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Texas Instruments TPS541620RPBR
- Part No.:
- TPS541620RPBR
- Manufacturer:
- Texas Instruments
- Package:
- 25-PowerVFQFN
- Datasheet:
-
TPS541620RPBR.pdf
- Description:
- IC REG BUCK ADJ 6A/6A DL 25VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
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Product details
Overview
TPS541620RPBR from Texas Instruments is a dual-channel synchronous step-down DC-DC converter with integrated 24-mΩ/10-mΩ MOSFETs, supporting dual 6-A outputs or single 12-A interleaved operation across 4.5–15-V input and 0.5–5.5-V output ranges. It implements fixed-frequency advanced current mode (ACM) control with internal compensation and operates in a 3-mm × 5-mm, 25-pin VQFN-HR package for high-density power delivery in FPGA/ASIC core and I/O rails.
For engineers reviewing the TPS541620RPBR datasheet, TPS541620RPBR pinout, TPS541620RPBR application, or TPS541620RPBR equivalent, key selection considerations include its dual-phase current sharing accuracy (±15% at ≥3 A), 1-ms fixed soft-start in dual-output mode, four selectable switching frequencies (500 kHz to 2 MHz), and true differential remote sensing capability for multi-phase stability.
Technical Context
The TPS541620RPBR uses an internally compensated advanced current mode (ACM) architecture with emulated ramp generation, eliminating external compensation components while enabling stable operation with low-ESR MLCC output capacitors. Its dual-phase interleaving reduces input/output ripple and improves transient response via 180° phase shift between SW1 and SW2.
Pin-strapped configuration via MODE1 and MODE2 selects operating mode (dual independent vs. single 12-A), switching frequency (500 kHz/1 MHz/1.5 MHz/2 MHz), ramp amplitude (1.5 pF–6 pF), and clock phase delay. Synchronization is supported through SYNC input and CLKO output with ±20% timing variation tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 15 V - supports wide industrial and telecom input rails without pre-regulation |
| Output Current Capability | Dual 6-A or single 12-A - enables flexible rail partitioning or high-current consolidation |
| Switching Frequency Options | 500 kHz / 1 MHz / 1.5 MHz / 2 MHz - balances efficiency (low fSW) vs. size (high fSW) |
| Feedback Reference Voltage | 500 mV ±1% - enables precise regulation down to 0.5 V output with standard resistor dividers |
| Thermal Shutdown Threshold | 165°C with 20°C hysteresis - ensures reliable overtemperature recovery without oscillation |
| Current Limit Accuracy | Peak HS limit: 8.0–11.5 A; Valley LS limit: 6.2–9.0 A - provides robust cycle-by-cycle protection |
| Package | VQFN-HR (RPB), 3 mm × 5 mm, 25-pin, 0.5-mm pitch - optimized for thermal dissipation and EMI layout |
Pinout & Package
TPS541620RPBR is housed in a 3-mm × 5-mm, 25-pin VQFN-HR (RPB) package with exposed thermal pad. Pin spacing is 0.5 mm; no lead finish or RoHS exemption noted in source documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT1, BOOT2 | Bootstrap supply for high-side gate drivers | Requires 100-nF ceramic capacitor to respective SW node; enables full enhancement of integrated 24-mΩ HS FETs |
| SW1, SW2 | Power stage switch nodes | Direct connection points to output inductors; support phase-interleaved operation with 180° offset |
| FB1, FB2/VSHARE | Feedback inputs | FB1 sets channel 1 output; FB2/VSHARE enables voltage sharing in multi-phase mode or channel 2 regulation |
| EN1, EN2/ISHARE | Enable inputs with current-share control | Independent enable logic; EN2 doubles as ISHARE pin to configure current balancing between channels |
| PGOOD1, PGOOD2/CLKO | Open-drain power-good indicators | PGOOD1 monitors channel 1; PGOOD2/CLKO serves dual role - channel 2 status or synchronized clock output |
| MODE1, MODE2 | Configuration strapping pins | Resistor-to-ground selection determines phase mode, frequency, ramp amplitude, and clock delay settings |
| SYNC | External clock synchronization input | Accepts 500 kHz–2 MHz external clock; overrides internal oscillator for system-level timing alignment |
