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Texas Instruments TPS61040AQDBVRQ1
- Part No.:
- TPS61040AQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS61040AQDBVRQ1.pdf
- Description:
- 1.8-V TO 6-V INPUT RANGE, 400-MA
- Quantity:
- Payment:
- Shipping:
Inventory:2,809
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Product details
Overview
TPS61040AQDBVRQ1 from Texas Instruments is an automotive-grade, high-frequency DC-DC boost converter in a 5-pin SOT-23 package. It operates from 1.8 V to 6 V input, delivers up to 28 V output, features a 400-mA internal switch current limit, 28-µA typical quiescent current, and supports PFM control for high efficiency across load range - used in LCD bias supplies and white-LED backlighting for automotive clusters and ADAS displays.
For engineers reviewing the TPS61040AQDBVRQ1 datasheet, TPS61040AQDBVRQ1 pinout, TPS61040AQDBVRQ1 application, or TPS61040AQDBVRQ1 equivalent, key selection criteria include input voltage range (1.8–6 V), adjustable output up to 28 V, 400-mA switch current limit, 28-µA no-load IQ, and AEC-Q100 qualification for automotive telematics and infotainment systems.
Technical Context
The TPS61040AQDBVRQ1 implements pulse-frequency modulation (PFM) with constant peak-current control, enabling discontinuous conduction mode (DCM) operation across full load range. Its internal N-channel MOSFET has 600 mΩ typical RDS(on) at 2.4 V input and 200 mA, and integrates soft-start, undervoltage lockout (1.5 V threshold), and thermal shutdown (168°C trip).
Feedback regulation uses a precision 1.233 V internal reference with ±25 mV tolerance over –40°C to 125°C ambient. The device achieves up to 90% peak efficiency at 10 mA output into 18 V with 10 µH inductor and ceramic output capacitor, and maintains stable operation with minimum 400 ns off-time and 6 µs max on-time constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 6 V - supports single-cell Li-ion (2.7–4.2 V), dual-cell NiMH/NiCd (2.4–3.0 V), and pre-regulated 3.3/5 V rails. |
| Output Voltage Range | Adjustable up to 28 V - set via external resistor divider on FB pin; enables LCD bias (15–22 V) and LED string drive. |
| Switch Current Limit | 400 mA (typical) - defines maximum inductor peak current; determines max output power and ripple under light loads. |
| Quiescent Current | 28 µA (typical) - enables >1000-hour battery runtime in always-on automotive telematics modules. |
| Shutdown Current | 1 µA (typical) - minimizes standby drain when EN pin pulled low; critical for eCall system battery preservation. |
| Switching Frequency | Up to 1 MHz - allows use of small 2.2–10 µH inductors and 1 µF ceramic output capacitors for compact PCB layout. |
| Feedback Reference | 1.233 V ±25 mV - sets output voltage accuracy; enables ±1.5% VOUT tolerance with 1% resistors in divider network. |
Pinout & Package
TPS61040AQDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained automotive modules. Thermal resistance RθJA is 153.5°C/W, requiring minimal copper pour for thermal management in ambient up to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SW | Switch node | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode; carries pulsed current up to 400 mA peak. |
| 2: GND | Power ground | Reference return for internal circuitry and power stage; must be low-impedance connection to minimize noise coupling. |
| 3: FB | Feedback input | High-impedance (1 µA bias) input monitoring output voltage divider; regulates VOUT to 1.233 V × (1 + R1/R2). |
| 4: EN | Enable control | Active-high logic input; pulls device into <1 µA shutdown when grounded; requires external pull-up for default-on operation. |
| 5: VIN | Input supply | Primary power input (1.8–6 V); supplies internal bias and gate driver; bypassed with 4.7 µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient operation with full electrical validation - suitable for engine bay and dashboard electronics. |
| Integrated soft-start | Two-stage current limit ramp (256 cycles each) prevents inrush-induced input rail sag during cold start in automotive systems. |
| Pulse-frequency modulation (PFM) | Maintains >80% efficiency from 0.1 mA to 30 mA load - eliminates switching losses at light loads common in sensor biasing. |
| Internal 400-mA MOSFET switch | Eliminates need for external power transistor; reduces BOM count and layout area while supporting 18 V @ 10 mA LCD bias. |
| Undervoltage lockout (UVLO) | 1.5 V threshold prevents erratic startup below battery brownout level - ensures reliable reset in low-voltage vehicle cranking events. |
Applications
| Automotive LCD Cluster Bias | White-LED Backlight for Infotainment Display |
|---|---|
|
Use Scenario: Generating 18–22 V bias for TFT-LCD source/gate drivers in digital instrument clusters. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator; provides regulated high-voltage rail independent of battery fluctuations during stop-start cycles. Use Value: Enables consistent display contrast and grayscale fidelity across 9–16 V battery range; 28-µA IQ extends backup power duration during ignition-off. |
Use Scenario: Driving parallel strings of white LEDs (3.2 V per LED × 5–6 LEDs) in center-stack infotainment displays. IC Role / Device Role / Timing Role: Constant-voltage boost controller; interfaces with external LED current regulators or PWM dimming ICs. Use Value: Supports 10–30 mA output current with <1% line/load regulation; 1-MHz switching avoids audible noise in cabin audio-sensitive zones. |
| eCall System Backup Power Supply | ADAS Camera Module HV Bias |
|
Use Scenario: Providing 12 V standby rail for GSM/GNSS module and microphone amplifier in emergency call systems. IC Role / Device Role / Timing Role: Always-on boost converter powered from vehicle's 3.3 V or 5 V domain; activated only during crash event detection. Use Value: 1 µA shutdown current preserves coin-cell or supercapacitor energy for >72 hours; AEC-Q100 qualification ensures reliability in safety-critical path. |
