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Texas Instruments TPS54260DGQ
- Part No.:
- TPS54260DGQ
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS54260DGQ.pdf
- Description:
- IC REG BUCK ADJ 2.5A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:758
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Product details
Overview
TPS54260DGQ from Texas Instruments is a 3.5-V to 60-V input, 2.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side N-channel MOSFET, Eco-mode™ pulse-skipping for light-load efficiency, and adjustable 100-kHz–2.5-MHz switching frequency. It delivers regulated 3.3-V output at up to 2.5 A in industrial power supplies requiring wide VIN tolerance and low quiescent current.
For engineers reviewing the TPS54260DGQ datasheet, TPS54260DGQ pinout, TPS54260DGQ application, or TPS54260DGQ equivalent, key selection considerations include its 138-μA no-load operating current, 1.3-μA shutdown current, 0.8-V internal reference, UV/OV powergood monitoring, and RT/CLK synchronization capability - all critical for 12-V/24-V/48-V embedded systems with sequencing and thermal robustness requirements.
Technical Context
The TPS54260DGQ implements constant-frequency peak-current-mode control with slope compensation to prevent subharmonic oscillation across 0–100% duty cycle. Its error amplifier (310-μS transconductance, 10,000 V/V DC gain) drives COMP to regulate VSENSE against a 0.8-V reference, while frequency foldback and thermal shutdown protect during overload.
It features dual-mode RT/CLK operation: resistor-set (100–2500 kHz) or external clock synchronization (300–2200 kHz), with PLL lock-in time under 100 μs. The SS/TR pin enables programmable soft-start and supply tracking via external capacitor or resistor divider, and PWRGD provides open-drain power-good signaling with 94–107% VREF window and 50-Ω on-resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports direct connection to unregulated 12-V, 24-V, and 48-V industrial rails without pre-regulation. |
| Output Current | 2.5 A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in compact industrial modules. |
| Quiescent Current | 138 μA (no load, active) - enables battery-backed or energy-harvesting applications with extended standby life. |
| Switching Frequency | 100 kHz to 2.5 MHz - allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Reference Voltage | 0.8 V ±1% - sets precise output regulation point; used with external resistor divider to configure VOUT from 0.8 V to VIN × 0.9. |
| Power-Good Threshold | 94% to 107% of VREF - ensures reliable system reset and sequencing by asserting PWRGD only when output is within tight regulation band. |
| Thermal Shutdown | 182°C junction temperature - protects against sustained overloads or poor PCB thermal design without latch-up. |
Pinout & Package
TPS54260DGQ is housed in a thermally enhanced 10-pin HVSSOP (DGQ) package measuring 3.0 mm × 3.0 mm with exposed thermal pad connected to GND. The PowerPAD™ improves thermal performance (RθJA = 62.5°C/W on standard board) and requires soldering the pad to a large GND copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1-μF ceramic capacitor between BOOT and PH; supplies gate drive voltage for high-side MOSFET - must remain >2.1 V for 100% duty cycle operation. |
| VIN | Main input supply | Accepts 3.5–60 V; powers internal circuitry and high-side switch; requires local 10-μF ceramic input capacitor near pin. |
| EN | Enable / UVLO control | Pulled up internally; float to enable; pull <1.2 V to disable; configurable UVLO threshold using resistor divider from VIN to EN to GND. |
| SS/TR | Soft-start & tracking control | External capacitor sets output ramp time; resistor divider enables supply tracking or sequencing with other rails - discharged during faults for repeatable restart. |
| RT/CLK | Frequency setting / sync input | Resistor-to-GND sets fSW (100–2500 kHz); pulled above 2.2 V to enter external clock sync mode (300–2200 kHz) with PLL lock. |
| PWRGD | Open-drain power-good output | Asserts low if VOUT <92% or >109% of nominal; deasserts (high-Z) when 94–107% - requires external pull-up for logic-level signaling. |
| VSENSE | Error amplifier inverting input | Compares feedback voltage (from resistor divider) to 0.8-V reference; determines output regulation accuracy and loop stability. |
