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Texas Instruments TPS62903QRYTRQ1
- Part No.:
- TPS62903QRYTRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-TFQFN
- Datasheet:
-
TPS62903QRYTRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,569
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Product details
Overview
TPS62903QRYTRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 3-A continuous output current with 4-µA typical quiescent current, ±1.5% output voltage accuracy across –40°C to +165°C junction temperature, and selectable 1-MHz or 2.5-MHz switching frequency for ADAS power rails.
For engineers reviewing the TPS62903QRYTRQ1 datasheet, TPS62903QRYTRQ1 pinout, TPS62903QRYTRQ1 application, or TPS62903QRYTRQ1 equivalent, key selection criteria include its DCS-Control topology for fast transient response, wettable-flank 2.2-mm × 2.0-mm VQFN-9 package, MODE/S-CONF programmability for auto-PFM/PWM mode and VSET configuration, and integrated overtemperature/overcurrent protection.
Technical Context
The TPS62903QRYTRQ1 implements DCS-Control topology-combining hysteretic, voltage-mode, and current-mode advantages-to achieve constant-frequency operation under steady-state loads while enabling immediate response to load transients via direct output voltage sensing into a fast comparator stage. Internal compensation eliminates external loop components.
Its dual-mode control logic interprets the MODE/S-CONF pin at startup to configure switching frequency (1 MHz or 2.5 MHz), feedback method (FB external divider or VSET internal resistor network), output discharge enable, and operating mode (forced PWM or auto PFM with AEE). Dynamic mode change is supported only when MODE/S-CONF is driven high/low-not resistor-configured.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 18 V - supports 12-V automotive rails, multi-cell Li-ion, and 5-V/3.3-V intermediate supplies without external pre-regulation. |
| Output Current | Up to 3 A continuous - enables single-chip power delivery for radar SoCs, camera ISPs, and infotainment processors. |
| Quiescent Current | 4 µA typical in power-save mode - sustains ultra-low standby power in always-on vehicle modules (e.g., domain controllers). |
| Output Voltage Accuracy | ±1.5% over –40°C to +165°C TJ - ensures stable core voltage regulation under extreme under-hood thermal stress. |
| Switching Frequency | Selectable 1.0 MHz or 2.5 MHz - allows optimization between small inductor size (2.5 MHz) and EMI filtering ease (1.0 MHz). |
| RDS(ON) | 62 mΩ (HS) / 22 mΩ (LS) - minimizes conduction loss at full load, supporting >90% efficiency at 3.3 VOUT/2 A with 12-VIN. |
| Package | VQFN-9 (RYT), 2.2 mm × 2.0 mm, 0.5-mm pitch - wettable flanks enable automated optical inspection (AOI) and reliable solder joint validation in automotive PCB assembly. |
Pinout & Package
VQFN-9 (RYT) package: 2.2 mm × 2.0 mm body, 0.5-mm pitch, wettable flanks, exposed thermal pad (GND-connected). Optimized for single-layer routing with non-overlapping power/ground pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PG (Pin 1) | Open-drain power-good output | Asserts high when VOUT reaches 93–99% of nominal; requires external pullup; used for system sequencing and fault monitoring. |
| SW (Pin 2) | Power switch node | Connects internal HS/LS FETs to external inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI. |
| VOS (Pin 3) | Output voltage sense | Direct connection to output capacitor positive terminal enables accurate remote sensing and tight regulation under load step conditions. |
| GND (Pin 4) | Power ground | Primary return path for power switches and IC substrate; must connect directly to low-impedance PCB ground plane. |
| EN (Pin 5) | Enable input | Logic-level control with precise thresholds (VIH = 0.97–1.03 V, VIL = 0.82–0.88 V); no internal pullup/pulldown - must be actively driven. |
| VIN (Pin 6) | Input power supply | Accepts 3–18 V; requires local 3–10 µF ceramic input capacitor placed adjacent to VIN/GND pins to suppress high-frequency ripple. |
| MODE/S-CONF (Pin 7) | Configuration and mode select | Dual-function pin: sets switching frequency, feedback type (FB/VSET), discharge enable, and PFM/PWM mode via resistor or logic level. |
