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Texas Instruments TPS61040DRVR
- Part No.:
- TPS61040DRVR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61040DRVR.pdf
- Description:
- IC LED DRV RGLTR PWM 350MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:10,670
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Product details
Overview
TPS61040DRVR from Texas Instruments is a high-frequency, low-quiescent-current DC-DC boost converter in a 2mm × 2mm WSON-6 package, designed for LCD bias and white-LED backlight supplies. It operates from 1.8V to 6V input, delivers up to 28V output, features 400mA internal switch current limit, 28μA typical no-load quiescent current, and supports up to 1MHz switching frequency for compact ceramic-capacitor-based designs.
For engineers reviewing the TPS61040DRVR datasheet, TPS61040DRVR pinout, TPS61040DRVR application, or TPS61040DRVR equivalent, key selection considerations include its 400mA switch current rating (vs. 250mA in TPS61041), WSON-6 thermal performance (RθJA = 83.0°C/W), adjustable feedback reference (1.233V), undervoltage lockout (1.7V typ), and PFM control architecture enabling >85% efficiency at light loads in portable display power systems.
Technical Context
The TPS61040DRVR employs peak-current-controlled pulse-frequency modulation (PFM) with constant on-time limiting (6μs max) and minimum off-time (400ns typ), operating exclusively in discontinuous conduction mode (DCM) across its full load range. Its internal N-channel MOSFET has 600mΩ typical RDS(on) at 2.4V input and 200mA, and integrates soft-start via two-stage current-limit ramp-up (ILIM/4 → ILIM/2 → full ILIM).
Feedback regulation uses a precision 1.233V internal reference with ±25mV tolerance over temperature; line and load regulation depend directly on external resistor divider accuracy and feedforward capacitor (CFF) selection. Thermal shutdown activates at ~168°C with 25°C hysteresis, and undervoltage lockout disables operation below ~1.5V input.
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 | Up to 28V - programmable via external resistor divider; enables LCD bias (15–25V) and LED string drive. |
| Switch Current Limit | 400mA (typ) - defines maximum inductor peak current; determines max output power and ripple in DCM. |
| Quiescent Current | 28μA (typ) - enables >1000-hour battery life in always-on display bias applications with light loading. |
| Shutdown Current | 1μA (typ) - minimizes system standby drain; requires EN pin termination to GND or VIN. |
| Switching Frequency | Up to 1MHz - permits use of ≤10μH inductors and 1μF ceramic output capacitors for ultra-compact layouts. |
| Feedback Reference | 1.233V (±25mV) - sets output voltage via VOUT = 1.233 × (1 + R1/R2); determines accuracy of regulated bias voltage. |
Pinout & Package
TPS61040DRVR is housed in a thermally enhanced 2mm × 2mm × 0.8mm WSON-6 package with exposed thermal pad soldered to PCB ground plane for optimal heat dissipation (RθJB = 52.9°C/W). Pin 5 is NC (no connection); thermal pad is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Power input | Accepts 1.8–6V supply; requires ≥4.7μF low-ESR ceramic decoupling close to pin. |
| SW (Pin 6) | Switch node | Connects to inductor and Schottky diode anode; carries high di/dt; layout critical for EMI and efficiency. |
| FB (Pin 4) | Feedback input | Senses output via resistor divider; high-impedance (1μA bias) - sensitive to noise; requires CFF for stability. |
| EN (Pin 3) | Enable control | Active-high logic; VIH ≥1.3V, VIL ≤0.4V; must be terminated - floating causes undefined operation. |
| GND (Pin 1) | Ground reference | Power and signal return; connects to thermal pad; star grounding recommended near IC. |
| NC (Pin 5) | No connection | Unbonded die pad; must remain unconnected; no routing or copper fill allowed. |
Key Features
| Feature | Design Value |
|---|---|
| PFM peak-current control | Maintains >80% efficiency from 0.1mA to 30mA load without external compensation - ideal for variable-display-brightness systems. |
| Integrated soft-start | Prevents input rail sag during startup by ramping current limit over 512 cycles - eliminates need for external sequencing circuitry. |
| Ultra-low quiescent current | 28μA typical operating IQ enables direct battery connection in always-on LCD bias rails without significant shelf-life impact. |
| Thermally optimized WSON-6 | 83.0°C/W junction-to-ambient resistance allows 300mW+ continuous power dissipation with minimal PCB copper area. |
| Internal UVLO and thermal shutdown | 1.7V UVLO prevents erratic startup at battery end-of-life; 168°C thermal cutoff protects against sustained overload or poor heatsinking. |
Applications
| LCD Bias Supply | White-LED Backlight Drive |
|---|---|
Use Scenario: Generating stable 18–25V bias for small-to-medium TFT-LCD panels in handheld instrumentation or medical displays. IC Role / Device Role / Timing Role: Primary high-voltage DC-DC regulator; provides regulated VP, VCOM, and gate-on/off voltages. Use Value: 400mA switch current supports multi-rail bias generation with single inductor; 1MHz operation enables <3mm² total solution size including passives. |
Use Scenario: Driving 4–6串联 white LEDs (12–24V forward drop) in digital still cameras or portable media players. IC Role / Device Role / Timing Role: Constant-voltage LED supply; regulates output to match series-string VF while maintaining dimming compatibility. Use Value: 28μA quiescent current extends battery runtime during standby; PFM control ensures consistent brightness down to 0.5mA LED current. |
| Digital Still Camera Power | Handheld PC Display Supply |