| GOSNS, AGND | Remote sense ground and analog reference | GOSNS enables true differential remote sensing in multi-phase; AGND must tie to PGND at single point |
Key Features
| Feature | Design Value |
|---|---|
| Integrated lossless current sensing | Eliminates external sense resistors using MOSFET RDS(on) - preserves efficiency and reduces BOM count |
| Fixed-frequency ACM control with internal compensation | Reduces design time and external component count; supports stable loop bandwidth across 0.5–5.5 V outputs |
| True differential remote sensing | Maintains ±1% output regulation under load-step transients by rejecting PCB trace IR drop in multi-phase setups |
| Configurable soft start | 1-ms fixed in dual-output mode; externally adjustable via SS capacitor in single-output/multi-phase configurations |
| Safe pre-biased start-up | Prevents reverse inductor current during hot-plug scenarios - avoids discharging pre-charged output capacitors |
| Four PWM ramp options per frequency | Enables optimization of control-loop phase margin for varying inductor values and output capacitance types |
Applications
| ASIC/FPGA Core Power | Industrial Ethernet Switches |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.8–1.2 V core voltage to high-performance ASICs or FPGAs with dynamic current demands up to 12 A. IC Role / Device Role / Timing Role: Dual-phase buck controller providing interleaved 6-A per rail or consolidated 12-A output with <1% output voltage deviation under 6-A step loads. Use Value: Achieves >90% peak efficiency at 12 A/1 V with 1-MHz switching, minimizing thermal footprint in space-constrained compute modules. |
Use Scenario: Generating multiple isolated 3.3-V, 5-V, and 12-V rails for PHY, MAC, and management subsystems in Layer-3 switches. IC Role / Device Role / Timing Role: Dual-output regulator powering separate 3.3-V I/O and 12-V PoE interface rails with independent enable and PGOOD signaling. Use Value: Enables independent sequencing and fault isolation - PGOOD1 asserts before PGOOD2, ensuring safe power-up order without external supervisors. |
| Wireless Baseband Processing | Test & Measurement Equipment |
|
Use Scenario: Supplying clean, low-noise 1.8-V and 2.5-V rails to RF transceivers and ADC/DAC front-ends in 5G massive MIMO units. IC Role / Device Role / Timing Role: Dual-output converter with phase interleaving reducing input ripple by 70% versus single-phase - critical for EMI-sensitive RF sections. Use Value: Delivers <10 mVpp output ripple at 6 A/1.8 V using 22-µF X5R MLCCs, meeting spectral purity requirements for adjacent-channel interference. |
Use Scenario: Providing programmable, high-accuracy bias supplies for precision analog signal chains in automated test equipment (ATE). IC Role / Device Role / Timing Role: Precision-regulated 5-V rail with 500-mV reference and ±1% feedback accuracy - used for DAC reference and op-amp supply. Use Value: Maintains ±0.5% output regulation over –40°C to +85°C ambient, enabling sub-LSB measurement accuracy without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8770GQ-Z (Monolithic Power) | 4.5–18-V input; dual 6-A; 500 kHz–2.2 MHz fSW; no integrated remote sensing amplifier | Lacks true differential remote sense - requires external circuitry for multi-phase voltage matching | Preferred when higher input voltage margin (18 V) is required and remote sensing is not critical |
| ISL9122AIRTZ-T7A (Renesas) | 2.5–5.5-V input; dual 4-A; 1.5–6 MHz fSW; supports DVS but no phase interleaving | Lower input range limits use to battery-powered systems; no 12-A consolidation mode | Selected for portable instrumentation where ultra-low quiescent current (25 µA) outweighs high-current capability |
Compared with MP8770GQ-Z and ISL9122AIRTZ-T7A, the TPS541620RPBR uniquely combines 12-A consolidation, true differential remote sensing, and pin-strapped ACM loop tuning - making it optimal for high-density, thermally constrained infrastructure power designs requiring ±1% regulation at full load.