| SS/TR (Pin 8) | Soft-start and tracking input | 2.5-µA current source charges external capacitor for controlled ramp-up; also accepts external voltage for supply tracking during power sequencing. |
| FB/VSET (Pin 9) | Feedback or voltage-set input | Configurable as FB (for external resistor divider, 0.6–5.5 V) or VSET (for internal divider with 16 fixed outputs, 0.4–5.5 V). |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Enables <10-µs load transient response with stable regulation using only small ceramic capacitors and no external compensation components. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient (TA) and up to +165°C junction (TJ), meeting automotive reliability and lifetime requirements. |
| 100% duty cycle operation | Permits dropout operation down to VOUT ≈ VIN − 0.2 V, critical for cold-crank scenarios where battery dips to 3 V while powering 3.3-V systems. |
| Power-good (PG) output | Provides system-level status signaling with 32-µs delay and 1.5–6% hysteresis, enabling safe processor reset and rail sequencing in multi-rail domains. |
| No external bootstrap capacitor | Integrated charge pump eliminates discrete bootstrap components, reducing BOM count and layout complexity in space-constrained modules. |
Applications
| Radar Sensor Power Supply | Automotive Camera Module |
|---|---|
|
Use Scenario: Powers 77-GHz radar transceiver SoC requiring clean, tightly regulated 1.2-V core and 3.3-V I/O rails in engine bay environments. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3-A peak current with <10-µs transient response to handle RF transmit bursts. Use Value: DCS-Control maintains ±1.5% VOUT accuracy across –40°C to +165°C TJ, ensuring consistent ADC reference stability and RF PLL performance. |
Use Scenario: Supplies image signal processor (ISP) and MIPI CSI-2 serializer in rear-view camera with extended temperature operation. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with 4-µA IQ enabling always-on video wake-up without draining 12-V battery. Use Value: 2.5-MHz switching enables use of 1-µH inductor, minimizing solution footprint while maintaining >92% efficiency at 2-A load. |
| Instrument Cluster Display | EV Battery Management Unit |
|
Use Scenario: Generates 5.0-V backlight and 1.8-V logic supply for TFT-LCD cluster with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Dual-output-capable buck (via VSET + external LDO) with MODE/S-CONF configurable 1-MHz switching for EMI compliance. Use Value: Wettable-flank VQFN-9 package supports AOI inspection, satisfying automotive process audit requirements for safety-critical displays. |
Use Scenario: Powers microcontroller and isolated gate drivers in high-voltage battery disconnect unit operating near traction battery packs. IC Role / Device Role / Timing Role: Robust 3-A buck converter with overtemperature shutdown (168–185°C) and 100% duty cycle for cold-crank resilience. Use Value: RDS(ON) of 62 mΩ (HS) / 22 mΩ (LS) reduces thermal rise at full load, extending lifetime in sealed, convection-limited enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62902QRYTRQ1 | 2-A output current rating; identical pinout, package, and feature set except reduced current capability and lower ILIM (3.8–4.4 A LS). | Suitable for lower-power ADAS sensors (e.g., ultrasonic parking assist) where 3-A headroom is unnecessary. | Select when system peak load is ≤2 A and cost reduction is prioritized without changing PCB layout. |
| LM61480QRNXTQ1 | 3.5-A rating, 2.1-MHz fixed frequency, different pinout (16-pin WQFN), no VSET option, higher IQ (15 µA), larger package (3.5 mm × 3.0 mm). | Better suited for high-current, lower-EMI applications where board space permits larger footprint and fixed-frequency operation is preferred. | Choose when needing higher current margin or compatibility with existing LM614xx-based designs, accepting larger size and no VSET flexibility. |
Compared with TPS62902QRYTRQ1, the TPS62903QRYTRQ1 provides 50% higher current headroom and tighter thermal derating for sustained 3-A loads; versus LM61480QRNXTQ1, it offers smaller footprint, lower IQ, and programmable VSET-but lacks spread-spectrum EMI reduction.
