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Texas Instruments TPS62112RSAT
- Part No.:
- TPS62112RSAT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS62112RSAT.pdf
- Description:
- IC REG BUCK 5V 1.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:670
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Product details
Overview
TPS62112RSAT from Texas Instruments is a fixed-output 5-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 at 600 mA with 20 µA quiescent current and integrated PFM/PWM mode switching - used for point-of-load regulation in handheld scanners and industrial PDAs.
For engineers reviewing the TPS62112RSAT datasheet, TPS62112RSAT pinout, TPS62112RSAT application, or TPS62112RSAT equivalent, key selection considerations include its fixed 5-V output, 1-MHz nominal switching frequency, SYNC-controlled PFM/PWM mode, thermal shutdown protection, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The TPS62112RSAT implements voltage-mode PWM control with input-voltage feedforward for fast line/load transient response. Its internal 1-MHz oscillator supports synchronization to external clocks from 800 kHz to 1.4 MHz, forcing fixed-frequency PWM operation when SYNC is high and enabling power-saving PFM mode when SYNC is grounded.
It integrates N- and P-channel MOSFETs with RDS(on) of 145–200 mΩ (N) and 165–250 mΩ (P), features undervoltage lockout (2.8–3.1 V threshold), thermal shutdown at 145°C, and an open-drain power-good (PG) output that asserts high when VOUT exceeds 98.4% of nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±3% over full load/temperature range - eliminates need for external feedback resistors. |
| 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 12-V industrial rails. |
| Switching Frequency | 1 MHz nominal (900–1100 kHz); synchronizable to 0.8–1.4 MHz - enables compact 6.8-µH inductor and 22-µF ceramic capacitor design. |
| Quiescent Current | 20 µA typical (SYNC = GND) - extends battery life in always-on portable systems. |
| Efficiency | 92% at 12 VIN, 5 VOUT, 600 mA - reduces thermal load in space-constrained enclosures. |
| Protection Features | Overcurrent (2.1–2.6 A limit), thermal shutdown (145°C), UVLO (2.8 V fall), and PG monitoring - ensures robust operation without external supervision circuitry. |
Pinout & Package
TPS62112RSAT is housed in a thermally enhanced 16-pin VQFN (RSA) package measuring 4.0 mm × 4.0 mm with an exposed thermal pad soldered to AGND for optimal heat dissipation and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (2,3) | Power input supply | Accepts 3.1–17 V; connects to bulk input capacitor and high-current PCB trace. |
| PGND (1,16) | Power ground return | Low-impedance path for switch node current; must be tied directly to VIN capacitor ground. |
| SW (14,15) | Switch node | Drives external inductor; requires short, low-inductance routing to minimize EMI and ringing. |
| EN (4) | Enable control | Logic-high (>1.3 V) enables regulation; logic-low (<0.3 V) disables device, reducing IQ to <2 µA. |
| SYNC (5) | Frequency control | High = forced PWM mode; low = PFM/PWM auto-switching; CMOS-level input for external clock sync. |
| PG (13) | Power-good indicator | Open-drain output pulled high when VOUT > 98.4% of 5 V; requires external pullup to VOUT. |
| LBI (7) | Low-battery monitor input | Threshold 1.256 V ±1.5%; unused pins must be grounded per datasheet guidance. |
| LBO (6) | Low-battery alert output | Open-drain output asserted low when LBI falls below threshold; floats or grounds if unused. |
| FB (10) | Feedback reference | Internally tied to 5-V output divider; not user-adjustable - no external resistor network required. |
| GND (11,12) | Analog ground | Reference for FB, PG, LBO; connected to AGND and PGND at single-point star ground. |
| VINA (8) | Analog supply input | Bias rail for internal analog circuits; decoupled with 1-µF capacitor close to pin. |
| AGND (9) | Analog ground | Reference for error amplifier and comparators; tied to GND and thermal pad. |
| Exposed Thermal Pad | Thermal & mechanical anchor | Must be soldered to AGND plane for RθJA = 48.2°C/W and reliable long-term operation. |
Key Features
| Feature | Design Value |
|---|---|
| PFM/PWM hybrid operation | Maintains >85% efficiency down to 100 µA load via automatic light-load PFM entry - critical for battery standby duration. |
| 100% duty cycle capability | Enables dropout operation as low as VOUT – 0.1 V (e.g., 4.9 VIN → 5 VOUT) - supports brownout recovery in wide-input systems. |
| Integrated MOSFETs | Eliminates external high-side/low-side switches and gate drivers - reduces BOM count and layout complexity. |
| Soft-start circuit | Digital ramp limits inrush current during startup; 1-ms typical rise time with 22-µF COUT and 800-mA load - prevents input rail collapse. |
| Power-good (PG) comparator | Monitors regulated 5-V rail with 200-µs delay and 1.6% accuracy - enables safe sequencing of downstream logic/FPGA. |
Applications
| Industrial Handheld Scanners | Point-of-Load Regulation |
|---|---|
Use Scenario: Powering image sensor, laser diode driver, and ARM Cortex-M microcontroller in battery-operated barcode scanners requiring stable 5 V under variable load. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V from 7.4-V dual-cell Li-ion battery; manages dynamic load transients during scan bursts. Use Value: 92% efficiency at 600 mA extends runtime by >15% vs. linear regulators; PFM mode sustains 20 µA IQ during idle scanning intervals. | Use Scenario: Local regulation of 5 V rail from 12-V backplane in programmable logic controllers (PLCs) and industrial I/O modules. IC Role / Device Role / Timing Role: Secondary DC-DC stage providing clean, low-noise 5 V for microcontrollers and communication interfaces (RS-485, CAN). Use Value: 1-MHz switching enables use of small 6.8-µH inductors and 22-µF X7R ceramics - reduces board area by 40% vs. 500-kHz alternatives. |
