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Texas Instruments TPS54623RHLR
- Part No.:
- TPS54623RHLR
- Manufacturer:
- Texas Instruments
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
TPS54623RHLR.pdf
- Description:
- IC REG BUCK ADJ 6A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,164
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Product details
Overview
TPS54623RHLR from Texas Instruments is a 4.5-V to 17-V input, 6-A synchronous step-down DC/DC converter in thermally enhanced VQFN-14 package. It integrates 26 mΩ high-side and 19 mΩ low-side MOSFETs, supports 200 kHz–1.6 MHz switching frequency, delivers ±1% 0.6-V reference accuracy over temperature, and features hiccup-mode overcurrent protection and monotonic start-up into pre-biased outputs-used in high-density point-of-load regulation for networking infrastructure.
For engineers reviewing the TPS54623RHLR datasheet, TPS54623RHLR pinout, TPS54623RHLR application, or TPS54623RHLR equivalent, key selection considerations include light-load pulse-skipping efficiency, split-rail PVIN/VIN power architecture (1.6 V–17 V on PVIN), adjustable input UVLO via EN pin resistors, thermal hiccup shutdown at 160°C–175°C, and compatibility with WEBENCH® Power Designer for custom design.
Technical Context
This device implements constant-frequency peak-current-mode control with integrated slope compensation to prevent subharmonic oscillation across full duty cycle range. Its dual-input architecture separates control rail (VIN: 4.5 V–17 V) from power rail (PVIN: 1.6 V–17 V), enabling flexible biasing in distributed systems.
The error amplifier uses transconductance (1300 μA/V) with COMP pin for external frequency compensation, while BOOT-PH UVLO (2.1 V typical) enables 100% duty-cycle operation when boot capacitor voltage remains above threshold. Hiccup protection triggers after 512 cycles of sustained overcurrent and enforces 16384-cycle restart delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | VIN: 4.5 V–17 V; PVIN: 1.6 V–17 V - enables split-rail operation for improved efficiency in low-voltage power stages |
| Output Current | 6 A continuous - supports high-density POL applications without external current sharing |
| Switching Frequency | 200 kHz–1.6 MHz - adjustable via RT/CLK resistor or external clock sync for EMI optimization and inductor size reduction |
| Voltage Reference | 0.6 V ±1% over –40°C to +150°C - ensures stable output regulation under wide thermal and load conditions |
| MOSFET RDS(on) | HS: 26 mΩ, LS: 19 mΩ @ VBOOT-PH = 6 V - minimizes conduction loss and improves full-load efficiency |
| Quiescent Current | 2 µA shutdown, ~600 µA non-switching - extends battery life in always-on systems and reduces standby power |
| Thermal Protection | Junction shutdown at 160°C–175°C with 10°C hysteresis and hiccup timing (16384 cycles) - prevents thermal runaway without latch-off |
Pinout & Package
TPS54623RHLR is housed in a 3.5 mm × 3.5 mm, 14-pin VQFN package with exposed thermal pad (RHL suffix). The thermally enhanced layout requires soldering the pad to PCB ground plane for optimal junction-to-board thermal resistance (RθJB = 11.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (13) | Bootstrap supply node | Connects external capacitor to PH to generate gate drive voltage for high-side MOSFET; monitored by BOOT-PH UVLO |
| PH (11,12) | Power switch node | Drives external inductor; dual pins reduce trace inductance and improve current handling in high-frequency operation |
| GND (2,3) | Signal and power return | Dual ground pins isolate control circuitry return from low-side MOSFET source path to minimize noise coupling |
| PVIN (4,5) | Power input rail | Supplies high-current path to internal MOSFETs; supports down to 1.6 V for low-voltage intermediate bus architectures |
| VIN (6) | Control circuit supply | Provides bias to internal logic, gate drivers, and error amplifier; independent of PVIN for flexible system partitioning |
| EN (10) | Enable and UVLO control | Internal pullup allows floating enable; external resistor divider sets custom undervoltage lockout thresholds |
| SS/TR (9) | Slow-start/tracking reference | Controls output ramp rate via external capacitor; overrides internal 0.6-V reference for sequencing or tracking |
| VSENSE (7) | Feedback input | Inverting input of gm error amplifier; monitors output via resistor divider to regulate VOUT = 0.6 V × (1 + R1/R2) |
| COMP (8) | Error amplifier output | Connects external RC network for loop compensation; sets phase margin and transient response performance |
