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Texas Instruments TPS61040DDCR
- Part No.:
- TPS61040DDCR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS61040DDCR.pdf
- Description:
- IC LED DRV RGLTR PWM SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:810
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Product details
Overview
TPS61040DDCR from Texas Instruments is a high-frequency, low-quiescent-current DC-DC boost converter in SOT-23-5 (DDC) 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 - enabling compact designs for portable battery-powered displays.
For engineers reviewing the TPS61040DDCR datasheet, TPS61040DDCR pinout, TPS61040DDCR application, or TPS61040DDCR equivalent, key selection criteria include its 400mA switch current rating (distinct from TPS61041's 250mA), SOT-23-5 thermal performance (RθJA = 214.7°C/W), adjustable feedback-based regulation, and suitability for space-constrained 1.8–6V input systems requiring stable >12V outputs.
Technical Context
The TPS61040DDCR employs pulse-frequency modulation (PFM) with constant peak-current control to maintain high efficiency across light-to-moderate loads. Its internal 400mA MOSFET switch (RDS(on) = 600–1000 mΩ at 2.4V) and 1.233V precision reference enable accurate output voltage programming via external resistor divider.
It integrates undervoltage lockout (1.5–1.7V threshold), internal soft-start (two-stage current ramp), thermal shutdown (~168°C), and 1μA shutdown current. The device operates exclusively in discontinuous conduction mode (DCM), where switching frequency varies inversely with load - eliminating need for external compensation.
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 FB pin and external resistor divider; enables LCD VPOS/VNEG and LED string biasing. |
| Switch Current Limit | 400mA (typical) - defines maximum deliverable output power; higher than TPS61041, allowing greater load capability. |
| Quiescent Current | 28μA (typical) - enables >1000-hour battery life in standby mode for handheld devices with microamp-level sleep currents. |
| Shutdown Current | 1μA (typical) - minimizes battery drain during system off-state; EN pin must be actively driven low. |
| Switching Frequency | Up to 1MHz - permits use of small ceramic inductors (e.g., 4.7–10μH) and capacitors, reducing PCB area and BOM count. |
| Reference Voltage | 1.233V (±2.0%) - sets output accuracy; FB pin bias current is only 1μA, minimizing divider resistor power loss. |
Pinout & Package
SOT-23-5 (DDC) package: 2.9mm × 2.8mm footprint, 1.3mm height, thermally enhanced leadframe; requires solder pad under exposed copper for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Power input | Accepts 1.8–6V supply; decoupled with ≥4.7μF ceramic capacitor close to pin. |
| SW (Pin 1) | Switch node | Connects to inductor and Schottky diode anode; carries high di/dt; requires short, low-inductance routing. |
| GND (Pin 2) | Ground reference | Primary return path for power and control circuits; tied to thermal pad for thermal management. |
| FB (Pin 3) | Feedback input | Monitors output via resistor divider; 1.233V reference sets VOUT = 1.233 × (1 + R1/R2); sensitive to noise. |
| EN (Pin 4) | Enable control | Active-high logic input; drives high (>1.3V) to operate, low (<0.4V) to shut down; must not float. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Two-stage current ramp (ILIM/4 → ILIM/2 → full) over 512 cycles prevents input rail sag during startup. |
| PFM peak-current control | Self-stabilizing DCM operation eliminates external compensation and maintains >70% efficiency from 0.1mA to 30mA load. |
| Low-noise feedback architecture | 1μA FB bias current and optional feedforward capacitor (CFF) suppress double-pulsing and reduce output ripple. |
| Thermal protection | Integrated junction temperature sensing shuts down MOSFET above ~168°C with 25°C hysteresis; protects against sustained overload. |
| Undervoltage lockout (UVLO) | Disables switching below 1.5–1.7V input, preventing erratic behavior during battery depletion or cold start. |
Applications
| LCD Bias Supply | White-LED Backlight |
|---|---|
|
Use Scenario: Powering segmented or monochrome LCD panels in handheld PDAs and industrial HMIs requiring ±15V bias rails. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator generating stable high-voltage bias from single-cell battery. Use Value: Enables compact, low-component-count design using 10μH inductor and 1μF ceramic output capacitor; achieves <1% line regulation with CFF tuning. |
Use Scenario: Driving parallel white-LED strings in portable media players and digital cameras with variable brightness control. IC Role / Device Role / Timing Role: Constant-voltage LED driver with analog dimming via FB pin voltage scaling. Use Value: Delivers up to 28V at 10–20mA per string with <15mV output ripple; 28μA quiescent current extends playback time between charges. |
| Digital Still Camera | Handheld PCs & Organizers |
|
Use Scenario: Supplying CCD/CMOS sensor bias and flash LED charging circuitry in compact camera modules. IC Role / Device Role / Timing Role: Dual-role boost converter - generates 18V for sensor bias and 5V auxiliary rail via secondary LDO. Use Value: Supports fast startup (<5ms) and burst-mode operation; 1MHz switching avoids audible noise in image capture sequence. |
