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Texas Instruments TPS62091RGTT
- Part No.:
- TPS62091RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS62091RGTT.pdf
- Description:
- IC REG BUCK 3.3V 3A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,637
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Product details
Overview
TPS62091RGTT from Texas Instruments is a 3-A synchronous step-down DC/DC converter with DCS-Control™ topology, fixed 3.3 V output, 2.5 V to 6 V input range, and 2.8 MHz/1.4 MHz selectable switching frequency. It delivers high efficiency (up to 95%) and ultra-low 20 µA quiescent current in power save mode, targeting processor core and I/O rail regulation in space-constrained portable systems.
For engineers reviewing the TPS62091RGTT datasheet, TPS62091RGTT pinout, TPS62091RGTT application, or TPS62091RGTT equivalent, key selection considerations include its QFN-16 (3 mm × 3 mm) package, integrated output discharge, hiccup-mode short-circuit protection, adjustable softstart via external capacitor, and voltage tracking capability for coordinated power sequencing.
Technical Context
The TPS62091RGTT implements DCS-Control™ - a hybrid regulation architecture combining hysteretic response speed with voltage-mode stability - enabling seamless transition between PWM (fixed-frequency, high-load) and power save mode (variable-frequency, light-load) without output disturbance. Its internal charge pump (CP/CN pins) drives the high-side MOSFET gate, supporting low RDS(on) (50 mΩ HS / 40 mΩ LS) and 100% duty cycle operation for minimal dropout.
Functional modes are controlled by dedicated pins: FREQ selects 2.8 MHz (GND) or 1.4 MHz (VIN), EN enables/disables with 400 kΩ pull-down, SS sets softstart time or enables ratiometric voltage tracking, and PG provides open-drain power-good status referenced to output regulation accuracy (±1.4% at 1 A, PWM mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V - eliminates external feedback resistors, reduces BOM count and layout area. |
| Max Output Current | 3 A - supports high-current processor I/O rails and SSD power domains without external current boosting. |
| Input Voltage Range | 2.5 V to 6 V - compatible with single-cell Li-ion (2.7–4.2 V), USB 5 V, and dual-cell configurations. |
| Switching Frequency | 2.8 MHz (FREQ = GND) or 1.4 MHz (FREQ = VIN) - higher frequency enables smaller inductors (e.g., 0.47 µH); lower frequency improves light-load efficiency. |
| Quiescent Current | 20 µA in power save mode - extends battery runtime in standby/sleep states of portable electronics. |
| Feedback Reference | 0.8 V internal reference - enables precise output regulation and simplifies design of adjustable variants (TPS62090). |
| Thermal Shutdown | 150 °C with 20 °C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62091RGTT uses a 16-pin QFN package (RGTT suffix), 3.00 mm × 3.00 mm body size, with exposed thermal pad connected to AGND. The package supports high-power density designs and requires soldering the thermal pad for reliable thermal performance (RθJB = 20 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Power switch node | Connects to inductor and output capacitor; carries high di/dt switching current - requires short, low-inductance routing. |
| 3 FREQ | Frequency select input | Digital control: GND = 2.8 MHz, VIN = 1.4 MHz; internal 400 kΩ pull-down enables default 2.8 MHz if left floating. |
| 4 PG | Open-drain power-good output | Sinks ≤1 mA when VOUT < 90% nominal; high-impedance when regulated - requires external pull-up to valid logic rail ≤VIN. |
| 5 FB | Feedback input | Internally tied to 0.8 V reference; for fixed-output TPS62091RGTT, connect to GND to improve thermal performance. |
| 6 AGND | Analog ground reference | Separate from PGND; must be routed to thermal pad and star-grounded near AVIN/CP/CN to minimize noise coupling. |
| 7 CP / 8 CN | Charge pump flying capacitor terminals | Must connect 10 nF ceramic capacitor between CP and CN; critical for high-side gate drive - no other connections permitted. |
| 9 SS | Softstart/voltage tracking input | Charged with 7.5 µA current; controls startup ramp time or accepts external voltage for coordinated rail tracking. |
| 10 AVIN | Bias supply input | Provides clean internal LDO bias; must be decoupled with ≥1 µF capacitor close to pin. |
