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Texas Instruments TPS61140DRCT
- Part No.:
- TPS61140DRCT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61140DRCT.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
TPS61140DRCT from Texas Instruments is a dual-output boost regulator IC designed for clamshell phone OLED/LCD display power management. It delivers up to 27 V on VOUT and regulated current up to 35 mA on IOUT, with integrated 0.7-A N-channel MOSFET and built-in power diode. Its PFM mode (for OLED supply) and 1.2-MHz PWM mode (for WLED backlight) enable high efficiency across load ranges in space-constrained mobile applications.
For engineers reviewing the TPS61140DRCT datasheet, TPS61140DRCT pinout, TPS61140DRCT application, or TPS61140DRCT equivalent, key selection criteria include input-to-output isolation, individually programmable voltage/current outputs via external resistors, short-circuit and overvoltage protection (28 V OVP), soft-start control, and compatibility with 10-pin 3×3 mm QFN packaging for compact PCB layout.
Technical Context
The TPS61140DRCT uses a single-inductor dual-output architecture where one boost stage feeds both a low-dropout linear regulator (LDO) for VOUT and a low-side current sink for IOUT. Feedback selection is dynamic: in BOTH-ON mode, it automatically chooses between V(IOUT)–VOUT and IFB as the regulation signal based on headroom requirements.
Its control logic supports three operating modes-voltage-only (PFM), current-only (1.2-MHz PWM), and simultaneous dual-output (PWM)-with dedicated SELV/SELI pins enabling independent enable/disable and PWM dimming. Built-in thermal shutdown (160°C), undervoltage lockout (1.65 V), and overvoltage protection ensure robust operation in battery-powered handheld systems.
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) and Li-polymer battery inputs without pre-regulation. |
| Max Output Voltage (VOUT) | 27 V - sufficient for driving multi-string WLEDs or high-voltage OLED sub-displays. |
| Max Current Output (IOUT) | 35 mA - LDO and current sink both rated for ≤35 mA, limiting total regulated current regardless of boost capability. |
| Switching Frequency | 1.2 MHz (PWM mode) - enables use of small 10 µH inductors and 4.7 µF ceramic capacitors for minimal footprint. |
| OVP Threshold | 28 V - protects internal 30-V FET and external 25-V output capacitors from overvoltage stress. |
| Efficiency | Up to 82% - achieved at mid-load in PFM mode; higher than typical dual-output discrete solutions due to shared power stage. |
| Soft Start Time | 40 ms - prevents inrush current during startup; disabled during PWM dimming to improve linearity. |
Pinout & Package
TPS61140DRCT is housed in a thermally enhanced 10-pin, 3 mm × 3 mm QFN package with exposed thermal pad soldered to analog ground. Pin functions are validated per TI SLVS624B datasheet (Rev. March 2007).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Power Input | Supplies IC bias and boost converter energy; UVLO triggers below 1.65 V to isolate input from outputs. |
| GND (Pin 8) | Ground Reference | Analog/digital ground node; requires low-impedance connection to input/output capacitor grounds for stability. |
| SW (Pin 6) | Switch Node | Connects to inductor and internal MOSFET drain; high dv/dt node requiring tight layout and minimal trace length. |
| IOUT (Pin 7) | Current Sink Output | Drives WLED anodes; regulated by IFB feedback loop; disconnected from VOUT via internal LDO when SELV = L. |
| VOUT (Pin 1) | Voltage Output | Provides low-noise, low-ripple OLED supply via integrated LDO; PSRR >20 dB suppresses boost ripple at 20 kHz. |
| VFB (Pin 2) | Voltage Feedback | Sets VOUT via resistor divider; regulated to 1.229 V reference; determines output accuracy and load regulation. |
| IFB (Pin 10) | Current Feedback | Return path for current sink; regulated to 330 mV; open-circuit disables IOUT regulation. |
| ISET (Pin 9) | Current Programming | Sets IOUT magnitude via external resistor; KISET = 900 typ. links ISET current to IFB current. |
| SELV (Pin 3) | Voltage Enable | High = enable VOUT; low = disable VOUT and disconnect LDO; internal 300–700 kΩ pull-down ensures safe default. |
| SELI (Pin 4) | Current Enable/Dimming | High = enable IOUT; PWM input = dim WLED brightness; <40 ms pulse width disables soft start for linearity. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor dual-output topology | Reduces BOM count and board area vs. two separate boost converters; eliminates need for second inductor and diode. |
| Integrated 0.7-A MOSFET + power diode | Removes requirement for external active switching components; simplifies design and improves reliability in portable devices. |
| Mode-selectable PFM/PWM control | PFM maximizes light-load efficiency for OLED; 1.2-MHz PWM ensures stable, low-ripple WLED current with fast transient response. |
| Dedicated SELV/SELI pins | Enable independent on/off control and hardware PWM dimming without MCU intervention or software overhead. |
| Built-in protection suite | Includes UVLO, OVP (28 V), thermal shutdown (160°C), short-circuit detection, and soft-start - no external supervision needed. |
Applications
| Clamshell Phone OLED Sub-display | Clamshell Phone WLED LCD Backlight |
|---|---|
Use Scenario: Powering monochrome or color OLED sub-display in flip-phone hinge design with limited PCB real estate. IC Role / Device Role / Timing Role: Provides regulated 15 V DC output via VOUT pin using PFM-controlled boost + LDO for ultra-low noise. Use Value: Achieves <15 mVpp ripple (Figure 9–10) and >80% efficiency at 10 mA load - critical for flicker-free static text rendering. |
Use Scenario: Driving 3–6 series-connected WLEDs for main LCD backlight in same clamshell platform. IC Role / Device Role / Timing Role: Delivers constant current up to 35 mA via IOUT pin using 1.2-MHz PWM-controlled boost stage. Use Value: Supports 20–30 kHz PWM dimming (Figure 11–12) with ±5% linearity - eliminates audible coil whine and enables smooth brightness control. |
| Simultaneous OLED + WLED Operation | Low-Power Handheld Instrument Display |
