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Texas Instruments TPS61087DRCT
- Part No.:
- TPS61087DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61087DRCT.pdf
- Description:
- IC REG BOOST ADJ 3.2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
TPS61087DRCT from Texas Instruments is a high-frequency, current-mode step-up 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 power rail generation. It delivers 500 mA at 15 V from 5-V input in typical applications and features selectable 650-kHz or 1.2-MHz switching frequency, adjustable soft-start, and thermal shutdown protection.
For engineers reviewing the TPS61087DRCT datasheet, TPS61087DRCT pinout, TPS61087DRCT application, or TPS61087DRCT equivalent, key selection considerations include its 10-pin VSON (3.0 × 3.0 mm) package, external compensation capability, FREQ pin-controlled oscillator mode, FB regulation voltage of 1.238 V, and 3.2-A minimum current limit - all critical for compact, high-efficiency boost designs in space-constrained handheld systems.
Technical Context
The TPS61087DRCT operates in current-mode control with quasi-constant frequency and adaptive off-time topology, enabling fast line and load transient response. Its externally compensated error amplifier (gm = 107 µA/V, VFB = 1.238 V) supports stability optimization across varying output capacitance and inductor values.
Switching frequency is selected via the FREQ pin: grounded for 650 kHz (higher efficiency, larger inductors), or tied to VIN for 1.2 MHz (faster transients, smaller passive components). The device transitions between continuous conduction mode (CCM), discontinuous conduction mode (DCM), and pulse-skipping mode depending on load, with undervoltage lockout (2.4 V) and thermal shutdown (150 °C) ensuring robust operation.
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-cell alkaline/NiMH sources 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), enabling TFT LCD bias, white LED strings, or sensor excitation. |
| Switch Current Limit | 3.2 A (min) - enables high peak-power delivery into capacitive loads or during cold-start conditions while maintaining safe SOA. |
| Switching Frequency | Selectable: 650 kHz or 1.2 MHz - determines inductor size (6.8 µH vs. 3.3 µH) and trade-off between efficiency and transient response. |
| Feedback Reference | 1.238 V ± 0.008 V - tight tolerance ensures accurate output regulation; sets output via R1/R2 ratio with minimal divider current error. |
| Quiescent Current | 100 µA (typ) - minimizes battery drain in always-on or low-duty-cycle portable applications. |
| Thermal Shutdown | 150 °C with 14 °C hysteresis - protects against PCB-level overheating during sustained high-load operation or poor thermal layout. |
Pinout & Package
TPS61087DRCT uses a 10-pin VSON (DRC) 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 standard with Pin 1 at top-left corner.
| 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 near package for high-frequency decoupling. |
| EN (Pin 3) | Enable control input | Active-high logic interface; pull to GND disables converter and reduces IN current to 1 µA for system-level power gating. |
| SW (Pins 6 & 7) | Power switch node | Drives external inductor and Schottky diode (e.g., SL22); pins are internally paralleled to reduce resistance and thermal stress. |
| FB (Pin 2) | Feedback input | Monitors output via resistive divider; internal 1.238-V reference sets regulation point - accuracy directly impacts output voltage tolerance. |
| FREQ (Pin 9) | Frequency select input | Logic-level control: connect to GND for 650-kHz operation (efficiency-optimized), or to IN for 1.2-MHz (size-optimized). |
| AGND (Pin 4) | Analog ground reference | Separate from PGND to minimize noise coupling into error amplifier; must be connected to thermal pad and low-impedance ground plane. |
| COMP (Pin 1) | Error amplifier output | External RC network (e.g., 100 kΩ + 820 pF) sets loop compensation - critical for stability under varying load/output cap conditions. |
| SS (Pin 10) | Soft-start control | Connect 100-nF capacitor to GND to ramp current limit linearly; prevents inrush into large output caps or downstream LDOs. |