Use Scenario: Providing 12–20V for CCD/CMOS sensor bias and LCD backlight in compact camera modules. IC Role / Device Role / Timing Role: Dual-role power block - generates both analog sensor rails and digital display rails from shared Li-ion cell. Use Value: Adjustable output and 1.8V min input enable operation across full battery discharge curve (4.2V → 2.8V); WSON-6 footprint saves space in tight camera PCBs. |
Use Scenario: Delivering 15V bias for active-matrix LCDs in PDAs, organizers, and ruggedized handheld PCs. IC Role / Device Role / Timing Role: Main display power IC; interfaces with system PMIC to enable/disable based on display activity state. Use Value: EN pin control allows synchronized power gating with display controller; 1μA shutdown current eliminates leakage path when display is off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61041DRVR | 250mA switch current limit, 750mΩ typical RDS(on), lower output ripple at same inductance | Better suited for low-power LED strings (<15mA) or space-constrained designs where 400mA headroom is unnecessary | Select TPS61041DRVR when output current demand is ≤20mA and lowest possible BOM cost or EMI is prioritized |
| TPS61040DBVR | SOT-23-5 package (2.9mm × 2.8mm), higher RθJA = 205.2°C/W, same electrical specs | Preferred for prototyping or legacy board designs using through-hole or larger-footprint layouts | Choose TPS61040DBVR only when WSON-6 assembly capability is unavailable or thermal requirements permit higher junction rise |
Compared with TPS61041DRVR, the TPS61040DRVR delivers 60% higher switch current for demanding bias rails, while versus TPS61040DBVR it offers 2.5× better thermal performance and 40% smaller footprint - making it optimal for production-volume, thermally constrained portable displays.
Availability
TPS61040DRVR is available at Aetrix Electronics and suitable for LCD bias supply, white-LED backlight drive, and digital still camera power applications requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61040DRVR 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 portable power solutions.
The TPS6104x product line was engineered specifically for ultra-compact, high-voltage boost applications in battery-powered displays - emphasizing low IQ, wide input range, and robust thermal behavior in sub-3mm² packages.
FAQ
What is the maximum output voltage supported by the TPS61040DRVR?
The TPS61040DRVR supports an adjustable output voltage range up to 28V, set via an external resistor divider on the FB pin. This is achieved using the internal 1.233V reference voltage and is validated across the full input range (1.8V–6V) and load conditions. Output voltages above 28V are not supported and may damage the internal switch or violate absolute maximum ratings.
Does the TPS61040DRVR require an external feedforward capacitor (CFF) for stable operation?
Yes, the TPS61040DRVR requires a feedforward capacitor (CFF) across the upper feedback resistor (R1) to prevent double-pulsing and excessive output voltage ripple. Typical values range from 10pF to 22pF depending on inductor value and load; the datasheet recommends starting with 22pF for 10μH inductors. Omitting CFF results in burst-mode behavior and degraded line regulation.
How does the TPS61040DRVR's thermal performance compare between WSON-6 and SOT-23 packages?
The TPS61040DRVR in WSON-6 (DRV) achieves RθJA = 83.0°C/W, while the SOT-23-5 (DBV) version measures 205.2°C/W - a 2.5× improvement. This is due to the exposed thermal pad in DRV, which must be soldered to a PCB ground plane. As a result, TPS61040DRVR sustains ~300mW continuous power at 85°C ambient, versus ~120mW for DBV under identical conditions.
Can the TPS61040DRVR be used to step up 3.3V to 12V for general-purpose logic supply?
Yes, the TPS61040DRVR is explicitly rated for standard 3.3V or 5V to 12V conversion per its official applications list. With proper output capacitor selection (≥1μF ceramic, 25V rating) and inductor sizing (e.g., 4.7–10μH), it delivers stable 12V at up to ~25mA continuous load while maintaining >85% efficiency - suitable for powering low-current logic, sensors, or interface ICs.
What is the purpose of the NC pin (Pin 5) on the TPS61040DRVR WSON-6 package?
Pin 5 on the TPS61040DRVR WSON-6 package is a no-connect (NC) terminal - it is not bonded to the die and serves no electrical function. It must remain unconnected: no traces, vias, or copper pour should contact this pad. Leaving it floating or connecting it risks internal shorting or unpredictable device behavior, as confirmed in TI's official pin-function table.
TPS61040DRVR 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)
TPS61040DRVR FAQ
1.How can I place an order for TPS61040DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040DRVR 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 TPS61040DRVR reliable?
The price and inventory of TPS61040DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040DRVR is usually 5 days.
3.What payment methods are accepted for TPS61040DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040DRVR?
TPS61040DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040DRVR 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 TPS61040DRVR?
For technical support, including TPS61040DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040DRVR requirements.
6.How does Aetrix verify that TPS61040DRVR is sourced from the original manufacturer or authorized distributors?
All TPS61040DRVR 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 TPS61040DRVR meets industry standards.
7.What is the process for return or replacement of TPS61040DRVR?
All TPS61040DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040DRVR, 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 TPS61040DRVR part is unused and in its original packaging.
Return procedure for TPS61040DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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