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Texas Instruments TPS62040DGQG4
- Part No.:
- TPS62040DGQG4
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62040DGQG4.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,438
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Product details
Overview
TPS62040DGQG4 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 at 1.25 MHz fixed frequency, features 18 µA quiescent current, and supports power save mode for high efficiency across light-to-heavy loads - used in PDAs, smart phones, and USB-powered modems.
For engineers reviewing the TPS62040DGQG4 datasheet, TPS62040DGQG4 pinout, TPS62040DGQG4 application, or TPS62040DGQG4 equivalent, key selection criteria include its 2.5–6.0 V input range, 0.7–VIN adjustable output, 10-pin MSOP PowerPad™ package with thermal vias, and dual-mode (PWM/PFM) operation enabled via MODE pin control.
Technical Context
The TPS62040DGQG4 implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling fast line/load transient response and stable operation with small ceramic capacitors (22 µF input/output). Its internal 0.5 V reference and feedback divider interface support precise output regulation across the full 0.7–VIN range.
It integrates P-channel (115 mΩ typical @ 3.6 V) and N-channel (85 mΩ typical @ 3.6 V) MOSFETs, employs digital soft-start with stepped current limiting, and uses dynamic voltage positioning (±0.8%/±1.6% thresholds) to minimize output droop during load transients while maintaining ≤1% ripple in power save mode.
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) without external regulators. |
| 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 (typical), 1 MHz min - enables compact 6.2 µH inductors and minimizes RF interference in xDSL and audio-sensitive designs. |
| Quiescent Current | 18 µA (typical) - extends battery runtime in always-on standby modes of pocket PCs and smart phones. |
| Feedback Reference | 0.5 V internal - allows precise resistor-divider programming of any output ≥0.7 V with minimal divider current impact on efficiency. |
| Efficiency Peak | 95% - achieved at mid-load (e.g., 500 mA @ 3.6 V → 1.8 V), critical for thermal management in sealed handheld enclosures. |
| Thermal Shutdown | 150°C (typical) - protects against sustained overload or poor PCB thermal design; resumes operation after junction cools to ~150°C. |
Pinout & Package
TPS62040DGQG4 is housed in a 10-pin MSOP PowerPad™ package (3.0 mm × 3.0 mm × 1.0 mm) with exposed thermal pad soldered to PCB ground for enhanced heat dissipation (RθJA = 60°C/W with thermal vias).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control: tie to VIN to enable, GND to shut down (0.1 µA ISD); must not float. |
| VIN (Pins 2,3) | Power input | Primary supply connection; accepts 2.5–6.0 V; requires local 22 µF low-ESR ceramic capacitor. |
| GND (Pin 4) | Analog ground | Reference for FB, MODE, EN; separate from PGND but connected externally at single point. |
| FB (Pin 5) | Feedback input | Connects to resistor divider (R1/R2) for adjustable output; internal 0.5 V reference sets VOUT = 0.5×(1+R1/R2). |
| MODE (Pin 6) | Operation mode select | Pull low for automatic PWM/PFM; pull high for forced PWM only - enables noise filtering in sensitive analog sections. |
| SW (Pins 7,8) | Switch node | Drain connection of internal P- and N-MOSFETs; routes to inductor; must be minimized in area to reduce EMI. |
| PGND (Pins 9,10) | Power ground | High-current return path for SW and internal FETs; connects directly to PowerPad thermal pad and system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation down to VIN − VOUT ≈ IOUT × rDS(on), extending usable battery voltage range in Li-Ion applications. |
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal at light load, reducing voltage droop by >30 mV during 100 mA → 1.2 A transients. |
| Internal Soft-Start | Digital ramp limits inrush current to ILIM/8 → ILIM/4 → ILIM/2 → 1.85 A, preventing input rail collapse on weak sources. |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 50% nominal, limiting fault energy during startup or load faults. |
| Thermal Shutdown Recovery | Hysteresis-free restart: device resumes normal operation immediately upon junction temperature falling below 150°C threshold. |
Applications
| PDA / Pocket PC Power Rail | USB-Powered Modem |
|---|---|
Use Scenario: Regulating single Li-Ion battery (2.7–4.2 V) to 1.8 V for ARM9 application processor and SDRAM interface. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.2 A with dynamic voltage positioning to absorb CPU burst currents. Use Value: 95% peak efficiency and 18 µA quiescent current extend active runtime by >25% versus legacy linear regulators. | Use Scenario: Converting 5 V USB bus power to 3.3 V for ADSL line driver IC and Ethernet PHY in compact modem enclosure. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) step-down converter enabling use of 4.7 µH shielded inductor and 22 µF ceramic caps. Use Value: Fixed-frequency PWM mode (via MODE pin) suppresses conducted EMI into adjacent DSL signal paths. |
| Notebook Subsystem Core Supply | xDSL Line Card Bias Supply |
