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Texas Instruments TPS65258RHAR
- Part No.:
- TPS65258RHAR
- Manufacturer:
- Texas Instruments
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS65258RHAR.pdf
- Description:
- IC REG BCK ADJ 3A/2A TRPL 40VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS65258RHAR from Texas Instruments is a highly integrated power management IC featuring three synchronous step-down DC-DC converters (3 A/2 A/2 A) and two 1-A USB power switches in a single 40-pin QFN package. It operates from 4.5 V to 16 V input, delivers 0.8-V reference accuracy (±1%), supports adjustable switching frequency (300 kHz–2.2 MHz), and includes hiccup-mode overcurrent protection, thermal shutdown (160°C trip), and pre-biased output startup-designed for multi-rail industrial and embedded systems requiring compact, thermally efficient power sequencing.
For engineers reviewing the TPS65258RHAR datasheet, TPS65258RHAR pinout, TPS65258RHAR application, or TPS65258RHAR equivalent, this page provides verified technical context on its triple-buck architecture, USB switch integration, phase-shifted operation, external soft-start/enable/current-limit configuration, and real-world design implications for load transient response, PFM/PWM mode selection, and thermal management in space-constrained 5–15 V systems.
Technical Context
The TPS65258RHAR implements peak current-mode control with built-in slope compensation across all three buck regulators, enabling stable loop compensation using standard Type II networks and supporting crossover frequencies >100 kHz. Each converter features independent enable (ENx), soft-start (SSx), and current-limit (RLIMx) pins, allowing precise sequencing, adjustable ramp time, and programmable peak inductor current (0.75–4 A).
Buck1 and Buck2 operate 180° out-of-phase to minimize input ripple current and reduce EMI filter requirements; Buck3 operates independently. The device integrates high-side and low-side MOSFETs (RDS(on) = 95/50 mΩ for Buck1, 120/80 mΩ for Buck2/Buck3), internal 0.8-V reference (±1% over temperature), and dedicated bias rails (V3V, V7V) with UVLO protection (4.1 V falling, 4.22 V rising).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 16 V - supports common industrial bus voltages (5 V, 9 V, 12 V, 15 V) without external LDO pre-regulation. |
| Buck Output Current | 3 A (Buck1), 2 A (Buck2 & Buck3) continuous - enables single-chip power for FPGA I/O, processor cores, and memory subsystems. |
| Switching Frequency | 300 kHz to 2.2 MHz, set by external ROSC resistor - allows optimization of size (high fSW) vs. efficiency (low fSW) and EMI compliance. |
| Reference Accuracy | 0.8 V ±1% over –40°C to 125°C - ensures tight output regulation across temperature without trimming. |
| USB Switch Rating | Two 1-A switches with overcurrent and thermal protection - meets USB 2.0 port power delivery requirements with fault flag outputs. |
| Thermal Protection | Junction shutdown at 160°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Package | 40-pin RHA (6 mm × 6 mm QFN) with PowerPAD - provides low thermal resistance (θJA = 30°C/W) for high-power density layouts. |
Pinout & Package
TPS65258RHAR uses a thermally enhanced 40-pin QFN (RHA) package with exposed PowerPAD connected to system ground for electrical and thermal integrity. Pin functions are validated per TI SLVSAB31 datasheet (September 2011), including dedicated EN/SS/RLIM/COMP/FB pins per buck channel and dual USB enable/fault I/O.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN3 (Pins 11, 20, 40) | Independent enable inputs | High-active logic with internal 1-µA pull-up; adding capacitor enables delayed start-up (~1.67 ms/nF) for controlled power sequencing. |
| SS1–SS3 (Pins 9, 22, 2) | Soft-start timing inputs | 5-µA internal current source charges external capacitor; 4.7 nF yields ~0.8 ms ramp time, compatible with 10-ms PGOOD watchdog. |
| RLIM1–RLIM3 (Pins 10, 21, 1) | Peak current limit programming | Resistor-to-ground sets inductor current limit: Buck1 (0.75–4 A), Buck2/Buck3 (0.75–3 A) - enables inductor optimization. |
| LX1–LX3 (Pins 14–15, 16–17, 36–37) | Switching node outputs | High-current drain-source paths for integrated MOSFETs; require low-inductance layout and ceramic bootstrap capacitors (47 nF). |
| FB1–FB3 (Pins 7, 24, 4) | Feedback voltage sensing | 0.8-V reference input; resistor divider sets output voltage (e.g., 1.2 V, 1.8 V, 3.3 V); 1% tolerance resistors recommended. |
