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Texas Instruments TPS62042DGQ
- Part No.:
- TPS62042DGQ
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62042DGQ.pdf
- Description:
- IC REG BUCK 1.5V 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
TPS62042DGQ from Texas Instruments is a fixed-output 1.5 V, 1.2 A synchronous step-down DC-DC converter in a 10-pin MSOP PowerPad™ package, operating at 1.25 MHz with 95% peak efficiency and 18 µA quiescent current. It supports single-cell Li-Ion or 3-cell NiMH/NiCd battery inputs (2.5 V–6.0 V) and delivers regulated power to low-voltage DSPs and processors in portable electronics.
For engineers reviewing the TPS62042DGQ datasheet, TPS62042DGQ pinout, TPS62042DGQ application, or TPS62042DGQ equivalent, key selection criteria include its fixed 1.5 V output, Power Save Mode for light-load efficiency, 100% duty cycle dropout operation, thermal shutdown, and short-circuit protection - all validated for battery-powered PDA, smart phone, and notebook subsystems.
Technical Context
The TPS62042DGQ implements a voltage-mode synchronous buck controller with input voltage feed-forward, enabling fast line/load regulation and compatibility with small ceramic capacitors (22 µF input/output). Its dual-mode operation-PWM at medium-to-heavy loads and 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 reference, undervoltage lockout (1.5–2.3 V), enable-controlled shutdown (0.1 µA), and MODE pin-selectable forced PWM mode. The integrated P-channel (115–210 mΩ) and N-channel (85–200 mΩ) MOSFETs support 100% duty cycle operation and dynamic voltage positioning for transient response headroom.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±3% over 0–1.2 A load and −40°C to 85°C ambient |
| Max Output Current | 1.2 A continuous; internal current limit set to 1.5–2.2 A |
| Switching Frequency | 1.25 MHz nominal (1–1.5 MHz range); drops to 625 kHz in Power Save Mode |
| 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) |
| Quiescent Current | 18 µA typical in active operation; 0.1 µA in shutdown |
| Efficiency Peak | 95% at 600 mA, VO = 1.5 V, VI = 3.6 V, MODE = Low |
| Thermal Shutdown | Activates at ~150°C junction temperature; resumes operation after cooldown |
Pinout & Package
TPS62042DGQ uses 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 thermal dissipation (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Pull high to VIN to activate; pull low to GND for 0.1 µA shutdown - must not float |
| VIN (Pins 2,3) | Main power input | Accepts 2.5–6.0 V; dual pins reduce IR drop and improve thermal path |
| GND (Pin 4) | Analog ground reference | Separate from PGND; connects to feedback network and control logic ground |
| FB (Pin 5) | Feedback sense | Internally tied to 1.5 V output - no external divider required for fixed-output version |
| MODE (Pin 6) | Operating mode select | Pull low for auto PWM/PFM; pull high for forced fixed-frequency PWM (625–1.25 MHz) |
| SW (Pins 7,8) | Power switch node | Connects to external inductor; dual pins reduce switching losses and EMI |
| PGND (Pins 9,10) | Power ground return | High-current return path for MOSFETs; must be connected to PowerPad ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Power Save Mode | Automatically switches between PWM and PFM to sustain >85% efficiency down to 1 mA load |
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal at light load, reducing voltage droop during 0→1.2 A transients |
| 100% Duty Cycle Operation | Enables regulation down to VI ≈ VO + IO×rDS(on), extending battery runtime in low-VIN conditions |
| Integrated Softstart | Digital softstart limits inrush current using stepped current limits (ILIM/8 → ILIM), preventing input rail collapse |
| Robust Protection | Includes thermal shutdown, short-circuit foldback (50% frequency/current reduction), and UVLO (1.5–2.3 V) |
Applications
| PDA & Smart Phone Core Supply | USB-Powered Modem Regulation |
|---|---|
Use Scenario: Powers ARM-based application processors and baseband ICs in handheld devices with single-cell Li-Ion input. IC Role / Device Role / Timing Role: Primary 1.5 V core regulator delivering up to 1.2 A with tight transient response and low-noise PFM/PWM switching. Use Value: Enables >95% efficiency at 600 mA and 18 µA quiescent current, extending talk time and standby duration. | Use Scenario: Converts 5 V USB supply to stable 1.5 V for PHY and MAC layers in embedded broadband modems. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) buck converter minimizing EMI near sensitive RF sections while supporting dynamic load steps. Use Value: Fixed 1.5 V output eliminates external resistor network; Power Save Mode reduces idle power by >5× vs. standard PWM. |
| Notebook Subsystem Rail | xDSL Line Card Bias Supply |
