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Texas Instruments TPS61040QDBVRQ1
- Part No.:
- TPS61040QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS61040QDBVRQ1.pdf
- Description:
- IC LED DRVR RGLTR 400MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,765
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Product details
Overview
TPS61040QDBVRQ1 from Texas Instruments is an automotive-grade DC-DC boost converter IC in SOT-23-5 package, designed to generate up to 28 V output from 1.8–6 V input with 400-mA internal switch current limit, 1-MHz max switching frequency, and 28-µA typical quiescent current. It serves as a compact high-efficiency voltage booster for LCD bias and white-LED backlight supplies in ADAS and infotainment systems.
For engineers reviewing the TPS61040QDBVRQ1 datasheet, TPS61040QDBVRQ1 pinout, TPS61040QDBVRQ1 application, or TPS61040QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, adjustable output voltage range, PFM control architecture, thermal shutdown behavior, and compatibility with ceramic output capacitors in space-constrained automotive modules.
Technical Context
The TPS61040QDBVRQ1 implements pulse-frequency modulation (PFM) with constant peak-current control, operating exclusively in discontinuous conduction mode (DCM) across its full load range. Its regulation relies on feedback of the output voltage via an external resistor divider connected to the FB pin, referenced to a precise 1.233-V internal bandgap.
Switching is governed by two independent turn-off conditions: reaching the 400-mA typical peak switch current or exceeding the 6-µs maximum ON-time. The internal N-channel MOSFET features 600–1100-mΩ RDS(on) at 2.4 V input and 200 mA, with undervoltage lockout activating below 1.5 V and thermal shutdown engaging at ~168°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 6 V - supports single-cell Li-ion, dual-cell NiMH/NiCd, and pre-regulated automotive rails without external LDO pre-biasing. |
| Output Voltage Range | Adjustable up to 28 V - set via external resistor divider on FB pin; enables direct driving of LCD bias rails and multi-LED strings. |
| Switch Current Limit | 400 mA typical - defines maximum inductor peak current and constrains achievable output power at low input voltages. |
| Switching Frequency | Up to 1 MHz - permits use of small 2.2–47 µH inductors and 1-µF ceramic output capacitors for minimal board area. |
| Quiescent Current | 28 µA typical - ensures >90% efficiency at light loads (e.g., standby backlight dimming), critical for battery runtime. |
| Shutdown Current | 1 µA typical - reduces system leakage when EN pin is pulled low, enabling deep-sleep modes in telematics modules. |
| Feedback Reference | 1.233 V ±27 mV over –40°C to 125°C - sets output accuracy and stability; requires <1 µA FB bias current for low-divider-power designs. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body size, 0.95 mm height, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode; carries high dv/dt and pulsed current. |
| GND (Pin 2) | Power ground | Main return path for switch current and IC bias; must be low-impedance connection to minimize noise coupling into FB. |
| FB (Pin 3) | Feedback input | High-impedance input sensing output voltage divider; 1-µA bias current enables high-resistor-ratio dividers for low quiescent power. |
| EN (Pin 4) | Enable control | Logic-level input; VIH ≥1.3 V enables operation, VIL ≤0.4 V forces shutdown with <1-µA supply current. |
| VIN (Pin 5) | Input supply | Primary power input; accepts 1.8–6 V; requires local 4.7-µF ceramic capacitor placed within 3 mm of pin for ESR/ESL stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient operation with full automotive reliability testing - suitable for under-hood and dashboard-mounted electronics. |
| Internal soft-start | Two-stage current limit ramp (256 cycles at ¼ ILIM, then 256 at ½ ILIM) prevents input rail sag during startup - eliminates need for external soft-start circuitry. |
| Pulse-frequency modulation (PFM) | Variable-frequency operation maintains >85% efficiency from 0.1 mA to 30 mA load - ideal for dynamically dimmed LED backlights with wide current range. |
| Thermal shutdown with hysteresis | Turns off MOSFET above ~168°C junction temperature; restarts after ~143°C cooldown - protects against sustained overload or poor PCB thermal design. |
| Undervoltage lockout (UVLO) | Disables switching below ~1.5 V VIN - prevents erratic operation during battery brownout or cold-cranking events in automotive systems. |
Applications
| Automotive Telematics Power Supply | ADAS Camera Bias Rail |
|---|---|
Use Scenario: Powers GPS/GSM module and eCall circuitry from 12-V vehicle bus via intermediate 3.3-V LDO, requiring 12-V boost for SIM card interface or RF front-end. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator generating stable 12 V from 3.3 V with fast transient response to burst data transmission. Use Value: Enables single-supply architecture without discrete charge pumps; 28-µA quiescent current extends battery backup runtime during ignition-off periods. | Use Scenario: Supplies 18-V bias voltage to CCD/CMOS image sensor analog front-end in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: High-precision adjustable boost converter regulating sensor bias rail with <±2% output tolerance over temperature. Use Value: Eliminates need for external op-amp feedback loop; PFM control ensures low noise during image capture, reducing pixel noise floor. |
| Infotainment LCD Panel Bias | White-LED Backlight Driver |
