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Texas Instruments TPS62087RLTT
- Part No.:
- TPS62087RLTT
- Manufacturer:
- Texas Instruments
- Package:
- 7-VFDFN
- Datasheet:
-
TPS62087RLTT.pdf
- Description:
- IC REG BUCK 1.8V 3A 7VSON
- Quantity:
- Payment:
- Shipping:
Inventory:384
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Product details
Overview
TPS62087RLTT from Texas Instruments is a 3-A synchronous step-down DC-DC converter with fixed 1.8-V output, DCS-Control™ topology, hiccup short-circuit protection, and 2.4-MHz PWM switching frequency. It operates from 2.5 V to 6.0 V input, delivers up to 95% efficiency, and supports battery-powered point-of-load applications requiring stable low-noise rail generation.
For engineers reviewing the TPS62087RLTT datasheet, TPS62087RLTT pinout, TPS62087RLTT application, or TPS62087RLTT equivalent, key selection criteria include its 1.8-V fixed output, 17-μA quiescent current in power save mode, 2-mm × 2-mm VSON-7 package, hiccup-mode fault recovery, and integrated power good signal for system sequencing.
Technical Context
The TPS62087RLTT implements DCS-Control™ architecture-combining voltage-mode stability with hysteretic-like transient response-enabling seamless transition between 2.4-MHz PWM mode (medium/heavy load) and variable-frequency power save mode (light load). Its internal compensation supports 10–150-μF output capacitors without external components.
It integrates high-side (31–56 mΩ) and low-side (23–45 mΩ) MOSFETs, 100% duty-cycle dropout operation, soft-start (0.8 ms), output discharge (260 Ω), and open-drain power good with 90–95% VOUT threshold hysteresis. Thermal shutdown triggers at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.0% (PWM mode, 1-A load); enables direct replacement of LDOs in processor core rails. |
| Input Voltage Range | 2.5 V to 6.0 V - supports single-cell Li-ion, Li-polymer, and dual-cell alkaline/NiMH battery inputs. |
| Switching Frequency | 2.4 MHz nominal (PWM mode) - allows use of sub-1-μH inductors and compact 0805/1206 ceramic capacitors. |
| Quiescent Current | 17 μA - maintains high light-load efficiency in always-on subsystems like real-time clocks or sensor interfaces. |
| Output Current | 3 A continuous - sufficient for ARM Cortex-A/M cores, FPGAs I/O banks, and SSD controller power domains. |
| Package | VSON-7 (2.0 mm × 2.0 mm, 0.5-mm pitch) - thermally enhanced exposed-pad design with 107.8°C/W junction-to-ambient RθJA. |
| Protection Features | Hiccup short-circuit (32-cycle lockout + auto-restart), thermal shutdown (150°C), UVLO (2.2 V ±0.1 V), and output discharge (260 Ω). |
Pinout & Package
The TPS62087RLTT is housed in a thermally optimized 7-pin VSON package (2.0 mm × 2.0 mm, 0.5-mm pitch) with an exposed thermal pad on the bottom side for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic; internal 400-kΩ pulldown ensures safe disable at power-up; <0.7-μA shutdown current. |
| PG (Pin 2) | Open-drain power good output | Asserts high-Z when VOUT ≥95% of 1.8 V; pulls low at ≤90%; requires external pullup ≤6 V for rail sequencing. |
| FB (Pin 3) | Feedback reference node | Internally connected to 1.8-V regulator; must be tied directly to output for fixed-voltage operation. |
| VOS (Pin 4) | Output voltage sense | Direct connection to output capacitor cathode enables accurate remote sensing and fast discharge path during disable. |
| GND (Pin 5) | Power and signal ground | Primary return path for SW, VIN, and control circuitry; connects to exposed thermal pad for thermal conduction. |
| SW (Pin 6) | Power switch node | Drives external LC filter; handles peak currents up to 5.5 A; requires tight layout to minimize EMI and ringing. |
