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Texas Instruments TPS62046DRCR
- Part No.:
- TPS62046DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62046DRCR.pdf
- Description:
- IC REG BUCK 3.3V 1.2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:6,115
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Product details
Overview
TPS62046DRCR from Texas Instruments is a fixed-output 3.3 V, 1.2 A synchronous step-down DC-DC converter in a 10-pin QFN 3×3 mm PowerPAD™ package, operating at 1.25 MHz with 95% peak efficiency and 18 µA quiescent current-designed for Li-ion–powered portable systems requiring stable low-noise 3.3 V rail generation.
For engineers reviewing the TPS62046DRCR datasheet, TPS62046DRCR pinout, TPS62046DRCR application, or TPS62046DRCR equivalent, key selection considerations include its fixed 3.3 V output, 2.5–6.0 V input range, power-save mode operation down to 18 µA IQ, thermal shutdown at 150°C, and compatibility with 22 µF ceramic input/output capacitors and 6.2 µH inductors.
Technical Context
The TPS62046DRCR implements a voltage-mode synchronous buck architecture with input voltage feed-forward, enabling fast line/load transient response and stable regulation using small ceramic capacitors. Its dual-MOSFET (P-channel high-side + N-channel synchronous rectifier) topology eliminates external diode losses and supports 100% duty-cycle operation for ultra-low dropout.
Control logic integrates automatic PWM/PFM mode switching via the MODE pin: grounded for light-load power-save mode (625 kHz PFM), pulled high for forced fixed-frequency PWM (1.25 MHz). Feedback uses an internal 0.5 V reference; the fixed 3.3 V output version bypasses external resistor divider requirements by connecting FB directly to VO.
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 - enables direct replacement of linear regulators without feedback tuning. |
| Max Output Current | 1.2 A continuous - supports core logic rails for DSPs, USB peripherals, and subnotebook I/O interfaces. |
| Switching Frequency | 1.25 MHz (PWM mode); 625 kHz (PFM mode) - allows compact 3×3 mm layout with ≤6.2 µH inductor and avoids AM radio band interference. |
| Quiescent Current | 18 µA typical in power-save mode - extends battery runtime in always-on portable devices like smart phones and PDAs. |
| Input Voltage Range | 2.5 V to 6.0 V - accommodates single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd (3.6 V nominal), and USB 5 V inputs. |
| Efficiency Peak | 95% at 600 mA, VIN = 3.6 V, VOUT = 3.3 V - reduces thermal load and enables fanless operation in space-constrained enclosures. |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload or poor PCB thermal design without external circuitry. |
Pinout & Package
TPS62046DRCR uses a thermally enhanced 10-pin QFN 3×3 mm package with exposed PowerPAD™ (pin 11, connected to PGND) for low RθJA = 48.7°C/W. The PowerPAD must be soldered to a dedicated PCB ground plane with ≥4 thermal vias for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable input | Active-high digital control: tie to VIN for always-on operation; pull to GND for <0.1 µA shutdown current. |
| 2,3 VIN | Power input | Dual input pins reduce trace resistance and inductance - critical for high di/dt switching stability. |
| 4 GND | Analog ground | Reference for FB and internal bias circuits - must be star-connected to PGND near PowerPAD to minimize noise coupling. |
| 5 FB | Feedback input | Internally tied to 3.3 V output - no external resistors required; decoupling capacitor recommended near pin. |
| 6 MODE | Mode select | GND = auto PWM/PFM; VIN = forced PWM - enables deterministic EMI filtering in noise-sensitive applications. |
| 7,8 SW | Switch node | Drain connection of internal P-channel and N-channel MOSFETs - requires minimal copper area to limit EMI and ringing. |
| 9,10 PGND | Power ground | High-current return path for inductor and MOSFETs - must connect directly to PowerPAD and input/output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal during light load, reducing voltage droop by ~15 mV during 100 mA → 1.2 A transients. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN − VOUT ≈ 100 mV at full load - maximizes usable battery capacity in Li-ion systems. |
| Internal Softstart | Digital ramp limits inrush current to ≤ILIM/8 initially - prevents input voltage sag on weak sources like coin cells or USB ports. |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 1.65 V - prevents thermal runaway during output faults. |
| Thermal Shutdown Recovery | Hysteresis of ~20°C ensures stable restart after cooling - avoids oscillatory shutdown/restart under sustained overload. |
Applications
| PDA / Smart Phone Core Rail | USB-Powered Modem Interface |
|---|---|
Use Scenario: Powering ARM-based application processors and memory subsystems 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 dynamic load transient support and low-noise PFM/PWM switching. Use Value: 95% efficiency and 18 µA quiescent current extend battery life >20% versus LDO alternatives while maintaining <30 mV output droop during CPU burst loads. | Use Scenario: Generating clean 3.3 V supply for USB-to-serial bridge ICs, PHY transceivers, and RS-232 level shifters in compact modems. IC Role / Device Role / Timing Role: Fixed-output buck converter providing regulated 3.3 V from 5 V USB bus with EMI-controlled 1.25 MHz switching. Use Value: Forced PWM mode (MODE = VIN) ensures constant 1.25 MHz frequency for predictable filter design and compliance with USB EMI standards. |
| Notebook Subsystem I/O | xDSL Line Card Bias Supply |
