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Texas Instruments TPS62046DGQ
- Part No.:
- TPS62046DGQ
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62046DGQ.pdf
- Description:
- IC REG BUCK 3.3V 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
TPS62046DGQ 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 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 processors in portable electronics.
For engineers reviewing the TPS62046DGQ datasheet, TPS62046DGQ pinout, TPS62046DGQ application, or TPS62046DGQ equivalent, key selection considerations include its fixed 3.3 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 TPS62046DGQ implements a voltage-mode synchronous buck architecture with input voltage feed-forward control, enabling fast line/load transient response and stable regulation using only 22 µF ceramic input/output capacitors. Its dual-MOSFET switch stage features P-channel (115 mΩ typ. @ 3.6 V) and N-channel (85 mΩ typ. @ 3.6 V) power FETs integrated on-die.
Operation dynamically shifts between fixed-frequency PWM (1.25 MHz) at medium-to-heavy loads and pulse-frequency modulation (PFM) in Power Save Mode at light loads, with dynamic voltage positioning (±0.8% to ±1.6% nominal output offset) to minimize transient droop. The MODE pin enables forced-PWM mode for noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V (±3% over 0–1.2 A load, VI = 3.6–6.0 V) |
| Max output current | 1.2 A continuous - supports CPU/DSP core rails in portable systems |
| Switching frequency | 1.25 MHz (PWM mode); 625 kHz (Power Save Mode) - enables compact 6.2 µH inductor |
| Input voltage range | 2.5 V to 6.0 V - compatible with single Li-ion (2.7–4.2 V) and 3×NiMH (3.6 V nominal) |
| Quiescent current | 18 µA typ. - extends battery life in standby without compromising startup speed |
| Efficiency peak | 95% - achieved at ~500 mA load with VI = 3.6 V, VO = 3.3 V, minimizing thermal stress |
| Duty cycle limit | 100% - maintains regulation down to VI ≈ VO + IO × rDS(on), extending usable battery range |
Pinout & Package
TPS62046DGQ uses a thermally enhanced 10-pin MSOP PowerPad™ package (3.0 mm × 4.9 mm, 0.5 mm pitch) with exposed thermal pad soldered to PCB ground for RθJA = 60°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic: tie to VIN to enable; pull to GND for <1 µA shutdown current |
| VIN (Pins 2,3) | Power input | Accepts 2.5–6.0 V; dual pins reduce trace resistance and improve thermal path |
| GND (Pin 4) | Analog ground | Reference for FB and internal bias; separate from PGND to minimize noise coupling |
| FB (Pin 5) | Feedback input | Internally connected to 3.3 V divider - no external resistors 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 kHz or 1.25 MHz) |
| SW (Pins 7,8) | Switch node | Drain connection of internal P- and N-channel MOSFETs; requires minimal copper area to reduce EMI |
| PGND (Pins 9,10) | Power ground | High-current return path for SW and internal FETs; must be tied to PowerPad for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Power Save Mode | Automatic transition to PFM at light loads preserves >85% efficiency down to 1 mA, reducing system idle power |
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal at light load, providing headroom to absorb 1.2 A transients with ≤30 mV droop |
| 100% Duty Cycle Operation | Enables regulation when VIN drops to within ~150 mV of VO, maximizing battery utilization in Li-ion discharge tail |
| Integrated Softstart | Digital ramp limits inrush current during startup, preventing input rail collapse on weak sources like coin cells or USB ports |
| Thermal & Short-Circuit Protection | Shuts down at 150°C junction temp; reduces switching frequency and current limit to 50% under short-circuit conditions |
Applications
| PDA / Smart Phone Core Power | USB-Powered Modem Rail |
|---|---|
Use Scenario: Powering ARM-based application processors and baseband ICs in handheld devices with single Li-ion battery input. IC Role / Device Role / Timing Role: Primary 3.3 V system rail regulator delivering up to 1.2 A with fast transient response to CPU burst loads. Use Value: 95% efficiency and 18 µA quiescent current extend talk time by >12% versus legacy buck converters in 3G/4G handsets. | Use Scenario: Generating stable 3.3 V from 5 V USB host port for embedded DSL/cable modems and VoIP adapters. IC Role / Device Role / Timing Role: Step-down regulator handling variable USB source impedance and load steps up to 1 A. Use Value: 100% duty cycle operation ensures regulation even as USB voltage sags to 4.4 V under heavy load, avoiding brownouts. |
| Notebook Subsystem Supply | xDSL Line Card Bias |
Use Scenario: Supplying I/O interfaces, touch controllers, and display drivers in ultraportable notebooks with 3-cell NiMH batteries. IC Role / Device Role / Timing Role: Secondary 3.3 V rail supporting peripheral logic with tight voltage tolerance and low noise. Use Value: Fixed 3.3 V output eliminates external feedback resistors, reducing BOM count and layout area by 30% vs adjustable variants. | Use Scenario: Providing clean 3.3 V bias to ADSL/VDSL line driver amplifiers where RF interference must be minimized. IC Role / Device Role / Timing Role: Low-EMI power stage operating in forced-PWM mode (MODE = high) at 1.25 MHz for predictable spectral content. Use Value: 1.25 MHz fixed frequency simplifies EMI filter design and avoids interference with DSL upstream bands (25–138 kHz). |
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; QFN-10 (3×3 mm) package with lower RθJA (48.7°C/W) and different pinout | Better thermal performance in space-constrained layouts; requires rework of PCB footprint and thermal via pattern | Select DRC for higher ambient temperature operation (>70°C) or tighter board area constraints |
| TPS62130ARGTR | Higher 3-A rating, 2.5–6 V input, adjustable/fixed 3.3 V option, 2.5 MHz switching, but 22 µA IQ and no Power Save Mode | Supports higher current loads and faster transient response; lacks light-load efficiency optimization | Choose ARGTR when >1.2 A peak current or smaller inductor size (e.g., 2.2 µH) is required, accepting higher light-load IQ |
Compared with TPS62046DGQ, TPS62046DRC offers superior thermal dissipation in a smaller footprint but demands layout revision, while TPS62130ARGTR trades light-load efficiency for higher current capability and frequency - making TPS62046DGQ optimal for battery-life-critical 1.2 A portable rails.
