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Texas Instruments TPS62135RGXT
- Part No.:
- TPS62135RGXT
- Manufacturer:
- Texas Instruments
- Package:
- 11-VFQFN
- Datasheet:
-
TPS62135RGXT.pdf
- Description:
- IC REG BUCK ADJ 4A 11VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS62135RGXT from Texas Instruments is a synchronous step-down DC-DC converter with DCS-Control™ topology, delivering 4-A continuous output current across an input range of 3 V to 17 V and adjustable output voltage from 0.8 V to 12 V. It achieves ±1% output voltage accuracy in PWM mode, operates at 2.5 MHz nominal switching frequency in forced PWM, and features active output discharge - making it ideal for connected-standby power rails in ultra-low-power mobile computers and SSDs.
For engineers reviewing the TPS62135RGXT datasheet, TPS62135RGXT pinout, TPS62135RGXT application, or TPS62135RGXT equivalent, key selection criteria include its 18 µA typical quiescent current, 100% duty-cycle capability for low-VIN operation, integrated power-good (PG) output, and VQFN-11 (3 mm × 2 mm) package with thermal performance optimized for high-density POL designs.
Technical Context
The TPS62135RGXT implements DCS-Control™, a hybrid regulation topology combining fast transient response of hysteretic control with precise DC regulation via voltage feedback. It supports seamless transition between forced PWM (2.5 MHz, fixed-frequency CCM) and automatic PWM/PFM operation with Adaptive Efficiency Enhancement (AEE™), dynamically adjusting on-time based on VIN and VOUT to sustain >90% efficiency from 1 mA to 4 A load.
Its functional architecture includes a precision enable input with 0.8 V rising threshold, open-drain PG output with 93–98% VOUT detection window, dual feedback path (FB + FB2/VSEL) for dynamic voltage scaling, and internal HICCUP overcurrent protection - all implemented within a thermally enhanced 11-pin VQFN package with RθJA = 38.4 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports multi-cell Li-ion batteries and standard 12-V intermediate rails without external pre-regulation. |
| Output Current | 4 A continuous - enables single-chip POL supply for SoCs, FPGAs, or memory subsystems in compact layouts. |
| Output Voltage Accuracy | ±1% in PWM mode - ensures stable core voltage under varying load/temperature, critical for processor rail compliance. |
| Quiescent Current | 18 µA typical - minimizes standby power loss in always-on systems like gaming console suspend states. |
| Switching Frequency | 2.5 MHz nominal (forced PWM) - allows use of small 1-µH inductors and <22-µF ceramic output capacitors for space-constrained designs. |
| Thermal Resistance | RθJA = 38.4 °C/W - enables full 4-A operation at +85°C ambient with minimal PCB copper area (JEDEC 4-layer board). |
| Power Good Threshold | 93–98% of VOUT - provides reliable sequencing signal for downstream logic or PMICs without external monitoring circuitry. |
Pinout & Package
TPS62135RGXT is housed in a 3.00 mm × 2.00 mm, 11-pin VQFN (RGX) package with exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Logic-high (>0.8 V) initiates soft-start; logic-low (<0.7 V) forces shutdown with 1 µA ISD - enables programmable UVLO and power sequencing. |
| FB (Pin 5) | Main feedback input | Connects to resistor divider from VOUT; sets nominal output via 0.7 V reference - defines base regulation point for 0.8–12 V range. |
| FB2 (Pin 4) | Secondary feedback terminal | Open-drain switch to GND when VSEL = high - adds parallel resistor to FB divider, enabling dynamic VOUT scaling during operation. |
| GND (Pin 3) | Power and signal ground | Primary return path for power MOSFETs, control circuitry, and feedback network - must be low-impedance connection to thermal pad. |
| MODE (Pin 10) | Operation mode select | Pull-high forces 2.5 MHz PWM; pull-low enables AEE™-driven PWM/PFM auto-transition - balances efficiency vs. EMI requirements. |
| PG (Pin 7) | Power good indicator | Open-drain output pulled low when VOUT is outside 93–98% window or device is disabled - used for rail sequencing and fault signaling. |
| VOS (Pin 6) | Output voltage sense | Direct connection to output capacitor anode - improves regulation accuracy by compensating for PCB trace IR drop. |
| VIN (Pin 1) | Input power supply | Accepts 3–17 V; requires local 10-µF ceramic capacitor placed adjacent to pin - critical for high-frequency noise suppression. |
