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Texas Instruments TPS62044DRCR
- Part No.:
- TPS62044DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62044DRCR.pdf
- Description:
- IC REG BUCK 1.8V 1.2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,823
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Product details
Overview
TPS62044DRCR from Texas Instruments is a fixed-output 1.8 V, 1.2 A synchronous step-down DC-DC converter in a 10-pin QFN 3×3 mm PowerPad™ package. It operates from 2.5 V to 6.0 V input, delivers up to 95% efficiency at 1.25 MHz switching frequency, and supports power save mode (PFM) at light loads for ultra-low quiescent current (18 µA typical). It is designed for Li-ion–powered portable systems requiring stable low-voltage rail generation.
For engineers reviewing the TPS62044DRCR datasheet, TPS62044DRCR pinout, TPS62044DRCR application, or TPS62044DRCR equivalent, key selection criteria include its fixed 1.8 V output, thermal shutdown protection, MODE pin controllable PWM/PFM operation, 100% duty cycle low-dropout capability, and compatibility with standard 22 µF ceramic input/output capacitors and 6.2 µH inductors.
Technical Context
The TPS62044DRCR 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 internal 0.5 V reference and fixed feedback divider eliminate external resistor networks required by adjustable variants.
It integrates dual MOSFETs (P-channel high-side switch with 115 mΩ typical RDS(on) at 3.6 V, N-channel synchronous rectifier with 85 mΩ), a 1.25 MHz oscillator, soft-start circuitry, and comparator-based power save mode control that transitions between PWM and PFM based on average inductor current threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±3% over full load (0–1.2 A) and input range (2.5–6.0 V) |
| Max Output Current | 1.2 A continuous; supports peak currents up to 1.85 A before current limit activation |
| Switching Frequency | 1.25 MHz nominal (1–1.5 MHz range); reduces EMI and enables compact 6.2 µH inductor use |
| Quiescent Current | 18 µA typical in power save mode; enables >100-hour battery life in always-on portable standby |
| Input Voltage Range | 2.5 V to 6.0 V; compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd, or USB 5 V rails |
| Efficiency Peak | Up to 95% at 600 mA load and 3.6 V input; maintains >85% down to 1 mA in PFM mode |
| Thermal Shutdown | Activates at 150°C junction temperature; disables both MOSFETs until cooldown to ~150°C |
Pinout & Package
TPS62044DRCR uses a thermally enhanced 10-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed PowerPad™ soldered to PCB ground for optimal thermal dissipation (RθJA = 48.7°C/W with thermal vias).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic; pulls device into <0.1 µA shutdown when grounded; must not float |
| VIN (Pins 2,3) | Power input | Accepts 2.5–6.0 V; dual pins reduce IR drop and improve thermal path to PowerPad |
| GND (Pin 4) | Analog ground | Reference for FB and MODE; separate from PGND to minimize noise coupling into feedback loop |
| FB (Pin 5) | Feedback input | Internally connected to fixed 1.8 V divider; no external resistors required for TPS62044DRCR |
| MODE (Pin 6) | Operation mode select | Low = auto PWM/PFM; High = forced PWM only; enables noise-sensitive fixed-frequency filtering |
| SW (Pins 7,8) | Switch node | Drain connection of internal P-MOSFET and source of N-MOSFET; requires minimal trace area to reduce EMI |
| PGND (Pins 9,10) | Power ground | High-current return path for inductor and MOSFETs; tied to PowerPad for thermal and electrical performance |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal (1.814 V) at light load, providing headroom to absorb heavy-load transients without undershoot |
| 100% Duty Cycle Operation | Enables regulation down to VIN ≈ VOUT + ILOAD × RDS(on), extending usable battery life in Li-ion applications |
| Internal Softstart | Digital ramp limits inrush current via stepped switch current (ILIM/8 → ILIM/4 → ILIM/2 → full ILIM), preventing input droop on weak sources |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 0.9 V, limiting fault energy during startup or overload |
| Thermal Foldback | Gradually reduces output current as junction temperature approaches 150°C, avoiding abrupt shutdown in sustained high-temp operation |
Applications
| PDA / Pocket PC Power Rail | USB-Powered Modem Supply |
|---|---|
Use Scenario: Powering ARM9-based PDA main logic rail from single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 1.8 V system supply regulator delivering 1.2 A with dynamic voltage positioning to handle CPU burst loads. Use Value: Enables >8-hour runtime with 1500 mAh battery and eliminates need for external LDO post-regulation due to tight ±3% output tolerance and low 1% ripple in PFM mode. | Use Scenario: Generating clean 1.8 V for USB 2.0 modem PHY and baseband ICs from 5 V USB bus. IC Role / Device Role / Timing Role: Efficient intermediate bus converter replacing linear regulator to avoid thermal derating at 500 mA load. Use Value: Reduces board temperature rise by 22°C vs. LDO solution and meets USB inrush current limits via controlled softstart. |
| Notebook Subsystem Core Supply | xDSL Line Card DSP Power |
Use Scenario: Supplying 1.8 V core voltage to embedded microcontroller and touch controller in ultraportable notebook. IC Role / Device Role / Timing Role: Always-on power domain regulator supporting RTC, keyboard, and sensor interfaces with <18 µA quiescent current. Use Value: Extends suspend-to-RAM battery life to >30 days; MODE pin allows forced PWM during active compute phases for predictable EMI profile. | Use Scenario: Providing 1.8 V rail for ADSL2+ DSP and analog front-end in carrier-grade xDSL line card. IC Role / Device Role / Timing Role: Noise-sensitive power stage operating at 1.25 MHz to avoid interference with upstream/downstream RF bands. Use Value: Achieves <10 mVPP output ripple with 22 µF ceramic caps; fixed-frequency PWM mode (MODE = high) simplifies EMI filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62044DGQ | Same electrical specs; MSOP-10 package (4.4 mm × 3 mm) with larger RθJA (60°C/W) and no PowerPad thermal enhancement | Less suitable for high-ambient or high-power-density layouts where thermal management is critical | Select DGQ only if legacy MSOP footprint is required and thermal margin ≥25°C exists at 1.2 A load |
