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Texas Instruments TPS62112RSAR
- Part No.:
- TPS62112RSAR
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS62112RSAR.pdf
- Description:
- IC REG BUCK 5V 1.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,227
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Product details
Overview
TPS62112RSAR from Texas Instruments is a fixed-output 5-V, 1.5-A synchronous step-down DC-DC converter in a 16-pin VQFN (RSA) package. It operates from 3.1 V to 17 V input, delivers up to 95% efficiency at 600 mA, supports external clock synchronization up to 1.4 MHz, and integrates P-channel and N-channel MOSFETs for high-efficiency point-of-load regulation in battery-powered industrial and portable systems.
For engineers reviewing the TPS62112RSAR datasheet, TPS62112RSAR pinout, TPS62112RSAR application, or TPS62112RSAR equivalent, key selection criteria include its fixed 5-V output, 1.5-A capability, PFM/PWM hybrid operation mode, 20-µA quiescent current, and thermal shutdown protection - all validated for use in 12-V bus conversion and handheld embedded power rails.
Technical Context
The TPS62112RSAR uses voltage-mode PWM control with input-voltage feedforward for fast line/load transient response. Its internal 1-MHz oscillator enables compact 6.8-µH inductor and 22-µF ceramic capacitor designs, while SYNC pin control allows forced PWM (low-noise) or PFM/PWM (high-efficiency light-load) operation.
It integrates dual MOSFETs with typical RDS(ON) of 165 mΩ (P-ch) and 145 mΩ (N-ch), features undervoltage lockout (2.8–3.1 V threshold), 98.4% power-good detection, and thermal shutdown at 145°C. The device enters shutdown with <2 µA current when EN is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±3% over full temperature and load range - eliminates external feedback resistors and simplifies layout. |
| Max Output Current | 1.5 A at VIN ≥ 6 V - supports moderate-power digital loads without external current boosting. |
| Input Voltage Range | 3.1 V to 17 V - compatible with 2–4-cell Li-ion batteries and standard 12-V/15-V rails. |
| Efficiency | Up to 95% at 600 mA (VIN = 12 V, VOUT = 5 V) - reduces thermal stress and extends battery runtime. |
| Quiescent Current | 20 µA typical (SYNC = GND) - enables ultra-low-power standby in always-on systems. |
| Switching Frequency | 1 MHz nominal (internal) or 0.8–1.4 MHz synchronized - allows small passive component selection and EMI control. |
| Thermal Shutdown | 145°C typical - protects against sustained overload or poor PCB thermal design. |
| Package | 16-pin VQFN (RSA), 4.0 mm × 4.0 mm - provides low thermal resistance (RθJA = 48.2°C/W) and space-efficient mounting. |
Pinout & Package
TPS62112RSAR is housed in a 4.0 mm × 4.0 mm, 16-pin VQFN (RSA) package with exposed thermal pad soldered to AGND for optimal thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (2,3) | Power input supply | Connects to main input rail (3.1–17 V); decoupled with 10-µF ceramic capacitor near pins. |
| VINA (8) | Analog supply input | Provides clean bias for internal reference and comparators; separate from power-stage VIN. |
| EN (4) | Enable control | Logic-high (>1.3 V) enables regulation; logic-low (<0.3 V) disables with <2 µA shutdown current. |
| SYNC (5) | Frequency control | Tied high for forced PWM (low-noise); tied low for PFM/PWM auto-switching (high-efficiency light load). |
| SW (14,15) | Power switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and ground plane clearance. |
| PGND (1,16) | Power ground return | Low-impedance return path for high-current switch loop - must be connected directly to inductor and input cap ground. |
| GND (11,12) | Analog ground | Reference for FB, LBI, PG; connects to AGND and PGND at single-point star ground. |
| PG (13) | Power-good indicator | Open-drain output pulled high when VOUT > 4.92 V (98.4% of 5 V); requires external pullup to VOUT. |
| LBI (7) | Low-battery monitor input | Accepts resistor divider to detect input voltage drop; trip point 1.256 V ±1.5% - used for battery cutoff. |
| LBO (6) | Low-battery output | Open-drain alert signal - pulled low when LBI falls below threshold; floats or ties to GND if unused. |
| AGND (9) | Analog ground reference | Internal analog circuit common; connect to system AGND and exposed thermal pad. |
| Exposed Pad | Thermal & mechanical anchor | Soldered to AGND plane - critical for thermal dissipation (RθJC(bot) = 3.3°C/W) and board-level reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | Eliminates external switches and reduces BOM count; RDS(ON) optimized for 3.1–17 V input range. |
| PFM/PWM hybrid mode | Maintains >85% efficiency down to 100 µA load - essential for intermittent-sensing IoT nodes. |
| 100% duty cycle capability | Enables dropout operation as low as VOUT + 0.3 V - supports regulation near end-of-battery discharge. |
| External clock synchronization | Aligns switching to system clock or avoids sensitive frequency bands - improves EMI compliance in dense layouts. |
| Overtemperature & overcurrent protection | Auto-recovering thermal shutdown and cycle-by-cycle current limiting prevent damage during fault conditions. |
| Soft-start circuit | Digital ramp limits inrush current - prevents input rail sag during cold start into large output capacitors. |
Applications
| Industrial Point-of-Load | Handheld Medical Devices |
|---|---|
Use Scenario: Regulating 5 V from a 12-V backplane in programmable logic controllers (PLCs) and I/O modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 5-V rail to microcontrollers, sensors, and communication interfaces. Use Value: High efficiency across 10 mA–1.2 A load range minimizes heat buildup in sealed enclosures; 1-MHz operation allows compact 6.8-µH inductor placement. | Use Scenario: Powering ARM-based patient monitors and portable ultrasound units powered by 3.7-V Li-ion packs. IC Role / Device Role / Timing Role: Main system regulator converting battery voltage to fixed 5 V for USB peripherals, display drivers, and ADC references. Use Value: 20-µA quiescent current extends standby time; PFM mode maintains >90% efficiency at sleep currents below 1 mA. |
