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Texas Instruments TPS62135RGXR
- Part No.:
- TPS62135RGXR
- Manufacturer:
- Texas Instruments
- Package:
- 11-VFQFN
- Datasheet:
-
TPS62135RGXR.pdf
- Description:
- IC REG BUCK ADJ 4A 11VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,882
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Product details
Overview
TPS62135RGXR 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 features ±1% output voltage accuracy in PWM mode, 18 µA typical quiescent current, and integrated power good (PG) and soft-start (SS/TR) functions - optimized for high-efficiency POL supplies in battery-powered embedded computers and SSD drives.
For engineers reviewing the TPS62135RGXR datasheet, TPS62135RGXR pinout, TPS62135RGXR application, or TPS62135RGXR equivalent, key selection considerations include its 2.5-MHz forced-PWM switching frequency, active output discharge capability, VQFN-11 (3 mm × 2 mm) package, and support for precise enable sequencing, HICCUP overcurrent protection, and 100% duty-cycle operation down to VIN ≈ VOUT + 15%.
Technical Context
The TPS62135RGXR implements DCS-Control™ - a hybrid regulation topology combining fast comparator-based transient response with internal voltage feedback compensation, enabling seamless transition between PWM and Power Save Mode without output voltage disturbance. Its control loop directly senses output voltage changes and dynamically adjusts on-time while maintaining stable regulation under wide VIN/VOUT/load variations.
It supports dual operating modes via the MODE pin: forced PWM (2.5 MHz nominal) for predictable EMI and tight ripple control, or automatic PWM/PFM with Automatic Efficiency Enhancement (AEE™) for peak efficiency across 1 µA–4 A load range. The device integrates high-side (100–180 mΩ) and low-side (39–67 mΩ) MOSFETs, precision EN threshold (0.77–0.83 V), and open-drain PG with 93–98% VOUT detection window.
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 for FPGA I/O, SoC cores, or SSD controller rails. |
| Output Voltage Range | 0.8 V to 12 V adjustable - set via external resistor divider on FB pin; VSEL/FB2 enables dynamic voltage scaling. |
| Quiescent Current | 18 µA typical - sustains ultra-low standby power in connected-standby systems like mobile PCs. |
| Switching Frequency | 2.5 MHz nominal in forced PWM - allows compact 1-µH inductor and small ceramic output capacitors (≥6 µF). |
| Output Voltage Accuracy | ±1% in PWM mode - ensures stable core voltage under varying load/temperature for sensitive digital loads. |
| Thermal Shutdown | 160 °C with 20 °C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off. |
Pinout & Package
TPS62135RGXR is housed in a thermally enhanced 11-pin VQFN package (3.00 mm × 2.00 mm, 0.5-mm pitch) with exposed thermal pad for efficient heat dissipation in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Logic-level input with 0.77–0.83 V rising threshold; enables user-defined UVLO and precise power-up sequencing. |
| FB (Pin 5) | Feedback voltage input | Connects to resistor divider midpoint; sets output voltage via 0.7-V reference; ±1% accuracy in PWM mode. |
| FB2 (Pin 4) | Secondary feedback switch output | Open-drain output activated by VSEL high; adds parallel resistor to R2 for dynamic VOUT scaling. |
| GND (Pin 3) | Power and signal ground | Primary return path for power switches, control circuitry, and feedback network; must be low-impedance. |
| MODE (Pin 10) | Operating mode select | Pull low for auto PWM/PFM with AEE™; pull high for fixed 2.5-MHz forced PWM - no frequency jitter. |
| PG (Pin 7) | Power good open-drain output | Asserts low when VOUT drops below 93–98% of target; used for rail sequencing and fault indication. |
| VOS (Pin 6) | Output voltage sense | Direct connection to positive output capacitor terminal; improves load regulation and transient response. |
| VIN (Pin 1) | Main power input | Accepts 3–17 V; requires local 10-µF ceramic input capacitor placed adjacent to pin for stability. |
| SW (Pin 2) | Power switch node | Connects to external 1-µH inductor; carries high di/dt switching current - demands short, low-inductance layout. |
| SS/TR (Pin 9) | Soft-start / tracking input | Controls startup ramp time via external capacitor; also supports voltage tracking for multi-rail sequencing. |
| VSEL (Pin 11) | Voltage scaling control | High/low logic input that enables/disables internal FB2-to-GND switch for dual-output-voltage configuration. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines hysteretic speed with voltage-mode stability - achieves <10-µs load transient recovery and <10-mV undershoot with 1-µH inductor. |
| Active output discharge | Integrated 100-Ω discharge path from VOUT to GND during shutdown - prevents floating outputs and enables safe hot-swap. |
| HICCUP overcurrent protection | Repetitive 512-cycle current-limit lockout with 800-µs auto-restart - protects against sustained shorts without latching off. |
| 100% duty-cycle mode | Enables regulation down to VIN ≈ VOUT + 15% - extends runtime in battery-depleted conditions (e.g., 3.3-V output from 3.6-V Li-ion). |
| Adjustable soft-start | Programmable rise time via SS/TR capacitor - eliminates inrush current and prevents input rail collapse during startup. |
Applications
| Mobile Embedded Computers | SSD Power Management |
|---|---|
|
Use Scenario: Powering CPU I/O, memory interfaces, and chipset rails in fanless ultrabooks and 2-in-1 tablets with strict thermal and standby power budgets. IC Role / Device Role: Primary point-of-load regulator converting 12-V or dual-cell Li-ion (8.4 V) to 1.8 V, 3.3 V, or 5 V system rails. Use Value: 18-µA quiescent current and seamless PWM/PFM transition maintain >85% efficiency from 10 µA to 4 A - critical for Windows Connected Standby compliance. |
Use Scenario: Supplying 3.3-V or 1.2-V rails to NAND flash controllers and DRAM buffers in M.2 NVMe SSDs with bursty write workloads. IC Role / Device Role: High-transient-response buck converter handling 0–3-A load steps within 5 µs while minimizing output voltage droop. Use Value: DCS-Control™ delivers <10-mV undershoot at 2-A/µs load step - prevents data corruption and ensures reliable NAND programming cycles. |
