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Texas Instruments TPS62040DGQRG4
- Part No.:
- TPS62040DGQRG4
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62040DGQRG4.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
TPS62040DGQRG4 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 in power-save mode.
For engineers reviewing the TPS62040DGQRG4 datasheet, TPS62040DGQRG4 pinout, TPS62040DGQRG4 application, or TPS62040DGQRG4 equivalent, this device supports dynamic voltage positioning, 100% duty-cycle low-dropout operation, and seamless PWM/PFM mode transition - critical for PDA, smart phone, and DSP power rail design with tight transient response and ultra-low quiescent current (18 µA typical).
Technical Context
The TPS62040DGQRG4 implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling fast line/load regulation using small ceramic capacitors. Its dual-MOSFET topology integrates a 115 mΩ P-channel high-side switch and 85 mΩ N-channel synchronous rectifier, supporting continuous 1.2-A output with internal current limiting (1.5–2.2 A) and thermal shutdown at 150°C.
It features programmable operation via MODE pin: low enables automatic PWM/PFM switching (1.25 MHz PWM at heavy load, ~625 kHz PFM at light load), while high forces fixed-frequency PWM for noise-sensitive applications. The FB pin accepts external resistor dividers for adjustable output, referenced to a precise 0.5-V internal bandgap.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.0 V - supports full discharge range of single Li-Ion (2.7–4.2 V) and 3-cell NiMH (3.6–4.5 V) batteries. |
| Output Current | 1.2 A continuous - sufficient for core rails of DSPs, ARM processors, and USB-powered modems. |
| Switching Frequency | 1.25 MHz (PWM mode) / 625 kHz (PFM mode) - enables compact 6.2-µH inductor and 22-µF ceramic output capacitor. |
| Quiescent Current | 18 µA typical - extends battery life in always-on standby states without sacrificing startup speed. |
| Feedback Reference | 0.5 V ±0% - allows precise output setting down to 0.7 V with external resistive divider (R1+R2 ≤1 MΩ). |
| Efficiency Peak | 95% - achieved at mid-load (e.g., 600 mA @ 1.8 V, VIN=3.6 V), critical for thermal management in sealed handheld enclosures. |
| Duty Cycle Max | 100% - maintains regulation even when VIN drops near VO, maximizing usable battery energy. |
Pinout & Package
TPS62040DGQRG4 uses the 10-pin MSOP PowerPad™ package (DGQ), requiring soldering of the exposed thermal pad to PCB ground for optimal thermal performance (RθJA = 60°C/W). The PowerPad must be connected to GND via thermal vias for reliable 1.2-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Pull high to enable; pull low (≤0.4 V) to enter shutdown (ISD = 0.1 µA typical); must not float. |
| 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 ground reference | Separate from PGND; connects to feedback network and control logic ground plane. |
| FB (Pin 5) | Feedback input | Connects to resistor divider midpoint; senses output voltage relative to 0.5-V internal reference. |
| MODE (Pin 6) | Operation mode select | Pull low for auto PWM/PFM; pull high for forced PWM - enables deterministic EMI filtering. |
| SW (Pins 7,8) | Power switch node | Drain connection of internal P- and N-channel MOSFETs; requires minimal-area layout to reduce EMI. |
| PGND (Pins 9,10) | Power ground return | High-current return path for inductor and MOSFETs; must be tied to PowerPad and kept separate from analog GND. |
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 by >30 mV vs fixed-setpoint regulators. |
| Internal Softstart | Digital ramp limits inrush current in four steps (ILIM/8 → ILIM/4 → ILIM/2 → 1.85 A), preventing input voltage sag on weak battery sources. |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 50% of nominal - prevents thermal runaway during output faults. |
| Thermal Shutdown | Disables both MOSFETs at TJ ≥150°C; resumes operation after junction cools to ~140°C - protects PCB and adjacent components. |
| 100% Duty Cycle Mode | Enables dropout as low as IO × rDS(on) (max 210 mΩ) - extends runtime by utilizing battery voltage down to ~0.7 V above regulated output. |
Applications
| PDA & Smart Phone Core Rail | USB-Powered Modem Power |
|---|---|
Use Scenario: Powering ARM9 or OMAP processor cores in handheld devices with Li-Ion battery input (2.7–4.2 V) and variable load (10 mA–1.2 A). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering adjustable 1.2–1.8 V core voltage with dynamic voltage positioning and softstart. Use Value: 95% peak efficiency and 18 µA quiescent current extend battery life; 1.25-MHz switching allows use of 6.2-µH inductor and 22-µF ceramic caps, reducing board area by >40% vs lower-frequency alternatives. | Use Scenario: Generating stable 3.3-V supply for USB 2.0 modems powered directly from host VBUS (4.75–5.25 V). IC Role / Device Role / Timing Role: Step-down converter operating in forced PWM mode (MODE = high) to suppress switching noise near USB data lines. Use Value: Fixed 1.25-MHz frequency enables simple LC filter design; 100% duty cycle ensures regulation even if VBUS sags to 4.5 V under load, maintaining modem link stability. |
| DSP Audio Subsystem Supply | Notebook Sub-Processor Rail |
Use Scenario: Providing low-noise 1.5-V supply to audio codec or DSP in pocket PC, where load jumps from 5 mA (idle) to 800 mA (playback). IC Role / Device Role / Timing Role: Adjustable-output buck converter using power-save mode for idle efficiency and automatic PWM transition for playback fidelity. Use Value: Dynamic voltage positioning reduces output droop to <15 mV during 5→800 mA step, eliminating need for oversized output capacitance and improving THD+N performance. | Use Scenario: Powering embedded controller (EC) or keyboard controller in notebook platforms with 5-V system rail and 1.8-V logic requirement. IC Role / Device Role / Timing Role: Secondary buck regulator converting 5 V to 1.8 V with tight load regulation (±3%) across temperature and line variations. Use Value: Input voltage feed-forward and fast-response voltage-mode control achieve <50-µs transient recovery, preventing EC reset during sudden USB peripheral insertion events. |
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 | Fixed 1.2-V output; 1.2-A rating; 2.5–6.0 V input; 2.25-MHz switching; smaller 6-pin WSON package. | Lacks adjustable output and MODE pin control; no power-save mode; optimized for space-constrained fixed-voltage rails. | Select when board space is critical and output voltage is fixed at 1.2 V - avoids external resistors but forfeits flexibility. |
| TPS62240DRVR | Adjustable output; 0.6-A rating; 2.0–6.0 V input; 2.25-MHz switching; 6-pin SOT-23 package; 22-µA IQ. | Lower current capability and no thermal shutdown; lacks 100% duty cycle and dynamic voltage positioning features. | Select for ultra-low-power sub-rails (e.g., RTC, sensors) where 600-mA max suffices and thermal protection is managed externally. |
Compared with TPS62040DGQRG4, TPS62060DSGR trades adjustability and advanced power management for smaller footprint and higher frequency, while TPS62240DRVR offers similar adjustability at half the current and reduced protection - making TPS62040DGQRG4 the only choice for 1.2-A, battery-fed, dynamically loaded rails requiring full feature set.