Use Scenario: Supplying 15 V bias to image sensor analog front-end and lens actuator drivers in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: High-stability voltage source with low noise (<10 mVPP) and fast transient response for pixel-level signal integrity. Use Value: Achieves <50 ns load transient recovery using feed-forward capacitor; RDS(on) stability over temperature ensures consistent SNR across operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61041AQDBVRQ1 | 250-mA switch current limit (vs. 400 mA); higher RDS(on) (750 mΩ typ); lower output ripple at light loads. | Better suited for <15 mA LED bias or low-power sensor bias where size and ripple matter more than max output current. | Select TPS61041AQDBVRQ1 when output current ≤15 mA and lower EMI is prioritized; not drop-in due to reduced current capability. |
| LM3352MMX/NOPB | Non-automotive grade; 20-V max output; 1.5-A switch; fixed 500-kHz frequency; no UVLO or thermal shutdown. | Targeted at industrial/commercial portable devices; lacks AEC-Q100 qualification and automotive thermal/safety features. | Use LM3352MMX/NOPB only in non-automotive designs; requires external protection circuitry and derating for 125°C ambient. |
Compared with TPS61040AQDBVRQ1, TPS61041AQDBVRQ1 trades peak current for lower ripple and smaller inductor size, while LM3352MMX/NOPB offers higher current but omits automotive reliability features - making TPS61040AQDBVRQ1 the optimal balance of output capability, efficiency, and AEC-Q100 compliance.
Availability
TPS61040AQDBVRQ1 is available at Aetrix Electronics and suitable for automotive telematics, ADAS camera modules, and infotainment display subsystems requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for TPS61040AQDBVRQ1 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 automotive ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The TPS6104x-Q1 product line was designed specifically for high-reliability, space-constrained automotive power conversion - delivering efficient, low-noise, AEC-Q100-compliant boost regulation for LCD bias, LED backlighting, and sensor interface rails.
FAQ
What is the maximum output voltage supported by the TPS61040AQDBVRQ1?
The TPS61040AQDBVRQ1 supports an adjustable output voltage up to 28 V, set via an external resistor divider on the FB pin. This is confirmed in the datasheet's Recommended Operating Conditions table (VOUT MAX = 28 V) and validated in typical application circuits generating 18 V and 22 V outputs for LCD bias. Operation beyond 28 V risks exceeding the 30 V absolute maximum switch voltage rating.
Does the TPS61040AQDBVRQ1 require an external feed-forward capacitor?
Yes, the TPS61040AQDBVRQ1 requires a feed-forward capacitor (CFF) across the upper feedback resistor to prevent double-pulsing and excessive output voltage ripple. The datasheet specifies CFF = 22 pF in the typical application (Figure 12) and states that omitting it causes pulse bursts on the SW pin. A starting value of 10–22 pF is recommended, scaled per Equation 6 based on selected inductor and switching frequency.
What is the thermal shutdown behavior of the TPS61040AQDBVRQ1?
The TPS61040AQDBVRQ1 incorporates internal thermal shutdown with a typical trip point of 168°C junction temperature and ~25°C hysteresis. When triggered, the internal MOSFET is disabled until die temperature falls below ~143°C, after which normal operation resumes. This behavior is documented in Section 7.3.5 and Figure 15 (start-up behavior), and is statistically derived - not production-tested per unit.
Can the TPS61040AQDBVRQ1 operate from a 1.8 V input without issues?
Yes, the TPS61040AQDBVRQ1 is fully specified to operate from 1.8 V input, as stated in the Recommended Operating Conditions table (VIN MIN = 1.8 V). At this voltage, it delivers regulated output up to 28 V with ≥70% efficiency at 5 mA load (per Figure 3), and maintains stable PFM operation down to –40°C ambient. Below 1.8 V, undervoltage lockout disables switching.
How does the enable (EN) pin function on the TPS61040AQDBVRQ1?
The EN pin on the TPS61040AQDBVRQ1 is an active-high logic input: pulling it to GND forces the device into shutdown mode with <1 µA supply current, while connecting it to VIN or a logic-high signal enables regulation. The datasheet explicitly warns against leaving EN floating and recommends a pull-up resistor; it also notes that output voltage equals input voltage during shutdown due to inductor/diode conduction path.
TPS61040AQDBVRQ1 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:
- 400mA
- Frequency:
- 1MHz
- Dimming:
- No
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS61040AQDBVRQ1 FAQ
1.How can I place an order for TPS61040AQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61040AQDBVRQ1 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 TPS61040AQDBVRQ1 reliable?
The price and inventory of TPS61040AQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61040AQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS61040AQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61040AQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61040AQDBVRQ1?
TPS61040AQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61040AQDBVRQ1 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 TPS61040AQDBVRQ1?
For technical support, including TPS61040AQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61040AQDBVRQ1 requirements.
6.How does Aetrix verify that TPS61040AQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS61040AQDBVRQ1 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 TPS61040AQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS61040AQDBVRQ1?
All TPS61040AQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61040AQDBVRQ1, 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 TPS61040AQDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS61040AQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61040AQDBVRQ1 Tags
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