| Automated Test Equipment | Smart Metering Modules |
Use Scenario: Generating clean 5-V supply for precision DACs, op-amps, and FPGA configuration in benchtop instruments. IC Role / Device Role / Timing Role: Low-noise synchronous buck converter operating in forced PWM mode via SYNC = HIGH. Use Value: Fixed 1-MHz switching enables predictable EMI filtering; integrated MOSFETs eliminate gate-drive complexity and layout sensitivity. | Use Scenario: Providing regulated 5-V rail in AMI smart meters with long-life battery backup and RF communication subsystems. IC Role / Device Role / Timing Role: Primary DC-DC stage powering MCU, RF transceiver, and real-time clock from main supply or backup capacitor. Use Value: Undervoltage lockout (2.8 V) and LBI monitoring enable graceful shutdown before battery depletion; thermal shutdown ensures reliability in outdoor enclosures. |
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 |
|---|---|---|---|
| TPS62111RSAR | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage. | Used where 3.3-V logic rail is required instead of 5 V - no change to PCB layout or support components. | Select when system requires 3.3 V instead of 5 V; same thermal, efficiency, and timing behavior. |
| TPS62130ARGTR | Higher 3-A rating, 2.95–6 V input, 3-MHz switching, smaller 3-mm × 2-mm WSON package. | Better suited for space-constrained, higher-current applications but incompatible input voltage range and pinout. | Choose for next-gen designs needing higher current density and lower profile - requires new layout and requalification. |
Compared with TPS62111RSAR, the TPS62112RSAR offers identical architecture and layout compatibility but targets 5-V systems; versus TPS62130ARGTR, it trades higher current and frequency for broader input range and proven thermal robustness in industrial environments.
Availability
TPS62112RSAR is available at Aetrix Electronics and suitable for industrial automation, handheld medical instrumentation, and smart metering applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62112RSAR 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS6211x product line delivers high-efficiency, low-noise synchronous buck converters optimized for battery-powered portable equipment and 12-V point-of-load regulation in space- and thermally constrained systems.
FAQ
What is the output voltage tolerance of the TPS62112RSAR over temperature and load?
The TPS62112RSAR has a fixed 5-V output with ±3% tolerance across the full operating temperature range (–40°C to 85°C) and load current (0–1.5 A), as specified in the Electrical Characteristics table under "Fixed output voltage tolerance" for VIN = 5.5 V to 17 V. This includes combined line, load, and temperature effects - no external trimming is required.
Can the TPS62112RSAR operate with an input voltage below 3.1 V?
No. The TPS62112RSAR has an absolute minimum recommended input voltage of 3.1 V and an undervoltage lockout (UVLO) threshold that disables operation below approximately 2.8 V. Attempting to operate below 3.1 V risks unstable regulation or failure to start; for sub-3-V battery applications, consider TI's TPS62840 or similar ultra-low-input buck converters.
Does the TPS62112RSAR support prebiased start-up?
Yes. The TPS62112RSAR supports monotonic prebiased start-up: during startup into a precharged output, the N-channel MOSFET remains off until the internal soft-start ramp exceeds the existing output voltage, preventing reverse current flow and ensuring controlled voltage rise without overshoot or oscillation.
How is thermal performance affected if the exposed thermal pad is not soldered?
If the exposed thermal pad of the TPS62112RSAR is not soldered to AGND, junction-to-board thermal resistance increases dramatically - from 16.3°C/W (soldered) to >50°C/W (unsoldered). This can cause premature thermal shutdown at ≤800 mA load, especially in still-air environments. TI mandates soldering the pad per datasheet layout guidelines for rated performance.
Is the TPS62112RSAR pin-compatible with other devices in the TPS6211x family?
Yes. The TPS62112RSAR shares identical pin configuration, package (16-pin VQFN RSA), and footprint with TPS62110RSAR, TPS62111RSAR, and TPS62113RSAR. Only the output voltage (5 V fixed) and LBI functionality (standard, not enhanced) differ - enabling direct substitution in 5-V designs without PCB changes.
TPS62112RSAR 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):
- 5V
- 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)
TPS62112RSAR FAQ
1.How can I place an order for TPS62112RSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62112RSAR 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 TPS62112RSAR reliable?
The price and inventory of TPS62112RSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62112RSAR is usually 5 days.
3.What payment methods are accepted for TPS62112RSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62112RSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62112RSAR?
TPS62112RSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62112RSAR 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 TPS62112RSAR?
For technical support, including TPS62112RSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62112RSAR requirements.
6.How does Aetrix verify that TPS62112RSAR is sourced from the original manufacturer or authorized distributors?
All TPS62112RSAR 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 TPS62112RSAR meets industry standards.
7.What is the process for return or replacement of TPS62112RSAR?
All TPS62112RSAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62112RSAR, 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 TPS62112RSAR part is unused and in its original packaging.
Return procedure for TPS62112RSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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