| VIN (Pin 7) | Main input supply | Accepts 2.5–6.0 V; decoupled with ≥10-μF ceramic capacitor placed adjacent to pin for low-impedance AC path. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <10-μs load transient response with <1% output deviation using standard 22-μF X5R/X7R ceramics-no external compensation required. |
| Hiccup short-circuit protection | Locks out after 32 overcurrent events, discharges output via VOS pin, then auto-restarts after 66 μs-prevents thermal runaway during sustained shorts. |
| 100% duty-cycle operation | Maintains regulation down to VIN = VOUT + IOUT × RDS(on)HS - extends runtime in battery systems by utilizing full cell voltage range. |
| Power save mode (PSM) | Reduces switching frequency and quiescent current to 17 μA at light loads while preserving <1% output accuracy and seamless PWM-to-PSM transition. |
| Integrated output discharge | 260-Ω internal resistor activates during EN low, thermal shutdown, or UVLO - prevents floating outputs and ensures controlled power-down sequencing. |
Applications
| Mobile Processor Core Supply | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powers ARM Cortex-M4/M7 or RISC-V MCU cores in portable medical devices with Li-ion battery input. IC Role / Device Role / Timing Role: Primary 1.8-V core rail regulator delivering up to 3 A with <10-μs transient response to CPU burst loads. Use Value: DCS-Control™ and 2.4-MHz switching enable compact 0805-filter design; 17-μA IQ extends battery life in sleep modes. | Use Scenario: Supplies ultra-low-power wireless sensor transceivers (e.g., BLE 5.0, LoRa) in factory-floor condition monitors. IC Role / Device Role / Timing Role: Always-on 1.8-V bias rail supporting sub-100-μA active current and microsecond wake-up timing. Use Value: Hiccup protection prevents latch-up during ESD-induced output shorts; VOS-sensed discharge ensures clean reset behavior. |
| SSD Controller I/O Rail | Automotive Infotainment PMIC Sub-Rail |
Use Scenario: Generates 1.8-V I/O supply for NAND flash controllers in embedded solid-state drives. IC Role / Device Role / Timing Role: High-current, low-noise point-of-load converter with PG signal used to gate downstream logic enable. Use Value: 95% peak efficiency reduces thermal load in sealed enclosures; PG threshold hysteresis prevents false resets during load transients. | Use Scenario: Provides auxiliary 1.8-V rail for display interface ICs (LVDS, MIPI DSI) in automotive head units operating across –40°C to +125°C. IC Role / Device Role / Timing Role: Secondary regulated rail with thermal shutdown (150°C) and UVLO (2.2 V) meeting AEC-Q100 stress requirements. Use Value: VSON-7 package's 17.1°C/W junction-to-board RθJB enables direct thermal coupling to inner copper layers-no heatsink needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62086RLTT | Fixed 3.3-V output; identical package, pinout, and electrical specs except VOUT and FB connection. | Used where 3.3-V logic or interface rails are required instead of 1.8-V core supply. | Select TPS62086RLTT only when system requires 3.3-V output; no changes to PCB layout or external components beyond FB tie-off. |
| TPS62825ARGLT | 1.8-V fixed output, 3-A rating, but uses newer DCS-Control™ v2, 4-MHz switching, and lower 12-μA IQ. | Better suited for space-constrained designs needing higher frequency and lower quiescent current. | TPS62825ARGLT offers improved light-load efficiency and smaller magnetics but requires validation of loop stability with existing output caps. |
Compared with TPS62087RLTT, TPS62086RLTT provides identical functionality at 3.3 V for interface rails, while TPS62825ARGLT delivers higher switching frequency and lower IQ but requires re-optimization of LC filter values and may alter thermal profile under heavy load.
