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Texas Instruments TPS62903RPJR
- Part No.:
- TPS62903RPJR
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS62903RPJR.pdf
- Description:
- IC REG BUCK ADJ 3A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,411
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Product details
Overview
TPS62903RPJR from Texas Instruments is a synchronous step-down DC-DC converter optimized for high efficiency and ultra-low quiescent current in space-constrained applications. It operates from 3 V to 17 V input, delivers up to 3 A continuous output, features 4 µA typical IQ in power save mode, supports selectable 2.5 MHz or 1.0 MHz switching frequency, and achieves ±0.9% feedback voltage accuracy across –40°C to +150°C - enabling reliable point-of-load regulation in industrial motor drives and enterprise computing rails.
For engineers reviewing the TPS62903RPJR datasheet, TPS62903RPJR pinout, TPS62903RPJR application, or TPS62903RPJR equivalent, key selection considerations include its DCS-Control™ topology for fast transient response, 1.5-mm × 2.0-mm VQFN-HR package with 0.5-mm pitch, MODE/S-CONF configurable operation (AEE, forced PWM, internal/external VSET), active output discharge, and precise enable threshold with Smart-Enable™ functionality.
Technical Context
The TPS62903RPJR implements DCS-Control™ topology - combining voltage-mode stability with hysteretic-like transient response - using an internal 1-V reference, seamless transition between PWM and PFM modes, and predictive off-time control for AEE. Its control loop directly senses output voltage changes at the VOS pin and adjusts switching timing without external compensation.
It integrates dual N-channel MOSFETs with 62-mΩ high-side and 22-mΩ low-side RDS(ON), supports 100% duty cycle operation, and uses a dedicated VOS pin for remote output voltage sensing - decoupling feedback path from PCB layout parasitics. The MODE/S-CONF pin enables resistor-based configuration of switching frequency, output discharge, and operating mode during startup only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports 5 V, 12 V, and multi-cell Li-ion rails without pre-regulation |
| Output Current | Up to 3 A continuous - sufficient for FPGA core, ASIC I/O, or microcontroller subsystems |
| Quiescent Current | 4 µA typical in power save mode - extends battery life in always-on industrial sensors |
| Feedback Accuracy | ±0.9% over –40°C to +150°C - ensures stable regulation under thermal stress in motor drives |
| Switching Frequency | Selectable 2.5 MHz or 1.0 MHz - enables compact 1.0-µH inductor use or lower EMI with 1-MHz option |
| RDS(ON) | 62 mΩ (HS) / 22 mΩ (LS) - minimizes conduction loss at full load, improving thermal performance |
| Package | VQFN-HR, 1.5 mm × 2.0 mm, 9-pin, 0.5-mm pitch - supports single-layer PCB routing and high-density layouts |
Pinout & Package
The TPS62903RPJR is housed in a thermally enhanced 9-pin VQFN-HR package (1.5 mm × 2.0 mm, 0.5-mm pitch) with exposed thermal pad for improved power dissipation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power good indicator | Signals VOUT regulation status; requires external pullup; used for rail sequencing in multi-voltage systems |
| 2 - SW | Switch node | Connects to inductor; carries high di/dt; must be routed short and wide to minimize EMI and losses |
| 3 - VOS | Remote output voltage sense | Direct connection to output capacitor positive terminal eliminates PCB trace IR drop error |
| 4 - GND | Power and signal ground | Must connect to solid ground plane; serves as return for all internal circuits and power switches |
| 5 - EN | Enable input with precise threshold | Logic-compatible; rising threshold = 0.97 V, falling = 0.9 V; supports RC delay and UVLO programming |
| 6 - VIN | Main input supply | Requires local 3–10 µF ceramic capacitor placed adjacent to pin to suppress high-frequency noise |
| 7 - MODE/S-CONF | Configuration and mode selection | Resistor-programmable for frequency, VSET/FB, discharge, and auto/forced PWM - interpreted once at startup |
| 8 - SS/TR | Soft-start and tracking input | Capacitor sets ramp time; also accepts external voltage for power-rail tracking in multi-supply systems |
| 9 - FB/VSET | Feedback or internal voltage setpoint | Configurable as resistive divider input (0.6–5.5 V) or VSET pin (16 fixed outputs from 0.4 V to 5.5 V) |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <100-ns transient response and stable regulation with minimal external components - no loop compensation required |
| Automatic Efficiency Enhancement (AEE) | Dynamically adjusts on-time and switching frequency to maintain >85% efficiency across wide VIN/VOUT/load combinations |
| No external bootstrap capacitor | Integrated charge pump eliminates discrete bootstrap component - reduces BOM count and layout area |
| 100% duty cycle operation | Supports dropout operation down to VOUT ≈ VIN − 0.2 V - critical for low-VIN bias rails in automotive and industrial systems |
| Adjustable soft start & tracking | SS/TR pin enables controlled ramp-up and synchronization with master supplies - prevents inrush and sequencing faults |
Applications
| Factory Automation Power Rail | Enterprise Server Point-of-Load |
|---|---|
