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Texas Instruments TPS61087DSCR
- Part No.:
- TPS61087DSCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS61087DSCR.pdf
- Description:
- IC REG BOOST ADJ 3.2A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,647
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Product details
Overview
TPS61087DSCR from Texas Instruments is a high-frequency, current-mode boost DC-DC converter IC with 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 power rail generation. It delivers 500 mA at 15 V in typical applications using 1.2-MHz switching and 3.3-µH inductor, targeting compact handheld and imaging systems.
For engineers reviewing the TPS61087DSCR datasheet, TPS61087DSCR pinout, TPS61087DSCR application, or TPS61087DSCR equivalent, key selection criteria include selectable 650-kHz/1.2-MHz operation, external compensation for stability tuning, adjustable soft-start via capacitor, thermal shutdown (150°C), and undervoltage lockout (2.4 V).
Technical Context
The TPS61087DSCR operates in current-mode control with quasi-constant frequency and adaptive off-time topology, enabling superior line and load transient response. Its externally compensated error amplifier (gm = 107 µA/V, VFB = 1.238 V) supports flexible loop tuning across varying output capacitance and load conditions.
Switching frequency is selected via FREQ pin: logic low (GND) sets 650 kHz for higher efficiency; logic high (VIN) sets 1.2 MHz for smaller magnetics and faster transients. The device transitions between continuous conduction mode (CCM), discontinuous conduction mode (DCM), and pulse-skipping mode depending on load current and inductor ripple.
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 rails, and dual-AA alkaline (2.4–3.2 V) without pre-regulation. |
| Output Voltage Range | Up to 18.5 V - configurable via external resistor divider (e.g., R1 = 200 kΩ, R2 = 18 kΩ for 15 V), regulated to ±1% over line/load/temperature. |
| Switch Current Limit | 3.2 A (min) - enables ≥500 mA at 15 V output with >90% efficiency using 3.3-µH inductor and SL22 Schottky diode. |
| Switching Frequency | Selectable 650 kHz or 1.2 MHz - determines inductor size (6.8 µH vs. 3.3 µH) and trade-off between light-load efficiency and transient speed. |
| Soft-Start Control | Capacitor-based (e.g., 100 nF on SS pin) - ramps peak switch current from 0 A to full limit over ~10 ms, limiting inrush into output capacitors. |
| Feedback Reference | 1.238 V (±0.6%) - precision bandgap reference enabling accurate output voltage setting with standard 1% resistors. |
| Thermal Shutdown | 150°C activation with 14°C hysteresis - protects against sustained overload or poor PCB thermal design; resumes operation at ~136°C. |
Pinout & Package
TPS61087DSCR uses a 10-pin WSON (DSC) package, 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad (Pin 4, AGND) for enhanced power dissipation. Pin numbering follows top-view counterclockwise layout starting from mark dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 8) | Power input | Accepts 2.5–6 V; requires local 2×10 µF/16 V ceramic input capacitance for ESR < 10 mΩ and low AC impedance. |
| EN (Pin 3) | Enable control | Active-high logic input; pulls device into shutdown (ISDVIN = 1 µA) when grounded; VIH = 2 V min at VIN = 2.5–6 V. |
| SW (Pins 6 & 7) | Power switch node | Drives external inductor; handles peak currents up to 4.8 A; requires low-inductance routing and Kelvin connection to minimize ringing. |
| FB (Pin 2) | Feedback input | Senses output voltage via resistor divider; bias current 0.1 µA enables use of high-value resistors (e.g., 200 kΩ/18 kΩ) with minimal divider loss. |
| FREQ (Pin 9) | Frequency select | Logic-level input: connect to GND for 650 kHz, to IN for 1.2 MHz; internal pull-down ensures default 650 kHz if left floating. |
| AGND (Pins 4 & Thermal Pad) | Analog ground | Reference for FB, COMP, SS, EN, FREQ; must be tied to PGND at single point near IC to avoid noise coupling into error amplifier. |
| COMP (Pin 1) | Error amplifier output | Connects external RC network (e.g., 100 kΩ + 820 pF) to set dominant pole and phase margin; gm = 107 µA/V defines gain slope. |