| PWRGD (14) | Open-drain power-good flag | Asserts low if VSENSE falls below 92% or exceeds 106% of Vref; used for system power sequencing and fault detection |
| RT/CLK (1) | Frequency setting/sync input | Configures switching frequency via resistor (200 kHz–1.6 MHz) or synchronizes to external clock falling edge |
| Exposed Thermal Pad (15) | Thermal and electrical ground | Must be soldered to PCB ground plane; primary heat dissipation path with RθJC(bot) = 1.8°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | 26 mΩ HS / 19 mΩ LS RDS(on) eliminates external FETs and gate drivers, reducing BOM count and layout area |
| Split-rail power architecture | Independent VIN (4.5 V–17 V) and PVIN (1.6 V–17 V) inputs allow optimized biasing for low-voltage intermediate buses |
| Light-load pulse-skipping mode | Disables switching below ~1 A peak inductor current, reducing quiescent consumption to ~2 µA in shutdown |
| Hiccup-mode overcurrent protection | Triggers after 512 consecutive overcurrent cycles and enforces 16384-cycle recovery delay to prevent thermal damage |
| Monotonic start-up into pre-biased outputs | Blocks low-side sinking until SS/TR > 1.4 V, preventing output discharge during hot-plug or multi-rail sequencing |
| Adjustable power-good window | PWRGD asserts only when VSENSE is 94%–104% of Vref, providing precise undervoltage/overvoltage fault detection |
Applications
| High-Density Distributed Power | Networking Point-of-Load Regulation |
|---|---|
|
Use Scenario: Compact 1U server blade with multiple ASICs requiring isolated, tightly regulated 1.2-V/3.3-V rails from 12-V intermediate bus. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 6-A continuous current with fast transient response and minimal footprint. Use Value: Integrated MOSFETs and 3.5-mm VQFN package reduce solution size by >30% vs discrete controllers; split-rail PVIN supports direct 1.8-V intermediate bus use. |
Use Scenario: Optical line terminal (OLT) with FPGA, SERDES, and analog front-end ICs demanding low-noise, sequenced 1.0-V and 2.5-V supplies. IC Role / Device Role / Timing Role: Configurable slow-start and tracking controller coordinating power-up order across multiple rails using SS/TR and PWRGD signals. Use Value: Monotonic start-up prevents reverse current into pre-biased rails; PWRGD feedback enables safe enable/disable sequencing without external supervisors. |
| Broadband Infrastructure | Industrial Embedded Control |
|
Use Scenario: DOCSIS 4.0 cable modem with high-speed data converters and RF front-end requiring ultra-stable 1.8-V supply with <1% ripple. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter operating at 800 kHz to avoid sensitive IF bands while maintaining >92% efficiency at 4-A load. Use Value: Peak-current-mode control with slope compensation ensures stability with ceramic output capacitors; ±1% Vref guarantees tight output tolerance across temperature. |
Use Scenario: Programmable logic controller (PLC) I/O module needing robust 5-V/3.3-V rails tolerant of 24-V field wiring transients and wide ambient temperatures. IC Role / Device Role / Timing Role: Industrial-grade buck converter with –40°C to +150°C junction rating, hiccup OCP, and thermal shutdown for uncooled enclosures. Use Value: 17-V absolute max input withstands load-dump events; thermal hiccup (16384-cycle delay) allows self-recovery after temporary overload without system reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54622RHLR | Same pinout and package, but rated for 5-A output current and lacks hiccup-mode OCP (uses latched shutdown instead) | Suitable for lower-current designs where latch-off is acceptable; not recommended for systems requiring automatic recovery after overload | Select TPS54622RHLR only if 5-A rating suffices and hiccup behavior is unnecessary; verify thermal derating at full load |
| MP2451DT-LF-Z | 3-A rated, 4.5–28-V input, no split-rail PVIN/VIN, fixed 0.8-V reference, no SS/TR or PWRGD pins | Targeted at cost-sensitive, single-rail applications without sequencing or precision tracking needs | Choose MP2451DT-LF-Z for simpler, lower-cost 3-A designs lacking advanced features; not drop-in compatible due to pin count and function differences |
Compared with TPS54623RHLR, TPS54622RHLR offers identical layout compatibility but sacrifices hiccup recovery and 1-A higher current capability, while MP2451DT-LF-Z trades feature depth and current rating for broader input range and lower unit cost-making TPS54623RHLR optimal for 6-A, thermally constrained, and sequenced POL systems.
