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Texas Instruments TPS65283-1RGET
- Part No.:
- TPS65283-1RGET
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS65283-1RGET.pdf
- Description:
- IC REG BUCK ADJ DL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
TPS65283-1RGET from Texas Instruments is a synchronous dual-buck DC-DC converter with integrated power distribution switch, delivering up to 3.5 A on Buck1 (1.2 V output) and 2.5 A on Buck2 (5 V output) from a 4.5–18 V input. It features 0.6 V ±1% feedback reference, pulse-skipping mode (PSM) at light load, and 60 mΩ N-channel power switch for USB/industrial power rail management.
For engineers reviewing the TPS65283-1RGET datasheet, TPS65283-1RGET pinout, TPS65283-1RGET application, or TPS65283-1RGET equivalent, this page delivers verified specifications, validated pin functions, confirmed PSM operation mode, exact thermal shutdown thresholds (160°C buck / 145°C switch), and real-world current-limit accuracy (±10% at 1.25 A) - all critical for pre-biased load startup, automotive infotainment power sequencing, and compact USB hub designs.
Technical Context
The TPS65283-1RGET implements constant-frequency peak-current-mode control with 180° out-of-phase switching between Buck1 and Buck2 to minimize input ripple and capacitor size. Its internal 2.4-ms soft-start, cycle-by-cycle current limiting, and hiccup-mode protection (4 ms wait / 64 ms restart) ensure robustness during short-circuit events.
It integrates two independent synchronous buck controllers with dedicated BST/LX/COMP/FB pins per channel, plus a standalone N-channel power switch controlled via SW_EN with programmable current limit (via RSET resistor, 9.1–80.6 kΩ), reverse-voltage protection, and auto-recovery overcurrent response asserted on nFAULT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-range industrial and automotive inputs without external pre-regulation. |
| Buck1 Output Current | Up to 3.5 A continuous - sufficient for core logic rails (e.g., SoC cores at 1.2 V). |
| Buck2 Output Current | Up to 2.5 A continuous - powers peripheral rails like USB PHYs or DDR termination at 5 V. |
| Feedback Reference | 0.6 V ±1% - enables precise low-voltage regulation with minimal resistor divider error. |
| Switching Frequency | 200 kHz to 2 MHz - adjustable via ROSC resistor to balance efficiency vs. EMI/filter size. |
| Power Switch RDS(on) | 60 mΩ - delivers ≤2.7 A load current with <165 mV dropout at 2.75 A (typical). |
| Light-Load Mode | Pulse-skipping mode (PSM) - reduces quiescent current to 0.5 mA (non-switching) for standby efficiency. |
| Thermal Shutdown | 160°C (buck), 145°C (switch) with 20°C hysteresis - prevents latch-up during sustained overload. |
Pinout & Package
TPS65283-1RGET uses a thermally enhanced 24-pin VQFN (RGE) package, 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 (Pin 2) | Buck1 enable input | Active-high TTL-compatible control; internal pullup allows auto-start when floated. |
| EN2 (Pin 3) | Buck2 enable input | Independent enable for staggered power sequencing in multi-rail systems. |
| SW_EN (Pin 5) | Power switch enable | Float-to-enable logic; decouples switch control from buck regulators for flexible power gating. |
| nFAULT (Pin 6) | Open-drain fault indicator | Asserts low during overcurrent or reverse-voltage events; deglitched for 6–10 ms to reject transients. |
| RSET (Pin 15) | Current-limit programming | External resistor sets power switch current threshold (0.15–1.75 A range) with ±10% accuracy at 1.25 A. |
| V7V (Pin 23) | Internal LDO output | 6.3 V bias rail powering gate drivers; requires ≥1 µF ceramic decoupling to PGND for MOSFET conduction stability. |
| PGOOD1/PGOOD2 (Pins 24/1) | Output voltage monitors | Open-drain indicators asserting high only when respective buck output is within ±5% of target (0.6 V ref). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual synchronous buck | Eliminates 4 external MOSFETs and bootstrap diodes - reduces BOM count and layout area by >30%. |
| PSM at light load | Reduces no-load quiescent current to 0.5 mA, extending battery life in always-on USB hubs or set-top boxes. |
| 180° phase-shifted switching | Cuts input RMS current ripple by ~30%, enabling smaller input capacitors and lower EMI filter cost. |
| Dedicated power distribution switch | Provides precision current limiting (programmable 0.15–2.7 A) and reverse-voltage blocking - replaces discrete eFuse + MOSFET solutions. |
| Monotonic start-up into pre-biased loads | Prevents output voltage overshoot when powering rails already charged by other supplies - critical for FPGA/SoC sequencing. |
| Thermal and hiccup protection | Shuts down on die temperature >160°C (buck) or >145°C (switch); auto-restarts after cooldown - avoids system lockup during transient overloads. |
Applications
| USB Power Delivery Hub | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Dual-rail USB 3.0 hub requiring 1.2 V core supply and 5 V VBUS-compatible port power with overcurrent protection. IC Role / Device Role / Timing Role: Primary PMIC managing both SoC core voltage (Buck1) and switched 5 V rail (Buck2 + power switch) with coordinated PGOOD sequencing. Use Value: Integrated 60 mΩ switch eliminates need for external eFuse; ±10% current-limit accuracy ensures reliable USB port compliance under varying cable/connector resistance. |
Use Scenario: Central display unit needing isolated 1.2 V processor core and 5 V backlight/USB OTG rails with thermal resilience in cabin environments. IC Role / Device Role / Timing Role: Dual-buck regulator with independent EN1/EN2 enables staggered startup of CPU before peripherals; PSM extends idle time in parked vehicle mode. Use Value: 160°C thermal shutdown and 145°C switch protection prevent latch-up during hot-car scenarios; VQFN package withstands automotive thermal cycling. |
| DSL/Cable Modem Power System | Digital TV Main Board |
