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Texas Instruments TPS62040DRCR
- Part No.:
- TPS62040DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62040DRCR.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
TPS62040DRCR from Texas Instruments is an adjustable-output, synchronous step-down DC-DC converter optimized for single-cell Li-ion or 3-cell NiMH/NiCd battery-powered portable electronics. It delivers up to 1.2 A at output voltages from 0.7 V to VIN, operates from 2.5 V to 6.0 V input, switches at 1.25 MHz, and achieves up to 95% efficiency with 18 µA quiescent current - enabling long runtime in PDAs, smart phones, and USB-powered modems.
For engineers reviewing the TPS62040DRCR datasheet, TPS62040DRCR pinout, TPS62040DRCR application, or TPS62040DRCR equivalent, key selection considerations include its 10-pin QFN 3×3 mm PowerPad™ package, adjustable feedback architecture (0.5 V reference), power save mode with dynamic voltage positioning, and thermal shutdown/short-circuit protection for robust embedded power delivery.
Technical Context
The TPS62040DRCR implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling fast line/load transient response and stable operation with small 22 µF ceramic output capacitors. Its dual-MOSFET topology integrates a P-channel high-side switch (115 mΩ typical at 3.6 V) and N-channel synchronous rectifier (85 mΩ typical), supporting 100% duty cycle low-dropout operation.
It features automatic PWM/PFM mode transition based on load current, with forced PWM mode selectable via the MODE pin. The internal 0.5 V reference and FB pin allow precise output adjustment; soft-start limits inrush current, while thermal shutdown (150°C) and short-circuit protection (50% frequency/current reduction) ensure system reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.0 V - supports single Li-ion (2.7–4.2 V) and 3-cell NiMH (3.6 V nominal) battery inputs without external regulation. |
| Output Current | 1.2 A continuous - sufficient for core logic rails of DSPs, CPUs, and baseband processors in portable systems. |
| Switching Frequency | 1.25 MHz fixed (PWM mode); 625 kHz (PFM mode) - enables compact magnetics and minimizes RF interference in xDSL and communication applications. |
| Quiescent Current | 18 µA typical - extends battery life during light-load standby in always-on subsystems. |
| Feedback Reference | 0.5 V - allows precise output setting down to 0.7 V using high-impedance resistor dividers, minimizing divider current loss. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(on) MOSFETs, reducing thermal load in space-constrained QFN packages. |
| Protection Features | Thermal shutdown (150°C), short-circuit protection (50% current limit), undervoltage lockout (2.3 V threshold) - ensures safe operation under fault conditions. |
Pinout & Package
TPS62040DRCR uses a 10-pin QFN 3 mm × 3 mm package with exposed PowerPad™ thermal pad (must be soldered to PCB ground plane). The package provides low thermal resistance (48.7°C/W) and supports high-power density designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Pull high to enable converter; pull low to enter shutdown (0.1 µA ISD); must not float - requires explicit termination. |
| VIN (Pins 2,3) | Main power input | Accepts 2.5–6.0 V; dual pins reduce trace resistance and improve current handling for 1.2 A loads. |
| GND (Pin 4) | Analog ground reference | Reference for FB and control circuitry; separate from PGND to minimize noise coupling into feedback path. |
| FB (Pin 5) | Feedback input | Connects to resistor divider for adjustable output; internal 0.5 V reference enables outputs from 0.7 V to VIN. |
| MODE (Pin 6) | Operation mode select | Pull low for auto PWM/PFM; pull high for forced fixed-frequency PWM - critical for EMI-sensitive applications. |
| SW (Pins 7,8) | Power switch node | Drain connection of internal P- and N-channel MOSFETs; high di/dt node requiring minimized loop area and tight layout. |
| PGND (Pins 9,10) | Power ground return | High-current return path for inductor and MOSFETs; must connect directly to PowerPad™ and input/output capacitor grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage positioning | Maintains output 0.8% above nominal at light load, providing headroom for heavy transient drops - enables use of only 22 µF output capacitance with <1% ripple. |
| 100% duty cycle operation | Allows regulation down to VOUT + IOUT × RDS(on), extending usable battery range in Li-ion systems by up to 300 mV. |
| Internal soft-start | Digital stepped current ramp (ILIM/8 → ILIM/4 → ILIM/2 → full limit) prevents input voltage sag during startup from weak sources like batteries. |
| Synchronous rectification | Integrated N-channel MOSFET replaces Schottky diode - eliminates 0.3–0.5 V forward drop, improving efficiency by 5–10% at 1 A. |
| Power save mode | Automatically transitions to PFM below ~10 mA load, maintaining >85% efficiency even at 100 µA output current. |
Applications
| PDA / Smart Phone Core Rail | USB-Powered Modem Power |
|---|---|
Use Scenario: Supplying 1.2–1.8 V core voltage to ARM-based application processors in handheld devices with single-cell Li-ion battery input. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated, low-noise DC power with fast transient response to CPU/DSP cores. Use Value: 95% peak efficiency and 18 µA quiescent current extend battery life; dynamic voltage positioning reduces required output capacitance by 50% versus legacy solutions. | Use Scenario: Converting 5 V USB bus voltage to 3.3 V for Ethernet PHY, DSL transceiver, or Wi-Fi baseband ICs in portable modems. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) step-down converter enabling compact 6.2 µH inductor and 22 µF ceramic capacitors. Use Value: Fixed-frequency PWM mode (via MODE pin) simplifies EMI filtering; thermal shutdown protects against enclosure overheating during sustained data transmission. |
| Notebook Subsystem Rail | xDSL Line Card Bias Supply |
