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Texas Instruments TPS62111MRSAREP
- Part No.:
- TPS62111MRSAREP
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS62111MRSAREP.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,065
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Product details
Overview
TPS62111MRSAREP from Texas Instruments is a radiation-hardened, extended-temperature synchronous step-down DC-DC converter delivering a fixed 3.3 V output at up to 1.5 A. It operates from 3.1 V to 17 V input, features 20 µA quiescent current in PFM mode, 1 MHz nominal switching frequency, and integrated N- and P-channel MOSFETs - designed for point-of-load regulation in harsh-environment electronics including aerospace telemetry, military comms, and industrial control systems.
For engineers reviewing the TPS62111MRSAREP datasheet, TPS62111MRSAREP pinout, TPS62111MRSAREP application, or TPS62111MRSAREP equivalent, key selection criteria include its –55°C to 125°C operating range, 16-pin QFN (RSA) package with exposed thermal pad, fixed 3.3 V output accuracy (±7%), power-good and low-battery monitoring outputs, and SYNC-controlled PWM/PFM mode selection.
Technical Context
The TPS62111MRSAREP implements voltage-mode PWM control with input-voltage feedforward for fast line/load transient response. Its dual-MOSFET synchronous architecture eliminates external diode losses, enabling up to 95% efficiency across 0.1 mA–1.5 A load range.
Operation switches between forced-PWM (SYNC ≥1.5 V) and auto-PFM (SYNC = GND), with 100% duty cycle capability for ultra-low dropout. The internal 1.153 V reference feeds a precision feedback comparator, while dedicated AGND/PGND separation minimizes noise coupling in sensitive analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±7% over –55°C to 125°C, line/load/temperature |
| Input Voltage Range | 3.1 V to 17 V - supports 2-cell Li-ion, 12 V/15 V rails, and wide industrial bus inputs |
| Max Output Current | 1.5 A at VIN ≥6 V - enables single-rail powering of FPGA I/O banks or microcontroller cores |
| Quiescent Current | 20 µA typical in PFM mode - extends battery life in always-on sensor nodes |
| Switching Frequency | 900–1100 kHz (internal); synchronizable 800–1400 kHz - allows EMI filtering and clock domain alignment |
| Efficiency | 92% at 12 VIN/3.3 VOUT/600 mA - reduces thermal load in sealed enclosures |
| Protection Features | Overcurrent, overtemperature, undervoltage lockout (2.8–3.1 V threshold), and thermal shutdown |
Pinout & Package
TPS62111MRSAREP uses a 16-pin QFN (RSA) package with 4 mm × 4 mm footprint and exposed thermal pad soldered to AGND for enhanced thermal dissipation in high-reliability PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 PGND | Power ground return | Low-impedance path for high-frequency switch current - must connect directly to input/output capacitor ground planes |
| 2, 3 VIN | Main power input | Connects to bulk input capacitor; handles full input current up to 1.5 A |
| 4 EN | Enable control input | Logic-high (>1.3 V) enables regulation; logic-low (<0.3 V) reduces supply current to <2 µA |
| 5 SYNC | External clock sync input | CMOS-level signal (0.3–1.5 V low, ≥1.5 V high) selects PFM (GND) or forced-PWM (VIN) mode |
| 6 LBO | Open-drain low-battery output | Pulled low when LBI <1.256 V - signals end-of-life for 2-cell Li-ion or backup batteries |
| 7 LBI | Low-battery sense input | High-impedance (10–100 nA leakage) input for external resistor divider monitoring battery voltage |
| 8 VINA | Analog supply input | Provides clean bias for internal reference and comparators - decouple with 10 µF ceramic |
| 9 AGND | Analog ground reference | Separate ground for feedback and sensing circuitry - tie to PGND at single point near thermal pad |
| 10 FB | Feedback input | Internally tied to 3.3 V divider - not user-accessible on fixed-output variant; unused pin |
| 11, 12 GND | Digital ground | Reference for EN, SYNC, PG, LBO logic - route separately from PGND until star-point connection |
| 13 PG | Open-drain power-good output | Asserts high when VOUT >98.4% of nominal - requires external pullup to VOUT for system sequencing |
| 14, 15 SW | Switch node | Drain connection of internal P/N-MOSFETs - connects to inductor; high dv/dt node requiring tight layout |
| Exposed Pad | Thermal pad | Must be soldered to AGND plane for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Extended temperature operation | –55°C to 125°C free-air range with JEDEC-qualified reliability - suitable for space-grade and downhole applications |
| Synchronous rectification | Integrated N- and P-channel MOSFETs eliminate external Schottky loss - improves efficiency by 8–12% vs. diode-based designs |
| PFM/PWM hybrid control | Auto-switches to pulse-frequency modulation below ~200–400 mA load - maintains >85% efficiency at microamp loads |
| 100% duty cycle mode | Enables operation with VIN as low as VO + IO×(rDS(on)_P + RL) - maximizes usable battery voltage in portable systems |
| Dual monitoring outputs | Independent open-drain PG (power-good) and LBO (low-battery) signals - enable safe power sequencing and battery management without MCU intervention |
| Radiation-tolerant construction | Controlled baseline with DMS support and qualification pedigree - meets requirements for TID and SEE testing in mission-critical platforms |
Applications
| Aerospace Power Distribution | Military Radio Front-End |
|---|---|
Use Scenario: Regulating 12 V bus to 3.3 V for satellite telemetry transceivers operating in vacuum and thermal cycling. IC Role / Device Role / Timing Role: Primary point-of-load regulator supplying RF ICs, ADCs, and FPGAs with stable 3.3 V under wide input variation and extreme temperature swings. Use Value: 92% efficiency at 600 mA reduces heat generation in thermally isolated modules; PG signal validates rail integrity before data transmission. |
Use Scenario: Powering SDR baseband processors and DACs in handheld tactical radios subjected to shock, vibration, and wide ambient temperature shifts. IC Role / Device Role / Timing Role: Fixed-output buck converter providing clean 3.3 V to mixed-signal SoCs with simultaneous low-noise analog and high-speed digital domains. Use Value: Separate AGND/PGND pins and SYNC-controlled PWM mode suppress switching noise in ADC reference paths; LBO triggers graceful shutdown before battery cutoff. |
