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Texas Instruments TPS61040DRVT
- Part No.:
- TPS61040DRVT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61040DRVT.pdf
- Description:
- IC LED DRV RGLTR PWM 350MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
TPS61040DRVT from Texas Instruments is a high-frequency DC-DC boost converter optimized for LCD bias and white LED backlight supplies, featuring 1.8V–6V input range, up to 28V adjustable output, 400mA internal switch current limit, 1MHz max switching frequency, and 28μA typical quiescent current-used in handheld LCD displays requiring compact, battery-efficient voltage boosting.
For engineers reviewing the TPS61040DRVT datasheet, TPS61040DRVT pinout, TPS61040DRVT application, or TPS61040DRVT equivalent, key selection criteria include its WSON-6 package footprint, feedback-based output voltage programming, PFM control for high light-load efficiency, and thermal performance in space-constrained portable designs.
Technical Context
The TPS61040DRVT implements pulse-frequency-modulation (PFM) with constant peak-current control, enabling discontinuous conduction mode (DCM) operation across full load range. Its internal 400mA MOSFET switch features 600mΩ typical RDS(on) at 2.4V input and supports minimum off-time of 400ns and maximum on-time of 6μs.
It integrates undervoltage lockout (1.5V threshold), internal soft-start (two-stage current ramp), thermal shutdown (~168°C), and 1.233V precision feedback reference. The device operates without external compensation and relies on feedforward capacitor (CFF) tuning for stable regulation under varying line/load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 6V - supports single-cell Li-ion (2.7–4.2V), dual-cell NiMH/NiCd (2.4–3.0V), or 3.3V/5V rails. |
| Output Voltage Range | Adjustable up to 28V - set via external resistor divider on FB pin; enables LCD panel bias and LED string drive. |
| Switch Current Limit | 400mA (typical) - defines maximum inductor peak current; determines max output power and ripple in DCM operation. |
| Switching Frequency | Up to 1MHz - allows use of small ceramic inductors (e.g., 4.7–10μH) and low-ESR capacitors for minimal board area. |
| Quiescent Current | 28μA (typical) - ensures >85% efficiency at 1mA load; critical for battery runtime in always-on display bias circuits. |
| Shutdown Current | 1μA (typical) - minimizes battery drain when display is off; EN pin must be actively driven (not floating). |
| Feedback Reference | 1.233V ±2.0% - sets output voltage accuracy; used with R1/R2 divider to achieve precise VOUT = 1.233 × (1 + R1/R2). |
Pinout & Package
TPS61040DRVT uses the DRV (WSON-6) package: 2mm × 2mm × 0.8mm body with exposed thermal pad soldered to PCB ground plane for thermal management. Pin 1 is SW; pin 2 is VIN; pin 3 is EN; pin 4 is FB; pin 5 is NC; pin 6 is GND. Thermal pad is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 6) | Switch node | Connects to inductor and Schottky diode anode; carries high dI/dt switching current; requires short, low-inductance layout. |
| VIN (Pin 2) | Power input | Accepts 1.8–6V supply; requires local 4.7μF ceramic decoupling close to pin for stability and EMI reduction. |
| EN (Pin 3) | Enable control | Active-high logic input; drives device into <1μA shutdown when pulled low; must be terminated to avoid floating. |
| FB (Pin 4) | Feedback input | Senses output voltage via resistor divider; 1μA bias current requires high-impedance divider (R2 ≤ 200kΩ, R1 ≤ 2.2MΩ). |
| GND (Pin 1) | Ground reference | Primary return path for power and signal; connects to thermal pad for heat dissipation and noise immunity. |
| NC (Pin 5) | No connection | Not internally bonded; must remain unconnected; no routing or copper fill required. |
Key Features
| Feature | Design Value |
|---|---|
| PFM peak-current control | Maintains >80% efficiency from 0.1mA to 30mA load; eliminates need for external compensation network. |
| Integrated soft-start | Two-stage current limit ramp (ILIM/4 → ILIM/2 → full) prevents input rail sag during startup in battery-powered systems. |
| Thermal shutdown with hysteresis | Turns off switch at ~168°C junction temperature; resumes operation after ~143°C cooldown; protects against sustained overload. |
| Low-noise feedback architecture | Requires CFF (e.g., 22pF) across upper feedback resistor to suppress double-pulsing and reduce output ripple by >30%. |
| Small-signal stability in DCM | Operates inherently stable in discontinuous conduction mode; supports wide inductor (2.2–47μH) and capacitor (1–10μF) selection without loop compensation. |
Applications
| LCD Bias Supply | White LED Backlight |
|---|---|
Use Scenario: Powering gate-source bias voltages (e.g., +18V/-10V) for TFT-LCD panels in handheld PDAs and digital cameras. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator generating stable high-voltage rail from single-cell battery; regulates via FB pin with 1.233V reference. Use Value: Enables compact, low-quiescent design meeting <30μA standby current targets while delivering 10–20mA at 18V with <1% line regulation. | Use Scenario: Driving parallel strings of white LEDs (3–5V forward, 20mA each) in smartphone or tablet displays. IC Role / Device Role / Timing Role: Constant-voltage boost source; output voltage set to match LED string VF + margin; PFM mode maintains >85% efficiency at dimmed currents. Use Value: Eliminates need for external current-sense resistors or LED driver ICs; reduces BOM count by integrating switch, controller, and protection in 2mm × 2mm WSON. |
| Digital Still Camera | Handheld Internet Audio Player |