Use Scenario: Generating 1.5 V or 1.6 V I/O or memory interface rails in subnotebooks powered by 3-cell NiMH batteries (3.6–4.5 V). IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting multiple voltage options across TPS6204x family with shared PCB footprint. Use Value: Pin-compatible variants (TPS62042/43/44/46) allow one layout to support multiple output voltages - reducing BOM and design validation effort. | Use Scenario: Providing stable 3.3 V bias to analog front-end and line driver circuits in ADSL/VDSL customer premises equipment. IC Role / Device Role / Timing Role: High-efficiency, low-EMI DC-DC supply meeting stringent spectral mask requirements for telephone line interfaces. Use Value: 1.25 MHz switching frequency places fundamental harmonic beyond 1.1 MHz DSL band, avoiding interference with upstream/downstream data channels. |
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 |
|---|---|---|---|
| TPS62060DRVR | Higher 2.5 MHz switching frequency; lower 1.2 A max output; 0.8 V minimum output; different pinout (6-pin WSON). | Better suited for ultra-compact designs needing smaller inductors; not pin-compatible or functionally interchangeable with TPS62040DRCR. | Select TPS62060DRVR only when board space is constrained and 2.5 MHz operation is acceptable - requires new layout and component requalification. |
| TPS62240DRVR | Same 10-pin QFN package; 1.8 A output; 2.05 V to 6.0 V input; 0.6 V reference; no MODE pin (auto PFM only). | Higher current capability and wider input range, but lacks forced-PWM mode and has different feedback reference - incompatible for precision low-voltage or noise-sensitive designs. | Choose TPS62240DRVR if higher output current and simpler control (no MODE pin) are priorities, and 0.6 V reference aligns with target output voltage. |
Compared with TPS62060DRVR and TPS62240DRVR, the TPS62040DRCR uniquely balances 1.2 A output, 1.25 MHz switching, adjustable 0.7–VIN output, and MODE-controlled PWM/PFM - making it optimal for cost-sensitive, thermally constrained portable systems requiring design flexibility and proven field reliability.
Availability
TPS62040DRCR is available at Aetrix Electronics and suitable for PDA power management, USB modem DC-DC conversion, and notebook subsystem rail generation requiring stable component supply across industrial and consumer production cycles.
Supply support for TPS62040DRCR 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 TPS6204x product line was designed specifically for battery-powered portable electronics requiring high efficiency across wide load ranges, low quiescent current, and compact 3×3 mm QFN packaging - targeting PDAs, smart phones, and xDSL modems.
FAQ
What is the minimum output voltage supported by the TPS62040DRCR?
The TPS62040DRCR supports an adjustable output voltage range from 0.7 V to VIN, enabled by its internal 0.5 V feedback reference voltage and external resistor divider. This allows direct generation of low-core voltages such as 0.9 V or 1.05 V for modern processors, provided the input voltage exceeds the desired output by sufficient margin to sustain regulation under load.
Does the TPS62040DRCR require an external compensation network?
No, the TPS62040DRCR uses an internally compensated voltage-mode control architecture and does not require external compensation components. Its fast-response design with input voltage feed-forward maintains stability with standard 22 µF ceramic output capacitors and a 6.2 µH inductor, simplifying layout and reducing BOM count.
How does the MODE pin affect efficiency and noise performance of the TPS62040DRCR?
When the MODE pin is pulled low, the TPS62040DRCR operates in automatic PWM/PFM mode - maximizing efficiency across load ranges, especially at light loads (<10 mA). When pulled high, it forces fixed-frequency PWM operation at 1.25 MHz, which increases light-load quiescent current but delivers predictable EMI spectra for easier filtering in noise-sensitive applications like audio or RF subsystems.
What thermal design practices are required for reliable operation of the TPS62040DRCR?
Reliable thermal operation of the TPS62040DRCR requires soldering the exposed PowerPad™ to a solid PCB ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner or bottom-layer copper pours. Without this, junction temperature can exceed 125°C at 1.2 A load in still air. TI's SLMA002 application note details recommended copper area and via patterns for 821 mW continuous power dissipation at 85°C ambient.
Can the TPS62040DRCR be used with input voltages below 2.5 V?
No - the absolute minimum input voltage for functional operation is 2.5 V per the recommended operating conditions, and the undervoltage lockout (UVLO) threshold is 2.3 V (typical). Below 2.5 V, the device may not start or regulate properly; attempting operation near or below UVLO risks erratic switching, increased ripple, or failure to maintain output regulation, especially under load.
TPS62040DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN 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):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS62040DRCR FAQ
1.How can I place an order for TPS62040DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62040DRCR 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 TPS62040DRCR reliable?
The price and inventory of TPS62040DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62040DRCR is usually 5 days.
3.What payment methods are accepted for TPS62040DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62040DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62040DRCR?
TPS62040DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62040DRCR 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 TPS62040DRCR?
For technical support, including TPS62040DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62040DRCR requirements.
6.How does Aetrix verify that TPS62040DRCR is sourced from the original manufacturer or authorized distributors?
All TPS62040DRCR 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 TPS62040DRCR meets industry standards.
7.What is the process for return or replacement of TPS62040DRCR?
All TPS62040DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62040DRCR, 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 TPS62040DRCR part is unused and in its original packaging.
Return procedure for TPS62040DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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