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Texas Instruments TPS62040DGQR
- Part No.:
- TPS62040DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62040DGQR.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,952
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Product details
Overview
TPS62040DGQR 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 TPS62040DGQR datasheet, TPS62040DGQR pinout, TPS62040DGQR application, or TPS62040DGQR equivalent, key selection criteria include its adjustable feedback architecture (0.5 V reference), Power Save Mode for light-load efficiency, 100% duty cycle low-dropout operation, thermal shutdown, and short-circuit protection - all in a thermally enhanced 10-pin MSOP PowerPad™ package.
Technical Context
The TPS62040DGQR implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling fast line/load transient response and stable regulation with small ceramic capacitors (22 µF input/output). Its dual-mode operation - fixed-frequency PWM at medium-to-heavy loads and pulse-frequency modulation (PFM) in Power Save Mode at light loads - maintains high efficiency across the full 0–1.2 A load range.
Internal circuitry includes a 0.5 V precision reference, soft-start with stepped current limiting, undervoltage lockout (1.5–2.3 V threshold), and integrated P-channel (115 mΩ typ @ 3.6 V) and N-channel (85 mΩ typ @ 3.6 V) MOSFETs. The MODE pin enables forced-PWM operation for noise-sensitive applications, while EN provides 0.1 µA shutdown current.
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) or 3-cell NiMH (3.6 V nominal) battery inputs without external regulators. |
| Output Voltage Range | 0.7 V to VIN - adjustable via external resistor divider; enables precise core voltage scaling for DSPs, CPUs, and low-voltage logic. |
| Max Output Current | 1.2 A - sufficient for powering baseband processors, RF ICs, or multiple peripheral rails in portable systems. |
| Switching Frequency | 1.25 MHz (typ) - enables compact 6.2 µH inductors and 22 µF ceramic capacitors; reduces EMI in xDSL and audio-sensitive designs. |
| Quiescent Current | 18 µA (typ) - minimizes battery drain during standby in always-on mobile devices. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(on) MOSFETs, critical for thermal management in sealed handheld enclosures. |
| Reference Voltage | 0.5 V (±0%) - high-accuracy internal reference enables ±3% output voltage tolerance over temperature and load. |
Pinout & Package
The TPS62040DGQR is housed in a 10-pin MSOP PowerPad™ package (DGQ), where the exposed thermal pad must be soldered to PCB ground for optimal thermal performance (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Pull high to enable; pull low for 0.1 µA shutdown - prevents battery drain when system is off. |
| 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 | Separate from PGND to isolate sensitive feedback path from high-current switching noise. |
| FB (Pin 5) | Feedback input | Connects to resistor divider; internal 0.5 V reference sets output voltage - enables precise adjustable regulation. |
| MODE (Pin 6) | Operating mode control | Pull low for auto PWM/PFM; pull high for forced PWM - allows trade-off between light-load efficiency and EMI filtering simplicity. |
| SW (Pins 7,8) | Switch node | Drain connection of internal P- and N-channel MOSFETs - requires minimized trace area to reduce EMI and ringing. |
| PGND (Pins 9,10) | Power ground return | High-current return path for inductor and MOSFETs; must connect directly to PowerPad for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal at light load, reducing voltage droop during 0→1.2 A transients - enables use of only 22 µF output capacitance. |
| 100% Duty Cycle Operation | Allows regulation down to VOUT + ILOAD × RDS(on) - extends usable battery life by fully discharging single Li-ion cells to ~2.5 V. |
| Integrated Soft-Start | Digital stepped current limiting (ILIM/8 → ILIM/4 → ILIM/2 → 1.85 A) prevents input voltage sag during startup from weak sources like coin cells or supercaps. |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 50% nominal - prevents thermal runaway during output faults without external circuitry. |
| Thermal Shutdown | Disables both MOSFETs at 150°C junction temperature - protects device and PCB during sustained overload or poor heatsinking. |
Applications
| PDA / Smart Phone Power Management | USB-Powered Modem Regulation |
|---|---|
Use Scenario: Regulating Li-ion battery (2.7–4.2 V) to 1.2 V, 1.8 V, or 3.3 V rails for application processors, memory, and RF front-end in handheld devices. IC Role / Device Role / Timing Role: Primary synchronous buck converter providing dynamically scalable core voltage with fast transient response. Use Value: 95% peak efficiency and 18 µA quiescent current extend battery life; Power Save Mode maintains >85% efficiency at 1 mA load. | Use Scenario: Converting 5 V USB supply to 3.3 V or adjustable 1.8 V for DSL/ADSL line drivers, PHY ICs, and microcontrollers in compact modems. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) step-down regulator enabling small 6.2 µH inductors and eliminating need for bulky electrolytic capacitors. Use Value: Fixed-frequency PWM mode (via MODE pin) simplifies EMI filtering for FCC/CE compliance; 100% duty cycle supports brownout operation down to 3.3 V input. |
| Notebook Subsystem Supply | xDSL Line Card Power |
Use Scenario: Generating 1.5 V or 1.6 V core voltage for low-power DSPs or FPGAs in subnotebooks and embedded controllers. IC Role / Device Role / Timing Role: Adjustable-output DC-DC converter with external resistor feedback, supporting precise voltage margins required by modern digital ICs. Use Value: ±3% output accuracy over temperature and load ensures reliable logic operation; soft-start prevents inrush current from tripping USB port current limits. | Use Scenario: Providing clean, regulated 3.3 V or 5 V supply to analog front-end and data converters in xDSL line cards operating in noisy telecom environments. IC Role / Device Role / Timing Role: Synchronous buck regulator with fast line regulation and low output ripple (<1% in PFM mode) for signal integrity-critical analog circuits. Use Value: Input voltage feed-forward and voltage-mode control deliver <10 µs transient response to load steps - minimizing distortion in high-speed data transmission. |