| COMP | Error amplifier output | Drives current comparator; connects to RC compensation network (typically 1–10 nF + 1–10 kΩ) to stabilize control loop. |
| GND | Power and signal ground | Common return for VIN, PH, and thermal pad; must be low-impedance and tied directly to exposed pad for thermal and EMI performance. |
| PH | High-side switch source | Switching node connecting internal MOSFET source to inductor; requires low-inductance layout and snubber for EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse-skipping | Reduces no-load input current to 138 μA by disabling switching when light-load peak current falls below ~500 mV COMP threshold - extends battery life without compromising regulation. |
| Integrated boot diode | Eliminates external bootstrap diode; reduces BOM count and layout complexity while maintaining reliable gate drive for high-side MOSFET across full duty cycle range. |
| Adjustable UVLO with hysteresis | EN pin allows user-defined input undervoltage lockout (e.g., 15 V start, 12 V release) using two resistors - prevents brownout operation in fluctuating industrial supplies. |
| Programmable soft-start & tracking | SS/TR pin supports both fixed-time ramp-up (via capacitor) and dynamic tracking of master supply (via resistor divider) - essential for FPGA/CPU core/logic rail sequencing. |
| Overvoltage fault protection | OV comparator disables high-side MOSFET when VSENSE exceeds 109% VREF and holds off until VOUT drops below 107% - prevents damage to downstream 3.3-V logic during transient events. |
Applications
| Industrial Power Supply | GSM/GPRS Module Power |
|---|---|
|
Use Scenario: Regulating unregulated 24-V factory bus to stable 3.3-V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, sequenced, and monitored 3.3-V rail with thermal and OV protection. Use Value: 60-V max input withstands 48-V transients; 138-μA quiescent current minimizes standby loss; PWRGD enables safe firmware boot sequence. |
Use Scenario: Powering cellular modem in fleet telematics unit operating from vehicle battery (9–16 V) with cold-crank immunity. IC Role / Device Role / Timing Role: Input-tolerant DC/DC converter delivering clean 3.3-V to RF transceiver and baseband processor with soft-start to limit inrush. Use Value: 3.5-V min input supports engine cranking down to 9 V; Eco-mode extends GPS tracking battery life; SS/TR enables controlled modem wake-up. |
| Smart Meter Auxiliary Supply | Security System Sensor Hub |
|
Use Scenario: Generating 3.3-V bias from 48-V PoE or AC/DC adapter in utility smart meter with long-term reliability requirements. IC Role / Device Role / Timing Role: High-efficiency, high-reliability buck converter with UVLO hysteresis to reject line sags and surges. Use Value: 200-mΩ MOSFET enables >90% efficiency at 1 A; 150°C max junction temp suits sealed enclosures; RθJB = 28°C/W ensures thermal margin on FR4. |
Use Scenario: Centralized 3.3-V supply for multi-sensor security panel (PIR, door contact, smoke detector) powered from 12-V backup battery. IC Role / Device Role / Timing Role: Low-quiescent, fault-protected regulator enabling 5+ year battery life with periodic sensor polling. Use Value: 1.3-μA shutdown current preserves battery during alarm dormancy; PWRGD confirms rail readiness before sensor activation; RT/CLK sync avoids EMI with RF sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5–65-V input, 1.5-A, 1.2-MHz fixed-frequency; no Eco-mode; higher IQ (25 μA shutdown, 100 μA operating) | Lacks pulse-skipping; better suited for noise-sensitive automotive applications requiring strict EMI control via fixed fSW | Select LM5164QPWPRQ1 when automotive AEC-Q100 qualification and spread-spectrum EMI reduction are required over light-load efficiency. |
| TPS54360DGQ | Same package and pinout; 3.5–60-V input, 3.5-A output; 110-mΩ MOSFET; identical control architecture and feature set | Higher current rating enables shared design reuse where future headroom or parallel operation is planned | Choose TPS54360DGQ when 3.5-A output capability is needed - same layout, footprint, and compensation network with upgraded current handling. |
Compared with LM5164QPWPRQ1 and TPS54360DGQ, the TPS54260DGQ offers optimal balance of 2.5-A capability, ultra-low 138-μA operating current, and Eco-mode efficiency for space-constrained industrial and metering applications - whereas LM5164QPWPRQ1 trades efficiency for automotive compliance, and TPS54360DGQ trades cost and thermal density for higher current.
