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Texas Instruments TPS62112RSARG4
- Part No.:
- TPS62112RSARG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS62112RSARG4.pdf
- Description:
- IC REG BUCK 5V 1.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
TPS62112RSARG4 from Texas Instruments is a fixed-output 5-V synchronous step-down DC-DC converter with integrated N- and P-channel MOSFETs, operating from 3.1 V to 17 V input, delivering up to 1.5 A output current, achieving 95% peak efficiency, and featuring PFM/PWM hybrid operation for wide-load efficiency optimization - used in point-of-load regulation for industrial and portable 12-V rail systems.
For engineers reviewing the TPS62112RSARG4 datasheet, TPS62112RSARG4 pinout, TPS62112RSARG4 application, or TPS62112RSARG4 equivalent, key selection criteria include its 5-V fixed output accuracy (±3%), 1-MHz nominal switching frequency, 20-µA quiescent current in PFM mode, thermal shutdown at 145°C, and compatibility with external clock synchronization up to 1.4 MHz.
Technical Context
The TPS62112RSARG4 implements voltage-mode PWM control with input-voltage feedforward, enabling fast line and load transient response using small ceramic capacitors. Its dual-MOSFET synchronous rectification eliminates external diode losses and supports 100% duty cycle for ultra-low dropout operation.
It operates in forced-PWM mode when synchronized externally (SYNC = HIGH) or in automatic PFM/PWM mode when SYNC = GND, dynamically optimizing efficiency across 10 µA–1.5 A load range. Internal soft-start limits inrush current with stepped current limits (300/600/1200 mA), and undervoltage lockout prevents startup below 2.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±3% over full temperature and load range - ensures stable logic supply without external feedback resistors. |
| Input Voltage Range | 3.1 V to 17 V - supports direct connection to 2–4-cell Li-ion batteries or standard 12-V industrial rails. |
| Max Output Current | 1.5 A at VIN ≥ 6 V - sufficient for powering microcontrollers, FPGAs, and interface ICs in compact embedded systems. |
| Switching Frequency | 1 MHz nominal (900–1100 kHz) - enables use of small 6.8-µH inductors and 22-µF ceramic output capacitors. |
| Quiescent Current | 20 µA typical in PFM mode - extends battery life in always-on portable applications. |
| Efficiency Peak | 95% at 600 mA, VIN = 12 V, VOUT = 5 V - minimizes thermal dissipation in space-constrained designs. |
| Thermal Shutdown | 145°C junction temperature - protects device during overload or poor heatsinking conditions. |
Pinout & Package
TPS62112RSARG4 is housed in a 4.00 mm × 4.00 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 (Pins 2,3) | Power input supply | Connects to main input rail (3.1–17 V); requires local 10-µF ceramic decoupling. |
| VINA (Pin 8) | Analog supply input | Provides clean bias for internal reference and comparators; separate from power path to reduce noise coupling. |
| EN (Pin 4) | Enable control input | Logic-high (>1.3 V) enables regulation; logic-low (<0.3 V) reduces supply current to <2 µA - must not be left floating. |
| SYNC (Pin 5) | Frequency synchronization | CMOS-level input; tie to GND for PFM/PWM auto-mode or to external 0.8–1.4 MHz clock for forced PWM and low-noise operation. |
| SW (Pins 14,15) | Power switch node | Drives external 6.8-µH inductor; high dv/dt node requiring tight layout and ground shielding. |
| PGND (Pins 1,16) | Power ground return | Low-impedance return path for high-current switch loop; must be connected directly to inductor and input capacitor ground. |
| AGND (Pin 9) | Analog ground reference | Reference for FB, LBI, PG; connect to PGND and GND at single point near exposed thermal pad. |
| GND (Pins 11,12) | Signal ground | Common reference for EN, SYNC, LBO, PG; tied to AGND and PGND under thermal pad. |
| LBI (Pin 7) | Low-battery monitor input | Accepts resistor-divider from battery; trips at 1.256 V ±1.5% - connect to GND if unused. |
| LBO (Pin 6) | Open-drain low-battery output | Pulled low when LBI < threshold; requires external pullup to VO or other rail ≤17 V. |
| PG (Pin 13) | Open-drain power-good output | Asserts high when VOUT > 98.4% of 5 V; requires 10-kΩ pullup to VOUT for system sequencing. |
| Exposed Thermal Pad | Thermal and electrical ground | Mandatory solder connection to AGND plane; critical for RθJC(bot) = 3.3°C/W and thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET power stage | Eliminates external diode and reduces BOM count; P-channel RDS(ON) = 250 mΩ, N-channel = 200 mΩ at 3.5 V. |
| PFM/PWM hybrid control | Maintains >85% efficiency down to 10 µA load via automatic mode switching - no external control required. |
| 100% duty-cycle capability | Enables dropout as low as 500 mV (e.g., 5.5 V → 5 V), critical for brownout resilience in battery-powered systems. |
| Internal soft-start | Staged 300/600/1200 mA current limits over 750 µs prevent input rail collapse during cold start into large capacitive loads. |
| Undervoltage lockout (UVLO) | Starts only above 3.1 V (typ), shuts down below 2.8 V - avoids erratic operation during battery depletion. |
Applications
| Industrial PLC I/O Module | Portable Medical Monitor |
|---|---|
Use Scenario: Regulating 5 V from a 12-V backplane for isolated digital I/O drivers and ADC reference supplies. IC Role / Device Role / Timing Role: Primary point-of-load converter providing stable 5-V rail with <3% tolerance and fast transient response to digital switching noise. Use Value: 95% efficiency at 1 A reduces heat rise in sealed enclosures; 20-µA quiescent current enables low-power sleep states without rail collapse. | Use Scenario: Powering ARM Cortex-M7 MCU, OLED display controller, and analog front-end from a 3.7-V Li-ion battery with 12-V auxiliary charging rail. IC Role / Device Role / Timing Role: Dual-input buck regulator supporting seamless switchover between battery and adapter, with LBI monitoring battery health. Use Value: 3.1–17 V input range accommodates both battery (3.7 V) and adapter (12 V); PFM mode extends runtime by 30% vs fixed-frequency alternatives. |
| Automotive Infotainment Head Unit | Test & Measurement Handheld Analyzer |
