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Texas Instruments TPS62085RLTR
- Part No.:
- TPS62085RLTR
- Manufacturer:
- Texas Instruments
- Package:
- 7-VFDFN
- Datasheet:
-
TPS62085RLTR.pdf
- Description:
- IC REG BUCK ADJ 3A 7VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,324
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Product details
Overview
TPS62085RLTR from Texas Instruments is a 3-A synchronous step-down DC-DC converter with DCS-Control™ topology, 2.5-V to 6.0-V input range, adjustable 0.8-V to VIN output, and hiccup short-circuit protection. It operates at 2.4 MHz PWM mode and enters power save mode at light loads, achieving up to 95% efficiency in battery-powered point-of-load applications.
For engineers reviewing the TPS62085RLTR datasheet, TPS62085RLTR pinout, TPS62085RLTR application, or TPS62085RLTR equivalent, key selection considerations include its 2-mm × 2-mm VSON-7 package, 17-μA quiescent current, 100% duty cycle low-dropout operation, hiccup-mode fault recovery, and integrated power good output for rail sequencing.
Technical Context
The TPS62085RLTR implements DCS-Control™ architecture-combining voltage-mode stability with hysteretic-like transient response-enabling seamless transition between PWM and power save modes without output voltage disturbance. Its fixed 2.4-MHz switching frequency (PWM) and variable-frequency PSM operation maintain high efficiency across 0.001–3 A load range.
It integrates dual MOSFETs with 31-mΩ high-side and 23-mΩ low-side RDS(on), supports 100% duty cycle for minimum dropout, and features internal soft-start (0.8 ms), undervoltage lockout (2.2 V ±200 mV), thermal shutdown (150 °C), and hiccup protection triggered after 32 current-limit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.0 V - supports single-cell Li-ion, Li-polymer, and 2-cell alkaline/NiMH batteries. |
| Output Current | 3 A continuous - delivers full rated current with thermal derating limited by 107.8 °C/W junction-to-ambient resistance. |
| Switching Frequency | 2.4 MHz (PWM mode) - enables use of small 0.47-µH inductors and compact ceramic output capacitors (10–150 µF). |
| Quiescent Current | 17 µA - sustains ultra-low power consumption in standby, critical for battery runtime extension. |
| Feedback Reference | 800 mV ±8 mV - sets output via external resistor divider; enables precise 0.8–VIN adjustable regulation. |
| Power Good Threshold | 95% VOUT rising / 90% VOUT falling - provides reliable rail monitoring and sequencing control for multi-rail systems. |
| Hiccup Protection | 32-cycle latch-off with 66-µs auto-restart - limits fault energy during sustained short circuits while enabling self-recovery. |
Pinout & Package
TPS62085RLTR is housed in a thermally enhanced 2-mm × 2-mm, 7-pin VSON package (RLT suffix) with exposed thermal pad on underside for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control; internal 400-kΩ pulldown ensures safe disable when floating; 1.0-V VIH threshold enables direct MCU GPIO drive. |
| PG (Pin 2) | Open-drain power good | Signals valid output regulation; requires external pullup ≤6 V; sinks ≥1 mA; asserts low if VOUT drops below 90% nominal. |
| FB (Pin 3) | Feedback input | Monitors output via resistor divider; 800-mV reference enables precise adjustable output; leakage <0.1 µA minimizes divider error. |
| VOS (Pin 4) | Output voltage sense | Direct connection to output capacitor improves regulation accuracy and load transient response; enables remote sensing capability. |
| GND (Pin 5) | Power ground | Main return path for high-current switch node and control circuitry; must be connected to low-impedance PCB ground plane. |
| SW (Pin 6) | Switch node | Connects to inductor; carries high di/dt PWM current; requires tight layout with minimal loop area to reduce EMI and voltage spikes. |
| VIN (Pin 7) | Input supply | Accepts 2.5–6.0 V; requires local 10-µF ceramic capacitor placed adjacent to pin for high-frequency decoupling and stability. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <1% load transient deviation and <10-µs recovery with no external compensation required. |
| 100% duty cycle operation | Extends battery life by maintaining regulation down to VIN = VOUT + IOUT×(RDS(on) + DCRL), e.g., ~1.85 V for 1.8-V/3-A output. |
| Output discharge | 260-Ω internal resistor discharges VOUT when EN is low, preventing back-powering of upstream circuitry. |
| Thermal shutdown with hysteresis | Shuts down at 150 °C junction temperature and resumes only after cooling by 20 °C, preventing thermal cycling. |
| Soft-start time | Fixed 0.8-ms monotonic ramp prevents inrush current, supports pre-biased start-up, and avoids undershoot on battery rails. |
Applications
| Battery-Powered Portable Devices | Point-of-Load Regulation |
|---|---|
Use Scenario: Powering FPGA core voltage or microcontroller I/O banks in handheld medical instruments or IoT edge sensors. IC Role / Device Role / Timing Role: Primary 3-A step-down regulator delivering stable 1.2 V or 1.8 V from a single Li-ion cell (2.8–4.2 V). Use Value: 95% peak efficiency and 17-µA quiescent current maximize battery runtime; hiccup protection prevents thermal runaway during accidental shorts. | Use Scenario: Local regulation for high-speed ADC/DAC analog supplies in test equipment or industrial data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, fast-transient POL converter supplying clean 3.3 V or adjustable 0.8–3.3 V rails adjacent to sensitive signal chains. Use Value: DCS-Control™ achieves <10-mV load transient deviation; 2.4-MHz switching allows small 0.47-µH inductors and reduces EMI coupling into analog sections. |
| Processor Core Supplies | Hard Disk Drive Power |
