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Texas Instruments TPS54240QDGQRQ1
- Part No.:
- TPS54240QDGQRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS54240QDGQRQ1.pdf
- Description:
- IC REG BCK SPLIT RAIL ADJ 10SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,346
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Product details
Overview
TPS54240QDGQRQ1 from Texas Instruments is an automotive-grade 42-V input, 2.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, Eco-mode™ pulse-skipping control, and adjustable 100 kHz–2.5 MHz switching frequency. It delivers regulated 3.3 V or 5 V output in compact MSOP-10 PowerPAD™ packaging for vehicle infotainment power rails, E-meter auxiliary supplies, and GSM module biasing.
For engineers reviewing the TPS54240QDGQRQ1 datasheet, TPS54240QDGQRQ1 pinout, TPS54240QDGQRQ1 application, or TPS54240QDGQRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), 138 μA light-load quiescent current, 0.8-V internal reference, open-drain PWRGD monitoring, and RT/CLK pin synchronization capability.
Technical Context
This current-mode buck regulator implements fixed-frequency PWM control with slope compensation to prevent subharmonic oscillation across full duty cycle range. Its transconductance error amplifier (310 μA/V typical) compares VSENSE against either the 0.8-V internal reference or SS/TR tracking voltage, enabling precise output regulation and sequencing.
The device integrates boot UVLO protection (2.1 V BOOT-PH threshold), frequency foldback during overload, and thermal shutdown at 182°C. The EN pin supports adjustable undervoltage lockout using external resistors, while the PWRGD comparator asserts low when VSENSE falls outside 94%–107% of nominal output voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports 12 V and 24 V automotive battery systems with cold-crank margin |
| Output Current | 2.5 A continuous - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock on RT/CLK pin for EMI optimization |
| Quiescent Current | 138 μA - enables always-on subsystems without excessive battery drain |
| Reference Voltage | 0.8 V ±2% - sets output voltage accuracy with external resistor divider (e.g., 3.3 V or 5 V) |
| Power-Good Threshold | 94% to 107% of VOUT - provides reliable system reset signaling with hysteresis |
| Thermal Shutdown | 182°C - protects against sustained overload or poor PCB thermal design |
Pinout & Package
TPS54240QDGQRQ1 uses a thermally enhanced MSOP-10 PowerPAD™ package with exposed thermal pad (Pin 11) requiring solder connection to PCB ground plane for thermal performance (θJA = 62.5°C/W standard board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (1) | Bootstrap capacitor node | Supplies gate drive for high-side MOSFET; requires 0.1 μF X7R/X5R ceramic capacitor to PH |
| VIN (2) | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side switch; connects to input bulk capacitor |
| EN (3) | Enable control input | Pull below 1.25 V to disable; internal 0.9 μA pullup enables default operation when floating |
| SS/TR (4) | Slow-start/tracking input | Controls output ramp time via external capacitor; supports power sequencing with resistor divider |
| RT/CLK (5) | Frequency setting/sync input | Resistor-to-ground sets fSW; external clock edges synchronize switching via PLL |
| PWRGD (6) | Open-drain power-good output | Asserts low if VSENSE < 94% or > 107% of target; requires external pullup resistor |
| PH (10) | High-side MOSFET source | Connects to inductor; forms switching node with BOOT and GND; critical for EMI layout |
| GND (9) | Power and signal ground | Common return for VIN, PH, COMP, VSENSE; must connect to thermal pad for thermal integrity |
| COMP (8) | Error amplifier output | Drives PWM comparator; connects to Type II/III compensation network (R-C-R-C to GND) |
| VSENSE (7) | Feedback input | Inverting input of gm amplifier; monitors output via resistor divider; referenced to 0.8 V internal bandgap |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse-skipping | Reduces light-load quiescent current to 138 μA while maintaining regulation and PWRGD functionality |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM Class H2 and CDM Class C6 ESD robustness |
| Integrated boot diode | Eliminates external bootstrap diode, reducing BOM count and improving reliability in high-vibration environments |
| Adjustable UVLO with hysteresis | EN pin supports programmable input undervoltage lockout using two resistors, preventing brownout resets |
| Overvoltage protection | PWRGD comparator triggers high-side MOSFET shutdown when VSENSE exceeds 109%, limiting output overshoot |
Applications
| Automotive Infotainment Power Supply | GSM/GPRS Module Biasing |
|---|---|
Use Scenario: Powers ARM-based head unit SoCs and display drivers from 12 V battery with transient immunity during load dump. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V/5 V rail; PWRGD signals MCU reset controller upon undervoltage. Use Value: 42 V max input withstands ISO 7637-2 Pulse 5a (load dump); Eco-mode extends battery life in parked mode. | Use Scenario: Supplies 3.3 V to cellular modem in fleet telematics units operating across wide temperature ranges. IC Role / Device Role / Timing Role: Regulated power source with slow-start sequencing to avoid inrush into RF front-end components. Use Value: AEC-Q100 qualification ensures reliability in under-hood mounting; SS/TR pin enables controlled power-up timing. |
| Industrial E-Meter Auxiliary Rail | Security System Sensor Interface |
Use Scenario: Generates isolated 5 V bias for metrology ADC and real-time clock in smart electricity meters. IC Role / Device Role / Timing Role: Secondary regulator fed from main 24 V industrial bus; RT/CLK synchronized to system clock for EMI reduction. Use Value: 100 kHz–2.5 MHz frequency range allows optimal inductor size trade-off; 200 mΩ RDS(on) minimizes thermal rise in sealed enclosures. | Use Scenario: Provides clean 3.3 V supply to motion sensors and door contact interfaces in automotive alarm systems. IC Role / Device Role / Timing Role: Always-on regulator with ultra-low 138 μA quiescent current; EN pin tied to vehicle ignition signal for sleep/wake control. Use Value: Shutdown current of 1.3 μA prevents battery drain during extended parking; PWRGD confirms rail stability before sensor activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143AQDGQRQ1 | 42 V, 3 A, dual-channel synchronous buck with spread-spectrum EMI reduction | Supports dual-rail designs; higher current rating but larger footprint and higher cost | Choose for multi-output systems requiring tighter EMI compliance or >2.5 A per channel |
| TPS54340QDGQRQ1 | 42 V, 3.5 A, identical pinout and feature set except higher current rating and 150 mΩ RDS(on) | Direct drop-in replacement where higher output current is required without layout change | Choose when load current exceeds 2.5 A but same thermal and control behavior is needed |
Compared with LM5143AQDGQRQ1 and TPS54340QDGQRQ1, TPS54240QDGQRQ1 offers optimal balance of size, efficiency, and cost for single-rail 2.5 A applications, with proven thermal performance in MSOP-10 PowerPAD™ and minimal external component count.