| VSEL (Pin 11) | Voltage scaling control | High/low logic selects whether FB2 is activated - enables two-level output voltage (e.g., 1.2 V / 1.35 V) without external switches. |
| SS/TR (Pin 9) | Soft-start/tracking input | Capacitor-to-GND sets ramp time; also accepts external voltage for synchronized startup with other rails - eliminates inrush current issues. |
| SW (Pin 2) | Power switch node | Internal high-side/low-side MOSFET connection - requires tight layout to minimize EMI and switching losses; connects to 1-µH inductor. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (<10 µs recovery from 80% load step) with stable DC regulation - eliminates need for external compensation components. |
| Active output discharge | 100 Ω internal discharge path from VOUT to GND during shutdown - prevents floating outputs and ensures safe power-down in multi-rail systems. |
| 100% duty-cycle mode | Enables regulation down to VIN ≈ VOUT + 15% - extends battery runtime in portable devices operating near end-of-discharge voltage. |
| HICCUP overcurrent protection | Auto-retry short-circuit response with 800 µs restart delay - protects against sustained faults while maintaining system recoverability without manual reset. |
| Adjustable soft-start | Programmable rise time via SS/TR capacitor - prevents input inrush and output overshoot during cold start or hot-plug events. |
Applications
| Mobile Computer Core Rail | Gaming Console GPU Supply |
|---|---|
Use Scenario: Powering ARM-based application processors in thin-and-light laptops requiring deep-sleep current <50 µA and fast wake-up response. IC Role / Device Role / Timing Role: Primary POL regulator delivering 0.8–1.2 V at up to 4 A with ±1% accuracy and <10 µs load transient recovery. Use Value: 18 µA IQ and automatic PWM/PFM mode maintain >85% efficiency at 1 mA load, extending battery life in connected-standby states. |
Use Scenario: Providing dynamic voltage scaling to discrete GPUs in handheld gaming devices with variable thermal headroom. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting real-time VSEL-triggered voltage changes (e.g., 1.05 V → 1.2 V) during performance mode transitions. Use Value: FB2/VSEL interface enables seamless voltage scaling without external MOSFETs or sequencing controllers - reduces BOM count and layout complexity. |
| SSD Controller Power | Industrial Embedded SoC Rail |
Use Scenario: Generating clean 3.3 V or 1.8 V supply for NAND flash controllers in M.2 NVMe SSDs where EMI-sensitive high-speed serial links coexist. IC Role / Device Role / Timing Role: High-frequency (2.5 MHz) synchronous buck minimizing conducted noise; PG output synchronizes firmware initialization with rail stability. Use Value: 2.5 MHz operation allows use of 1-µH inductor and avoids AM radio band interference - critical for certified consumer storage devices. |
Use Scenario: Powering industrial-grade SoCs in programmable logic controllers requiring robust operation across –40°C to +125°C junction temperature. IC Role / Device Role / Timing Role: Main 12-V-to-1.1-V conversion stage with thermal shutdown (160°C) and undervoltage lockout (2.8 V) for wide-input industrial power buses. Use Value: RθJA = 38.4 °C/W and –40°C to +125°C TJ rating enable full 4-A output without derating in sealed enclosures - simplifies thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS621351RGXT | No active output discharge; identical pinout, specs, and DCS-Control™ operation - differs only in discharge functionality. | Suitable where output discharge is unnecessary (e.g., non-sequenced rails); lower cost due to simplified internal structure. | Select TPS621351RGXT if active discharge is not required - same layout, same thermal profile, no redesign needed. |
| TPS62136RGXT | 1 MHz nominal switching frequency; same 4-A rating, 3–17 V input, and VQFN-11 package - optimized for higher efficiency at medium loads. | Better suited for noise-sensitive analog/RF sections where 2.5 MHz switching may interfere; requires larger 2.2-µH inductor. | Choose TPS62136RGXT when EMI constraints outweigh size requirements - retains compatibility with existing PCB footprint but trades frequency for efficiency. |
Compared with TPS62135RGXT, TPS621351RGXT removes active discharge while preserving all regulation and sequencing features, whereas TPS62136RGXT lowers switching frequency to reduce EMI at the expense of inductor size - both offer drop-in-compatible footprints but serve distinct system-level trade-offs.
