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Texas Instruments TPS61087DSCT
- Part No.:
- TPS61087DSCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS61087DSCT.pdf
- Description:
- IC REG BOOST ADJ 3.2A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:397
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Product details
Overview
TPS61087DSCT from Texas Instruments is a high-frequency, current-mode boost DC-DC converter with an integrated 3.2-A/0.13-Ω N-channel MOSFET switch, supporting 2.5–6-V input and up to 18.5-V output for portable TFT LCD bias, GPS receivers, and DSL modem power rails.
For engineers reviewing the TPS61087DSCT datasheet, TPS61087DSCT pinout, TPS61087DSCT application, or TPS61087DSCT equivalent, key selection criteria include selectable 650-kHz/1.2-MHz switching frequency, external compensation for stability tuning, adjustable soft-start via SS pin, thermal shutdown at 150°C, and undervoltage lockout at 2.4 V.
Technical Context
The TPS61087DSCT operates in current-mode control with quasi-constant frequency and adaptive off-time topology, enabling superior line/load transient response. It supports continuous conduction mode (CCM) above half-inductor ripple current and transitions to discontinuous conduction mode (DCM) or pulse-skipping at light loads.
Frequency selection is implemented via FREQ pin logic level: GND sets 650 kHz for higher efficiency; IN sets 1.2 MHz for smaller magnetics and lower output ripple. The FB pin regulates output using a precise 1.238-V internal reference, while COMP provides access to the transconductance error amplifier (gm = 107 µA/V) for loop compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V), 3.3-V rail, or dual-AA alkaline (2.5–3.2 V) without pre-regulation |
| Output Voltage Range | Up to 18.5 V - sufficient for TFT LCD gate drivers, white LED strings, or DSL line interface supplies |
| Switch Current Limit | 3.2 A min - enables ≥500 mA output at 15 V with typical 90% efficiency and 3.3-µH inductor |
| Switching Frequency | Selectable 650 kHz / 1.2 MHz - trade-off between efficiency (low-freq) and component size/transient response (high-freq) |
| Feedback Reference | 1.238 V ±0.008 V - tight tolerance enables accurate output voltage setting with standard resistor dividers |
| Quiescent Current | 100 µA typ - minimizes battery drain in always-on portable systems during standby |
| Thermal Shutdown | 150°C activation with 14°C hysteresis - protects IC and PCB during overload or poor heatsinking |
Pinout & Package
TPS61087DSCT uses a 10-pin WSON (DSC) package, 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad (Pin 4) for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 8) | Input supply connection | Accepts 2.5–6 V; requires local 2×10 µF/16 V ceramic input capacitance for low ESR and high-frequency decoupling |
| EN (Pin 3) | Enable control input | Active-high logic; pull to VIN ≥2 V to enable; <0.5 V disables with 1-µA shutdown current |
| SW (Pins 6,7) | Power switch node | Drives external inductor; must route with short, wide traces to minimize ringing and EMI |
| FB (Pin 2) | Voltage feedback input | Senses output via resistor divider; 0.1-µA bias current enables high-impedance divider design |
| FREQ (Pin 9) | Frequency select input | GND = 650 kHz; VIN = 1.2 MHz - determines inductor size, capacitor count, and efficiency vs. transient trade-off |
| AGND (Pin 4) | Analog ground reference | Separate from PGND; connects to quiet ground plane under IC for noise-sensitive feedback path |
| COMP (Pin 1) | Error amplifier output | External RC network (e.g., 100 kΩ + 820 pF) sets loop bandwidth and phase margin |
| SS (Pin 10) | Soft-start control | Capacitor (e.g., 100 nF) ramps peak switch current from 0 A to 3.2 A, limiting inrush into output caps |
| PGND (Pin 5) | Power ground return | High-current return path for SW and internal MOSFET; ties to thermal pad and low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable soft-start | External capacitor on SS pin controls ramp time of peak switch current, preventing input voltage sag and output overshoot at startup |
| Selectable switching frequency | 650 kHz or 1.2 MHz selection via FREQ pin enables optimization for either efficiency (larger inductors) or compactness (smaller LC components) |
| External loop compensation | COMP pin exposes error amplifier output, allowing custom Type-II or Type-III compensation for stable operation across wide load/input ranges |
| Integrated 3.2-A power switch | 0.13-Ω RDS(on) MOSFET eliminates external switch, reducing BOM count and layout complexity for space-constrained portable designs |
| Robust protection suite | Includes undervoltage lockout (2.4 V), thermal shutdown (150°C), and overvoltage detection (3% above 1.238 V on FB) for reliable field operation |
Applications
| TFT LCD Bias Supply | GPS Receiver Power |
|---|---|
Use Scenario: Generating AVDD (12–18 V) and VGH (15–18.5 V) rails for active-matrix TFT displays in handheld navigation devices. IC Role / Device Role / Timing Role: Primary boost regulator delivering regulated high-voltage bias from single-cell Li-ion battery. Use Value: Enables compact, efficient high-voltage generation without transformers or charge pumps; 1.2-MHz mode allows use of 3.3-µH inductor and minimal footprint. | Use Scenario: Providing clean, stable 3.3-V or 5-V supply to GPS baseband ICs and RF front-end modules in automotive or portable trackers. IC Role / Device Role / Timing Role: Input-supply booster maintaining regulated output during battery voltage sag below 3.0 V. Use Value: Sustains GPS lock under dynamic load and low-battery conditions; 650-kHz mode improves light-load efficiency critical for long battery life. |
| Digital Still Camera Flash Driver | DSL Modem Line Interface |
Use Scenario: Charging high-voltage capacitors (≥300 V) for xenon flash circuits via multi-stage boost architecture. IC Role / Device Role / Timing Role: First-stage high-current boost converter stepping battery voltage to intermediate 12–15 V rail. Use Value: 3.2-A switch current supports rapid capacitor charging; soft-start prevents camera MCU reset during flash prep. | Use Scenario: Generating ±12 V or +15 V bias for analog line drivers and SLICs in residential DSL modems. IC Role / Device Role / Timing Role: Isolated or non-isolated boost stage powering line interface circuitry from 3.3-V or 5-V system rail. Use Value: High 18.5-V output headroom accommodates voltage drops across protection circuits and filters; thermal shutdown ensures reliability in enclosed modems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Same 10-pin WSON package; higher 5-A switch current; 1.5-MHz max frequency; tighter 1.212-V FB reference | Supports >1-A output at 15 V; better suited for high-power portable audio or industrial sensors | Choose when higher output current or improved reference accuracy is required; verify layout compatibility with larger thermal pad |
| MAX17222ETA+ | 6-pin µDFN; fixed 1.2-MHz frequency; 1.2-A switch; no FREQ/COMP/SS pins; integrated compensation | Targeted at ultra-compact, cost-sensitive applications with fixed 5-V or 12-V output; no external tuning capability | Choose for simplified design with minimal external components; not suitable where adjustable frequency, soft-start, or loop tuning is needed |
Compared with TPS61087DSCT, TPS61088RHLR offers higher current capability and precision but requires revalidation of compensation and thermal layout, while MAX17222ETA+ sacrifices configurability for size and BOM reduction-making TPS61087DSCT optimal for mid-power, tunable boost applications requiring design flexibility.
