| Robust protection suite | Cycle-by-cycle current limiting, hiccup-mode shutdown (4 ms wait / 64 ms restart), thermal shutdown (160°C), and PGOOD supervision with 1–2 ms deglitch timing. |
| Monotonic start-up into pre-biased loads | Supports safe power sequencing where output capacitors are pre-charged, preventing reverse current flow during enable transitions. |
Applications
| USB Power Delivery Hub | Set-Top Box Power Management |
|---|---|
Use Scenario: Providing regulated 5 V and 1.2 V rails to USB peripherals and SoC subsystems in a compact media hub with hot-plug capability. IC Role / Device Role / Timing Role: Dual-buck regulator supplies core and I/O voltages; integrated power switch delivers current-limited 5 V to downstream USB ports with reverse-voltage protection. Use Value: Eliminates discrete current-limit ICs and dual buck controllers, reducing PCB area by >35% while meeting USB BC1.2 current-limit accuracy (±10%) and fault response (<10 ms). |
Use Scenario: Powering ARM-based application processor, DDR memory, and HDMI interface in consumer set-top box with strict thermal and EMI constraints. IC Role / Device Role / Timing Role: Primary PMIC delivering 1.2 V @ 3.5 A to CPU core and 5 V @ 2.5 A to peripherals; phase-shifted operation minimizes input ripple on shared 12 V supply rail. Use Value: Achieves >90% efficiency at full load (12 V input) while maintaining <15 mV load regulation across 0–3.5 A, enabling fanless thermal design in enclosed enclosures. |
| Digital TV Mainboard | Automotive Infotainment System |
Use Scenario: Generating multiple clean, sequenced rails for video processing SoC, audio codec, and display interface in ultra-thin LED TV mainboards. IC Role / Device Role / Timing Role: Dual-buck controller with independent EN1/EN2 pins enables precise power-up sequencing; PGOOD1/PGOOD2 signals coordinate system reset and firmware initialization. Use Value: Internal 2.4 ms soft-start and monotonic start-up prevent output voltage overshoot into pre-biased loads, ensuring reliable boot across temperature (-40°C to 125°C). |
Use Scenario: Supplying head-unit processor, touch controller, and CAN transceiver in automotive infotainment with 12 V battery input and stringent AEC-Q100 reliability requirements. IC Role / Device Role / Timing Role: Dual-buck + power switch provides primary 1.2 V/5 V rails plus protected 5 V output for USB accessory charging; thermal shutdown protects against under-dash ambient heat buildup. Use Value: Junction temperature monitoring and 160°C thermal trip with 20°C hysteresis ensure fail-safe shutdown before silicon damage, meeting ISO 16750-2 pulse test thermal stress limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck with power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65283-1RGET | Same pinout and specs, but operates in pulse-skipping mode (PSM) at light load instead of continuous conduction mode (CCM); lower quiescent current (0.5 mA vs 1.2 mA typical). | Preferred for battery-backed or always-on systems where standby efficiency matters more than output voltage ripple. | Select TPS65283-1RGET if light-load efficiency >85% at 10 mA is required; otherwise retain TPS65283RGET for consistent CCM performance and lower output ripple. |
| TPS65286RGET | Higher Buck1 current (4 A), same Buck2 (2.5 A), adds integrated 3.3 V LDO, but lacks power distribution switch and uses different RSET scaling (10 kΩ–100 kΩ). | Suitable for designs needing auxiliary 3.3 V rail and higher CPU current, but requires external current-limit IC for USB ports. | Choose TPS65286RGET only if 4 A Buck1 and 3.3 V LDO are mandatory; otherwise TPS65283RGET provides better integration for USB-powered applications. |
Compared with TPS65283-1RGET, TPS65283RGET offers superior light-load regulation stability at the cost of ~15% higher no-load current; versus TPS65286RGET, it trades off 0.5 A Buck1 headroom and 3.3 V LDO for integrated power switch functionality - making it the most compact solution for USB-hub and set-top box designs requiring current-limited 5 V distribution.
Availability
TPS65283RGET is available at Aetrix Electronics and suitable for USB port power management, set-top box mainboard designs, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS65283RGET 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 industrial, automotive, and consumer applications.
The TPS65283RGET belongs to TI's high-integration PMIC portfolio designed for space-constrained, multi-rail systems requiring dual-step-down conversion plus protected power distribution - targeting USB-powered consumer electronics and infotainment platforms.
FAQ
What is the maximum input voltage rating for the TPS65283RGET?
The TPS65283RGET has an absolute maximum input voltage rating of 20 V on VIN1 and VIN2 pins, with recommended operating range from 4.5 V to 18 V. Exceeding 20 V risks permanent damage per Absolute Maximum Ratings table in the datasheet. For sustained operation, keep input below 18 V to maintain thermal margin and ensure reliable 3.5 A/2.5 A output capability across temperature.
Does the TPS65283RGET support synchronization to an external clock signal?
Yes, the TPS65283RGET supports external clock synchronization via the ROSC/SYNC pin. When driven with a TTL-compatible square wave (200 kHz–2 MHz), the device automatically locks its internal oscillator to the external frequency with ±80 ns pulse width tolerance and 120 ns delay from falling edge to LX rising edge. This enables deterministic EMI reduction in noise-sensitive systems.
How is the power distribution switch current limit set on the TPS65283RGET?
The TPS65283RGET uses an external resistor connected from RSET pin to AGND to program the power switch current limit between 0.15 A and 2.7 A. With RSET = 20 kΩ, the typical limit is 1.25 A (±10% accuracy). The relationship follows IOS ≈ 25 V / RSET(kΩ); valid RSET range is 9.1 kΩ to 80.6 kΩ per datasheet Section 7.3.
What thermal management features does the TPS65283RGET include?
The TPS65283RGET integrates junction-temperature monitoring with thermal shutdown at 160°C and 20°C hysteresis, plus overtemperature protection for the power switch (145°C trip). Its 4-mm × 4-mm VQFN package features an exposed thermal pad soldered to PGND, achieving RθJB = 14.5°C/W - enabling >3 W power dissipation with standard 2-layer PCB layout and 4+ thermal vias.
Can the TPS65283RGET safely start up into a pre-biased output capacitor?
Yes, the TPS65283RGET supports monotonic start-up into pre-biased loads. Its peak-current-mode architecture and controlled soft-start (2.4 ms internal) prevent reverse current flow during enable transitions. This ensures reliable boot in systems where output capacitors retain charge from backup rails or previous power cycles - verified across –40°C to 125°C operating range.
TPS65283RGET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 9V
- Current - Output:
- 3.5A, 2.5A
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TPS65283RGET FAQ
1.How can I place an order for TPS65283RGET through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65283RGET 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 TPS65283RGET reliable?
The price and inventory of TPS65283RGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65283RGET is usually 5 days.
3.What payment methods are accepted for TPS65283RGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65283RGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65283RGET?
TPS65283RGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65283RGET 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 TPS65283RGET?
For technical support, including TPS65283RGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65283RGET requirements.
6.How does Aetrix verify that TPS65283RGET is sourced from the original manufacturer or authorized distributors?
All TPS65283RGET 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 TPS65283RGET meets industry standards.
7.What is the process for return or replacement of TPS65283RGET?
All TPS65283RGET units undergo pre-shipment inspection (PSI). If there is an issue with TPS65283RGET, 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 TPS65283RGET part is unused and in its original packaging.
Return procedure for TPS65283RGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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