Availability
TPS541620RPBR is available at Aetrix Electronics and suitable for wireless infrastructure, industrial Ethernet switches, and ASIC/FPGA power delivery requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for TPS541620RPBR 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, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC-DC conversion.
The TPS541620RPBR belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for high-current, space-constrained applications in communications infrastructure and computing where thermal performance and multi-phase flexibility are critical.
FAQ
What is the maximum continuous output current per channel for TPS541620RPBR?
The TPS541620RPBR supports up to 6 A continuous DC output current per channel in dual-output mode. When configured for single-output, multi-phase operation, it delivers up to 12 A total by interleaving both channels. Thermal derating applies above 85°C ambient; full 6-A/channel operation is validated at TJ ≤ 125°C with proper PCB copper area and airflow.
Does TPS541620RPBR require external compensation components?
No, the TPS541620RPBR features fixed-frequency advanced current mode (ACM) control with internal compensation. Its loop is stabilized using pin-strapped ramp amplitude selection (via MODE2), eliminating the need for external Type-II or Type-III compensation networks. This reduces BOM count and layout complexity while maintaining stability across 0.5–5.5 V output voltages.
How does TPS541620RPBR handle pre-biased output conditions during start-up?
The TPS541620RPBR supports safe pre-biased start-up by inhibiting SW pulses until the internal soft-start voltage exceeds the FB pin voltage. During the first eight switching cycles, the low-side FET is disabled to prevent reverse inductor current, avoiding discharge of pre-charged output capacitors. This behavior is inherent to the ACM control architecture and requires no external circuitry.
What is the function of the FB2/VSHARE pin on TPS541620RPBR?
On the TPS541620RPBR, the FB2/VSHARE pin serves dual functions: in dual-output mode, it acts as the feedback input for channel 2; in multi-phase (single-output) mode, it becomes the voltage-sharing node (VSHARE) that connects to the FB1 pin of a second TPS541620RPBR or enables internal current balancing between channels using the ISHARE function on EN2.
Can TPS541620RPBR synchronize to an external clock, and what is the acceptable frequency range?
Yes, the TPS541620RPBR accepts an external clock via the SYNC pin and can synchronize across 500 kHz to 2 MHz. The CLKO pin provides a buffered copy of the internal or synchronized clock. Timing variation between SYNC input and SW edges is specified at ±20%, ensuring robust lock-in even with jittery system clocks - critical for noise-sensitive mixed-signal systems.
TPS541620RPBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 25-PowerVFQFN
- 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):
- 15V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A, 6A
- Frequency - Switching:
- 500kHz, 1MHz, 1.5MHz, 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-VQFN-HR (3x5)
TPS541620RPBR FAQ
1.How can I place an order for TPS541620RPBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS541620RPBR 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 TPS541620RPBR reliable?
The price and inventory of TPS541620RPBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS541620RPBR is usually 5 days.
3.What payment methods are accepted for TPS541620RPBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS541620RPBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS541620RPBR?
TPS541620RPBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS541620RPBR 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 TPS541620RPBR?
For technical support, including TPS541620RPBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS541620RPBR requirements.
6.How does Aetrix verify that TPS541620RPBR is sourced from the original manufacturer or authorized distributors?
All TPS541620RPBR 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 TPS541620RPBR meets industry standards.
7.What is the process for return or replacement of TPS541620RPBR?
All TPS541620RPBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS541620RPBR, 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 TPS541620RPBR part is unused and in its original packaging.
Return procedure for TPS541620RPBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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