Availability
TPS54240QDGQRQ1 is available at Aetrix Electronics and suitable for automotive infotainment power supplies, GSM/GPRS module biasing, and industrial E-meter auxiliary rails requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for TPS54240QDGQRQ1 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 over 50 years of automotive electronics experience.
The TPS54240-Q1 product line delivers high-reliability, wide-input DC/DC converters designed specifically for automotive body electronics, telematics, and infotainment systems requiring AEC-Q100 qualification and robust transient response.
FAQ
What is the maximum input voltage rating for TPS54240QDGQRQ1?
The TPS54240QDGQRQ1 has an absolute maximum input voltage rating of 47 V, with recommended operating input voltage from 3.5 V to 42 V. This range supports 12 V and 24 V automotive battery systems including cold-crank and load-dump conditions. Exceeding 42 V during normal operation risks violating recommended limits, though brief transients up to 47 V are tolerated per absolute maximum ratings.
How does the Eco-mode™ control scheme improve efficiency in TPS54240QDGQRQ1?
The Eco-mode™ control scheme in TPS54240QDGQRQ1 reduces switching activity at light loads by entering pulse-skipping mode when peak inductor current falls below ~500 mV on the COMP pin. This lowers gate-drive and switching losses, achieving 138 μA operating quiescent current. The TPS54240QDGQRQ1 maintains regulation and PWRGD functionality throughout Eco-mode operation without compromising startup or fault recovery behavior.
Can TPS54240QDGQRQ1 be synchronized to an external clock signal?
Yes, TPS54240QDGQRQ1 supports external clock synchronization via the RT/CLK pin. When driven with a logic-level clock signal above the 1.9 V high threshold, the internal PLL locks to the external frequency, aligning PH switching edges to falling clock edges. This capability enables EMI reduction in multi-regulator systems and deterministic timing for noise-sensitive applications like audio or RF circuits.
What is the purpose of the SS/TR pin on TPS54240QDGQRQ1?
The SS/TR (Slow-Start/Tracking) pin on TPS54240QDGQRQ1 controls output voltage ramp rate during startup and enables power-supply sequencing. Connecting a capacitor to this pin sets soft-start time; coupling a resistor divider allows tracking of another supply rail. During faults or disable events, the TPS54240QDGQRQ1 actively discharges the SS/TR capacitor to ensure repeatable restart behavior and prevent latch-up after thermal or UVLO events.
Is thermal pad connection mandatory for TPS54240QDGQRQ1 operation?
Yes, the exposed thermal pad (Pin 11) of TPS54240QDGQRQ1 must be electrically and thermally connected to the PCB ground plane using adequate solder coverage and thermal vias. This connection is essential for achieving specified thermal resistance (θJA = 62.5°C/W) and preventing junction temperature exceedance. Failure to connect the thermal pad results in degraded thermal performance, premature thermal shutdown, and potential reliability failure under sustained 2.5 A load conditions.
TPS54240QDGQRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS54240QDGQRQ1 FAQ
1.How can I place an order for TPS54240QDGQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54240QDGQRQ1 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 TPS54240QDGQRQ1 reliable?
The price and inventory of TPS54240QDGQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54240QDGQRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54240QDGQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54240QDGQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54240QDGQRQ1?
TPS54240QDGQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54240QDGQRQ1 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 TPS54240QDGQRQ1?
For technical support, including TPS54240QDGQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54240QDGQRQ1 requirements.
6.How does Aetrix verify that TPS54240QDGQRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54240QDGQRQ1 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 TPS54240QDGQRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54240QDGQRQ1?
All TPS54240QDGQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54240QDGQRQ1, 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 TPS54240QDGQRQ1 part is unused and in its original packaging.
Return procedure for TPS54240QDGQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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