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Texas Instruments TPS61040DBVRG4
- Part No.:
- TPS61040DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS61040DBVRG4.pdf
- Description:
- IC LED DRVR RGLTR PWM SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,310
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Product details
Overview
TPS61040DBVRG4 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 - deployed in portable electronics requiring compact, efficient voltage step-up from single-cell Li-Ion or dual-cell NiMH sources.
For engineers reviewing the TPS61040DBVRG4 datasheet, TPS61040DBVRG4 pinout, TPS61040DBVRG4 application, or TPS61040DBVRG4 equivalent, key selection criteria include verified SOT-23-5 package compatibility, confirmed 400mA peak switch current capability, validated feedback reference of 1.233V ±2.0%, and documented thermal performance (RθJA = 205.2°C/W) under industrial ambient conditions.
Technical Context
The TPS61040DBVRG4 employs pulse-frequency-modulation (PFM) with constant peak current control, enabling high efficiency across light-to-moderate loads while operating exclusively in discontinuous conduction mode (DCM). Its internal 400mA current limit and 6μs maximum on-time ensure stable regulation without external compensation.
It integrates undervoltage lockout (1.5V threshold), thermal shutdown (168°C trip, 25°C hysteresis), and soft-start via two-stage current ramp (ILIM/4 → ILIM/2 → full ILIM), all implemented within a monolithic IC using an N-channel MOSFET with 600mΩ typical RDS(on) at 2.4V 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), and regulated 3.3V/5V rails. |
| Output Voltage Range | Adjustable up to 28V - set externally via resistor divider; enables LCD bias (15–25V) and white LED strings (18–22V). |
| 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 capacitors (≥4.7μF input, ≥1μF output) and low-profile inductors (2.2–10μH). |
| Quiescent Current | 28μA typical - enables >1000-hour battery life in always-on LCD bias applications with 10mA load. |
| Feedback Reference | 1.233V ±2.0% - sets output voltage accuracy; requires precision resistors (e.g., 0.5% tolerance) for <±3% VOUT error. |
| Shutdown Current | 1μA typical - reduces system standby power; EN pin must be actively driven (not floating) to guarantee turn-off. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, 1.3mm height, thermally enhanced with exposed pad soldered to GND plane for RθJB = 34.8°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Power input | Accepts 1.8–6V supply; requires local 4.7μF ceramic decoupling; connects directly to battery or LDO output. |
| SW (Pin 1) | Switch node | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode; carries high di/dt pulses. |
| GND (Pin 2) | Ground reference | Power and signal return; must be low-impedance path to minimize noise coupling into FB and EN pins. |
| FB (Pin 3) | Feedback input | High-impedance (1μA bias) node sensing output divider; requires feedforward capacitor (e.g., 22pF) to prevent burst-mode instability. |
| EN (Pin 4) | Enable control | Active-high logic input; VIH ≥1.3V, VIL ≤0.4V; sinking <1μA when pulled low disables converter and reduces IQ to 1μA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | Two-stage current ramp (ILIM/4 → ILIM/2 → full) over 512 cycles prevents input rail sag during startup. |
| Peak current control | Fixed 400mA limit ensures predictable inductor sizing and eliminates need for external compensation network. |
| Low-noise PFM operation | Discontinuous conduction mode minimizes EMI and enables >85% efficiency at 1–10mA loads. |
| Thermal protection | 168°C junction shutdown with 25°C hysteresis prevents damage during sustained overload or poor PCB heatsinking. |
| UVLO with hysteresis | 1.5V turn-on threshold prevents erratic operation near battery depletion; no external components required. |
Applications
| LCD Bias Supply | White LED Backlight |
|---|---|
Use Scenario: Generating 18–25V bias for TFT-LCD gate drivers in handheld PDAs and digital cameras. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator delivering stable high-voltage rail from 3.3V system supply. Use Value: Enables compact design with 10μH inductor and 1μF ceramic output cap; achieves >82% efficiency at 5mA load. | Use Scenario: Powering parallel white LED strings (3–5 LEDs) in smartphone displays. IC Role / Device Role / Timing Role: Constant-voltage source regulating LED string voltage; not current-controlled - requires external current-setting circuitry. Use Value: Supports 18V output at 10mA with <1% line regulation using 22pF feedforward capacitor and 160kΩ/2.2MΩ divider. |
| Digital Still Camera | Handheld PC / PDA |
Use Scenario: Providing 22V bias for CCD sensor analog front-end and flash driver circuits. IC Role / Device Role / Timing Role: High-efficiency boost converter operating from partially discharged Li-Ion cell (2.8–4.0V). Use Value: Delivers 22V @ 8mA with 86% efficiency at 3.6V input; 28μA quiescent current extends standby time. | Use Scenario: Converting 3.3V main rail to 12V for SD card interface level-shifting and peripheral drivers. IC Role / Device Role / Timing Role: Compact, low-noise voltage translator supporting hot-plug detection and bus arbitration signals. Use Value: Achieves 12V output with ±2% accuracy using 1% resistors; SOT-23-5 footprint fits tight layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61041DBVR | 250mA switch current limit, higher RDS(on) (750mΩ typ), same pinout and feedback reference. | Better suited for lower-power LED strings (<5mA) where reduced ripple and smaller inductors are prioritized. | Select TPS61041DBVR only if output current demand is ≤6mA and lower EMI is critical. |
| MAX17064ETA+ | 28V max output, 600mA switch, 2.5V–5.5V input, 2.5MHz switching, different pinout (8-pin TDFN). | Enables higher-frequency designs with smaller magnetics but requires PCB redesign and new layout validation. | Choose MAX17064ETA+ only when >10mA output and <100ns transient response are mandatory. |
Compared with TPS61041DBVR, the TPS61040DBVRG4 delivers 60% higher output current capability and lower conduction loss, while MAX17064ETA+ offers faster regulation at the cost of non-drop-in replacement and increased BOM complexity.