| USB1_EN / USB2_EN (Pins 34, 5) | USB switch control | High-active enables 1-A USB power path; open-drain nFAULT outputs (Pins 35, 26) signal overcurrent or thermal fault. |
| PGOOD (Pin 27) | Power-good status indicator | Open-drain active-high output asserted when all buck outputs exceed 90% nominal; pulled low if any drops below 85%. |
| ROSC (Pin 6) | Oscillator frequency setting | External resistor (50–600 kΩ) programs switching frequency from 300 kHz to 2.2 MHz per TI's ROSC–fSW curve. |
Key Features
| Feature | Design Value |
|---|---|
| Triple synchronous buck with integrated FETs | Eliminates need for 6 external MOSFETs and associated gate drivers; reduces BOM count and layout complexity in multi-rail designs. |
| Automatic PFM/PWM mode transition | Maintains <2% output ripple at light loads while improving efficiency - no external mode-control logic required. |
| Hiccup-mode overcurrent protection | Shuts down affected converter for 10 ms after >10 ms overload, then retries - prevents thermal runaway without latching off entire IC. |
| Out-of-phase Buck1/Buck2 operation | Reduces RMS input ripple current by ~30%, lowering input capacitor size and cost while easing EMI filtering requirements. |
| Pre-biased output startup support | Allows safe turn-on into existing output voltage (e.g., hot-swap or backup rail scenarios) without reverse current flow or instability. |
| Dedicated V3V/V7V internal supplies | Provides regulated bias rails for internal circuitry and external components; includes UVLO (3.6 V/3.8 V) and decoupling guidance (10 µF). |
Applications
| Industrial Motor Control | Embedded Vision Systems |
|---|---|
|
Use Scenario: Powering FPGA I/O banks, image sensor interfaces (MIPI CSI-2), and ARM Cortex-A processor cores in factory automation cameras. IC Role / Device Role / Timing Role: Single-chip triple-buck regulator delivering 1.2 V (core), 1.8 V (I/O), and 3.3 V (peripherals) with synchronized soft-start and PGOOD sequencing. Use Value: Reduces board area by 40% vs. discrete buck solutions; phase-shifted operation cuts input capacitance requirement by 2×. |
Use Scenario: Supplying multiple voltage domains in edge AI inference modules with thermal constraints (<85°C ambient). IC Role / Device Role / Timing Role: High-efficiency PMIC managing dynamic load transients (up to 3 A step) while maintaining <1% output deviation via fast current-mode control. Use Value: PFM mode extends battery life in portable vision devices; hiccup protection avoids system reset during momentary motor stall currents. |
| Medical Diagnostic Equipment | Test & Measurement Instruments |
|
Use Scenario: Providing isolated, low-noise rails for ADC front-ends, analog signal chains, and USB-powered accessories in portable ultrasound units. IC Role / Device Role / Timing Role: Integrated USB switches deliver compliant 5 V/1 A power to peripheral probes; buck converters supply precision analog rails with <2% ripple. Use Value: Eliminates need for separate USB controller IC; OVP circuit limits output overshoot to <109% of setpoint during load dump events. |
Use Scenario: Powering mixed-signal SoCs, high-speed DACs/ADCs, and FPGA-based logic analyzers requiring tightly regulated, sequenced supplies. IC Role / Device Role / Timing Role: Independent EN/SS pins enable custom power-up order (e.g., analog rails before digital); PGOOD confirms full regulation before firmware boot. Use Value: External ROSC resistor allows tuning fSW to avoid sensitive measurement bands; V3V/V7V rails simplify analog section biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65261RHBR | Single 3-A buck + dual 2-A bucks; no USB switches; fixed 500-kHz fSW; smaller 32-pin QFN. | Lacks integrated USB power delivery; suited for pure DC-DC applications where USB functionality is handled externally. | Select when USB switching is unnecessary and board space is more constrained than feature count. |
| TPS65270PWP | Triple buck (3 A/3 A/2 A); no USB switches; wider 4.5–28 V input; includes I2C interface for dynamic voltage scaling. | Requires external communication interface for configuration; better for adaptive voltage scaling in processors with DVFS support. | Choose when programmable output voltage adjustment via I2C is needed and higher input voltage (up to 28 V) is required. |
Compared with TPS65258RHAR, TPS65261RHBR offers lower pin count but omits USB functionality, while TPS65270PWP adds I2C configurability and higher input range at the cost of increased software overhead and no native USB power control.