Availability
TPS62087RLTT is available at Aetrix Electronics and suitable for battery-powered portable electronics, industrial sensor nodes, SSD controller power domains, and automotive infotainment subsystems requiring stable component supply and long-term production continuity.
Supply support for TPS62087RLTT 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 specializing in analog, embedded processing, and power management technologies, with decades of leadership in high-efficiency DC-DC conversion.
The TPS6208x family was designed specifically for space-constrained, battery-sensitive applications demanding high efficiency across wide load ranges-from nanoamp sleep currents to multi-amp active bursts-using DCS-Control™ for minimal external components.
FAQ
What is the output voltage tolerance of the TPS62087RLTT under full load?
The TPS62087RLTT delivers 1.8 V with ±1.0% output voltage accuracy at 1-A load in PWM mode and VIN ≥ VOUT + 1 V. At zero load in power save mode, accuracy degrades to ±2.1% due to reduced regulation bandwidth-verified per Section 7.5 of the SLVSB70C datasheet. This tolerance ensures compatibility with 1.8-V I/O standards such as SDIO, eMMC, and low-voltage LVCMOS interfaces.
Does the TPS62087RLTT require external feedback resistors for its 1.8-V output?
No, the TPS62087RLTT does not require external feedback resistors. As a fixed-output variant, its internal resistor divider sets VOUT to 1.8 V; the FB pin must be directly connected to the output node per datasheet Section 6 and Figure 9-5. Adding external resistors would disrupt regulation and void specified accuracy-only adjustable versions like TPS62085RLTT use external R1/R2 networks.
How does hiccup protection work in the TPS62087RLTT during a sustained short circuit?
In the TPS62087RLTT, hiccup protection activates after 32 consecutive switch current limit events (ILIM = 3.7–5.5 A). The device stops switching, discharges the output via the 260-Ω internal resistor connected to VOS, waits ~66 μs, then attempts automatic restart. This cycle repeats until the fault clears-limiting average power dissipation and preventing thermal damage, unlike latch-off or constant-current limiting schemes.
Can the TPS62087RLTT operate with a 2.5-V input and still regulate 1.8-V output at 3-A load?
Yes, the TPS62087RLTT supports 2.5-V input at 3-A load via 100% duty-cycle operation. Under this condition, the high-side FET remains continuously on, minimizing dropout. Minimum input voltage is calculated as VIN,MIN = VOUT + IOUT × RDS(on)HS ≈ 1.8 V + 3 A × 0.056 Ω = 1.97 V-well below 2.5 V. Verified in Section 8.3.2 and Figure 9-5 startup waveforms with VIN = 2.5 V.
What is the purpose of the VOS pin on the TPS62087RLTT, and how must it be connected?
On the TPS62087RLTT, the VOS (voltage output sense) pin provides Kelvin sensing of the output voltage at the capacitor terminal and enables controlled output discharge during disable or fault conditions. It must be connected directly to the cathode of the main output capacitor-never to the SW node or PCB trace-to ensure accurate regulation and activate the 260-Ω discharge path when EN is low, thermal shutdown occurs, or hiccup protection engages.
TPS62087RLTT 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- 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 (2x2)
TPS62087RLTT FAQ
1.How can I place an order for TPS62087RLTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62087RLTT 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 TPS62087RLTT reliable?
The price and inventory of TPS62087RLTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62087RLTT is usually 5 days.
3.What payment methods are accepted for TPS62087RLTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62087RLTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62087RLTT?
TPS62087RLTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62087RLTT 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 TPS62087RLTT?
For technical support, including TPS62087RLTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62087RLTT requirements.
6.How does Aetrix verify that TPS62087RLTT is sourced from the original manufacturer or authorized distributors?
All TPS62087RLTT 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 TPS62087RLTT meets industry standards.
7.What is the process for return or replacement of TPS62087RLTT?
All TPS62087RLTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62087RLTT, 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 TPS62087RLTT part is unused and in its original packaging.
Return procedure for TPS62087RLTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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