| 11,12 PVIN | Main power input | High-current path for input supply; connect directly to bulk input capacitor with low-ESR/ESL layout. |
| 13 EN | Enable input | Active-high logic; internal 400 kΩ pull-down ensures safe disable on power-up - no external resistor needed. |
| 14,15 PGND | Power ground return | Low-impedance return for SW node and power stage; separate from AGND but joined at single point near thermal pad. |
| 16 VOS | Output voltage sense | Direct connection to output rail; enables accurate remote sensing and activates output discharge (200 Ω) during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <10 µs load transient response with <1% undershoot/overshoot while maintaining stable operation across 0–3 A load range. |
| Output discharge function | 200 Ω internal resistor discharges VOUT during disable/UVLO/thermal shutdown - prevents undefined state in multi-rail systems. |
| Hiccup-mode short-circuit protection | Reduces switch current limit to ~1.5 A during startup and triggers 32-cycle shutdown/restart loop on hard shorts - prevents thermal runaway. |
| Adjustable softstart | Capacitor on SS pin sets precise ramp time (e.g., 100 nF ≈ 13 ms); avoids inrush current issues with large output capacitors (>47 µF). |
| Voltage tracking support | SS pin accepts external voltage source to synchronize TPS62091RGTT's 3.3 V ramp with other rails (e.g., 1.8 V core) for controlled sequencing. |
Applications
| Processor Core Supply | SSD Power Management |
|---|---|
Use Scenario: Powers ARM Cortex-A series or x86 Atom processors requiring tightly regulated 3.3 V I/O voltage with fast transient response during burst activity. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering up to 3 A with <10 µs transient recovery and ±1.4% DC accuracy. Use Value: Maintains system stability during CPU frequency scaling; eliminates need for external post-regulation LDOs due to low output ripple (<10 mVpp). | Use Scenario: Supplies 3.3 V to NAND flash controllers and DRAM buffers in M.2 SATA or NVMe SSD modules with strict power sequencing requirements. IC Role / Device Role / Timing Role: Sequenced power rail generator using EN and PG pins to coordinate with 1.2 V core and 1.8 V interface supplies. Use Value: Ensures NAND controller initialization completes before host interface activation - prevents firmware lockup during cold boot. |
| Notebook I/O Rail | Battery-Powered Instrumentation |
Use Scenario: Provides 3.3 V to USB 3.0 PHY, PCIe endpoint logic, and display interface circuitry in ultrabook platforms operating from single-cell Li-ion. IC Role / Device Role / Timing Role: High-efficiency buck converter optimized for 2.7–4.2 V battery input, leveraging 100% duty cycle mode below 3.6 V. Use Value: Extends usable battery capacity by >12% versus standard buck converters - validated at 100 mA load with 2.8 MHz operation. | Use Scenario: Powers microcontroller peripherals (ADC, UART, sensors) in handheld test equipment where standby current and board area are critical constraints. IC Role / Device Role / Timing Role: Always-on power manager with 20 µA quiescent current and integrated output discharge for safe wake-from-sleep transitions. Use Value: Enables >30-day battery life on two AA cells; eliminates external discharge FET and associated control logic. |
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 |
|---|---|---|---|
| TPS62093RGTT | Fixed 1.8 V output; identical pinout, package, and feature set. | Targets core voltage rails instead of I/O rails; requires different output capacitor ESR tuning for optimal transient response. | Select when 1.8 V logic supply is required - no layout change needed, but feedback network and output cap selection differ. |
| TPS62130ARGTR | 3-A, 3–17 V input, 3.3 V fixed; uses voltage-mode control (not DCS-Control™); 2.25 MHz fixed frequency. | Lacks hiccup-mode protection and output discharge; higher IQ (25 µA) and slower transient response (>20 µs). | Choose for wider input range (e.g., 12 V intermediate bus) where DCS-Control™ speed is non-critical and cost is prioritized. |
Compared with TPS62093RGTT, the TPS62091RGTT offers matched mechanical and electrical compatibility but targets distinct voltage domains; versus TPS62130ARGTR, it delivers superior transient performance and integrated safety features at the cost of narrower input range and slightly higher BOM complexity.
