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Texas Instruments TPS62111RSARG4
- Part No.:
- TPS62111RSARG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS62111RSARG4.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,254
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Product details
Overview
TPS62111RSARG4 from Texas Instruments is a fixed-output 3.3 V, 1.5-A synchronous step-down DC-DC converter in a 16-pin VQFN (4.0 mm × 4.0 mm) package, operating from 3.1 V to 17 V input, delivering up to 95% efficiency in PFM/PWM mode, and used for point-of-load regulation in handheld scanners and PDAs.
For engineers reviewing the TPS62111RSARG4 datasheet, TPS62111RSARG4 pinout, TPS62111RSARG4 application, or TPS62111RSARG4 equivalent, key selection criteria include its 3.3 V fixed output, 1-MHz nominal switching frequency, 20 µA quiescent current, thermal shutdown protection, and SYNC-controlled PFM/PWM mode selection.
Technical Context
The TPS62111RSARG4 implements voltage-mode PWM control with input-voltage feedforward for fast line/load transient response. Its integrated N- and P-channel MOSFETs enable synchronous rectification, eliminating external diodes and reducing conduction losses.
It supports dual operating modes: forced PWM (SYNC = high) for low-noise operation, and automatic PFM/PWM (SYNC = low) for high light-load efficiency. The device enters shutdown (<2 µA) when EN is low and features undervoltage lockout (2.8–3.1 V threshold) and thermal shutdown at 145°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±3% over full load/temperature range - ensures stable rail for 3.3-V logic and peripherals. |
| Max Output Current | 1.5 A at VIN ≥ 6 V - supports moderate-power digital loads without external current limiting. |
| Input Voltage Range | 3.1 V to 17 V - compatible with 2–4-cell Li-ion batteries and 12-V industrial rails. |
| Switching Frequency | 900–1100 kHz (typical 1 MHz) - enables use of compact 6.8-µH inductors and 22-µF ceramic output capacitors. |
| Quiescent Current | 20 µA (typical) at 7.2 V - extends battery life in always-on or low-duty-cycle portable systems. |
| Efficiency | Up to 95% at 600 mA - minimizes thermal rise and power loss in space-constrained designs. |
| Protection Features | Overcurrent (2.1–2.6 A), thermal shutdown (145°C), UVLO (2.8 V trip), and soft-start - prevents damage during fault or startup conditions. |
Pinout & Package
TPS62111RSARG4 uses a 16-pin VQFN (RSA) package with 4.0 mm × 4.0 mm body size and exposed thermal pad soldered to AGND for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 9) | Analog ground reference | Low-noise return for feedback and internal bias circuits; must be connected to PGND/GND at single point. |
| EN (Pin 4) | Enable control input | Logic-high enables regulation; logic-low forces shutdown (<2 µA IQ); floating not allowed. |
| FB (Pin 10) | Feedback node | Internally tied to 3.3 V output - no external divider needed; connects directly to VOUT for fixed-output operation. |
| PGND (Pins 1, 16) | Power ground return | High-current return path for SW node; must be routed with low-inductance copper to minimize noise and EMI. |
| SW (Pins 14, 15) | Switch node | Drain connection of internal P- and N-channel MOSFETs; drives external inductor; high dv/dt node requiring careful layout. |
| VIN (Pins 2, 3) | Main power input | Connects to 3.1–17 V supply; requires local 10-µF ceramic capacitor close to pins for stability. |
| VINA (Pin 8) | Analog supply input | Provides clean bias for internal circuitry; decoupled separately with 1-µF capacitor to reduce noise coupling. |
| SYNC (Pin 5) | Mode and clock control | High = forced PWM (low-noise); low = PFM/PWM auto-switching (high light-load efficiency); accepts 0.8–1.4 MHz CMOS clock. |
| PG (Pin 13) | Power-good indicator | Open-drain output pulled high when VOUT > 98.4% of 3.3 V; requires external pullup to VOUT for system sequencing. |
| LBI/LBO (Pins 7, 6) | Low-battery monitor I/O | LBI senses external battery divider; LBO asserts open-drain low if LBI < 1.256 V - used for battery warning in portable devices. |
Key Features
| Feature | Design Value |
|---|---|
| PFM/PWM auto-mode transition | Maintains >90% efficiency from 100 µA to 1.5 A load - eliminates need for external mode control logic. |
| 100% duty cycle capability | Enables dropout operation down to VIN = VOUT + 0.3 V - critical for battery-powered systems near end-of-life. |
| Integrated power MOSFETs | Eliminates external high-side/low-side switches and reduces BOM count by 4+ components versus controller-based solutions. |
| Soft-start with monotonic prebias start | Prevents output voltage overshoot and inrush current spikes during cold start or hot-plug scenarios. |
| Thermal shutdown with hysteresis | Shuts down at 145°C and resumes at ~135°C - protects silicon and PCB under sustained overload or poor heatsinking. |
Applications
| Handheld Scanners | Industrial Point-of-Load |
|---|---|
Use Scenario: Battery-powered barcode scanner requiring regulated 3.3 V for image sensor, MCU, and interface ICs during intermittent high-current bursts. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 7.2–12 V battery or adapter input to stable 3.3 V rail with fast transient response. Use Value: 95% peak efficiency and 20 µA quiescent current extend runtime between charges; PFM mode maintains >85% efficiency at 100 µA standby current. | Use Scenario: DIN-rail mounted PLC module drawing variable current from a 12 V backplane, needing clean, reliable 3.3 V for communication interfaces. IC Role / Device Role / Timing Role: Local step-down regulator providing isolated 3.3 V supply with PG signaling for system health monitoring. Use Value: Power-good output enables safe firmware boot sequencing; thermal shutdown prevents field failures under ambient temperature drift or airflow blockage. |
| PDAs and Handheld PCs | Medical Portable Devices |