Availability
TPS62903QRYTRQ1 is available at Aetrix Electronics and suitable for ADAS sensor modules, instrument cluster displays, and EV battery management units requiring stable component supply across automotive production lifecycles.
Supply support for TPS62903QRYTRQ1 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-grade power management ICs with decades of AEC-Q100 qualification experience.
The TPS6290x-Q1 product line delivers high-efficiency, low-IQ DC/DC converters optimized for automotive subsystems demanding extended temperature operation, functional safety readiness, and compact packaging.
FAQ
What is the maximum junction temperature rating for the TPS62903QRYTRQ1?
The TPS62903QRYTRQ1 is rated for operation up to +165°C junction temperature (TJ), with thermal shutdown triggered at 168–185°C. This extended range supports placement in high-heat zones like engine compartments and power inverters, where ambient temperatures exceed standard industrial limits. The device maintains ±1.5% output voltage accuracy across the full –40°C to +165°C TJ range, as verified in TI's production test data.
Does the TPS62903QRYTRQ1 support both adjustable and fixed output voltage configurations?
Yes, the TPS62903QRYTRQ1 supports two distinct output voltage configurations: adjustable mode using an external resistor divider on the FB/VSET pin (0.6 V to 5.5 V), and fixed mode using the VSET internal divider with 16 factory-programmed options (0.4 V to 5.5 V). Configuration is determined by the MODE/S-CONF pin state at startup, as defined in Table 8-1 of the datasheet. Mixing configurations (e.g., VSET resistor with FB-mode pin setting) will cause unregulated output and must be avoided.
How does the MODE/S-CONF pin affect dynamic mode switching in the TPS62903QRYTRQ1?
The MODE/S-CONF pin determines whether dynamic mode switching is enabled: if driven high or low (not resistor-configured), the TPS62903QRYTRQ1 supports real-time toggling between forced PWM and auto PFM modes during operation. If configured via resistor (e.g., 7.15 kΩ for 2.5-MHz auto PFM), mode selection is locked at startup and requires power cycling to change. This distinction is critical for applications needing runtime efficiency adaptation (e.g., radar burst vs. idle states) versus static, optimized configurations.
What is the purpose of the VOS pin on the TPS62903QRYTRQ1, and how should it be connected?
The VOS pin on the TPS62903QRYTRQ1 provides Kelvin sensing of the output voltage at the load, enabling precise regulation despite PCB trace resistance. It must be connected directly to the positive terminal of the main output capacitor-never to the SW node or inductor output. This connection allows the IC to compensate for IR drop between the switch node and load, maintaining ±1.5% accuracy even under high-current, long-trace conditions common in automotive ECUs.
Is the TPS62903QRYTRQ1 qualified for functional safety applications?
Yes, the TPS62903QRYTRQ1 is functional safety-capable, with documentation available from Texas Instruments to support ISO 26262 ASIL-B system-level development. It includes safety-relevant features such as power-good output with defined timing, thermal shutdown with hysteresis, overcurrent protection with separate high-side and low-side current limits, and precise enable thresholds-all characterized across the full automotive temperature range. No additional external monitoring circuitry is required to meet ASIL-B diagnostic coverage targets for power supply monitoring.
TPS62903QRYTRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-TFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 1MHz, 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 165°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (2.2x2)
TPS62903QRYTRQ1 FAQ
1.How can I place an order for TPS62903QRYTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62903QRYTRQ1 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 TPS62903QRYTRQ1 reliable?
The price and inventory of TPS62903QRYTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62903QRYTRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62903QRYTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62903QRYTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62903QRYTRQ1?
TPS62903QRYTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62903QRYTRQ1 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 TPS62903QRYTRQ1?
For technical support, including TPS62903QRYTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62903QRYTRQ1 requirements.
6.How does Aetrix verify that TPS62903QRYTRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62903QRYTRQ1 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 TPS62903QRYTRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62903QRYTRQ1?
All TPS62903QRYTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62903QRYTRQ1, 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 TPS62903QRYTRQ1 part is unused and in its original packaging.
Return procedure for TPS62903QRYTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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