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Texas Instruments TPS54240DRCT
- Part No.:
- TPS54240DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54240DRCT.pdf
- Description:
- IC REG BCK SPLIT RAIL ADJ 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:161
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Product details
Overview
TPS54240DRCT from Texas Instruments is a 42-V input, 2.5-A synchronous step-down DC-DC converter with integrated 200-mΩ high-side MOSFET, Eco-Mode™ for light-load efficiency, 138-μA quiescent current, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated 3.3-V or 5-V outputs in industrial power systems requiring wide VIN range and robust thermal performance.
For engineers reviewing the TPS54240DRCT datasheet, TPS54240DRCT pinout, TPS54240DRCT application, or TPS54240DRCT equivalent, key selection criteria include its 3.5–42-V input range, pulse-skipping Eco-Mode operation, UVLO adjustability via EN pin, open-drain PWRGD monitoring, and thermal-enhanced 10-pin VSON (3 mm × 3 mm) package with PowerPAD™.
Technical Context
The TPS54240DRCT implements constant-frequency peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty cycle range. Its error amplifier drives COMP pin with 310-μS transconductance and 2.7-MHz bandwidth, enabling stable loop response with minimal external compensation.
It integrates boot UVLO (2.1 V threshold), frequency foldback during overload, thermal shutdown at 182°C, and an internal PLL on RT/CLK pin supporting both resistor-set frequency and external clock synchronization. The SS/TR pin enables programmable soft-start and supply sequencing via external capacitor or resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports 12-V and 24-V industrial rails with margin for transients and ripple. |
| Output Current | 2.5 A continuous - sufficient for powering microcontrollers, sensors, and communication modules without external heatsinking. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT/CLK resistor or external clock; enables optimization of inductor size and efficiency. |
| Quiescent Current | 138 μA in Eco-Mode - extends battery life in always-on low-power applications such as fleet telematics. |
| Shutdown Current | 1.3 μA - minimizes system standby power loss when disabled via EN pin. |
| Reference Voltage | 0.8 V ±1.2% - sets output voltage accuracy; used with external resistor divider for precise VOUT programming. |
| Power Good Threshold | 94% to 107% of VREF - provides reliable system reset signaling with built-in hysteresis for noise immunity. |
Pinout & Package
The TPS54240DRCT is housed in a thermally enhanced 10-pin VSON package (3.00 mm × 3.00 mm) with exposed PowerPAD™ for improved heat dissipation. Thermal resistance θJCbot is 7.8°C/W, enabling high-power density designs without additional heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 3.5–42 V; powers internal circuitry and high-side MOSFET gate driver. |
| GND | Ground reference | Common return path; must be connected to PCB ground plane and PowerPAD™. |
| PH | High-side MOSFET source | Connects to inductor; forms switching node with BOOT capacitor for gate drive. |
| BOOT | Bootstrap supply | Requires 0.1-μF ceramic capacitor to PH; enables 100% duty cycle operation down to VIN – VOUT ≥ 2.1 V. |
| VSENSE | Error amplifier inverting input | Monitors feedback voltage; compares to 0.8-V internal reference to regulate output. |
| COMP | Error amplifier output | Drives current-mode comparator; connects to RC network for loop compensation. |
| EN | Enable / UVLO control | Pull below 1.2 V to disable; floating enables operation; external resistors adjust UVLO threshold. |
| RT/CLK | Frequency setting / sync input | Resistor-to-ground sets fSW; pulled above 2.2 V switches to external clock sync mode. |
| SS/TR | Soft-start / tracking control | Capacitor sets ramp time; resistor divider enables supply sequencing with other rails. |
| PWRGD | Open-drain power-good indicator | Asserts low if VOUT deviates beyond ±6% of nominal; requires external pullup for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-Mode™ Pulse Skipping | Reduces switching losses at light loads, achieving >85% efficiency at 10-mA output while drawing only 138-μA input current. |
| Adjustable UVLO with Hysteresis | EN pin allows user-defined startup/shutdown thresholds using two resistors, preventing brownout oscillation in fluctuating 12-V/24-V systems. |
| Integrated Boot Diode | Eliminates need for external bootstrap diode, reducing BOM count and PCB area in space-constrained industrial modules. |
| Overvoltage Protection via PWRGD | OV comparator disables high-side MOSFET when VSENSE exceeds 109% of VREF, limiting output overshoot during load dump or transient events. |
| Thermal Shutdown with Recovery | Shuts down at 182°C junction temperature and automatically restarts after cooldown, ensuring safe operation under sustained overload. |
Applications
| Industrial Power Supply | GSM/GPRS Telematics Module |
|---|---|
Use Scenario: Providing stable 3.3-V rail to PLC I/O modules operating from unregulated 24-V factory bus with ±15% ripple and frequent cold cranking. IC Role / Device Role / Timing Role: Primary buck regulator delivering 2.5-A continuous output with Eco-Mode maintaining efficiency at partial load during sensor polling cycles. Use Value: 3.5–42-V input range tolerates bus dips to 18 V; 138-μA quiescent current reduces standby power in sleep-mode automation nodes. | Use Scenario: Powering LTE modem and GPS receiver in vehicle tracking unit powered by automotive battery (9–16 V) with engine-off deep-sleep requirements. IC Role / Device Role / Timing Role: Main DC-DC converter generating 5-V and 3.3-V supplies; PWRGD signals host MCU when output is valid during cold start. Use Value: Adjustable UVLO prevents false turn-on during cranking; 1.3-μA shutdown current extends battery life over months of idle operation. |
| Smart Meter Power Management | Security System Sensor Hub |