Use Scenario: Concurrent powering of OLED status panel and WLED-backlit main screen during active UI navigation. IC Role / Device Role / Timing Role: Dynamically selects feedback path (V(IOUT)–VOUT or IFB) to minimize power loss across LDO and current sink. Use Value: Maintains ≥75% system efficiency (Figure 13) despite 4–8 V differential between OLED and WLED forward voltages. |
Use Scenario: Compact battery-powered test equipment requiring isolated, low-noise analog supply and LED indicators. IC Role / Device Role / Timing Role: Supplies clean 12–18 V rail for op-amp references while driving status LEDs via IOUT with dimming. Use Value: Input-to-output isolation and shutdown current <1.5 µA (ISD) extend shelf life and reduce standby drain in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61141DRCT | OVP threshold 22 V (vs. 28 V); identical pinout, package, and functional behavior. | Better suited for 20-V-rated output capacitors or lower-voltage WLED strings; not drop-in for 25-V capacitor designs. | Select TPS61141DRCT only if system-level OVP margin allows 22 V ceiling and 28 V capability is unnecessary. |
| RT9397BF | Single-output WLED driver (no VOUT LDO); 1.3-MHz fixed-frequency PWM; no PFM mode or voltage output capability. | Lacks OLED supply functionality; requires separate voltage regulator for auxiliary displays or sensors. | Choose RT9397BF only when only WLED current drive is needed and board space permits adding discrete voltage regulation. |
Compared with TPS61140DRCT, TPS61141DRCT offers tighter overvoltage protection but sacrifices headroom for high-Vf WLED strings, while RT9397BF reduces integration by omitting the voltage output channel entirely - making TPS61140DRCT the sole option for true dual-rail, single-chip OLED+WLED power in space-constrained clamshell architectures.
Availability
TPS61140DRCT is available at Aetrix Electronics and suitable for clamshell phones, portable medical displays, handheld test instruments, and industrial HMI panels requiring stable component supply with long lifecycle support.
Supply support for TPS61140DRCT 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 battery-powered portable power solutions.
The TPS61140DRCT belongs to TI's display power management product line, engineered specifically for dual-rail (OLED + WLED) power delivery in space- and efficiency-critical mobile consumer electronics.
FAQ
What is the maximum output voltage supported by the TPS61140DRCT?
The TPS61140DRCT supports a maximum output voltage of 27 V on its VOUT pin, with overvoltage protection triggered at 28 V. This rating is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the TI SLVS624B datasheet. The 28 V OVP threshold safeguards the internal 30-V MOSFET and allows use with standard 25-V output capacitors. Exceeding 27 V risks violating regulation accuracy and triggering shutdown.
How does the TPS61140DRCT achieve high efficiency in both OLED and WLED modes?
The TPS61140DRCT achieves high efficiency by using PFM control for OLED voltage output (minimizing switching losses at light loads) and fixed 1.2-MHz PWM for WLED current output (ensuring stable regulation and low ripple). Its single-inductor architecture shares power-stage losses, and the LDO's 2% efficiency penalty at 15 V (per datasheet Section 11) is offset by PFM's >80% efficiency at 10 mA. Measured data shows up to 82% peak efficiency (Figure 2–6).
Can the TPS61140DRCT drive both OLED and WLED outputs simultaneously?
Yes, the TPS61140DRCT supports simultaneous OLED and WLED operation when both SELV and SELI pins are driven high. In this mode, the boost converter dynamically selects feedback between V(IOUT)–VOUT and IFB to minimize power loss across the LDO and current sink. Efficiency depends on the voltage difference between loads - Figure 13 shows stable operation with 4-WLED + OLED at >75% efficiency.
What is the purpose of the IFB pin on the TPS61140DRCT?
The IFB pin on the TPS61140DRCT serves as the return path and regulation node for the current sink circuit. It is regulated to 330 mV (typical), and its voltage determines whether the current sink is active. When IFB drops below 60 mV (V(IFB_L)), the device switches feedback to IFB to maintain current regulation. Opening the IFB path disables IOUT, making it a critical node for WLED current accuracy and fault handling.
Does the TPS61140DRCT require external compensation components?
No, the TPS61140DRCT features internal loop compensation optimized for the recommended external components in the Typical Application circuit - including 10 µH inductor, 4.7 µF input capacitor, and 1 µF/4.7 µF output capacitors. TI specifies that no external compensation is needed when using these values within typical tolerances (±20% inductor, ±10% capacitors), as confirmed in Section 15 of the SLVS624B datasheet.
TPS61140DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 27V
- Current - Output / Channel:
- 35mA
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS61140DRCT FAQ
1.How can I place an order for TPS61140DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61140DRCT 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 TPS61140DRCT reliable?
The price and inventory of TPS61140DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61140DRCT is usually 5 days.
3.What payment methods are accepted for TPS61140DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61140DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61140DRCT?
TPS61140DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61140DRCT 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 TPS61140DRCT?
For technical support, including TPS61140DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61140DRCT requirements.
6.How does Aetrix verify that TPS61140DRCT is sourced from the original manufacturer or authorized distributors?
All TPS61140DRCT 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 TPS61140DRCT meets industry standards.
7.What is the process for return or replacement of TPS61140DRCT?
All TPS61140DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61140DRCT, 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 TPS61140DRCT part is unused and in its original packaging.
Return procedure for TPS61140DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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