Use Scenario: Providing regulated 12–18V rails for memory card interfaces, touch controller AVDD, and display drivers in legacy PDA platforms. IC Role / Device Role / Timing Role: Main high-efficiency boost stage in multi-rail PMIC subsystem. Use Value: Maintains >82% efficiency at 5mA load - critical for all-day battery life; 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 |
|---|---|---|---|
| TPS61041DDCR | 250mA switch current limit, higher RDS(on) (750–1250 mΩ), identical pinout and package. | Better suited for lower-power LED strings or low-current LCD bias where reduced ripple and smaller inductor size are prioritized. | Select TPS61041DDCR when output current ≤15mA and board space is constrained; avoid for >20mA loads requiring TPS61040DDCR's 400mA headroom. |
| MT3608ES5 | 3A switch current, wider 2–24V input range, but no integrated UVLO or soft-start; requires external compensation. | Used in cost-sensitive consumer electronics where higher output current and flexibility outweigh need for integrated protection features. | Choose MT3608ES5 only if external components (compensation network, UVLO circuit) are acceptable; TPS61040DDCR offers plug-and-play reliability with fewer BOM items. |
Compared with TPS61041DDCR, the TPS61040DDCR delivers 60% higher switch current for increased output power without changing PCB layout; versus MT3608ES5, it trades raw current capability for integrated safety features, lower quiescent current, and guaranteed stability - making it preferable for battery-critical portable instrumentation.
Availability
TPS61040DDCR is available at Aetrix Electronics and suitable for LCD bias supply, white-LED backlighting, and digital still camera power management requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS61040DDCR 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 battery-powered system design.
The TPS6104x product line was engineered specifically for ultra-low-power, space-constrained portable display and imaging applications - emphasizing minimal external component count, robust startup behavior, and seamless integration with single-cell battery sources.
FAQ
What is the maximum output voltage achievable with the TPS61040DDCR?
The TPS61040DDCR supports an adjustable output voltage range up to 28V, set by the external feedback resistor divider connected to the FB pin. This is achieved using the internal 1.233V reference voltage, where VOUT = 1.233 × (1 + R1/R2). Output voltages beyond 28V are not supported due to absolute maximum switch voltage rating of 30V and internal circuit limitations.
How does the TPS61040DDCR differ from the TPS61041DDCR in practical design?
The TPS61040DDCR features a 400mA internal switch current limit versus 250mA for the TPS61041DDCR, enabling higher output power and better performance under heavier loads. It also has lower RDS(on) (600–1000 mΩ vs. 750–1250 mΩ), resulting in improved efficiency at mid-to-high loads. Both share identical pinout, package, and control architecture.
Can the TPS61040DDCR operate from a 1.5V alkaline battery?
No - the TPS61040DDCR has a minimum operating input voltage of 1.8V and an undervoltage lockout threshold of 1.5–1.7V. A fresh alkaline cell starts at ~1.6V and drops rapidly; therefore, it cannot reliably power the TPS61040DDCR. Use only with Li-ion (2.7–4.2V), NiMH/NiCd (2.4–3.0V), or regulated 3.3V/5V supplies.
What is the role of the feedforward capacitor (CFF) in the TPS61040DDCR circuit?
The feedforward capacitor (CFF) across the upper feedback resistor suppresses double-pulsing on the SW pin by providing transient overdrive to the error amplifier. Without CFF, the TPS61040DDCR may exhibit pulse bursting, increasing output voltage ripple. Typical values range from 10pF to 22pF; larger values improve ripple but degrade line regulation.
Does the TPS61040DDCR require an external Schottky diode?
Yes - the TPS61040DDCR does not integrate a synchronous rectifier. An external Schottky diode (e.g., MBR0530) must be connected between the SW pin and output capacitor to complete the boost power path. Diode selection must consider forward voltage (<0.4V), reverse recovery time, and peak reverse voltage rating ≥30V.
TPS61040DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- SOT-23-THIN
TPS61040DDCR FAQ
1.How can I place an order for TPS61040DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040DDCR 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 TPS61040DDCR reliable?
The price and inventory of TPS61040DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040DDCR is usually 5 days.
3.What payment methods are accepted for TPS61040DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040DDCR?
TPS61040DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040DDCR 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 TPS61040DDCR?
For technical support, including TPS61040DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040DDCR requirements.
6.How does Aetrix verify that TPS61040DDCR is sourced from the original manufacturer or authorized distributors?
All TPS61040DDCR 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 TPS61040DDCR meets industry standards.
7.What is the process for return or replacement of TPS61040DDCR?
All TPS61040DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040DDCR, 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 TPS61040DDCR part is unused and in its original packaging.
Return procedure for TPS61040DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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