| Medical Portable Monitors | Embedded Networking Devices |
Use Scenario: Supplying 5 V to display controller, touch interface, and data acquisition ADC in battery-powered patient monitors. IC Role / Device Role / Timing Role: Main power converter with thermal shutdown and PG signaling to ensure safe shutdown before battery depletion. Use Value: Undervoltage lockout (2.8 V) and LBI/LBO support precise battery fuel gauging; PG signal validates rail integrity before system boot. | Use Scenario: Generating 5 V for Ethernet PHY, microcontroller, and PoE interface in compact wireless access points and edge routers. IC Role / Device Role / Timing Role: High-efficiency intermediate regulator converting 12 V from PoE midspan to 5 V for digital subsystems. Use Value: Synchronizable switching frequency avoids beat frequencies with Ethernet clock domains; 1.5-A rating supports burst-mode packet processing. |
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 |
|---|---|---|---|
| TPS62111RSAT | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage. | Used where 3.3-V logic rails dominate (e.g., FPGA I/O banks, USB PHYs) instead of 5-V peripherals. | Select TPS62111RSAT only when system requires 3.3 V - no PCB changes needed due to pin-to-pin compatibility. |
| TPS63020DSJR | Buck-boost topology; 1.8–5.5 V input, 3.3/5.0 V selectable output; higher quiescent current (30 µA). | Supports wide-input battery systems (e.g., single-cell Li-ion 2.5–4.2 V) where input may drop below 5 V. | Choose TPS63020DSJR only when input voltage can fall below 5 V - requires different feedback and compensation design. |
Compared with TPS62112RSAT, TPS62111RSAT offers identical performance at 3.3 V with zero layout change, while TPS63020DSJR trades fixed 5-V simplicity for buck-boost flexibility at the cost of higher IQ and added design complexity.
Availability
TPS62112RSAT is available at Aetrix Electronics and suitable for industrial handheld scanners, point-of-load regulation from 12-V buses, and embedded networking devices requiring stable component supply across production lifecycles.
Supply support for TPS62112RSAT 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 company designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The TPS6211x product line delivers high-efficiency, low-noise synchronous buck conversion for battery-powered and distributed power systems - optimized for compact size, wide input range, and seamless integration into space-constrained designs.
FAQ
What is the maximum output current capability of the TPS62112RSAT?
The TPS62112RSAT delivers up to 1.5 A continuous output current when input voltage is ≥6 V. At lower inputs, current capability decreases: 1.2 A at ≥4.3 V, 500 mA at ≥3.5 V, and 100 mA at ≥3.1 V. These limits are defined by internal MOSFET RDS(on) and thermal constraints - derating is required above 85°C ambient.
Does the TPS62112RSAT require external feedback resistors to set its output voltage?
No, the TPS62112RSAT does not require external feedback resistors. It is a fixed 5-V output device with internal resistor divider connected to the FB pin. The FB pin is not user-accessible for adjustment - connecting external components to FB will disrupt regulation and is not supported per datasheet specifications.
How does the SYNC pin affect the operating mode of the TPS62112RSAT?
When SYNC is pulled high, the TPS62112RSAT operates in forced PWM mode with fixed 1-MHz switching - ideal for noise-sensitive applications. When SYNC is grounded, it enables automatic PFM/PWM mode switching, improving light-load efficiency. An external clock (800–1400 kHz) applied to SYNC overrides both modes and locks switching frequency to the input signal.
Can the TPS62112RSAT operate with an input voltage lower than its 5-V output?
Yes, the TPS62112RSAT supports 100% duty cycle operation, allowing it to maintain regulation with input voltages as low as VOUT – 0.1 V (e.g., 4.9 V input for 5 V output). This enables brownout recovery and extends usable battery range in systems where input voltage sags near end-of-discharge.
What thermal management provisions are built into the TPS62112RSAT?
The TPS62112RSAT includes thermal shutdown at 145°C (typical) and relies on its exposed thermal pad for heat dissipation. With proper PCB layout - including soldering the pad to a minimum 100-mm² AGND copper pour - it achieves RθJA = 48.2°C/W. Junction temperature must remain ≤125°C for continuous operation per recommended conditions.
TPS62112RSAT 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)
TPS62112RSAT FAQ
1.How can I place an order for TPS62112RSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62112RSAT 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 TPS62112RSAT reliable?
The price and inventory of TPS62112RSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62112RSAT is usually 5 days.
3.What payment methods are accepted for TPS62112RSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62112RSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62112RSAT?
TPS62112RSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62112RSAT 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 TPS62112RSAT?
For technical support, including TPS62112RSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62112RSAT requirements.
6.How does Aetrix verify that TPS62112RSAT is sourced from the original manufacturer or authorized distributors?
All TPS62112RSAT 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 TPS62112RSAT meets industry standards.
7.What is the process for return or replacement of TPS62112RSAT?
All TPS62112RSAT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62112RSAT, 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 TPS62112RSAT part is unused and in its original packaging.
Return procedure for TPS62112RSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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