Use Scenario: Generates 20–25 V for TFT-LCD source/gate driver ICs in digital instrument clusters and center-stack displays. IC Role / Device Role / Timing Role: Compact, thermally robust boost stage delivering up to 10 mA at 25 V with minimal external components. Use Value: SOT-23-5 footprint allows placement directly behind display flex cable; 1-MHz switching avoids audible noise in cabin environment. | Use Scenario: Drives 4–6串联 white LEDs (VF ≈ 3.2 V each) in center-console or HVAC display backlighting. IC Role / Device Role / Timing Role: Constant-voltage boost converter with programmable output; LED current set externally via series resistor or current sink. Use Value: 400-mA switch current supports full-brightness operation even at lowest battery voltage (1.8 V); feed-forward capacitor option improves line regulation during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61041QDBVRQ1 | 250-mA switch current limit, higher RDS(on) (750–1300 mΩ), lower peak output power capability | Better suited for ultra-low-power LCD bias where <15 mA output suffices; reduced output ripple at light loads | Select when lower inductor saturation current and smaller magnetics are prioritized over max output current. |
| LM3352MMX/NOPB | Non-automotive grade, 1.8–5.5 V input, 28-V max output, 400-mA switch, but lacks AEC-Q100 qualification and thermal shutdown | Acceptable for industrial or consumer portable devices; not validated for automotive temperature cycling or ESD stress | Choose only for non-automotive designs where cost is primary and automotive reliability is not required. |
Compared with TPS61041QDBVRQ1, the TPS61040QDBVRQ1 delivers higher output current headroom and lower conduction loss, making it preferable for demanding LCD bias rails; versus LM3352MMX/NOPB, it provides guaranteed automotive qualification, integrated thermal protection, and tighter reference voltage drift over temperature.
Availability
TPS61040QDBVRQ1 is available at Aetrix Electronics and suitable for automotive telematics, ADAS camera modules, infotainment displays, and white-LED backlighting requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for TPS61040QDBVRQ1 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 automotive ICs with broad manufacturing scale and automotive qualification infrastructure.
The TPS6104x-Q1 product line was engineered specifically for automotive LCD bias and LED backlight applications, emphasizing small solution size, high efficiency across wide load ranges, and robust operation under harsh automotive electrical and thermal conditions.
FAQ
What is the maximum output voltage supported by the TPS61040QDBVRQ1?
The TPS61040QDBVRQ1 supports an adjustable output voltage range up to 28 V, set by an external resistor divider on the FB pin. This maximum is constrained by the 30-V absolute maximum switch voltage rating and internal 1.233-V reference accuracy. Operation beyond 28 V risks violating the 30-V SW pin rating and degrading long-term reliability.
Does the TPS61040QDBVRQ1 require an external feed-forward capacitor?
The TPS61040QDBVRQ1 does not require an external feed-forward capacitor (CFF) for basic operation, but TI recommends one (e.g., 10–22 pF) across the upper feedback resistor to prevent double-pulsing and reduce output voltage ripple. Omitting CFF improves line regulation but increases ripple; inclusion trades some line regulation for cleaner switching behavior.
How does the enable (EN) pin function on the TPS61040QDBVRQ1?
The EN pin on the TPS61040QDBVRQ1 is a logic-controlled shutdown input: pulling it below 0.4 V disables the internal switch and reduces supply current to 1 µA typical, while applying ≥1.3 V enables normal operation. The pin must never be left floating and requires explicit termination to VIN or GND via a pull-up/down resistor or microcontroller GPIO.
What is the typical quiescent current of the TPS61040QDBVRQ1 at no load?
The TPS61040QDBVRQ1 draws 28 µA typical operating quiescent current when enabled and delivering zero output current. This value is measured at VIN = 2.4 V, VFB = 1.3 V, and TA = 25°C. Quiescent current remains below 50 µA across the full –40°C to 125°C ambient range, enabling high light-load efficiency in always-on automotive subsystems.
Can the TPS61040QDBVRQ1 operate with ceramic output capacitors?
Yes, the TPS61040QDBVRQ1 is fully compatible with ceramic output capacitors, including 1-µF X5R/X7R types. Its PFM control architecture and internal compensation eliminate the need for high-ESR tantalum or aluminum electrolytic capacitors. Ceramic capacitors reduce solution size, improve reliability, and avoid aging-related capacitance drift common in wet electrolytics.
TPS61040QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- 400mA (Switch)
- Frequency:
- 1MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS61040QDBVRQ1 FAQ
1.How can I place an order for TPS61040QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040QDBVRQ1 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 TPS61040QDBVRQ1 reliable?
The price and inventory of TPS61040QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS61040QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040QDBVRQ1?
TPS61040QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040QDBVRQ1 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 TPS61040QDBVRQ1?
For technical support, including TPS61040QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040QDBVRQ1 requirements.
6.How does Aetrix verify that TPS61040QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS61040QDBVRQ1 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 TPS61040QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS61040QDBVRQ1?
All TPS61040QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040QDBVRQ1, 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 TPS61040QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS61040QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61040QDBVRQ1 Tags
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