Use Scenario: Generating clean 5-V supply for USB host controller and audio codec in a 12-V automotive environment with load dump transients. IC Role / Device Role / Timing Role: Synchronous buck converter with 1-MHz switching to avoid AM radio band interference and support compact EMI filtering. Use Value: SYNC pin allows synchronization to system clock to eliminate beat frequencies; thermal shutdown protects against under-dash ambient temperatures. | Use Scenario: Providing regulated 5-V rail for FPGA configuration, precision DACs, and touch-screen controller in a battery-operated field tester. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with prebias start-up capability for hot-swap battery replacement without system reset. Use Value: Monotonic prebiased start-up prevents reverse current flow; 16-pin VQFN package enables dense layout on 4-layer PCB with minimal thermal vias. |
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 |
|---|---|---|---|
| TPS62111RSARG4 | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage and FB network. | Used where 3.3-V logic rail is required instead of 5 V - no change to PCB layout or external components beyond output capacitor. | Select when system requires 3.3 V instead of 5 V; same thermal and EMI performance. |
| TPS62130ARGTR | Higher 3-A output current, 2.7–6.5 V input range, different pinout (16-pin WSON), no LBI/LBO, lower quiescent current (17 µA). | Suitable for higher-current 5-V rails but lacks battery monitoring features and cannot replace TPS62112RSARG4 without board redesign. | Choose for cost-sensitive, high-current applications without low-battery detection; not drop-in compatible. |
Compared with TPS62111RSARG4, the TPS62112RSARG4 provides +1.7 V higher output for 5-V peripherals while retaining identical footprint and protection features; versus TPS62130ARGTR, it offers battery supervision and wider input range at the expense of lower max current and slightly higher IQ.
Availability
TPS62112RSARG4 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical monitors, automotive infotainment head units, and test equipment requiring stable component supply with long-term manufacturability.
Supply support for TPS62112RSARG4 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 and embedded processing solutions, with leadership in power management ICs for industrial, automotive, and portable applications.
The TPS6211x product line delivers high-efficiency, low-noise synchronous buck converters optimized for battery-powered and 12-V rail systems requiring reliable point-of-load regulation with integrated protection and supervision features.
FAQ
What is the output voltage tolerance of the TPS62112RSARG4 over temperature and load?
The TPS62112RSARG4 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 effects of line regulation, load regulation, and thermal drift - verified per TI SLVS585E datasheet Rev E.
Can the TPS62112RSARG4 operate with an input voltage below 3.1 V?
No, the TPS62112RSARG4 cannot operate reliably below 3.1 V. Its absolute minimum recommended input voltage is 3.1 V, and undervoltage lockout disables switching below 2.8 V (min). Attempting to operate below 3.1 V risks unstable regulation or failure to start; for sub-3.1-V inputs, consider TI's TPS62864 or similar low-input buck converters.
Does the TPS62112RSARG4 support prebiased output startup?
Yes, the TPS62112RSARG4 supports monotonic prebiased start-up. During startup into a precharged output, the internal control logic prevents the N-channel MOSFET from turning on until the internal soft-start ramp exceeds the prebias voltage - avoiding reverse current flow and ensuring controlled voltage ramp. This behavior is confirmed in Section 9.4.1 of the SLVS585E datasheet.
What is the maximum allowable switching frequency when synchronizing the TPS62112RSARG4 to an external clock?
The TPS62112RSARG4 supports external synchronization from 0.8 MHz to 1.4 MHz, as stated in the "Synchronization" section (9.3.6) and Electrical Characteristics table. Operation above 1.4 MHz is not guaranteed and may cause loss of regulation or increased EMI; the internal oscillator defaults to ~1 MHz if SYNC is unconnected or driven outside this range.
Is the exposed thermal pad on the TPS62112RSARG4 electrically connected, and how must it be handled in layout?
Yes, the exposed thermal pad on the TPS62112RSARG4 is electrically connected to AGND and must be soldered to a dedicated AGND copper pour with ≥4 thermal vias (0.3-mm diameter) to inner ground planes. Per Section 8.4 and Mechanical Information, this connection achieves RθJC(bot) = 3.3°C/W and ensures mechanical reliability - floating or unconnected pads cause thermal runaway and premature failure.
TPS62112RSARG4 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):
- 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)
TPS62112RSARG4 FAQ
1.How can I place an order for TPS62112RSARG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62112RSARG4 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 TPS62112RSARG4 reliable?
The price and inventory of TPS62112RSARG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62112RSARG4 is usually 5 days.
3.What payment methods are accepted for TPS62112RSARG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62112RSARG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62112RSARG4?
TPS62112RSARG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62112RSARG4 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 TPS62112RSARG4?
For technical support, including TPS62112RSARG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62112RSARG4 requirements.
6.How does Aetrix verify that TPS62112RSARG4 is sourced from the original manufacturer or authorized distributors?
All TPS62112RSARG4 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 TPS62112RSARG4 meets industry standards.
7.What is the process for return or replacement of TPS62112RSARG4?
All TPS62112RSARG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62112RSARG4, 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 TPS62112RSARG4 part is unused and in its original packaging.
Return procedure for TPS62112RSARG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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