| PGND (Pin 5) | Power ground return | High-current return path for switch and diode; must be routed separately from AGND and tied at single point near thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable soft-start | Capacitor-controlled ramp of peak switch current (0 A → 3.2 A) over ~10 ms with 100-nF CSS - eliminates input voltage sag and output overshoot at startup. |
| Selectably optimized frequency | 650 kHz or 1.2 MHz via single FREQ pin - enables design flexibility: 650 kHz improves light-load efficiency by ~3%, while 1.2 MHz cuts inductor volume by >40%. |
| External loop compensation | COMP pin provides direct access to transconductance amplifier output - allows precise pole/zero placement for stable operation with 4×10 µF/25 V output caps and varied ESR. |
| Integrated 3.2-A power switch | 0.13-Ω rDS(on) MOSFET rated for 18.5-V output - eliminates need for external high-voltage switch and simplifies BOM for 15-V bias supplies. |
| Robust protection suite | Includes UVLO (2.4 V), thermal shutdown (150 °C), and overvoltage detection (3% above VFB) - prevents damage during brownout, overload, or feedback fault conditions. |
Applications
| Handheld Device Power | TFT LCD Bias Supply |
|---|---|
Use Scenario: Generating 15-V positive and –7-V negative rails from a 3.3-V or 5-V battery source in GPS receivers or digital still cameras. IC Role / Device Role / Timing Role: Primary boost converter providing regulated high-voltage bias for LCD column drivers and gate drivers. Use Value: Enables compact, single-chip solution replacing discrete charge pumps or transformer-based converters - reduces board area by >60% and eliminates magnetic components. |
Use Scenario: Supplying VGH (15–18 V) and VGL (–5 to –8 V) for active-matrix TFT displays in industrial HMIs and medical monitors. IC Role / Device Role / Timing Role: High-efficiency, low-noise positive boost stage; often paired with inverting buck-boost for negative rail. Use Value: Delivers stable 15-V output with <0.11%/A load regulation - maintains consistent display contrast and grayscale fidelity across varying backlight loads. |
| Digital Still Camera Flash | DSL Modem Line Driver |
Use Scenario: Charging a 100-µF flash capacitor to 300 V using a two-stage boost (TPS61087 + flyback), where first stage generates 15 V from 3.3 V. IC Role / Device Role / Timing Role: Intermediate high-current boost stage feeding primary-side controller of isolated flyback converter. Use Value: 3.2-A switch supports rapid capacitor charging cycles (<1 s recharge time) without thermal throttling - meets consumer camera burst-mode requirements. |
Use Scenario: Providing 12–15 V bias to line driver ICs (e.g., THS6012) in ADSL/VDSL modems operating from 5-V USB or wall adapter input. IC Role / Device Role / Timing Role: Efficient, low-EMI boost regulator powering analog front-end amplifiers and DACs. Use Value: 1.2-MHz operation minimizes conducted EMI in telecommunication band (30–300 kHz), easing compliance with FCC Part 15 Class B limits. |
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 VSON package but 2.5-mm × 2.5-mm body. | Supports higher output power (e.g., 18 V @ 1 A) and faster transients; requires re-layout due to smaller footprint and different thermal pad geometry. | Choose when >500 mA at 15 V is required and PCB real estate allows 2.5-mm package; not drop-in compatible with TPS61087DRCT. |
| MAX17062ETA+ | Fixed 1-MHz frequency, 2.5-A switch, integrated Schottky diode, 8-pin µDFN package. | Lacks frequency select and external compensation; limited to lower output currents and fixed compensation - less flexible for custom EMI or stability tuning. | Prefer for cost-sensitive, low-complexity designs where 1-MHz fixed frequency suffices and 2.5-A peak current is adequate. |
Compared with TPS61087DRCT, TPS61088RHLR offers higher current headroom and smaller footprint but demands layout revision, while MAX17062ETA+ sacrifices design flexibility for integration and reduced component count - making TPS61087DRCT optimal for balanced performance, thermal management, and layout reuse in mid-power portable systems.