Availability
TPS62091RGTT is available at Aetrix Electronics and suitable for notebook I/O rail design, SSD power management, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62091RGTT 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 ICs, with decades of expertise in high-efficiency DC/DC conversion.
The TPS6209x product line was designed specifically for space-constrained, battery-powered applications demanding high efficiency across full load range, fast transient response, and robust protection - exemplified by the TPS62091RGTT's 3.3 V fixed-output variant.
FAQ
What is the recommended inductor value for TPS62091RGTT operating at 2.8 MHz?
The TPS62091RGTT datasheet specifies a 0.47 µH inductor for 2.8 MHz operation with 3.3 V output and 3 A load. This value balances peak current ripple (~30% of IOUT), core loss, and physical size. Using a 0.47 µH shielded power inductor with ≤25 mΩ DCR ensures >92% efficiency at 2 A and maintains DCS-Control™ stability under transient loads.
Does TPS62091RGTT require an external feedback resistor divider?
No. The TPS62091RGTT is a fixed-output 3.3 V variant - its internal feedback network is factory-trimmed and does not require external resistors. Pin 5 (FB) should be connected to AGND for improved thermal performance, as confirmed in the device's Pin Functions table and Electrical Characteristics section.
How does the TPS62091RGTT handle short-circuit conditions?
The TPS62091RGTT employs hiccup-mode short-circuit protection: during a hard short, the switch current limit drops to ~1.5 A, and after 32 consecutive current-limit events, the device halts switching for ~66 µs before restarting. This prevents thermal damage while allowing automatic recovery once the fault clears - a behavior verified in Section 8.3.4 of the SLVSAW2C datasheet.
Can TPS62091RGTT operate with only PVIN powered, or is AVIN mandatory?
Both PVIN and AVIN must be powered. AVIN supplies the internal bias LDO and analog circuitry; omitting AVIN causes functional failure even if PVIN is present. The datasheet's Recommended Operating Conditions table explicitly lists AVIN as a required supply, and Figure 8 shows AVIN decoupling as mandatory in all application schematics.
What is the purpose of the VOS pin on TPS62091RGTT, and how should it be connected?
The VOS pin on TPS62091RGTT serves dual functions: (1) output voltage sensing for regulation accuracy, and (2) enabling the 200 Ω internal discharge path during shutdown. It must be connected directly to the output capacitor's positive terminal - not to a remote point - to ensure accurate sensing and effective discharge. This connection is required per Section 6 (Pin Functions) and Figure 1 in the SLVSAW2C datasheet.
TPS62091RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 16-VFQFN 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):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 2.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS62091RGTT FAQ
1.How can I place an order for TPS62091RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62091RGTT 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 TPS62091RGTT reliable?
The price and inventory of TPS62091RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62091RGTT is usually 5 days.
3.What payment methods are accepted for TPS62091RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62091RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62091RGTT?
TPS62091RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62091RGTT 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 TPS62091RGTT?
For technical support, including TPS62091RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62091RGTT requirements.
6.How does Aetrix verify that TPS62091RGTT is sourced from the original manufacturer or authorized distributors?
All TPS62091RGTT 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 TPS62091RGTT meets industry standards.
7.What is the process for return or replacement of TPS62091RGTT?
All TPS62091RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62091RGTT, 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 TPS62091RGTT part is unused and in its original packaging.
Return procedure for TPS62091RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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