| SS (Pin 10) | Soft-start control | Sinks constant 10 µA current during startup; voltage ramp (0.3 V → 0.8 V) linearly scales current limit; open = no soft-start. |
| PGND (Pin 5) | Power ground | High-current return path for SW node and internal MOSFET; must be low-impedance copper pour connected directly to thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable soft-start | Capacitor-programmable startup time (e.g., 100 nF → ~10 ms ramp) prevents inrush into large output caps and avoids input brownout. |
| Selectably optimized frequency | 650 kHz for efficiency (≥92% at 500 mA, 15 V out), 1.2 MHz for compactness (3.3 µH inductor, <10 mm² total solution size). |
| External compensation | Full control over loop dynamics via COMP pin RC network - enables stable operation with 4×10 µF/25 V output caps and varied ESR. |
| Integrated 3.2-A switch | 0.13-Ω rDS(on) at 5 V gate drive reduces conduction loss; supports peak loads up to 4.8 A for transient handling without external FET. |
| Robust protection suite | Includes UVLO (2.4 V), thermal shutdown (150°C), and overvoltage detection (FB > 1.275 V) - shuts down SW immediately to protect downstream circuitry. |
Applications
| Handheld GPS Receivers | Digital Still Cameras |
|---|---|
Use Scenario: Powering GPS RF front-end and baseband processor requiring stable 3.3 V and 5 V rails from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary boost regulator generating 5 V from 3.3–4.2 V battery; provides clean, low-noise supply with fast load transient response. Use Value: 1.2-MHz operation enables small 3.3-µH inductor and low-profile 10 µF ceramic caps, reducing board area by >30% vs. 650-kHz designs. |
Use Scenario: Supplying CCD/CMOS image sensor bias (12–15 V) and flash LED driver (up to 18.5 V) in compact camera modules. IC Role / Device Role / Timing Role: High-voltage boost converter delivering regulated 15 V at 500 mA with tight output tolerance (<±1%) under dynamic load steps. Use Value: External compensation allows tuning for low-ESR polymer output caps, minimizing output ripple to <20 mVpp during autofocus motor bursts. |
| TFT LCD Bias Supply | DSL Modem Line Drivers |
Use Scenario: Generating AVDD (12–15 V) and VGH (18.5 V) for active-matrix TFT displays in portable medical monitors and industrial HMIs. IC Role / Device Role / Timing Role: Dual-rail capable boost controller; one TPS61087DSCR per rail with independent feedback dividers and soft-start timing. Use Value: 650-kHz mode improves light-load efficiency (>85% at 10 mA), extending battery life in always-on display applications. |
Use Scenario: Providing ±12 V analog line driver supplies in DSL modems operating from 5 V system rail with strict EMI limits. IC Role / Device Role / Timing Role: Primary boost stage feeding inverting buck-boost or charge-pump stage; requires low EMI and high PSRR. Use Value: Selectable frequency allows optimizing for CISPR-22 Class B emissions: 650 kHz avoids critical 1–30 MHz bands while maintaining efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 5-A switch current, 1.5-MHz max frequency, same 10-pin WSON package but larger 3.5 mm × 3.5 mm footprint. | Supports >1 A output at 15 V; requires larger inductor (e.g., 2.2 µH) and revised compensation due to higher gm (200 µA/V). | Choose for higher output current needs; not pin-compatible - PCB redesign required for thermal pad and trace widths. |
| MAX17062ETA+ | Fixed 1-MHz frequency, integrated 4-A switch, but only 15-V max output and no FREQ pin; uses 16-pin TQFN (4 mm × 4 mm). | Lacks frequency select and soft-start adjustability; feedback reference is 0.6 V, requiring different resistor values for same output voltage. | Choose for simplified design where 15-V ceiling is acceptable and fixed frequency suffices; not drop-in - different pin count and layout. |
Compared with TPS61087DSCR, TPS61088RHLR offers higher current headroom but demands larger board area and revised loop compensation, while MAX17062ETA+ simplifies layout at the cost of reduced output voltage range and inflexible frequency - neither is pin-compatible or functionally identical.