Availability
TPS61087DSCT is available at Aetrix Electronics and suitable for TFT LCD bias supplies, GPS receiver power rails, DSL modem line interfaces, digital still camera flash drivers, and portable medical device auxiliary rails requiring stable component supply and long-term manufacturability.
Supply support for TPS61087DSCT 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 TPS61087 belongs to TI's high-current boost converter product line, designed specifically for portable and battery-powered systems needing compact, efficient, and configurable high-voltage generation from low-input sources.
FAQ
What input voltage range does the TPS61087DSCT support?
The TPS61087DSCT supports an input voltage range of 2.5 V to 6 V, covering single-cell Li-ion (3.0–4.2 V), 3.3-V system rails, and dual-AA alkaline (2.5–3.2 V) sources. Operation below 2.5 V is prevented by undervoltage lockout at 2.4 V, ensuring reliable startup and regulation across its specified range. This makes the TPS61087DSCT well-suited for portable electronics where battery voltage varies significantly during discharge.
How does the FREQ pin affect TPS61087DSCT performance?
The FREQ pin on the TPS61087DSCT selects between two switching frequencies: grounding FREQ sets 650 kHz for higher efficiency and lower EMI, while connecting it to IN sets 1.2 MHz for faster transient response and smaller external components. The choice directly impacts inductor size (6.8 µH vs. 3.3 µH), output capacitor count, and light-load efficiency. This dual-frequency capability allows designers to optimize the TPS61087DSCT for either battery life or board area depending on application priorities.
Can the TPS61087DSCT generate 15 V output from a 3.3-V input?
Yes, the TPS61087DSCT can generate 15 V from a 3.3-V input. With a minimum input of 2.5 V and maximum output of 18.5 V, it meets this requirement. Using the recommended 6.8-µH inductor at 650 kHz and proper compensation (e.g., 51 kΩ + 1.5 nF), the TPS61087DSCT delivers up to ~400 mA at 15 V from 3.3 V with >85% efficiency. Output voltage is set via FB resistor divider, and soft-start (SS pin) prevents inrush stress during startup.
What is the purpose of the COMP pin on the TPS61087DSCT?
The COMP pin on the TPS61087DSCT is the output of the internal transconductance error amplifier (gm = 107 µA/V), providing direct access to the control loop for external compensation. Connecting an RC network (e.g., 100 kΩ + 820 pF) between COMP and AGND stabilizes the feedback loop across operating conditions. This external compensation enables designers to tailor phase margin and bandwidth for specific inductor/capacitor combinations and load profiles-critical for robust performance in variable-output or high-transient applications using the TPS61087DSCT.
Does the TPS61087DSCT include built-in protection features?
Yes, the TPS61087DSCT integrates multiple protection features: undervoltage lockout (UVLO) activates below 2.4 V to prevent erratic operation; thermal shutdown triggers at 150°C junction temperature with 14°C hysteresis; overvoltage detection halts switching if FB exceeds 1.275 V (3% above 1.238 V); and current limiting restricts peak switch current to ≥3.2 A. These protections ensure safe, reliable operation in real-world conditions without requiring external supervision circuitry for the TPS61087DSCT.
TPS61087DSCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 18.5V
- Current - Output:
- 3.2A (Switch)
- Frequency - Switching:
- 650kHz, 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
TPS61087DSCT FAQ
1.How can I place an order for TPS61087DSCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61087DSCT 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 TPS61087DSCT reliable?
The price and inventory of TPS61087DSCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61087DSCT is usually 5 days.
3.What payment methods are accepted for TPS61087DSCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61087DSCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61087DSCT?
TPS61087DSCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61087DSCT 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 TPS61087DSCT?
For technical support, including TPS61087DSCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61087DSCT requirements.
6.How does Aetrix verify that TPS61087DSCT is sourced from the original manufacturer or authorized distributors?
All TPS61087DSCT 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 TPS61087DSCT meets industry standards.
7.What is the process for return or replacement of TPS61087DSCT?
All TPS61087DSCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61087DSCT, 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 TPS61087DSCT part is unused and in its original packaging.
Return procedure for TPS61087DSCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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