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Texas Instruments TPS62046DGQR
- Part No.:
- TPS62046DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62046DGQR.pdf
- Description:
- IC REG BUCK 3.3V 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,387
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Product details
Overview
TPS62046DGQR from Texas Instruments is a fixed-output 3.3 V, 1.2 A synchronous step-down DC-DC converter in a 10-pin MSOP PowerPad™ package, operating at 1.25 MHz with up to 95% efficiency, 18 µA quiescent current, and power-save mode for battery-powered portable systems.
For engineers reviewing the TPS62046DGQR datasheet, TPS62046DGQR pinout, TPS62046DGQR application, or TPS62046DGQR equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed thermal and switching behavior, and real-world design context for Li-ion–powered PDAs, smart phones, and embedded processors requiring stable 3.3 V rail generation.
Technical Context
The TPS62046DGQR implements a voltage-mode synchronous buck topology with input voltage feed-forward control, enabling fast line/load transient response and stable operation with only 22 µF ceramic output capacitance. Its dual-MOSFET power stage integrates a P-channel high-side switch (115 mΩ typical at 3.6 V) and N-channel synchronous rectifier (85 mΩ typical).
It operates in fixed-frequency PWM mode above ~100 mA load and transitions automatically to pulse-frequency modulation (PFM) power-save mode below that threshold-maintaining >85% efficiency down to 1 mA while delivering dynamic voltage positioning with ±0.8% output offset at light loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±3% over 0–1.2 A load and 3.6–6.0 V input; supports direct connection to DSP/USB PHY rails without external feedback. |
| Switching Frequency | 1.25 MHz nominal (1–1.5 MHz range); enables compact 6.2 µH inductor and minimal EMI filtering for xDSL and portable RF-sensitive designs. |
| Efficiency | Up to 95% at 600 mA/3.6 V input; >85% sustained from 1 mA to full load via automatic PWM/PFM mode transition. |
| Quiescent Current | 18 µA typical in active operation; 0.1 µA in shutdown-critical for multi-day battery life in always-on subsystems. |
| Thermal Protection | Thermal shutdown at 150°C junction temperature; PowerPad-enabled MSOP package achieves 60°C/W θJA with proper PCB copper and vias. |
| Protection Features | Integrated short-circuit protection (50% current limit reduction), undervoltage lockout (2.3 V threshold), and 100% duty-cycle low-dropout mode for extended battery runtime. |
Pinout & Package
TPS62046DGQR 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 ≥4 thermal vias for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; <0.4 V disables device (0.1 µA shutdown current); must not float-requires pull-up or MCU GPIO drive. |
| 2,3 - VIN | Power input | Dual-input pins reduce trace resistance and IR drop; accepts 3.6–6.0 V (absolute max 7 V); requires 22 µF low-ESR ceramic input cap nearby. |
| 4 - GND | Analog ground | Reference for FB and MODE; separate from PGND to minimize noise coupling into feedback loop. |
| 5 - FB | Feedback input | Internally tied to 3.3 V divider; no external resistors needed-simplifies layout and eliminates feedback error sources. |
| 6 - MODE | Operating mode select | Pull low for auto PWM/PFM; pull high for forced PWM-only (fixed 1.25 MHz)-used in noise-critical audio/RF sections. |
| 7,8 - SW | Switch node | High dv/dt node connecting internal MOSFETs to external inductor; must be minimized in area and length to reduce EMI. |
| 9,10 - PGND | Power ground | High-current return path for both MOSFETs; connects directly to PowerPAD and must tie to solid ground plane under IC. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal (3.326 V) at light load, providing headroom to absorb 1.2 A transient drops without undershoot-enables use of only 22 µF output cap. |
| Synchronous Rectification | Integrated N-channel MOSFET replaces Schottky diode, eliminating forward voltage loss and boosting efficiency by 5–8% vs. asynchronous designs at 1 A. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN = VOUT + IOUT×rDS(on); extends usable Li-ion range from 4.2 V down to ~3.4 V before dropout. |
| Internal Softstart | Digital softstart limits inrush current by ramping switch current in four steps (ILIM/8 → ILIM/4 → ILIM/2 → full 1.85 A), preventing input rail collapse on weak batteries. |
| Thermal Shutdown Recovery | Hysteresis-based recovery (150°C trip / ~135°C resume) prevents oscillation during sustained overload; PowerPad design ensures reliable heat dissipation. |
Applications
| Smartphone Core Rail | USB-Powered Modem |
|---|---|
Use Scenario: Generating clean 3.3 V supply for baseband processor I/O and USB transceiver in single-cell Li-ion smartphone. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3 V at up to 1.2 A with <1% ripple and sub-100 ns transient response. Use Value: Enables direct Li-ion (3.0–4.2 V) to 3.3 V conversion without intermediate LDO, improving system efficiency by 12% and reducing thermal load. |
Use Scenario: Powering USB 2.0 modem chipset from host 5 V bus with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (1.25 MHz) buck converter operating in forced PWM mode to avoid interference with 480 Mbps USB signaling. Use Value: Eliminates need for external EMI filters due to fixed switching frequency and integrated synchronous rectification. |
| Notebook Subsystem Supply | xDSL Line Card Bias |
Use Scenario: Providing 3.3 V rail for WLAN/BT combo module in ultraportable notebook with aggressive power budget. IC Role / Device Role / Timing Role: Efficiency-optimized DC-DC converter using power-save mode to maintain >90% efficiency from 10 mA to full load. Use Value: Extends battery runtime by 22 minutes per charge cycle versus comparable non-PFM converters under mixed-use workloads. |
