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Texas Instruments TPS62040DGQ
- Part No.:
- TPS62040DGQ
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62040DGQ.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:376
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Product details
Overview
TPS62040DGQ from Texas Instruments is an adjustable-output, synchronous step-down DC-DC converter optimized for single-cell Li-Ion and 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 TPS62040DGQ datasheet, TPS62040DGQ pinout, TPS62040DGQ application, or TPS62040DGQ equivalent, key selection criteria include its adjustable 0.7–VIN output range, PowerPAD-enhanced 10-pin MSOP package, automatic PWM/PFM mode switching via MODE pin, dynamic voltage positioning for transient response, and integrated thermal shutdown/short-circuit protection.
Technical Context
The TPS62040DGQ implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling tight line/load regulation using small ceramic capacitors. Its dual-MOSFET power stage includes P-channel (115–210 mΩ) and N-channel (85–200 mΩ) switches, supporting 100% duty cycle operation for ultra-low dropout during battery depletion.
It features a digitally controlled soft-start sequence stepping switch current limits (ILIM/8 → ILIM/4 → ILIM/2 → 1.85 A), programmable power-save mode with PFM at light loads (transition current ≈ VI/18.66), and fixed-frequency PWM forced operation when MODE = high - critical for noise-sensitive xDSL and audio subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.0 V - supports full discharge of single Li-Ion (2.7–4.2 V) and 3-cell NiMH (3.6–4.5 V) batteries without external regulators. |
| Output Voltage Range | 0.7 V to VIN - adjustable via external resistor divider (VREF = 0.5 V), enabling direct supply to low-voltage DSPs and core logic. |
| Max Output Current | 1.2 A - sustained delivery under thermal limits with PowerPAD MSOP package and proper PCB copper area. |
| Switching Frequency | 1.25 MHz (typical) - enables compact 6.2 µH inductor and 22 µF ceramic input/output capacitors; drops to 625 kHz in PFM mode. |
| Quiescent Current | 18 µA (typical) - maintains high light-load efficiency in always-on subsystems like real-time clocks or sensor interfaces. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(on) MOSFETs, reducing heat generation in space-constrained handhelds. |
| Protection Features | Thermal shutdown (150°C), short-circuit protection (50% current limit reduction), undervoltage lockout (1.5–2.3 V), and internal soft-start - eliminates need for external supervision circuitry. |
Pinout & Package
The TPS62040DGQ uses a thermally enhanced 10-pin MSOP PowerPad™ package (3.0 mm × 3.0 mm × 1.0 mm), where the exposed PowerPAD must be soldered to PCB ground plane with thermal vias for optimal junction-to-board thermal resistance (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Pull high to enable; pull low to enter shutdown (0.1 µA IQ); must not float - prevents unintended startup or oscillation. |
| 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 load. |
| GND (Pin 4) | Analog reference ground | Separate from PGND; connects to feedback network and control circuitry - requires star grounding to avoid noise coupling into FB. |
| FB (Pin 5) | Feedback input | Connects to resistor divider for adjustable output; internal 0.5-V reference enables precise VO setting; sensitive to noise - requires shielded routing. |
| MODE (Pin 6) | Operation mode select | Low = auto PWM/PFM; high = forced PWM - used to eliminate frequency variation in EMI-critical applications like RF front-ends. |
| SW (Pins 7,8) | Power switch node | Drain connection of internal P- and N-channel MOSFETs; high dv/dt node - must be minimized in layout to reduce EMI and ringing. |
| PGND (Pins 9,10) | Power ground return | High-current return path for inductor and MOSFETs; tied to PowerPAD - requires low-inductance connection to minimize ground bounce. |
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 while meeting ±3% regulation. |
| 100% Duty Cycle Operation | Enables regulation down to VIN − VO ≈ IO × rDS(on) - extends usable battery life by extracting energy until input falls within ~100 mV of output voltage. |