Use Scenario: Supplying 12–28V for CCD/CMOS sensor bias, lens actuator drivers, and flash LED charging circuits. IC Role / Device Role / Timing Role: High-efficiency, fast-transient boost stage supporting burst-mode imaging; responds to EN pin toggling for on-demand power activation. Use Value: Delivers 400mA peak current for flash charging within 10ms; achieves >75% efficiency at 100mA load with 10μH inductor and 1μF ceramic output cap. | Use Scenario: Converting 3.3V system rail to 12V for headphone amplifier bias or DAC reference in portable audio devices. IC Role / Device Role / Timing Role: Compact voltage translator; regulated output powers analog front-end stages requiring clean, low-noise high-voltage supply. Use Value: Reduces solution size by >40% vs. discrete boost + LDO; 28μA quiescent current extends playback time in sleep mode between track changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61041DRVT | 250mA switch current limit, higher RDS(on) (750mΩ typ), lower output ripple at light loads | Better suited for <15mA LED strings or low-power LCD bias where peak current demand is limited | Select TPS61041DRVT when optimizing for lowest possible output voltage ripple and smaller inductor size in sub-10mA applications. |
| MAX17064ETA+ | 28V max output, 400mA switch, but uses current-mode PWM (not PFM); 2.5μA shutdown current; 3mm × 3mm TDFN-8 | Higher EMI due to fixed-frequency operation; requires external compensation; better for noise-sensitive analog rails | Choose MAX17064ETA+ only if fixed-frequency switching is required for EMI filtering or synchronization with other system clocks. |
Compared with TPS61041DRVT, the TPS61040DRVT delivers higher peak output current for demanding LCD bias loads; compared with MAX17064ETA+, it offers superior light-load efficiency and simpler layout but lacks PWM clock synchronization capability.
Availability
TPS61040DRVT is available at Aetrix Electronics and suitable for LCD bias supply, white LED backlighting, digital still camera power, handheld internet audio players, and portable medical display systems requiring stable component supply and long-term manufacturability.
Supply support for TPS61040DRVT 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs for industrial, automotive, and consumer applications.
The TPS6104x product line was designed specifically for space-constrained, battery-powered portable electronics requiring efficient, high-voltage DC-DC conversion with minimal external components-targeting LCD bias, LED backlight, and auxiliary rail generation.
FAQ
What is the maximum output voltage supported by the TPS61040DRVT?
The TPS61040DRVT supports an adjustable output voltage range up to 28V, set using an external resistor divider on the FB pin. The internal 1.233V reference voltage and feedback architecture allow precise configuration-for example, 18V output for LCD bias or 12V for LED string drive-while maintaining regulation across input voltage variations from 1.8V to 6V.
How does the TPS61040DRVT achieve high efficiency at light loads?
The TPS61040DRVT achieves high light-load efficiency through its pulse-frequency-modulation (PFM) control scheme and ultra-low 28μA typical quiescent current. In PFM mode, the device skips switching cycles when output demand is low, reducing switching losses. Combined with low RDS(on) (600mΩ typ) and optimized gate drive, this enables >85% efficiency even at 1mA output current-critical for battery life in always-on display applications.
Can the TPS61040DRVT be used with ceramic output capacitors?
Yes, the TPS61040DRVT is fully compatible with ceramic output capacitors. Its PFM control architecture and inherent stability in discontinuous conduction mode eliminate the need for ESR-based damping, allowing use of low-ESR ceramics (e.g., 1μF X7R 25V in 1206 package). This reduces solution size and improves transient response versus tantalum alternatives-verified in TI's typical application circuit with Tayo Yuden TMK316BJ105KL.
What is the purpose of the NC pin on the TPS61040DRVT WSON-6 package?
The NC (No Connect) pin on the TPS61040DRVT WSON-6 package (Pin 5) is not internally bonded and serves no electrical function. It must remain unconnected-no routing, no copper fill, no solder mask opening. Leaving it floating or connecting it to any net may compromise thermal performance or cause unintended coupling; TI's mechanical drawings and layout guidelines explicitly require this pin to be left open.
Does the TPS61040DRVT require an external feedforward capacitor?
Yes, the TPS61040DRVT requires an external feedforward capacitor (CFF) across the upper feedback resistor (R1) to ensure stable regulation and prevent double-pulsing at the SW pin. A typical value is 22pF (as shown in Figure 7-1), calculated based on switching frequency and R1. Omitting CFF increases output voltage ripple by up to 40% and degrades line regulation-TI specifies CFF as mandatory for production designs meeting ripple and regulation specs.
TPS61040DRVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 1.8V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 28V
- Current - Output / Channel:
- 350mA (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS61040DRVT FAQ
1.How can I place an order for TPS61040DRVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040DRVT 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 TPS61040DRVT reliable?
The price and inventory of TPS61040DRVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040DRVT is usually 5 days.
3.What payment methods are accepted for TPS61040DRVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040DRVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040DRVT?
TPS61040DRVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040DRVT 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 TPS61040DRVT?
For technical support, including TPS61040DRVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040DRVT requirements.
6.How does Aetrix verify that TPS61040DRVT is sourced from the original manufacturer or authorized distributors?
All TPS61040DRVT 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 TPS61040DRVT meets industry standards.
7.What is the process for return or replacement of TPS61040DRVT?
All TPS61040DRVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040DRVT, 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 TPS61040DRVT part is unused and in its original packaging.
Return procedure for TPS61040DRVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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