Use Scenario: Converting 12-V backup battery to regulated 3.3-V for metrology IC and RF transceiver in AMI smart meters with tamper detection. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown and overvoltage protection to ensure uninterrupted metering during grid faults. Use Value: 42-V absolute max rating withstands 30-V surge tests per IEC 61000-4-5; PowerPAD™ enables conduction cooling in sealed enclosures. | Use Scenario: Supplying 3.3-V to motion sensors, door contact monitors, and Zigbee radio in battery-backed home security panel. IC Role / Device Role / Timing Role: Low-quiescent buck regulator enabling multi-year battery life; SS/TR pin synchronizes power-up with system controller. Use Value: 138-μA operating current and programmable soft-start minimize inrush into large decoupling banks, avoiding brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | Automotive-grade AEC-Q100 qualified; 3–65-V input; 0.6-A output; no integrated high-side FET (external required). | Designed for automotive infotainment and ADAS; lacks Eco-Mode and PWRGD; requires external MOSFET and gate driver. | Select for automotive safety-critical systems needing qualification; not drop-in due to lower current and missing features. |
| MP2451DT-LF-Z | 3–36-V input; 0.6-A output; fixed 2-MHz switching; 25-μA IQ; no PWRGD or UVLO adjustment. | Targeted at compact consumer electronics; smaller solution size but insufficient current for 2.5-A industrial loads. | Choose for cost-sensitive, low-current portable devices; not suitable as functional replacement for TPS54240DRCT's 2.5-A capability. |
Compared with LM5164QDDARQ1 and MP2451DT-LF-Z, the TPS54240DRCT uniquely combines 2.5-A output, Eco-Mode efficiency, adjustable UVLO, and integrated PWRGD in a thermally optimized 3-mm × 3-mm package-making it optimal for industrial and telematics applications demanding reliability, flexibility, and high current density.
Availability
TPS54240DRCT is available at Aetrix Electronics and suitable for industrial power supplies, telematics modules, and smart metering systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54240DRCT 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 TPS54240DRCT belongs to TI's SWIFT™ family of high-voltage DC-DC converters, engineered specifically for rugged industrial, automotive, and communications applications where wide input range, thermal resilience, and feature-rich regulation are critical.
FAQ
What is the maximum continuous output current supported by the TPS54240DRCT?
The TPS54240DRCT supports up to 2.5 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB layout with PowerPAD™ thermal connection). This rating assumes adequate copper area and airflow; derating applies above 85°C ambient. The device includes overcurrent protection that limits peak switch current to 3.5–6.1 A depending on junction temperature.
Does the TPS54240DRCT require an external bootstrap diode?
No, the TPS54240DRCT does not require an external bootstrap diode. It integrates a boot charge circuit that refreshes the BOOT-to-PH capacitor during low-side conduction, eliminating the need for discrete diodes and reducing component count and board space in the TPS54240DRCT design.
How is the switching frequency set on the TPS54240DRCT?
The switching frequency of the TPS54240DRCT is set using a resistor from RT/CLK to GND, supporting 100 kHz to 2.5 MHz. For example, a 200-kΩ resistor yields ~500 kHz. Alternatively, the pin accepts an external clock signal (300–2200 kHz) when pulled above 2.2 V, enabling synchronization with system timing in multi-rail power architectures.
Can the TPS54240DRCT operate with input voltage below 3.5 V?
No, the TPS54240DRCT is not specified to operate below 3.5 V input. Its absolute minimum operating input voltage is 3.5 V per datasheet Section 6.3. Attempting operation below this may result in unstable regulation, failure to start, or undefined behavior - the TPS54240DRCT requires ≥3.5 V on VIN to enable internal bias generation and gate drive functionality.
What is the function of the SS/TR pin on the TPS54240DRCT?
The SS/TR pin on the TPS54240DRCT controls soft-start timing and supply sequencing. Connecting a capacitor sets output voltage ramp time to limit inrush current; connecting a resistor divider enables tracking of another supply rail. During fault recovery, the TPS54240DRCT actively discharges this pin to ensure repeatable restart behavior after thermal or UVLO events.
TPS54240DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Split Rail
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 39V
- 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-VSON (3x3)
TPS54240DRCT FAQ
1.How can I place an order for TPS54240DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54240DRCT 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 TPS54240DRCT reliable?
The price and inventory of TPS54240DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54240DRCT is usually 5 days.
3.What payment methods are accepted for TPS54240DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54240DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54240DRCT?
TPS54240DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54240DRCT 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 TPS54240DRCT?
For technical support, including TPS54240DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54240DRCT requirements.
6.How does Aetrix verify that TPS54240DRCT is sourced from the original manufacturer or authorized distributors?
All TPS54240DRCT 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 TPS54240DRCT meets industry standards.
7.What is the process for return or replacement of TPS54240DRCT?
All TPS54240DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54240DRCT, 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 TPS54240DRCT part is unused and in its original packaging.
Return procedure for TPS54240DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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