Use Scenario: Supplies 1.5 V to DDR memory termination or GPU auxiliary logic in ultra-thin notebooks. IC Role / Device Role / Timing Role: Compact 3 mm × 3 mm MSOP PowerPad solution with thermal vias for high-power-density board layouts. Use Value: 100% duty cycle operation maintains regulation down to 1.6 V input, maximizing usable battery voltage range. | Use Scenario: Generates clean 1.5 V bias for analog front-end (AFE) and line driver ICs in ADSL/VDSL CPE equipment. IC Role / Device Role / Timing Role: Synchronous buck regulator with forced PWM mode (via MODE pin) to avoid interference with DSL signal bands. Use Value: 625 kHz PFM fallback and 1.25 MHz PWM operation allow flexible noise management without sacrificing light-load efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62043DGQ | Fixed 1.6 V output; identical package, pinout, and electrical specs except VOUT | Used where system requires 1.6 V core rail instead of 1.5 V - no layout change needed | Select when target SoC or FPGA core voltage is specified at 1.6 V |
| TPS62044DGQ | Fixed 1.8 V output; same MSOP PowerPad package, 1.25 MHz switching, and protection features | Preferred for 1.8 V I/O or peripheral rails; higher output reduces conduction loss in downstream LDOs | Choose for systems requiring 1.8 V logic supply with identical thermal and footprint constraints |
Compared with TPS62042DGQ, TPS62043DGQ and TPS62044DGQ share identical thermal performance, pinout, and control architecture - differing only in factory-trimmed output voltage - making them direct functional alternatives for 1.6 V and 1.8 V applications respectively, without PCB redesign.
Availability
TPS62042DGQ is available at Aetrix Electronics and suitable for PDA power management, USB modem regulation, and notebook subsystem supply requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62042DGQ 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 solutions, 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, small solution size, and robust protection in thermally enhanced MSOP and QFN packages.
FAQ
What is the output voltage tolerance of the TPS62042DGQ under full load and temperature range?
The TPS62042DGQ provides a fixed 1.5 V output with ±3% tolerance across the full 0–1.2 A load range and −40°C to +85°C ambient temperature, as verified in the Electrical Characteristics table under "Fixed output voltage" with VI = 2.5 V to 6.0 V and IO = 0 mA to 1.2 A. This accuracy is maintained via internal trimming and does not require external components.
Does the TPS62042DGQ require external feedback resistors to set its output voltage?
No, the TPS62042DGQ does not require external feedback resistors. As a fixed-output variant, its 1.5 V regulation is achieved using an internal resistor divider connected to the FB pin. Unlike the adjustable TPS62040, the FB pin is internally tied to the output and must not be externally loaded - simplifying design and reducing BOM count.
How does the MODE pin affect the operation of the TPS62042DGQ?
The MODE pin on the TPS62042DGQ selects between two operating modes: pulling MODE low enables automatic PWM/PFM transition for optimal light-load efficiency, while pulling MODE high forces continuous fixed-frequency PWM operation at 1.25 MHz (or 625 kHz under short-circuit). This allows system-level noise control without sacrificing heavy-load performance.
What thermal performance can be expected from the TPS62042DGQ in its MSOP PowerPad package?
In the DGQ package, the TPS62042DGQ achieves RθJA = 60°C/W when the PowerPad is soldered to a 4-layer PCB with thermal vias. At 1.2 A output and 3.6 V input, typical power dissipation is ~350 mW, resulting in ~21°C junction-to-ambient rise - well within the −40°C to +125°C operating junction range. Thermal shutdown activates at ~150°C as a safety limit.
Can the TPS62042DGQ operate with input voltages below 2.5 V?
No, the TPS62042DGQ has a minimum recommended input voltage of 2.5 V per the Recommended Operating Conditions table. Its undervoltage lockout (UVLO) disables switching below ~1.5–2.3 V, and operation below 2.5 V risks violating absolute maximum ratings or causing unstable regulation. For sub-2.5 V inputs, consider TI's TPS621xx or TPS628xx families.
TPS62042DGQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- 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
TPS62042DGQ FAQ
1.How can I place an order for TPS62042DGQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62042DGQ 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 TPS62042DGQ reliable?
The price and inventory of TPS62042DGQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62042DGQ is usually 5 days.
3.What payment methods are accepted for TPS62042DGQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62042DGQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62042DGQ?
TPS62042DGQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62042DGQ 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 TPS62042DGQ?
For technical support, including TPS62042DGQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62042DGQ requirements.
6.How does Aetrix verify that TPS62042DGQ is sourced from the original manufacturer or authorized distributors?
All TPS62042DGQ 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 TPS62042DGQ meets industry standards.
7.What is the process for return or replacement of TPS62042DGQ?
All TPS62042DGQ units undergo pre-shipment inspection (PSI). If there is an issue with TPS62042DGQ, 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 TPS62042DGQ part is unused and in its original packaging.
Return procedure for TPS62042DGQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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