Availability
TPS62046DGQ is available at Aetrix Electronics and suitable for PDA power management, USB modem subsystems, and notebook I/O rail applications requiring stable component supply across industrial temperature ranges (−40°C to 85°C).
Supply support for TPS62046DGQ 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, emphasizing ultra-low quiescent current, small solution size, and seamless transition between PWM and PFM modes to maximize runtime.
FAQ
What is the output voltage accuracy of the TPS62046DGQ over temperature and load?
The TPS62046DGQ delivers a fixed 3.3 V output with ±3% accuracy across the full operating range: input voltage 3.6 V to 6.0 V, load current 0–1.2 A, and ambient temperature −40°C to 85°C. This specification is guaranteed by internal reference voltage (0.5 V ±1%) and precision feedback network trimming, ensuring reliable regulation for 3.3 V logic interfaces without external calibration.
Does the TPS62046DGQ require external feedback resistors?
No, the TPS62046DGQ does not require external feedback resistors. As a fixed-output variant, its internal resistor divider is factory-trimmed to set 3.3 V at the FB pin; the FB pin is internally connected and must be left unconnected externally. This eliminates resistor tolerance errors and saves PCB area versus adjustable versions like TPS62040.
How does the Power Save Mode in the TPS62046DGQ improve battery life?
The TPS62046DGQ enters Power Save Mode automatically below ~100 mA load, reducing switching frequency to ~625 kHz and lowering quiescent current to 18 µA. This maintains >85% efficiency at 1 mA load - a 5× improvement over forced-PWM operation - directly extending standby time in portable devices powered by single Li-ion cells.
What thermal design guidance applies to the TPS62046DGQ MSOP PowerPad package?
The TPS62046DGQ DGQ package requires the exposed PowerPad to be soldered to a solid PCB ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner/ground layers. Without this, RθJA degrades from 60°C/W to >100°C/W, risking thermal shutdown at >800 mA in still air. TI recommends following SLMA002 layout guidelines for optimal heat dissipation.
Can the TPS62046DGQ operate with input voltage below 2.5 V?
No, the TPS62046DGQ has a minimum recommended input voltage of 2.5 V per datasheet specifications. Below this, undervoltage lockout (UVLO) activates at ~2.3 V (typ.), disabling switching. While 100% duty cycle operation allows regulation near VO, the device will not start or sustain regulation if VIN falls below the UVLO threshold - critical for end-of-discharge Li-ion monitoring.
TPS62046DGQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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
TPS62046DGQ FAQ
1.How can I place an order for TPS62046DGQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62046DGQ 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 TPS62046DGQ reliable?
The price and inventory of TPS62046DGQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62046DGQ is usually 5 days.
3.What payment methods are accepted for TPS62046DGQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62046DGQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62046DGQ?
TPS62046DGQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62046DGQ 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 TPS62046DGQ?
For technical support, including TPS62046DGQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62046DGQ requirements.
6.How does Aetrix verify that TPS62046DGQ is sourced from the original manufacturer or authorized distributors?
All TPS62046DGQ 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 TPS62046DGQ meets industry standards.
7.What is the process for return or replacement of TPS62046DGQ?
All TPS62046DGQ units undergo pre-shipment inspection (PSI). If there is an issue with TPS62046DGQ, 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 TPS62046DGQ part is unused and in its original packaging.
Return procedure for TPS62046DGQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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