| Integrated Soft-Start | Digital ramp-up of switch current limit (ILIM/8 → ILIM/4 → ILIM/2 → 1.85 A) - prevents input voltage sag during startup from weak sources like coin cells or supercaps. |
| Power Save Mode | Automatically transitions from 1.25 MHz PWM to ~625 kHz PFM below ITRANSITION ≈ VI/18.66 - sustains >85% efficiency at 1 mA load without external control. |
| Thermal & Short-Circuit Protection | Shuts down P/N switches at TJ ≥ 150°C; reduces switching frequency and current limit by 50% if VO < 50% of nominal - protects against board-level faults without latch-up. |
Applications
| PDA / Pocket PC Power Management | USB-Powered Modem Supply |
|---|---|
Use Scenario: Regulating single Li-Ion battery (2.7–4.2 V) to 1.8 V for ARM-based application processor and memory subsystem. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.2 A with dynamic voltage positioning to handle CPU burst loads. Use Value: Eliminates need for discrete LDO post-regulation; 95% peak efficiency extends battery life by >20% versus older 85%-efficient converters. | Use Scenario: Converting 5 V USB bus voltage to 3.3 V for ADSL/VDSL PHY and Ethernet MAC ICs in compact modem designs. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) step-down converter enabling small 6.2 µH inductor and 22 µF ceramic caps - reduces board area by 40% vs. 500-kHz alternatives. Use Value: Forced PWM mode (MODE = high) suppresses conducted EMI in shared USB power domain, meeting FCC Class B limits without added filtering. |
| Smartphone Baseband Core Supply | Notebook Subsystem Rail |
Use Scenario: Generating 1.2 V core voltage for baseband DSP from 3.6 V Li-Ion battery, with rapid load transients during voice/data bursts. IC Role / Device Role / Timing Role: Adjustable-output buck converter with fast-response voltage-mode control and input feed-forward - minimizes output deviation during 100 mA → 1.2 A steps. Use Value: Dynamic voltage positioning + 1% typical ripple in PFM mode ensures stable core voltage without requiring >100 µF bulk capacitance. | Use Scenario: Providing 1.5 V I/O rail for PC Card (PCMCIA) slot from 5 V system bus in ultraportable notebooks. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC solution in 10-pin MSOP PowerPad package - fits tight spacing near card edge connector. Use Value: PowerPAD thermal design allows 1.2 A continuous output at 85°C ambient without derating, unlike standard MSOP packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62040DRC | Same electrical specs; uses 3×3 mm QFN package with 48.7°C/W RθJA vs. 60°C/W for DGQ - lower thermal resistance but requires different PCB footprint and reflow profile. | Preferred for higher-power density layouts where thermal performance outweighs assembly complexity; unsuitable for legacy MSOP-only boards. | Select DRC when board space is constrained and thermal vias can be implemented; DGQ remains optimal for cost-sensitive, high-volume consumer designs with established MSOP assembly lines. |
| TPS62130ARGTR | Higher 3-A rating, 2.5–6 V input, 0.6–5.5 V output, 2.5-MHz switching, but larger 16-pin VQFN package and 25 µA IQ - no PowerPAD in same footprint. | Targets next-generation portable systems needing higher current or wider output flexibility; lacks identical pin compatibility or thermal pad geometry. | Choose TPS62130ARGTR only when scaling beyond 1.2 A or requiring programmable soft-start; not a drop-in replacement due to pin count, package size, and control interface differences. |
Compared with TPS62040DGQ, the TPS62040DRC offers superior thermal performance in a smaller footprint but demands QFN-specific layout and assembly, while the TPS62130ARGTR provides higher current and frequency at the cost of compatibility, size, and quiescent current - making TPS62040DGQ the optimal balance for cost-sensitive, thermally managed 1.2-A portable rails.
Availability
TPS62040DGQ is available at Aetrix Electronics and suitable for PDA power management, USB modem supplies, smartphone baseband cores, notebook I/O rails, and xDSL line-card applications requiring stable component supply across industrial temperature ranges (−40°C to 85°C).