Availability
TPS62135RGXT is available at Aetrix Electronics and suitable for mobile computing, gaming hardware, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS62135RGXT 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 and automotive-grade reliability.
The TPS62135RGXT belongs to TI's DCS-Control™ synchronous buck converter family, engineered specifically for high-density, low-noise point-of-load applications in portable and always-on electronics where efficiency across ultra-light to full-load conditions is critical.
FAQ
What is the maximum continuous output current of the TPS62135RGXT?
The TPS62135RGXT delivers 4 A continuous output current under recommended operating conditions (TJ ≤ +125°C, proper PCB thermal design). This rating is validated across the full 3 V to 17 V input range and 0.8 V to 12 V output range, with thermal derating applied only above +125°C junction temperature per the datasheet's RθJA = 38.4 °C/W specification.
Does the TPS62135RGXT support dynamic output voltage adjustment during operation?
Yes, the TPS62135RGXT supports real-time output voltage scaling using the VSEL and FB2 pins. When VSEL is driven high, an internal ~20 Ω switch connects FB2 to GND, adding a parallel resistor to the FB divider and increasing VOUT - enabling two-level voltage operation (e.g., 1.2 V / 1.35 V) without external components or firmware intervention.
How does the TPS62135RGXT handle light-load efficiency?
The TPS62135RGXT maintains high light-load efficiency via Automatic Efficiency Enhancement (AEE™) in PWM/PFM mode: when MODE is low, it seamlessly transitions from 2.5 MHz PWM to variable-frequency PFM, reducing switching losses while sustaining >85% efficiency down to 1 mA output current - enabled by its 18 µA typical quiescent current and DCS-Control™ architecture.
What protection features are integrated into the TPS62135RGXT?
The TPS62135RGXT integrates thermal shutdown (160°C trip, 20°C hysteresis), undervoltage lockout (2.8 V rising threshold), HICCUP overcurrent protection (512-cycle fault lockout with auto-restart), and 100% duty-cycle operation for low-VIN regulation. Its PG output also provides fault signaling for external monitoring or sequencing logic.
Is the TPS62135RGXT pin-compatible with other devices in the same family?
Yes, the TPS62135RGXT shares identical 11-pin VQFN (RGX) packaging, pinout, and footprint with TPS621351RGXT, TPS62136RGXT, and TPS621361RGXT - enabling direct substitution in existing layouts. Functional differences (e.g., active discharge, switching frequency) do not affect mechanical or electrical interconnect compatibility.
TPS62135RGXT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 11-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 4A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 11-VQFN-HR (2x3)
TPS62135RGXT FAQ
1.How can I place an order for TPS62135RGXT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62135RGXT 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 TPS62135RGXT reliable?
The price and inventory of TPS62135RGXT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62135RGXT is usually 5 days.
3.What payment methods are accepted for TPS62135RGXT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62135RGXT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62135RGXT?
TPS62135RGXT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62135RGXT 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 TPS62135RGXT?
For technical support, including TPS62135RGXT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62135RGXT requirements.
6.How does Aetrix verify that TPS62135RGXT is sourced from the original manufacturer or authorized distributors?
All TPS62135RGXT 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 TPS62135RGXT meets industry standards.
7.What is the process for return or replacement of TPS62135RGXT?
All TPS62135RGXT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62135RGXT, 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 TPS62135RGXT part is unused and in its original packaging.
Return procedure for TPS62135RGXT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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