Use Scenario: Supplying 3.3 V to PCIe slot controllers, SD card readers, and USB hubs in ultraportable notebooks with 3-cell NiMH input. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator supporting wide 2.5–6.0 V input range and thermal-aware operation up to 85°C ambient. Use Value: PowerPAD™ thermal design enables 1.2 A continuous output at 70°C ambient without derating - eliminates need for heatsinks in thin form factors. | Use Scenario: Providing stable 3.3 V bias for DSL analog front-end (AFE) and line driver ICs in residential xDSL gateways. IC Role / Device Role / Timing Role: Low-EMI, high-PWM-frequency DC-DC stage minimizing RF interference with upstream ADSL/VDSL signal paths. Use Value: 1.25 MHz fixed-frequency operation places switching harmonics outside DSL downstream bands (up to 12 MHz), simplifying board-level filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62046DGQ | Same electrical specs; 10-pin MSOP-PowerPAD™ package (60°C/W RθJA) vs QFN's 48.7°C/W - lower thermal performance at high ambient. | Preferred where legacy MSOP footprints exist or hand-soldering is required; less suitable for high-density 3×3 mm layouts. | Select DGQ only if board space permits larger MSOP outline or thermal margin exceeds 15°C. |
| TPS62130ARGTR | Higher 3 A rating, 2.7–6.5 V input, 1.25 MHz, but fixed 3.3 V version requires external feedback resistors (not pin-compatible). | Supports higher-current loads and wider input range; lacks integrated 3.3 V reference - needs FB resistor network and layout changes. | Choose ARGTR only when >1.2 A output or >6.0 V input is required; not a drop-in replacement. |
Compared with TPS62046DGQ, the TPS62046DRCR offers superior thermal performance in a smaller footprint, while TPS62130ARGTR provides higher current capability at the cost of added BOM complexity and non-pin-compatibility.
Availability
TPS62046DRCR is available at Aetrix Electronics and suitable for PDA power management, USB modem interface design, and notebook subsystem I/O requiring stable component supply with guaranteed long-term sourcing.
Supply support for TPS62046DRCR 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 technologies with over 50 years of innovation in energy-efficient power conversion.
The TPS6204x product line was engineered for battery-powered portable electronics, delivering high-efficiency, low-quiescent-current DC-DC conversion in miniature thermally enhanced packages for PDAs, smart phones, and subnotebooks.
FAQ
What is the exact output voltage tolerance of the TPS62046DRCR across temperature and load?
The TPS62046DRCR delivers a fixed 3.3 V output with ±3% tolerance over the full operating range: −40°C to 85°C ambient, 0–1.2 A load, and 3.6–6.0 V input. This specification is verified per TI SLVS463B datasheet Section 6.5, where VO accuracy is digitally controlled and tested at both zero and full load conditions.
Does the TPS62046DRCR require external feedback resistors for its 3.3 V output?
No, the TPS62046DRCR does not require external feedback resistors. As a fixed-output variant, its FB pin is internally connected to the 3.3 V output node. External resistors are only needed for the adjustable TPS62040 version; adding them to TPS62046DRCR would disrupt regulation and is not supported.
Can the TPS62046DRCR operate from a single 3.7 V Li-ion cell throughout its full discharge curve?
Yes, the TPS62046DRCR supports input voltages from 2.5 V to 6.0 V, covering the full Li-ion discharge range (≈4.2 V fully charged to ≈2.7 V cutoff). Its 100% duty-cycle mode maintains regulation even when VIN drops within 100 mV of VOUT, maximizing usable battery capacity without brownout.
What is the recommended minimum output capacitance for stable operation of the TPS62046DRCR?
The TPS62046DRCR is characterized and specified for stable operation with a minimum 22 µF ceramic output capacitor (e.g., Taiyo Yuden JMK316BJ226ML, 1206 case). Using less than 22 µF may cause excessive output ripple (>1% VO) or instability during load transients, as confirmed in Figure 10 and Section 8.2.2 of the SLVS463B datasheet.
How does the MODE pin affect efficiency and EMI performance in the TPS62046DRCR?
When MODE is grounded, TPS62046DRCR enters automatic PWM/PFM mode: >100 mA load → 1.25 MHz PWM (high efficiency); <100 mA → variable-frequency PFM (18 µA IQ, lower EMI). Pulling MODE high forces fixed 1.25 MHz PWM at all loads, improving EMI predictability but reducing light-load efficiency by ~15% at 1 mA.
TPS62046DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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-VSON (3x3)
TPS62046DRCR FAQ
1.How can I place an order for TPS62046DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62046DRCR 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 TPS62046DRCR reliable?
The price and inventory of TPS62046DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62046DRCR is usually 5 days.
3.What payment methods are accepted for TPS62046DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62046DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62046DRCR?
TPS62046DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62046DRCR 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 TPS62046DRCR?
For technical support, including TPS62046DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62046DRCR requirements.
6.How does Aetrix verify that TPS62046DRCR is sourced from the original manufacturer or authorized distributors?
All TPS62046DRCR 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 TPS62046DRCR meets industry standards.
7.What is the process for return or replacement of TPS62046DRCR?
All TPS62046DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62046DRCR, 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 TPS62046DRCR part is unused and in its original packaging.
Return procedure for TPS62046DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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