Availability
TPS61040DBVRG4 is available at Aetrix Electronics and suitable for LCD bias supply, white LED backlighting, and portable camera power management requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS61040DBVRG4 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 TPS6104x product line was designed specifically for space-constrained portable devices needing reliable, low-quiescent-current boost conversion for display and sensor bias rails - emphasizing integration, thermal robustness, and ease of layout.
FAQ
What is the maximum output voltage achievable with the TPS61040DBVRG4?
The TPS61040DBVRG4 supports an adjustable output voltage up to 28V, set by an external resistor divider connected to the FB pin. The internal 1.233V reference and feedback architecture allow precise programming - for example, a 160kΩ/2.2MΩ divider yields 18V output. Output stability and ripple performance depend on proper selection of inductor, Schottky diode, and output capacitor per TI's recommended design guidelines.
Does the TPS61040DBVRG4 require external compensation components?
No, the TPS61040DBVRG4 does not require external compensation components. Its peak current-mode PFM control architecture is inherently stable across its full operating range. Stability is maintained through fixed internal current sensing and timing parameters - including 6μs maximum on-time and 400ns minimum off-time - eliminating the need for loop compensation networks or external capacitors on the COMP pin.
Can the TPS61040DBVRG4 operate from a 1.8V input source?
Yes, the TPS61040DBVRG4 is fully specified to operate from 1.8V input, meeting all electrical characteristics down to this minimum. At 1.8V, it delivers regulated output up to 28V with typical efficiency of 72% at 5mA load (VOUT = 18V), enabled by low RDS(on) (600mΩ) and optimized gate drive. Undervoltage lockout activates below 1.5V to prevent malfunction.
What is the purpose of the feedforward capacitor (CFF) in TPS61040DBVRG4 designs?
The feedforward capacitor (CFF) across the upper feedback resistor prevents burst-mode operation and reduces output voltage ripple by providing overdrive to the internal error comparator. For the TPS61040DBVRG4, a typical value is 22pF (as shown in Figure 7-1). Without CFF, the device may generate double pulses at SW, increasing ripple by up to 2× - especially at light loads or low switching frequencies.
Is the TPS61040DBVRG4 pin-compatible with the TPS61041DBVR?
Yes, the TPS61040DBVRG4 and TPS61041DBVR share identical SOT-23-5 (DBV) pinout, footprint, and functional pin assignments (VIN, SW, GND, FB, EN). They differ only in internal current limit (400mA vs 250mA) and RDS(on), making them direct drop-in replacements in layouts where peak current demand does not exceed 250mA - though efficiency and thermal performance will vary accordingly.
TPS61040DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SOT-23-5
TPS61040DBVRG4 FAQ
1.How can I place an order for TPS61040DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040DBVRG4 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 TPS61040DBVRG4 reliable?
The price and inventory of TPS61040DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS61040DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040DBVRG4?
TPS61040DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040DBVRG4 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 TPS61040DBVRG4?
For technical support, including TPS61040DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040DBVRG4 requirements.
6.How does Aetrix verify that TPS61040DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS61040DBVRG4 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 TPS61040DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS61040DBVRG4?
All TPS61040DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040DBVRG4, 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 TPS61040DBVRG4 part is unused and in its original packaging.
Return procedure for TPS61040DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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