Use Scenario: Legacy PDA with ARM processor and LCD backlight, powered by 3-cell Li-ion (9–12.6 V), requiring low-noise 3.3 V for core logic and memory. IC Role / Device Role / Timing Role: Main system regulator operating in forced PWM mode (SYNC = high) to suppress switching noise near sensitive analog sections. Use Value: 1-MHz fixed frequency allows predictable EMI filtering; 48.2°C/W θJA enables operation up to 85°C ambient without heatsink. | Use Scenario: Portable glucose meter using coin-cell or rechargeable battery, where long shelf life and consistent measurement accuracy are critical. IC Role / Device Role / Timing Role: Precision power supply enabling accurate ADC reference and sensor biasing via stable 3.3 V rail. Use Value: ±3% output tolerance and <2% load regulation ensure consistent sensor excitation and signal chain performance across battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62110RSARG4 | Adjustable 1.2–16 V output; no internal feedback divider; requires external resistor network. | Suitable for multi-rail systems needing programmable outputs, not fixed 3.3 V. | Select only if output voltage flexibility outweighs added BOM cost and layout complexity. |
| TPS62130RGTR | Higher 3-A output; 2.95–6 V input; 2.5-MHz switching; smaller 3-mm × 3-mm VQFN. | Better suited for compact, higher-current applications like wearables or IoT edge nodes. | Choose when >1.5 A load or tighter board area constraints exist; not drop-in due to different pinout and voltage range. |
Compared with TPS62111RSARG4, TPS62110RSARG4 offers design flexibility at the cost of external components, while TPS62130RGTR delivers higher current and density but requires redesign for input range and footprint compatibility.
Availability
TPS62111RSARG4 is available at Aetrix Electronics and suitable for point-of-load regulation from 12-V buses, handheld scanners, and industrial embedded controllers requiring stable component supply and long-term lifecycle support.
Supply support for TPS62111RSARG4 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-reliability DC-DC conversion.
The TPS6211x product line was designed for portable and industrial systems requiring high-efficiency, low-noise, and thermally robust step-down regulation from wide-input-voltage sources such as multi-cell batteries and 12-V rails.
FAQ
What is the recommended input capacitor for TPS62111RSARG4?
A 10-µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and VINA pins is recommended per the datasheet. This value ensures stable operation across the 3.1–17 V input range and suppresses high-frequency switching noise. Additional bulk capacitance may be added externally depending on source impedance, but the 10-µF local cap is mandatory for loop stability and EMI control in the TPS62111RSARG4 design.
Does TPS62111RSARG4 support prebiased output startup?
Yes, the TPS62111RSARG4 supports monotonic prebiased output startup. During this mode, the internal N-channel MOSFET remains off until the soft-start ramp exceeds the existing output voltage, preventing reverse current flow and ensuring controlled voltage rise. This behavior is confirmed in Section 9.4.1 of the SLVS585E datasheet and applies directly to the TPS62111RSARG4 variant without modification.
What is the function of the SYNC pin on TPS62111RSARG4?
The SYNC pin on TPS62111RSARG4 serves two functions: (1) when pulled high, it forces continuous PWM operation for low-noise performance; (2) when grounded, it enables automatic PFM/PWM mode switching to maximize light-load efficiency. It also accepts external clock signals from 0.8 MHz to 1.4 MHz for EMI reduction. These behaviors are explicitly defined for the TPS62111RSARG4 in the "Synchronization" section (9.3.6) of the official datasheet.
Can TPS62111RSARG4 be used with an input voltage below 3.1 V?
No, TPS62111RSARG4 has a minimum recommended input voltage of 3.1 V and an absolute maximum UVLO release threshold of 3.1 V. Operation below this level risks improper startup, unstable regulation, or latch-up. The device shuts down when input falls below 2.8 V (UVLO threshold), and will not resume until VIN rises above 3.1 V. This specification is confirmed in Section 8.3 (Recommended Operating Conditions) of the TPS62111RSARG4 datasheet.
How does the power-good (PG) signal behave on TPS62111RSARG4?
The PG signal on TPS62111RSARG4 is an open-drain output that goes high-impedance when EN is low, and actively pulls low until VOUT reaches 98.4% of 3.3 V (i.e., ~3.25 V), after which it transitions high (with external pullup). It includes a 200-µs delay on falling edge and 50-µs on rising edge, and is only valid after UVLO is cleared. This timing and threshold behavior is specified for the TPS62111RSARG4 in Section 8.5 (Electrical Characteristics) and Figure 9 of the datasheet.
TPS62111RSARG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
TPS62111RSARG4 FAQ
1.How can I place an order for TPS62111RSARG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62111RSARG4 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 TPS62111RSARG4 reliable?
The price and inventory of TPS62111RSARG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62111RSARG4 is usually 5 days.
3.What payment methods are accepted for TPS62111RSARG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62111RSARG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62111RSARG4?
TPS62111RSARG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62111RSARG4 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 TPS62111RSARG4?
For technical support, including TPS62111RSARG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62111RSARG4 requirements.
6.How does Aetrix verify that TPS62111RSARG4 is sourced from the original manufacturer or authorized distributors?
All TPS62111RSARG4 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 TPS62111RSARG4 meets industry standards.
7.What is the process for return or replacement of TPS62111RSARG4?
All TPS62111RSARG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62111RSARG4, 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 TPS62111RSARG4 part is unused and in its original packaging.
Return procedure for TPS62111RSARG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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