Use Scenario: Generating stable 3.3 V bias for ADSL/VDSL line driver amplifiers in carrier-grade DSLAM equipment. IC Role / Device Role / Timing Role: Industrial-grade buck regulator with thermal shutdown and short-circuit protection operating across −40°C to 85°C ambient. Use Value: Ensures uninterrupted service during thermal stress events; PowerPad package sustains 1.2 A continuous load at 70°C ambient with standard 2-layer PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62046DRC | Same electrical specs and pinout, but in 3×3 mm QFN package with lower 48.7°C/W θJA and no exposed pad routing constraints. | Better thermal performance in space-constrained layouts; requires rework for MSOP footprint compatibility. | Select DRC when board area is limited and thermal margin is critical; DGQR preferred for legacy MSOP-compatible designs. |
| TPS62130ARGTR | Higher 3 A rating, 2.5–6 V input, adjustable/fixed 3.3 V option, but 2.5 MHz switching and different pinout (16-pin VQFN). | Supports higher current and tighter regulation (±1%), but incompatible PCB layout and requires new capacitor selection. | Choose ARGTR only when future-proofing for >1.2 A loads or needing tighter output tolerance; not a drop-in replacement. |
Compared with TPS62046DGQR, the DRC offers superior thermal performance in smaller area but demands QFN assembly capability, while the ARGTR provides scalability beyond 1.2 A at the cost of complete redesign-neither is pin-compatible, making DGQR the optimal choice for established MSOP-based 3.3 V/1.2 A implementations.
Availability
TPS62046DGQR is available at Aetrix Electronics and suitable for smartphone core rails, USB-powered modems, and notebook subsystem supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS62046DGQR 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 and embedded processing technologies, with decades of expertise in power management ICs for portable and industrial applications.
The TPS6204x product line was designed specifically for high-efficiency, low-noise DC-DC conversion in single-cell Li-ion and multi-cell NiMH battery systems used in PDAs, smart phones, and embedded computing platforms.
FAQ
What is the output voltage accuracy of the TPS62046DGQR over temperature and load?
The TPS62046DGQR delivers 3.3 V output with ±3% accuracy across −40°C to 85°C ambient temperature and 0–1.2 A load range, as specified in the SLVS463B datasheet under "Fixed output voltage" test conditions for VI = 3.6 V to 6.0 V. This tolerance includes line, load, and temperature effects-no external calibration is required.
Does the TPS62046DGQR require external feedback resistors?
No, the TPS62046DGQR is the fixed 3.3 V version of the TPS6204x family and has internal feedback resistors. Pin 5 (FB) is internally connected to the 3.3 V divider, so no external components are needed-unlike the adjustable TPS62040 which requires R1/R2.
Can the TPS62046DGQR operate from a 3.0 V input source?
No-the TPS62046DGQR is specified for 3.6 V to 6.0 V input only. At 3.0 V input, the device will not start or may drop out of regulation due to insufficient headroom for its 100% duty-cycle mode and internal circuitry. For 3.0 V input, consider TPS62040 with adjustable output or newer alternatives like TPS62130.
How does the MODE pin affect efficiency in the TPS62046DGQR?
When MODE is pulled low, TPS62046DGQR enters automatic power-save mode-switching to PFM at light loads (<100 mA) to maintain >85% efficiency down to 1 mA. When MODE is pulled high, it forces fixed 1.25 MHz PWM operation, increasing light-load quiescent current to ~7 µA and reducing efficiency by 10–15% at 10 mA but eliminating frequency variation for EMI control.
What is the maximum recommended PCB copper area for the PowerPAD of the TPS62046DGQR?
Texas Instruments recommends connecting the PowerPAD of the TPS62046DGQR to a minimum 100 mm² (e.g., 10 mm × 10 mm) solid copper ground plane on the PCB's inner or bottom layer, with at least four 0.3 mm diameter thermal vias spaced evenly under the pad-this achieves the rated 60°C/W θJA and prevents thermal shutdown at full 1.2 A load in 70°C ambient.
TPS62046DGQR 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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
TPS62046DGQR FAQ
1.How can I place an order for TPS62046DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62046DGQR 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 TPS62046DGQR reliable?
The price and inventory of TPS62046DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62046DGQR is usually 5 days.
3.What payment methods are accepted for TPS62046DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62046DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62046DGQR?
TPS62046DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62046DGQR 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 TPS62046DGQR?
For technical support, including TPS62046DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62046DGQR requirements.
6.How does Aetrix verify that TPS62046DGQR is sourced from the original manufacturer or authorized distributors?
All TPS62046DGQR 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 TPS62046DGQR meets industry standards.
7.What is the process for return or replacement of TPS62046DGQR?
All TPS62046DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62046DGQR, 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 TPS62046DGQR part is unused and in its original packaging.
Return procedure for TPS62046DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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