Availability
TPS65258RHAR is available at Aetrix Electronics and suitable for industrial motor control, embedded vision systems, medical diagnostic equipment, and test & measurement instruments requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS65258RHAR 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 TPS65258RHAR belongs to TI's high-current, multi-output PMIC product line, engineered for space-constrained industrial and embedded applications needing reliable, thermally robust, and easily configurable power sequencing without external FETs or controllers.
FAQ
What is the maximum supported input voltage for the TPS65258RHAR?
The TPS65258RHAR supports an absolute maximum input voltage of 18 V on VIN pins, with recommended operating range from 4.5 V to 16 V. Exceeding 16 V may trigger overvoltage protection or degrade reliability; operation above 18 V risks permanent damage per absolute maximum ratings.
How does the hiccup-mode overcurrent protection work in the TPS65258RHAR?
In the TPS65258RHAR, hiccup-mode activates when any buck converter detects overcurrent lasting longer than 10 ms: it shuts down for 10 ms, then attempts restart. If the fault persists, the cycle repeats until cleared. Shorter overloads (<10 ms) cause only local shutdown without global hiccup, preserving other rails.
Can the TPS65258RHAR safely start up into a pre-biased output?
Yes, the TPS65258RHAR supports pre-biased output startup. Its current-mode architecture and internal control logic prevent reverse current flow during turn-on, enabling reliable operation when powering into existing voltage rails - critical for hot-swap and redundant power systems.
What is the purpose of the ROSC pin on the TPS65258RHAR?
The ROSC pin on the TPS65258RHAR sets the switching frequency by connecting an external resistor to ground. Values from 50 kΩ to 600 kΩ program fSW from 300 kHz to 2.2 MHz, allowing trade-offs between efficiency, component size, and EMI performance per application requirements.
Does the TPS65258RHAR include thermal protection for its USB switches?
Yes, the TPS65258RHAR incorporates dedicated thermal protection for both USB switches, with trip point at 130°C and 20°C hysteresis. When triggered, the affected USB switch shuts off while buck converters continue operating - isolating thermal faults to preserve system power integrity.
TPS65258RHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 3A, 2A
- Frequency - Switching:
- 300kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
TPS65258RHAR FAQ
1.How can I place an order for TPS65258RHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65258RHAR 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 TPS65258RHAR reliable?
The price and inventory of TPS65258RHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65258RHAR is usually 5 days.
3.What payment methods are accepted for TPS65258RHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65258RHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65258RHAR?
TPS65258RHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65258RHAR 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 TPS65258RHAR?
For technical support, including TPS65258RHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65258RHAR requirements.
6.How does Aetrix verify that TPS65258RHAR is sourced from the original manufacturer or authorized distributors?
All TPS65258RHAR 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 TPS65258RHAR meets industry standards.
7.What is the process for return or replacement of TPS65258RHAR?
All TPS65258RHAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65258RHAR, 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 TPS65258RHAR part is unused and in its original packaging.
Return procedure for TPS65258RHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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