Use Scenario: Compact broadband gateway requiring efficient 1.2 V SoC rail and 5 V PHY/ethernet interface rail with surge-tolerant power switch. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck converters and load switches; nFAULT signals upstream controller during PoE-induced overcurrent events. Use Value: 2.4 ms internal soft-start prevents inrush into large Ethernet magnetics; ROSC-programmable frequency avoids noise coupling into RF front-end. |
Use Scenario: High-density main board where space constraints demand integration of 1.2 V CPU core, 5 V HDMI/USB, and protected auxiliary 5 V rail. IC Role / Device Role / Timing Role: Dual-buck + switch consolidates three power domains; AGND/V7V separation minimizes analog video noise coupling into digital supply rails. Use Value: 0.6 V ±1% reference enables tight regulation tolerance for modern ARM-based media processors; PGOOD1/PGOOD2 support safe boot sequence validation. |
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 |
|---|---|---|---|
| TPS65283RGET | Continuous conduction mode (CCM) instead of PSM; higher light-load quiescent current (0.5 mA vs. 0.5 mA non-switching, but CCM draws more at light load). | Suitable for noise-sensitive audio/video rails where PSM ripple is unacceptable; less ideal for battery-backed standby. | Select TPS65283RGET if strict CCM operation is required for EMI compliance; otherwise TPS65283-1RGET offers superior light-load efficiency. |
| TPS65270RGET | Single-buck + power switch (no Buck2); 3 A max Buck1 current; no PGOOD2 or FB2/COMP2 pins. | Lacks dual-output capability - cannot replace TPS65283-1RGET in systems requiring independent 1.2 V and 5 V rails. | Only consider for cost-constrained single-rail designs; not a functional substitute for dual-buck functionality. |
Compared with TPS65283RGET, the TPS65283-1RGET trades slightly higher mid-load efficiency for significantly better standby performance via PSM, while TPS65270RGET omits Buck2 entirely - making it unsuitable for any application requiring two regulated outputs.
Availability
TPS65283-1RGET is available at Aetrix Electronics and suitable for USB hubs, automotive infotainment systems, and DSL/cable modems requiring stable component supply, long-term lifecycle support, and automotive-grade thermal resilience.
Supply support for TPS65283-1RGET 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 automotive qualification.
The TPS65283-1RGET belongs to TI's high-integration PMIC portfolio targeting space-constrained consumer and automotive applications, designed to consolidate multiple power rails and protection functions into a single 4-mm × 4-mm package.
FAQ
What is the key difference between TPS65283-1RGET and TPS65283RGET?
The TPS65283-1RGET operates in pulse-skipping mode (PSM) at light load to minimize quiescent current (0.5 mA non-switching), while the TPS65283RGET uses continuous conduction mode (CCM). This makes the TPS65283-1RGET more efficient in standby but introduces low-frequency ripple; the TPS65283RGET provides smoother output at the cost of higher light-load power draw. Both share identical pinout, package, and maximum current ratings.
Does TPS65283-1RGET support pre-biased load startup?
Yes, the TPS65283-1RGET is explicitly designed for monotonic start-up into pre-biased loads. Its current-mode architecture and controlled soft-start (2.4 ms internal) prevent output voltage overshoot when powering rails already charged by other sources - a critical requirement for FPGA, SoC, and multi-PMIC systems.
How is the power switch current limit set on TPS65283-1RGET?
The power switch current limit on TPS65283-1RGET is programmed using an external resistor connected to the RSET pin (Pin 15). With RSET values from 9.1 kΩ to 80.6 kΩ, the current limit ranges from 0.15 A to 1.75 A (±10% accuracy at 1.25 A). The relationship is inverse: lower RSET yields higher current limit.
What thermal protection mechanisms does TPS65283-1RGET include?
The TPS65283-1RGET includes separate thermal shutdown circuits: buck converters trip at 160°C (20°C hysteresis), and the power switch trips at 145°C (20°C hysteresis). Both trigger automatic shutdown and auto-restart after cooldown. Additionally, hiccup-mode overcurrent protection limits MOSFET dissipation during sustained shorts (4 ms wait, then 64 ms restart cycle).
Can TPS65283-1RGET synchronize its switching frequency to an external clock?
Yes, the ROSC/SYNC pin (Pin 4) supports clock synchronization. When an external clock signal (200–2000 kHz) is applied, the TPS65283-1RGET automatically synchronizes both buck channels to that frequency - eliminating beat frequencies and easing EMI filtering in multi-converter systems.
TPS65283-1RGET 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)
TPS65283-1RGET FAQ
1.How can I place an order for TPS65283-1RGET through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65283-1RGET 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 TPS65283-1RGET reliable?
The price and inventory of TPS65283-1RGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65283-1RGET is usually 5 days.
3.What payment methods are accepted for TPS65283-1RGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65283-1RGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65283-1RGET?
TPS65283-1RGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65283-1RGET 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 TPS65283-1RGET?
For technical support, including TPS65283-1RGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65283-1RGET requirements.
6.How does Aetrix verify that TPS65283-1RGET is sourced from the original manufacturer or authorized distributors?
All TPS65283-1RGET 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 TPS65283-1RGET meets industry standards.
7.What is the process for return or replacement of TPS65283-1RGET?
All TPS65283-1RGET units undergo pre-shipment inspection (PSI). If there is an issue with TPS65283-1RGET, 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 TPS65283-1RGET part is unused and in its original packaging.
Return procedure for TPS65283-1RGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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