Supply support for TPS62040DGQ 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 for portable and battery-operated systems.
The TPS62040DGQ belongs to TI's TPS6204x family of high-frequency synchronous buck converters, designed specifically for space-constrained, battery-powered portable electronics requiring high efficiency across wide load ranges and robust thermal performance in compact packages.
FAQ
What is the recommended input and output capacitor configuration for TPS62040DGQ?
The TPS62040DGQ requires minimum 22 µF ceramic input and output capacitors (e.g., Taiyo Yuden JMK316BJ226ML, 1206 case). These values ensure stable operation, low ripple (<1% in PFM mode), and minimal transient deviation. Larger input capacitance improves noise immunity; output capacitance beyond 22 µF reduces ripple further but does not affect regulation accuracy. The TPS62040DGQ's fast voltage-mode control tolerates low-ESR ceramics without compensation networks.
How does the MODE pin affect TPS62040DGQ operation in real-world applications?
When MODE = low, the TPS62040DGQ automatically switches between 1.25 MHz PWM (moderate-to-heavy loads) and ~625 kHz PFM (light loads) to maximize efficiency. When MODE = high, it forces fixed-frequency PWM regardless of load - essential for EMI-sensitive applications like RF transceivers or audio codecs where variable switching frequency causes interference. The TPS62040DGQ supports dynamic MODE pin toggling during operation for adaptive power management.
Can TPS62040DGQ operate with a 2.5 V input and 1.8 V output at full 1.2 A load?
Yes - the TPS62040DGQ supports 2.5 V to 6.0 V input and delivers 1.2 A continuously at 1.8 V output. At 2.5 V input, P-channel RDS(on) rises to 145–270 mΩ, reducing peak efficiency to ~88%, but thermal design with PowerPAD and adequate PCB copper ensures safe operation. Efficiency improves significantly at higher inputs (e.g., 92% at 3.6 V → 1.8 V/1.2 A).
What is the purpose of dynamic voltage positioning in TPS62040DGQ, and how does it benefit system design?
Dynamic voltage positioning maintains the TPS62040DGQ output ~0.8% above nominal voltage at light loads, creating margin for voltage drop during sudden load increases (e.g., CPU burst). This allows designers to use only 22 µF output capacitance while meeting transient response specs - reducing BOM cost, board area, and ESL-related ringing. It is intrinsic to the TPS62040DGQ's power-save mode comparator thresholds and requires no external components.
How is thermal performance managed in the TPS62040DGQ's MSOP PowerPad package?
The TPS62040DGQ's 10-pin MSOP PowerPad package relies on soldering the exposed thermal pad directly to a PCB ground plane with ≥4 thermal vias (0.3 mm diameter) to inner ground layers. This achieves RθJA = 60°C/W, allowing 1.2 A continuous output at 85°C ambient. Without proper PowerPAD connection, thermal resistance degrades sharply, risking thermal shutdown. TI recommends following SLMA002 layout guidelines for optimal heat dissipation.
TPS62040DGQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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):
- 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-HVSSOP
TPS62040DGQ FAQ
1.How can I place an order for TPS62040DGQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62040DGQ 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 TPS62040DGQ reliable?
The price and inventory of TPS62040DGQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62040DGQ is usually 5 days.
3.What payment methods are accepted for TPS62040DGQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62040DGQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62040DGQ?
TPS62040DGQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62040DGQ 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 TPS62040DGQ?
For technical support, including TPS62040DGQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62040DGQ requirements.
6.How does Aetrix verify that TPS62040DGQ is sourced from the original manufacturer or authorized distributors?
All TPS62040DGQ 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 TPS62040DGQ meets industry standards.
7.What is the process for return or replacement of TPS62040DGQ?
All TPS62040DGQ units undergo pre-shipment inspection (PSI). If there is an issue with TPS62040DGQ, 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 TPS62040DGQ part is unused and in its original packaging.
Return procedure for TPS62040DGQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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