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 |
|---|---|---|---|
| TPS62040DRCR | Same electrical specs; QFN-10 (3×3 mm) package with 48.7°C/W θJA vs. MSOP's 60°C/W - lower thermal resistance but requires different layout. | Preferred for space-constrained designs needing better thermal performance; not pin-compatible due to different footprint and thermal pad location. | Select DRCR for higher power density or improved thermal margin; DGQR remains optimal for legacy MSOP layouts and cost-sensitive volume production. |
| TPS62130ARGTR | Higher 3-A rating, 2.5–6 V input, 1.2-MHz switching, but fixed 3.3 V or adjustable output; no Power Save Mode - uses forced-PWM only. | Suitable for higher-current applications where light-load efficiency is secondary; lacks dynamic voltage positioning and PFM capability. | Choose ARGTR only when ≥2.5 A output is required; TPS62040DGQR remains superior for battery life-critical 1.2-A portable designs with variable load profiles. |
Compared with TPS62040DRCR, the TPS62040DGQR offers identical regulation and efficiency but trades thermal performance for established MSOP manufacturability. Against TPS62130ARGTR, it prioritizes ultra-low quiescent current and adaptive PFM/PWM operation over raw current capacity - making it the preferred choice for energy-constrained portable systems.
Availability
TPS62040DGQR is available at Aetrix Electronics and suitable for PDA power management, USB modem regulation, and notebook subsystem supply requiring stable component supply across industrial temperature ranges (−40°C to 85°C) and multi-year production cycles.
Supply support for TPS62040DGQR 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 industrial applications.
The TPS6204x product line was designed specifically for battery-powered portable electronics requiring high efficiency across wide load ranges, minimal board space, and robust protection features - targeting PDAs, smart phones, and USB-powered peripherals.
FAQ
What is the function of the MODE pin on the TPS62040DGQR?
The MODE pin on the TPS62040DGQR selects between automatic Power Save Mode (MODE = low) and forced fixed-frequency PWM operation (MODE = high). In Power Save Mode, the device switches to PFM at light loads to maintain high efficiency; in forced PWM, it operates continuously at 1.25 MHz for predictable EMI filtering - a critical distinction for noise-sensitive RF or audio subsystems powered by the TPS62040DGQR.
How does the TPS62040DGQR achieve 100% duty cycle operation?
The TPS62040DGQR achieves 100% duty cycle by holding its internal P-channel MOSFET continuously on when input voltage approaches output voltage, allowing regulation down to VOUT + ILOAD × RDS(on). This feature extends usable battery life in single-cell Li-ion applications, enabling operation down to ~2.5 V input while maintaining output regulation - a capability confirmed in the TPS62040DGQR datasheet's "100% Duty Cycle Low Dropout Operation" section.
What output capacitor value is recommended for the TPS62040DGQR?
The TPS62040DGQR is characterized and optimized for 22 µF ceramic output capacitance, as specified in the Recommended Operating Conditions table and validated in Typical Application Circuits. This value ensures stable regulation, <1% output ripple in Power Save Mode, and minimal voltage droop during 0→1.2 A load transients - leveraging the device's fast voltage-mode control and dynamic voltage positioning features.
Does the TPS62040DGQR include thermal protection?
Yes, the TPS62040DGQR includes integrated thermal shutdown that disables both internal MOSFETs when junction temperature exceeds approximately 150°C. Recovery occurs automatically once the die cools below the hysteresis threshold. This protection is documented in the Absolute Maximum Ratings and Functional Description sections of the TPS62040DGQR datasheet and operates independently of external components.
What is the reference voltage used by the TPS62040DGQR feedback circuit?
The TPS62040DGQR uses an internal 0.5 V precision reference voltage for its feedback comparator, as stated in the Electrical Characteristics table under "Vref Reference voltage". This 0.5 V reference enables accurate output voltage setting via external resistor dividers (VOUT = 0.5 V × (1 + R1/R2)) and contributes to the device's ±3% output voltage tolerance over temperature and load - a key specification verified for the TPS62040DGQR in production testing.
TPS62040DGQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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
- 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
TPS62040DGQR FAQ
1.How can I place an order for TPS62040DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62040DGQR 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 TPS62040DGQR reliable?
The price and inventory of TPS62040DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62040DGQR is usually 5 days.
3.What payment methods are accepted for TPS62040DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62040DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62040DGQR?
TPS62040DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62040DGQR 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 TPS62040DGQR?
For technical support, including TPS62040DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62040DGQR requirements.
6.How does Aetrix verify that TPS62040DGQR is sourced from the original manufacturer or authorized distributors?
All TPS62040DGQR 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 TPS62040DGQR meets industry standards.
7.What is the process for return or replacement of TPS62040DGQR?
All TPS62040DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62040DGQR, 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 TPS62040DGQR part is unused and in its original packaging.
Return procedure for TPS62040DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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