Use Scenario: Supplying configurable core voltage (e.g., 0.95 V, 1.1 V, 1.2 V) to ARM Cortex-A series SoCs in embedded gateways. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting dynamic voltage scaling (DVS) via FB resistor network reconfiguration. Use Value: 0.8-V to VIN adjustability and 1% output accuracy over temperature enable precise DVS compliance; PG output sequences with SoC reset. | Use Scenario: Providing regulated 3.3 V and 1.8 V to HDD spindle motor drivers and SATA interface ICs in NAS enclosures. IC Role / Device Role / Timing Role: Dual-rail POL solution using TPS62085RLTR (adjustable) and TPS62086RLTR (3.3 V fixed) for independent voltage domains. Use Value: Hiccup protection isolates faults during HDD spin-up surges; 100% duty cycle maintains regulation as battery voltage sags under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62086RLTR | Fixed 3.3-V output; no FB resistor divider required; identical package, pinout, and electrical specs otherwise. | Eliminates external feedback components; suited for designs requiring only 3.3 V with no adjustability. | Select when fixed 3.3 V simplifies BOM and layout; not suitable for adjustable or non-3.3-V outputs. |
| TPS62087RLTR | Fixed 1.8-V output; same package, pinout, and performance envelope; differs only in internal feedback reference. | Optimized for 1.8-V digital logic rails; removes need for precision external resistors and associated layout sensitivity. | Choose for dedicated 1.8-V processor/memory supplies where output adjustability is unnecessary. |
Compared with TPS62085RLTR, the TPS62086RLTR and TPS62087RLTR offer identical thermal, transient, and protection behavior but eliminate output adjustability-reducing component count and layout complexity for fixed-voltage use cases, while retaining pin compatibility and PCB footprint.
Availability
TPS62085RLTR is available at Aetrix Electronics and suitable for battery-powered portable devices, point-of-load regulation, and processor core supplies requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.
Supply support for TPS62085RLTR 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 designing analog ICs, embedded processors, and system-on-chip solutions for industrial, automotive, and consumer applications.
The TPS6208x family is engineered for high-efficiency, space-constrained DC-DC conversion in battery-operated and multi-rail embedded systems-emphasizing low quiescent current, fast transient response, and robust fault handling.
FAQ
What is the maximum output current capability of the TPS62085RLTR?
The TPS62085RLTR is rated for 3 A continuous output current under recommended operating conditions (TJ ≤ 125 °C). Actual deliverable current depends on ambient temperature, PCB copper area, and thermal vias under the exposed pad; derating applies above 85 °C ambient due to its 107.8 °C/W θJA.
Does the TPS62085RLTR support pre-biased output startup?
Yes, the TPS62085RLTR supports pre-biased output startup: when enabled, it begins regulating from the existing output voltage rather than forcing a hard ramp from 0 V, preventing reverse current flow into the output capacitor and avoiding disruption to downstream circuitry already powered.
How does hiccup short-circuit protection work in the TPS62085RLTR?
The TPS62085RLTR triggers hiccup protection after 32 consecutive switch current limit events. It then disables switching, activates output discharge via the 260-Ω internal resistor, waits ~66 µs, and automatically attempts restart. This cycle repeats until the fault clears-limiting average power dissipation and preventing thermal damage during sustained shorts.
Can the TPS62085RLTR operate with 100% duty cycle, and what is its benefit?
Yes, the TPS62085RLTR enters 100% duty cycle mode when input voltage approaches output voltage, turning on the high-side FET continuously. This extends usable battery voltage range-for example, sustaining 1.8-V output down to ~1.85 V input-maximizing runtime in single-cell Li-ion applications.
What is the purpose of the VOS pin on the TPS62085RLTR?
The VOS (Voltage Output Sense) pin on the TPS62085RLTR provides Kelvin sensing of the output voltage directly at the capacitor terminals. This compensates for IR drop across PCB traces, improving load regulation accuracy and transient response-especially critical in high-current, low-voltage applications like processor cores.
TPS62085RLTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 7-VFDFN
- 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):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-VSON-HR (2x2)
TPS62085RLTR FAQ
1.How can I place an order for TPS62085RLTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62085RLTR 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 TPS62085RLTR reliable?
The price and inventory of TPS62085RLTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62085RLTR is usually 5 days.
3.What payment methods are accepted for TPS62085RLTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62085RLTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62085RLTR?
TPS62085RLTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62085RLTR 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 TPS62085RLTR?
For technical support, including TPS62085RLTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62085RLTR requirements.
6.How does Aetrix verify that TPS62085RLTR is sourced from the original manufacturer or authorized distributors?
All TPS62085RLTR 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 TPS62085RLTR meets industry standards.
7.What is the process for return or replacement of TPS62085RLTR?
All TPS62085RLTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62085RLTR, 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 TPS62085RLTR part is unused and in its original packaging.
Return procedure for TPS62085RLTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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