Use Scenario: Generating 1.5 V core voltage for low-power DSP in subnotebook computer, operating from 3-cell NiMH pack (3.6 V nominal). IC Role / Device Role / Timing Role: Adjustable-output buck converter with power save mode maintaining >85% efficiency at 10 mA standby load. Use Value: 10-pin MSOP PowerPad™ package provides thermal performance comparable to larger QFN while fitting tight layout constraints. | Use Scenario: Providing 1.2 A at 1.2 V for analog front-end (AFE) in xDSL line card, powered from intermediate 3.3 V rail. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with 1.25 MHz switching minimizing interference with upstream/downstream DSL bands. Use Value: Fast transient response (<50 µs settling) prevents AFE brownout during line activation bursts. |
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 |
|---|---|---|---|
| TPS62060DSGR | 3-MHz switching frequency, 1-A output, 2.7–6.0 V input, same 10-pin WSON package but no PowerPad; lower quiescent current (15 µA). | Better suited for space-constrained, ultra-low-noise applications where 1.25 MHz EMI is problematic; not recommended for >1-A loads. | Select TPS62060DSGR only if board layout prohibits PowerPad thermal vias and load stays ≤1 A. |
| TPS62130ARGTR | 3-MHz frequency, 3-A output, 3–17 V input, 16-pin VQFN with PowerPad; higher voltage range and current capability. | Designed for industrial and automotive inputs; overkill for portable battery systems but offers superior thermal margin and wider VIN. | Choose TPS62130ARGTR only when scaling to higher input voltages (>6 V) or >1.2 A loads; requires PCB redesign. |
Compared with TPS62040DGQG4, TPS62060DSGR trades 250 mA output capacity and thermal robustness for higher frequency and smaller footprint, while TPS62130ARGTR provides headroom for future voltage/current scaling at the cost of increased size and complexity.
Availability
TPS62040DGQG4 is available at Aetrix Electronics and suitable for PDA power management, USB modem subsystems, and notebook core voltage regulation requiring stable component supply across long production cycles.
Supply support for TPS62040DGQG4 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 thermal packaging - targeting PDAs, smart phones, and xDSL modems.
FAQ
What is the maximum output current supported by the TPS62040DGQG4?
The TPS62040DGQG4 supports up to 1.2 A of continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design with PowerPad soldered and thermal vias). Peak current capability reaches 1.85 A during soft-start, but sustained operation above 1.2 A risks thermal shutdown due to power dissipation limits in the MSOP package.
How does the MODE pin affect TPS62040DGQG4 operation?
The MODE pin on the TPS62040DGQG4 selects between two operating modes: pulling MODE low enables automatic PWM/PFM transition for highest efficiency across load range, while pulling MODE high forces fixed-frequency PWM mode at 1.25 MHz - essential for noise-sensitive analog circuits but reduces light-load efficiency. The pin has CMOS-compatible thresholds (VIH = 1.4 V, VIL = 0.4 V).
Can the TPS62040DGQG4 regulate output voltage when input drops near the output level?
Yes - the TPS62040DGQG4 supports 100% duty cycle operation, allowing regulation even when VIN approaches VOUT. Minimum input voltage is determined by VOUT + IOUT × rDS(on)(max), enabling full utilization of Li-Ion battery discharge down to ~2.7 V for 1.8 V outputs, extending usable battery life.
What is the purpose of the PowerPad in the TPS62040DGQG4 MSOP package?
The exposed PowerPad in the TPS62040DGQG4's MSOP package serves as the primary thermal path to the PCB, reducing junction-to-ambient thermal resistance to 60°C/W (with thermal vias). It must be soldered to a solid ground plane; failure to connect it degrades thermal performance by >40%, risking premature thermal shutdown under 1-A loads.
Does the TPS62040DGQG4 require external compensation components?
No - the TPS62040DGQG4 uses an internally compensated voltage-mode control loop optimized for 22 µF ceramic output capacitors. No external compensation network is needed; stability is guaranteed with recommended input (22 µF) and output (22 µF) ceramic capacitors and a 6.2 µH inductor, simplifying layout and reducing BOM count.
TPS62040DGQG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TPS62040DGQG4 FAQ
1.How can I place an order for TPS62040DGQG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62040DGQG4 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 TPS62040DGQG4 reliable?
The price and inventory of TPS62040DGQG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62040DGQG4 is usually 5 days.
3.What payment methods are accepted for TPS62040DGQG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62040DGQG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62040DGQG4?
TPS62040DGQG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62040DGQG4 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 TPS62040DGQG4?
For technical support, including TPS62040DGQG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62040DGQG4 requirements.
6.How does Aetrix verify that TPS62040DGQG4 is sourced from the original manufacturer or authorized distributors?
All TPS62040DGQG4 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 TPS62040DGQG4 meets industry standards.
7.What is the process for return or replacement of TPS62040DGQG4?
All TPS62040DGQG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62040DGQG4, 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 TPS62040DGQG4 part is unused and in its original packaging.
Return procedure for TPS62040DGQG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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