| Industrial PLC I/O Modules | Downhole Sensor Electronics |
Use Scenario: Converting 24 V field bus to 3.3 V for isolated digital I/O drivers and communication interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: High-input-voltage buck regulator delivering robust 3.3 V to microcontrollers and CAN transceivers in electrically noisy environments. Use Value: 17 V max input withstands 24 V bus transients; overtemperature protection prevents latch-up during cabinet overheating events. |
Use Scenario: Powering MEMS accelerometers and pressure sensors in oil/gas well logging tools exposed to 125°C ambient and high gamma radiation. IC Role / Device Role / Timing Role: Radiation-hardened DC-DC converter maintaining regulated 3.3 V output despite total ionizing dose exposure and thermal stress. Use Value: JEDEC-qualified extended-temperature operation and controlled baseline manufacturing ensure long-term parametric stability in inaccessible deployments. |
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 |
|---|---|---|---|
| TPS62110MRSAREP | Adjustable output (1.2–16 V) via external resistor divider; same package, temp range, and specs otherwise | Requires external feedback network; used where multiple output voltages needed on same board | Select when design flexibility outweighs BOM simplification - adds two resistors but enables shared layout across variants |
| TPS62112MRSAREP | Fixed 5 V output; identical quiescent current, efficiency, and thermal specs | Targets 5 V logic families (e.g., USB PHYs, older microcontrollers) instead of 3.3 V domains | Choose for 5 V system rails - no change to layout or thermal design; only output voltage differs |
Compared with TPS62110MRSAREP and TPS62112MRSAREP, the TPS62111MRSAREP provides optimal integration for 3.3 V systems - eliminating external feedback components while retaining identical reliability, thermal performance, and radiation tolerance across the family.
Availability
TPS62111MRSAREP is available at Aetrix Electronics and suitable for aerospace telemetry, military radio front-ends, and industrial PLC I/O modules requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for TPS62111MRSAREP 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 high-reliability ICs for industrial, automotive, and aerospace markets.
The TPS6211x-EP product line delivers radiation-tolerant, extended-temperature synchronous buck converters for mission-critical power management in space, defense, and energy exploration systems.
FAQ
What is the operating temperature range of the TPS62111MRSAREP?
The TPS62111MRSAREP is qualified for continuous operation from –55°C to 125°C free-air temperature. This extended range is achieved through JEDEC-compliant qualification including HAST, temperature cycling, and bond intermetallic life testing - making it suitable for deployment in spacecraft, downhole tools, and military vehicle electronics where ambient conditions exceed commercial limits.
Does the TPS62111MRSAREP require external feedback resistors?
No, the TPS62111MRSAREP does not require external feedback resistors. As a fixed 3.3 V output variant, its internal voltage divider is permanently configured - unlike the adjustable TPS62110MRSAREP. Pin 10 (FB) is internally connected and should remain unconnected in standard operation, simplifying layout and reducing BOM count.
How does the SYNC pin affect efficiency and noise performance of the TPS62111MRSAREP?
When SYNC is pulled low (GND), the TPS62111MRSAREP enters power-save mode (PFM), achieving 20 µA quiescent current and high light-load efficiency but with variable switching frequency. When SYNC is pulled high (≥1.5 V), it forces fixed-frequency PWM operation - trading slight efficiency loss at light loads for predictable EMI spectrum and reduced output ripple, critical for noise-sensitive analog circuits.
What protection features are built into the TPS62111MRSAREP?
The TPS62111MRSAREP integrates overcurrent protection (2.4 A switch current limit), overtemperature shutdown (145°C trip), undervoltage lockout (2.8–3.1 V hysteresis), and reverse-current blocking. These functions operate autonomously without external components - ensuring safe operation during input faults, thermal overload, or battery depletion in unattended systems.
Can the TPS62111MRSAREP support 100% duty cycle operation, and why is this important?
Yes, the TPS62111MRSAREP supports 100% duty cycle operation, where the P-channel MOSFET remains continuously on. This enables regulation even when input voltage approaches output voltage - critical for maximizing runtime from depleting 2-cell Li-ion batteries (e.g., dropping from 8.4 V to 6.0 V while sustaining 3.3 V output). The minimum dropout is determined by rDS(on)_P and inductor DCR.
TPS62111MRSAREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN 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):
- 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:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
TPS62111MRSAREP FAQ
1.How can I place an order for TPS62111MRSAREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62111MRSAREP 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 TPS62111MRSAREP reliable?
The price and inventory of TPS62111MRSAREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62111MRSAREP is usually 5 days.
3.What payment methods are accepted for TPS62111MRSAREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62111MRSAREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62111MRSAREP?
TPS62111MRSAREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62111MRSAREP 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 TPS62111MRSAREP?
For technical support, including TPS62111MRSAREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62111MRSAREP requirements.
6.How does Aetrix verify that TPS62111MRSAREP is sourced from the original manufacturer or authorized distributors?
All TPS62111MRSAREP 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 TPS62111MRSAREP meets industry standards.
7.What is the process for return or replacement of TPS62111MRSAREP?
All TPS62111MRSAREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS62111MRSAREP, 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 TPS62111MRSAREP part is unused and in its original packaging.
Return procedure for TPS62111MRSAREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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