Availability
TPS54260DGQ is available at Aetrix Electronics and suitable for industrial power supplies, smart meter auxiliary rails, GSM/GPRS module power, and security system sensor hubs requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature and input voltage ranges.
Supply support for TPS54260DGQ 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 designing analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets with over 90 years of innovation and manufacturing excellence.
The TPS54260DGQ belongs to TI's high-voltage buck converter product line, engineered specifically for rugged 12-V/24-V/48-V industrial and metering applications demanding wide input range, low quiescent current, and integrated protection features - not general-purpose DC/DC conversion.
FAQ
What is the minimum input voltage required for TPS54260DGQ to start switching?
The TPS54260DGQ has an internal undervoltage lockout (UVLO) threshold of 2.5 V, but this can be raised using external resistors on the EN pin. When EN is floating, the device starts switching once VIN reaches approximately 2.5 V. For reliable startup under load, TI recommends maintaining VIN ≥3.5 V per datasheet specifications - below this, regulation and current capability are not guaranteed. The TPS54260DGQ will not operate below 3.5 V even if EN is asserted.
Can TPS54260DGQ operate at 100% duty cycle, and what conditions must be met?
Yes, the TPS54260DGQ supports 100% duty cycle operation as long as the BOOT-to-PH voltage remains above 2.1 V. This condition is maintained by proper sizing and placement of the 0.1-μF ceramic bootstrap capacitor between BOOT and PH pins. If BOOT-PH drops below 2.1 V - due to insufficient refresh during low-duty-cycle operation or capacitor ESR - the high-side MOSFET is disabled by internal UVLO, preventing dropout failure. Layout and capacitor selection are critical for true 100% duty cycle use.
How does Eco-mode™ work in TPS54260DGQ, and at what load does it activate?
Eco-mode™ in the TPS54260DGQ activates when the peak inductor current at the end of a switching cycle falls below the pulse-skipping threshold - corresponding to ~500 mV on the COMP pin. Since Eco-mode responds to peak current (not average load), the actual output current threshold depends on inductance and input/output voltage. For example, with a typical 10-μH inductor and 12-V input to 3.3-V output, Eco-mode engages near 5 mA. During Eco-mode, the TPS54260DGQ draws only 138 μA, significantly reducing light-load losses.
What is the function of the SS/TR pin in TPS54260DGQ, and how is it used for power sequencing?
The SS/TR pin in the TPS54260DGQ serves dual roles: soft-start (via external capacitor) and supply tracking (via resistor divider). For sequencing, connect SS/TR to the feedback node of a master supply - as the master rail rises, SS/TR voltage follows, forcing the TPS54260DGQ output to track it linearly. This ensures dependent rails power up in defined order (e.g., core before I/O). During faults, SS/TR is actively discharged to guarantee repeatable restart behavior - a key reliability feature absent in basic soft-start ICs.
Does TPS54260DGQ require an external bootstrap diode, and why or why not?
No, the TPS54260DGQ does not require an external bootstrap diode because it integrates an internal boot charge circuit that automatically recharges the BOOT capacitor during the low-side conduction phase. This eliminates one discrete component, reduces layout area, and improves reliability. The internal solution works with a standard 0.1-μF ceramic capacitor between BOOT and PH pins - X7R or X5R dielectric rated ≥10 V is recommended for stable performance across temperature and voltage.
TPS54260DGQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 60V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 100kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS54260DGQ FAQ
1.How can I place an order for TPS54260DGQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54260DGQ 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 TPS54260DGQ reliable?
The price and inventory of TPS54260DGQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54260DGQ is usually 5 days.
3.What payment methods are accepted for TPS54260DGQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54260DGQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54260DGQ?
TPS54260DGQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54260DGQ 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 TPS54260DGQ?
For technical support, including TPS54260DGQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54260DGQ requirements.
6.How does Aetrix verify that TPS54260DGQ is sourced from the original manufacturer or authorized distributors?
All TPS54260DGQ 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 TPS54260DGQ meets industry standards.
7.What is the process for return or replacement of TPS54260DGQ?
All TPS54260DGQ units undergo pre-shipment inspection (PSI). If there is an issue with TPS54260DGQ, 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 TPS54260DGQ part is unused and in its original packaging.
Return procedure for TPS54260DGQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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