Availability
TPS61087DSCR is available at Aetrix Electronics and suitable for handheld GPS receivers, digital still cameras, TFT LCD bias supplies, and DSL modem line drivers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS61087DSCR 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 robust industrial-grade design.
The TPS61087DSCR belongs to TI's high-frequency boost converter product line, engineered specifically for space-constrained portable electronics needing reliable 15–18.5 V rails from single-cell batteries or low-voltage system supplies.
FAQ
What is the maximum output voltage supported by the TPS61087DSCR?
The TPS61087DSCR supports a maximum output voltage of 18.5 V, as specified in its absolute maximum ratings and verified across temperature and load conditions. This is achieved using an external resistor divider on the FB pin, with the internal 1.238-V reference enabling precise regulation. Output voltages above 18.5 V risk violating the SW pin voltage rating (20 V max) and may trigger overvoltage protection or cause permanent damage.
Can the TPS61087DSCR operate with a 2.3-V input supply?
No - the TPS61087DSCR has a minimum recommended input voltage of 2.5 V per its datasheet's Recommended Operating Conditions. While the absolute maximum rating table lists –0.3 V to 7.0 V for IN, operation below 2.5 V violates guaranteed functionality: UVLO activates at 2.4 V (falling), and the internal bias circuitry cannot sustain stable regulation or current limiting below this threshold. For 2.3-V sources, consider TPS61085 or similar lower-VIN boost converters.
How does the FREQ pin affect efficiency and component selection in the TPS61087DSCR?
The FREQ pin selects between 650 kHz (FREQ = GND) and 1.2 MHz (FREQ = VIN). At 650 kHz, the TPS61087DSCR achieves higher efficiency (e.g., 92% vs. 89% at 500 mA, 15 V out) and permits larger inductors (6.8 µH), reducing core loss and EMI. At 1.2 MHz, it enables smaller 3.3-µH inductors and lower-output-capacitance designs, shrinking solution size but increasing switching loss. Component selection must match the chosen frequency per TI's recommended networks.
What is the purpose of the AGND and PGND pins on the TPS61087DSCR, and how should they be routed?
AGND (Pins 4 and thermal pad) serves as the low-noise analog reference for FB, COMP, SS, EN, and FREQ; PGND (Pin 5) carries high-current return paths for the SW node and internal MOSFET. They must be separated on the PCB except at a single-point star connection near the IC's thermal pad. Mixing AGND and PGND traces causes switching noise to couple into the error amplifier, degrading regulation accuracy and potentially causing instability in the feedback loop.
Does the TPS61087DSCR support automatic pulse-skipping mode at light loads?
Yes - the TPS61087DSCR automatically enters pulse-skipping mode when load current drops sufficiently to cause discontinuous conduction mode (DCM) operation. In this mode, the controller skips switching cycles to maintain output regulation while minimizing quiescent current (IQ = 75–100 µA). This behavior is inherent to its current-mode architecture and requires no external configuration; it improves light-load efficiency without compromising transient response during sudden load steps.
TPS61087DSCR 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)
TPS61087DSCR FAQ
1.How can I place an order for TPS61087DSCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61087DSCR 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 TPS61087DSCR reliable?
The price and inventory of TPS61087DSCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61087DSCR is usually 5 days.
3.What payment methods are accepted for TPS61087DSCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61087DSCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61087DSCR?
TPS61087DSCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61087DSCR 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 TPS61087DSCR?
For technical support, including TPS61087DSCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61087DSCR requirements.
6.How does Aetrix verify that TPS61087DSCR is sourced from the original manufacturer or authorized distributors?
All TPS61087DSCR 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 TPS61087DSCR meets industry standards.
7.What is the process for return or replacement of TPS61087DSCR?
All TPS61087DSCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61087DSCR, 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 TPS61087DSCR part is unused and in its original packaging.
Return procedure for TPS61087DSCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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