Availability
TPS61087DRCT is available at Aetrix Electronics and suitable for handheld devices, TFT LCD bias supplies, DSL modem line drivers, and digital still camera power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61087DRCT 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 TPS61087DRCT belongs to TI's high-frequency boost converter product line, designed specifically for portable electronics requiring compact, efficient, and reliable voltage step-up from single-cell batteries or low-voltage rails.
FAQ
What is the maximum output voltage supported by the TPS61087DRCT?
The TPS61087DRCT supports a maximum output voltage of 18.5 V, as specified in its absolute maximum ratings and validated across temperature and load conditions. This limit is enforced by internal overvoltage protection that disables switching if the FB pin voltage exceeds 1.275 V (3% above nominal 1.238 V), preventing damage to downstream circuitry. The TPS61087DRCT achieves this with its integrated 0.13-Ω, 18.5-V-rated MOSFET switch and robust current-mode control architecture.
How does the FREQ pin affect switching frequency and system design in the TPS61087DRCT?
The FREQ pin on the TPS61087DRCT selects between two fixed switching frequencies: grounding the pin sets 650 kHz (optimized for efficiency and lower EMI), while connecting it to VIN selects 1.2 MHz (optimized for smaller inductors and faster transient response). This choice directly impacts external component selection - e.g., 6.8 µH at 650 kHz versus 3.3 µH at 1.2 MHz - and influences thermal performance, PCB area, and output ripple. The TPS61087DRCT's datasheet provides recommended compensation networks for both modes to ensure stability.
Can the TPS61087DRCT operate with a 2.5-V input and deliver 15-V output at 500 mA?
Yes, the TPS61087DRCT is fully specified to operate from a 2.5-V minimum input and deliver 15-V output at up to 500 mA under typical conditions. At 2.5-V input, the duty cycle reaches ~83%, and the device maintains regulation using its 3.2-A current limit and adaptive off-time control. Efficiency drops to ~82% (per Figure 3), but thermal performance remains within limits thanks to the 54.7°C/W junction-to-ambient rating and exposed thermal pad in the VSON package - a key capability confirmed in the TPS61087DRCT's recommended operating conditions table.
What is the purpose of the SS (soft-start) pin on the TPS61087DRCT, and how is it implemented?
The SS pin on the TPS61087DRCT controls a programmable soft-start function that ramps the internal current limit from 0 A to 3.2 A to prevent inrush current during startup. A capacitor (typically 100 nF) connected between SS and GND is charged at 10 µA, producing a ~10-ms ramp time. When EN is asserted, SS begins at 0.3 V and rises to 0.8 V, linearly scaling the peak switch current. This feature is essential for protecting input sources and avoiding output overshoot in the TPS61087DRCT, especially when driving large output capacitors or downstream LDOs.
Does the TPS61087DRCT require external compensation, and why is it important?
Yes, the TPS61087DRCT requires external compensation via the COMP pin because it uses an externally compensated transconductance error amplifier (gm = 107 µA/V). This design allows engineers to tailor loop stability for specific output capacitance, ESR, inductor value, and load dynamics - critical for maintaining phase margin across temperature and manufacturing variation. Recommended networks (e.g., 100 kΩ + 820 pF for 1.2-MHz/15-V operation) are provided in the TPS61087DRCT datasheet, and improper compensation can cause oscillation or poor transient response.
TPS61087DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN 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-VSON (3x3)
TPS61087DRCT FAQ
1.How can I place an order for TPS61087DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61087DRCT 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 TPS61087DRCT reliable?
The price and inventory of TPS61087DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61087DRCT is usually 5 days.
3.What payment methods are accepted for TPS61087DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61087DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61087DRCT?
TPS61087DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61087DRCT 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 TPS61087DRCT?
For technical support, including TPS61087DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61087DRCT requirements.
6.How does Aetrix verify that TPS61087DRCT is sourced from the original manufacturer or authorized distributors?
All TPS61087DRCT 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 TPS61087DRCT meets industry standards.
7.What is the process for return or replacement of TPS61087DRCT?
All TPS61087DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61087DRCT, 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 TPS61087DRCT part is unused and in its original packaging.
Return procedure for TPS61087DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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