| TPS62130ARGTR | Higher 3-A rating, 2.5–6 V input, adjustable/fixed 1.8 V option; 2-MHz switching; lower 12 µA IQ; QFN-16 package | Supports higher current and tighter transient response but requires different layout, feedback network (if adjustable), and BOM revision | Choose ARGTR for next-gen designs needing scalability beyond 1.2 A or improved light-load efficiency, accepting PCB redesign effort |
Compared with TPS62044DRCR, TPS62044DGQ offers identical functionality in a thermally inferior MSOP package, while TPS62130ARGTR provides higher current headroom and better quiescent performance at the cost of increased complexity and footprint change - neither is pin-compatible, but both serve overlapping portable power applications.
Availability
TPS62044DRCR is available at Aetrix Electronics and suitable for PDA power rails, USB modem supplies, notebook subsystems, and xDSL line cards requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for TPS62044DRCR 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 decades of expertise in high-efficiency DC-DC conversion.
The TPS6204x product line was engineered specifically for battery-powered portable electronics, delivering high efficiency across wide load ranges while minimizing board space and external component count through integrated synchronous switches and fixed-output variants like TPS62044DRCR.
FAQ
What is the output voltage accuracy of the TPS62044DRCR over temperature and load?
The TPS62044DRCR maintains a fixed 1.8 V output with ±3% accuracy across the full operating ambient temperature range (−40°C to 85°C) and full load current range (0 mA to 1.2 A), as verified under recommended conditions (VI = 2.5–6.0 V). This specification includes line regulation (0%/V) and load regulation (0%/mA) contributions, ensuring stable rail integrity for sensitive digital logic without external trimming.
Does the TPS62044DRCR require external feedback resistors?
No, the TPS62044DRCR does not require external feedback resistors. It integrates an internal resistor divider configured for a precise 1.8 V output, connecting directly to the FB pin internally. Unlike the adjustable TPS62040 variant, this eliminates component count, layout sensitivity, and potential drift sources - simplifying design and improving long-term stability.
How does the MODE pin affect efficiency and noise performance in the TPS62044DRCR?
When the MODE pin is pulled low, the TPS62044DRCR operates in automatic PWM/PFM mode, achieving up to 95% efficiency at medium loads and maintaining >85% at 1 mA via variable-frequency PFM. Pulling MODE high forces fixed 1.25 MHz PWM operation, which increases light-load quiescent current (to ~3.5 mA) but delivers predictable EMI spectra ideal for noise-sensitive RF sections in modems or xDSL systems.
What thermal considerations apply to the TPS62044DRCR's QFN PowerPad™ package?
The TPS62044DRCR's QFN package relies on its exposed PowerPad™ soldered to a PCB ground plane with ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) to achieve the rated 48.7°C/W junction-to-ambient thermal resistance. Without proper PowerPad connection, junction temperature can exceed 150°C at 1.2 A load, triggering thermal shutdown. TI recommends following SLMA002 layout guidelines for reliable thermal performance.
Can the TPS62044DRCR operate with input voltages below 2.5 V?
No, the TPS62044DRCR has a specified minimum input voltage of 2.5 V per absolute maximum and recommended operating conditions. Below this, undervoltage lockout (UVLO) prevents switching, and operation is not guaranteed. At 2.5 V input, the device sustains 1.8 V output only up to ~800 mA due to RDS(on) losses; for full 1.2 A capability, VI ≥ 2.7 V is recommended per typical performance curves.
TPS62044DRCR 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):
- 1.8V
- 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)
TPS62044DRCR FAQ
1.How can I place an order for TPS62044DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62044DRCR 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 TPS62044DRCR reliable?
The price and inventory of TPS62044DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62044DRCR is usually 5 days.
3.What payment methods are accepted for TPS62044DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62044DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62044DRCR?
TPS62044DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62044DRCR 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 TPS62044DRCR?
For technical support, including TPS62044DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62044DRCR requirements.
6.How does Aetrix verify that TPS62044DRCR is sourced from the original manufacturer or authorized distributors?
All TPS62044DRCR 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 TPS62044DRCR meets industry standards.
7.What is the process for return or replacement of TPS62044DRCR?
All TPS62044DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62044DRCR, 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 TPS62044DRCR part is unused and in its original packaging.
Return procedure for TPS62044DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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