Availability
TPS62040DGQRG4 is available at Aetrix Electronics and suitable for PDA power management, USB modem subsystems, and DSP audio supplies requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS62040DGQRG4 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 - delivering high efficiency across wide load ranges, ultra-low quiescent current, and integrated protection for Li-Ion and multi-cell alkaline/NiMH systems.
FAQ
What is the maximum output current supported by the TPS62040DGQRG4?
The TPS62040DGQRG4 supports a continuous output current of 1.2 A under recommended operating conditions (TA ≤ 85°C, proper thermal layout). Its internal current limit is rated from 1.5 A to 2.2 A depending on input voltage, and thermal shutdown activates at 150°C junction temperature to prevent damage during overload or poor heatsinking. Derating is required above 70°C ambient per the package dissipation rating table.
How does the MODE pin affect operation of the TPS62040DGQRG4?
The MODE pin on the TPS62040DGQRG4 selects between two operating modes: pulling MODE low enables automatic PWM/PFM mode (1.25 MHz PWM at heavy loads, ~625 kHz PFM at light loads), optimizing efficiency across the full 0–1.2-A range; pulling MODE high forces fixed-frequency PWM operation regardless of load, simplifying EMI filtering for noise-sensitive analog circuits. Both modes retain full protection features including thermal shutdown and short-circuit response.
Can the TPS62040DGQRG4 operate with input voltage equal to the desired output voltage?
Yes, the TPS62040DGQRG4 supports 100% duty cycle operation, allowing it to maintain regulation when input voltage approaches the output voltage - critical for maximizing battery utilization. In this mode, the P-channel MOSFET remains continuously on, with dropout determined by IO × rDS(on) (max 210 mΩ at 2.5 V). For example, at 1.2 A and 1.8 V output, regulation holds down to ~2.05 V input, extending usable battery life beyond conventional buck converters.
What are the key layout requirements for stable operation of the TPS62040DGQRG4?
Stable operation of the TPS62040DGQRG4 requires: (1) short, wide traces for VIN, SW, and PGND paths to minimize parasitic inductance; (2) input and output capacitors placed within 3 mm of their respective pins; (3) the PowerPad thermally connected to a solid GND plane with ≥4 thermal vias; (4) FB trace routed away from SW and inductor, shielded by ground pour; and (5) separation of analog GND (Pin 4) and power PGND (Pins 9–10) except at a single point near the PowerPad. These practices ensure low EMI, fast transient response, and thermal reliability.
Does the TPS62040DGQRG4 include built-in protection features?
Yes, the TPS62040DGQRG4 integrates multiple protection features: thermal shutdown triggers at 150°C junction temperature; short-circuit protection reduces switching frequency and current limit to 50% when output voltage falls below 50% of nominal; undervoltage lockout disables operation below ~1.5–2.3 V input; and internal softstart limits inrush current during startup. These features operate independently of external components and remain active in both PWM and PFM modes, ensuring robustness in portable and battery-fed systems.
TPS62040DGQRG4 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:
- 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
TPS62040DGQRG4 FAQ
1.How can I place an order for TPS62040DGQRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62040DGQRG4 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 TPS62040DGQRG4 reliable?
The price and inventory of TPS62040DGQRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62040DGQRG4 is usually 5 days.
3.What payment methods are accepted for TPS62040DGQRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62040DGQRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62040DGQRG4?
TPS62040DGQRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62040DGQRG4 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 TPS62040DGQRG4?
For technical support, including TPS62040DGQRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62040DGQRG4 requirements.
6.How does Aetrix verify that TPS62040DGQRG4 is sourced from the original manufacturer or authorized distributors?
All TPS62040DGQRG4 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 TPS62040DGQRG4 meets industry standards.
7.What is the process for return or replacement of TPS62040DGQRG4?
All TPS62040DGQRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62040DGQRG4, 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 TPS62040DGQRG4 part is unused and in its original packaging.
Return procedure for TPS62040DGQRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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