| Gaming Console SoC Supplies | Industrial Edge AI Modules |
|
Use Scenario: Delivering clean, tightly regulated 0.85-V core voltage to GPU and CPU SoCs in portable gaming devices with aggressive thermal constraints. IC Role / Device Role: Adjustable 4-A buck converter with VSEL/FB2 for dynamic voltage/frequency scaling (DVFS) during game scene transitions. Use Value: ±1% output accuracy and 2.5-MHz PWM mode ensure stable core voltage under rapid DVFS - preventing timing violations and thermal throttling. |
Use Scenario: Providing isolated, robust 5-V and 3.3-V rails for vision processors and sensor fusion MCUs in factory-floor edge AI gateways. IC Role / Device Role: Main DC-DC regulator accepting wide-input 9–36-V industrial supply and delivering low-noise, high-reliability POL outputs. Use Value: 17-V absolute max input rating, -40°C to +125°C operation, and HICCUP protection ensure uninterrupted uptime in unregulated industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS621351RGXR | No active output discharge; identical pinout, specs, and DCS-Control™; same 4-A rating and 2.5-MHz PWM. | Preferred where output discharge is unnecessary (e.g., non-hot-swap systems); lower BOM cost due to missing discharge FET. | Select TPS621351RGXR if active discharge is not required - reduces solution size and cost without sacrificing performance. |
| TPS62136RGXR | 1-MHz nominal switching frequency; same 4-A rating, VQFN-11 package, and DCS-Control™; includes output discharge. | Better suited for noise-sensitive analog/RF sections where 2.5-MHz switching causes EMI concerns. | Choose TPS62136RGXR when lower switching frequency is needed to ease EMI filtering or reduce inductor core loss at high VIN. |
Compared with TPS62135RGXR, TPS621351RGXR removes active discharge but retains identical regulation accuracy and transient response, while TPS62136RGXR trades higher-frequency operation for improved EMI headroom and lower inductor stress - both offer drop-in compatibility in footprint and basic functionality.
Availability
TPS62135RGXR is available at Aetrix Electronics and suitable for mobile embedded computers, SSD power management, gaming console SoC supplies, and industrial edge AI modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS62135RGXR 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 system-level power architecture.
The TPS62135RGXR belongs to TI's DCS-Control™ synchronous buck converter family, designed specifically for high-density, high-efficiency point-of-load applications in battery-powered and thermally constrained systems - emphasizing ultra-low IQ, fast transient response, and seamless light-load operation.
FAQ
What is the maximum input voltage rating for the TPS62135RGXR?
The TPS62135RGXR has an absolute maximum input voltage rating of 20 V, with recommended operating range from 3 V to 17 V. Exceeding 20 V risks permanent damage per JEDEC stress limits. For reliable 12-V rail operation, the 17-V upper limit provides 5-V margin against transients - consistent with industrial and automotive surge standards.
Does the TPS62135RGXR support dynamic output voltage adjustment during operation?
Yes, the TPS62135RGXR supports real-time output voltage scaling using the VSEL and FB2 pins. When VSEL is driven high, an internal ~10–30-Ω switch connects FB2 to GND, enabling a second resistor in parallel with R2 to increase the feedback divider ratio - allowing two discrete output voltages without external circuitry.
What is the purpose of the VOS pin on the TPS62135RGXR?
The VOS (voltage sense) pin on the TPS62135RGXR provides remote sensing of the output voltage at the load, improving load regulation and transient response. It must be connected directly to the positive terminal of the output capacitor - bypassing PCB trace resistance - to compensate for IR drop and maintain ±1% accuracy under full 4-A load.
How does the TPS62135RGXR handle short-circuit conditions?
The TPS62135RGXR employs HICCUP overcurrent protection: upon detecting 512 consecutive high-side current-limit events, it halts switching for ~800 µs before initiating a new soft-start cycle. This prevents thermal runaway while enabling automatic recovery once the fault clears - distinct from latch-off or foldback schemes used in other converters.
Can the TPS62135RGXR operate with 100% duty cycle, and under what conditions?
Yes, the TPS62135RGXR enters 100% duty-cycle mode when VIN approaches VOUT - specifically when VIN falls to ~15% above VOUT. In this mode, the high-side MOSFET remains continuously on and the low-side FET is disabled, enabling regulation down to minimal input-output differentials - essential for maximizing battery runtime in Li-ion applications.
TPS62135RGXR 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)
TPS62135RGXR FAQ
1.How can I place an order for TPS62135RGXR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62135RGXR 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 TPS62135RGXR reliable?
The price and inventory of TPS62135RGXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62135RGXR is usually 5 days.
3.What payment methods are accepted for TPS62135RGXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62135RGXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62135RGXR?
TPS62135RGXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62135RGXR 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 TPS62135RGXR?
For technical support, including TPS62135RGXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62135RGXR requirements.
6.How does Aetrix verify that TPS62135RGXR is sourced from the original manufacturer or authorized distributors?
All TPS62135RGXR 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 TPS62135RGXR meets industry standards.
7.What is the process for return or replacement of TPS62135RGXR?
All TPS62135RGXR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62135RGXR, 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 TPS62135RGXR part is unused and in its original packaging.
Return procedure for TPS62135RGXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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