Availability
TPS54623RHLR is available at Aetrix Electronics and suitable for high-density distributed power systems, networking point-of-load regulation, and broadband infrastructure applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS54623RHLR 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 technologies, with decades of expertise in high-efficiency DC/DC conversion and automotive-grade reliability.
The TPS54623RHLR belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for high-current, space-constrained point-of-load applications in communications, computing, and industrial systems where thermal performance and feature integration are critical.
FAQ
What is the maximum continuous output current supported by the TPS54623RHLR?
The TPS54623RHLR supports up to 6 A of continuous output current under recommended operating conditions (TJ ≤ 150°C, proper PCB thermal design). This rating assumes adequate heatsinking via the exposed thermal pad and use of appropriate external components (inductor, input/output capacitors) sized for 6-A operation. Derating applies at elevated ambient temperatures or reduced airflow.
Does the TPS54623RHLR support synchronization to an external clock signal?
Yes, the TPS54623RHLR supports external clock synchronization via the RT/CLK pin. When driven with a clean CMOS-level clock signal, the device locks its internal oscillator to the falling edge of the external clock, enabling deterministic switching alignment across multiple converters to reduce beat frequencies and EMI peaks. Frequency range must fall within 200 kHz–1.6 MHz.
How does the TPS54623RHLR handle start-up into a pre-biased output voltage?
The TPS54623RHLR ensures monotonic start-up into pre-biased outputs by disabling low-side MOSFET sinking until the SS/TR pin voltage exceeds 1.4 V. This prevents reverse current flow from the output into the converter during hot-plug or multi-rail sequencing scenarios, protecting downstream components and ensuring controlled voltage ramp-up.
What protection features are implemented in the TPS54623RHLR?
The TPS54623RHLR integrates hiccup-mode overcurrent protection (triggered after 512 overcurrent cycles), thermal shutdown with 160°C–175°C trip point and 10°C hysteresis, BOOT-PH UVLO (2.1 V), output overvoltage protection (PWRGD asserts at >106% Vref), and input undervoltage lockout on both VIN and PVIN rails. All protections are fully internal and require no external components.
Can the TPS54623RHLR operate with a 100% duty cycle?
Yes, the TPS54623RHLR can operate at 100% duty cycle as long as the BOOT-PH voltage remains above the UVLO threshold of 2.1 V (typical). This condition is maintained by the internal boot recharge circuit, which pulls PH low to refresh the bootstrap capacitor. Sustained 100% duty cycle is usable for low-dropout applications where VOUT approaches VIN.
What is the purpose of the split-rail VIN and PVIN inputs on the TPS54623RHLR?
The split-rail architecture separates control circuitry supply (VIN: 4.5 V–17 V) from power switch supply (PVIN: 1.6 V–17 V), enabling efficient operation from low-voltage intermediate buses (e.g., 1.8 V or 3.3 V) while maintaining full functionality of the control logic. This improves system efficiency and flexibility in multi-rail power architectures.
TPS54623RHLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 14-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 1.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VQFN (3.5x3.5)
TPS54623RHLR FAQ
1.How can I place an order for TPS54623RHLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54623RHLR 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 TPS54623RHLR reliable?
The price and inventory of TPS54623RHLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54623RHLR is usually 5 days.
3.What payment methods are accepted for TPS54623RHLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54623RHLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54623RHLR?
TPS54623RHLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54623RHLR 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 TPS54623RHLR?
For technical support, including TPS54623RHLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54623RHLR requirements.
6.How does Aetrix verify that TPS54623RHLR is sourced from the original manufacturer or authorized distributors?
All TPS54623RHLR 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 TPS54623RHLR meets industry standards.
7.What is the process for return or replacement of TPS54623RHLR?
All TPS54623RHLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54623RHLR, 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 TPS54623RHLR part is unused and in its original packaging.
Return procedure for TPS54623RHLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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