Use Scenario: Powering programmable logic controllers (PLCs), I/O modules, and fieldbus interface ICs in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 3.3-V or 1.8-V buck regulator delivering clean, stable power with ±0.9% accuracy across –40°C to +150°C junction range. Use Value: Eliminates need for external monitoring circuitry due to integrated PG output and thermal shutdown - simplifies safety-critical system certification. | Use Scenario: Supplying core voltage to Xeon-class CPUs or FPGAs in 1U rack servers where board space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency, high-current POL converter operating at 2.5 MHz to minimize inductor size while maintaining tight load-transient response. Use Value: 4-µA IQ and AEE extend runtime during low-utilization states (e.g., idle server cores), reducing overall data center energy consumption. |
| Motor Drive Control Board | Notebook System Power Management |
Use Scenario: Generating isolated gate-driver bias rails and MCU core supplies in servo and BLDC motor inverters subject to high EMI and thermal cycling. IC Role / Device Role / Timing Role: Secondary buck supplying 5-V or 3.3-V logic rails with robust ESD protection (±2 kV HBM) and 17-V max input tolerance for bus transients. Use Value: VOS-sense architecture rejects PCB trace resistance errors - maintains regulation accuracy despite copper heating under high-current motor loads. | Use Scenario: Regulating DDR memory, SoC I/O, and display backlight supplies in ultrathin notebooks requiring minimal solution footprint. IC Role / Device Role / Timing Role: Compact 1.5-mm × 2.0-mm buck converter supporting dynamic voltage scaling via MODE/S-CONF resistor configuration. Use Value: Single-layer routing capability and optimized pinout reduce layer count and PCB cost - critical for high-volume consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62901RPJR | Same package and pinout; 1-A output rating; identical DCS-Control™ and AEE features | Suitable for lower-current rails (e.g., sensor interfaces, auxiliary logic) where 3-A capability is unnecessary | Select when load current ≤1 A to reduce cost and simplify thermal design without sacrificing feature set |
| MP2143GJ-Z | 2.5-MHz fixed-frequency buck; 3-A rating; no AEE or VOS sense; 20-V max input; QFN-10 (2 mm × 2 mm) | Lacks remote sensing and adaptive efficiency - less accurate under thermal drift or layout variation | Choose for cost-sensitive, non-critical rails where ±2% VOUT accuracy and basic PWM-only operation suffice |
Compared with TPS62901RPJR, the TPS62903RPJR provides 3× higher output current in identical footprint; versus MP2143GJ-Z, it adds VOS sensing, AEE, and tighter ±0.9% regulation - justifying use in precision, thermally demanding, or battery-sensitive applications.
Availability
TPS62903RPJR is available at Aetrix Electronics and suitable for factory automation, enterprise server power delivery, and motor drive control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS62903RPJR 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 technologies - with decades of expertise in high-reliability DC-DC conversion.
The TPS6290x product line was designed specifically for high-efficiency, low-IQ, small-footprint point-of-load regulation in thermally constrained industrial, computing, and motor control applications - emphasizing accuracy, configurability, and ease of implementation.
FAQ
What is the maximum output current capability of the TPS62903RPJR?
The TPS62903RPJR delivers up to 3 A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Peak current limit is 4.0–5.5 A for the high-side FET and 4.0–5.0 A for the low-side FET, depending on junction temperature and input voltage. Derating applies above 125°C per the thermal metrics in the datasheet.
Does the TPS62903RPJR require an external bootstrap capacitor?
No, the TPS62903RPJR does not require an external bootstrap capacitor. It integrates an internal charge pump that self-biases the high-side gate driver, eliminating the need for discrete bootstrap components and simplifying layout - a key advantage over many competing buck converters.
How does the VOS pin improve regulation accuracy in the TPS62903RPJR?
The VOS pin in the TPS62903RPJR enables true remote output voltage sensing by connecting directly to the positive terminal of the output capacitor. This bypasses PCB trace resistance between the IC and load, preventing IR-drop-induced regulation error - especially critical in high-current or thermally cycled applications where copper resistance varies significantly.
Can the TPS62903RPJR operate with 100% duty cycle?
Yes, the TPS62903RPJR supports 100% duty cycle operation, allowing it to maintain regulation even when VOUT approaches VIN (down to VOUT ≈ VIN − 0.2 V). This capability is essential for low-dropout bias rails in systems with tightly regulated input supplies or brownout conditions.
What are the configuration options for the MODE/S-CONF pin on the TPS62903RPJR?
The MODE/S-CONF pin on the TPS62903RPJR supports three configuration methods: logic HIGH/LOW for dynamic mode selection (auto PFM/PWM or forced PWM), or 16 discrete resistor values (7.15 kΩ to 249 kΩ) to permanently configure switching frequency (1.0/2.5 MHz), internal/external feedback (VSET/FB), output discharge enable/disable, and operating mode - all interpreted once at startup.
TPS62903RPJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-VFQFN
- 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):
- 17V
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-VQFN-HR (1.5x2)
TPS62903RPJR FAQ
1.How can I place an order for TPS62903RPJR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62903RPJR 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 TPS62903RPJR reliable?
The price and inventory of TPS62903RPJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62903RPJR is usually 5 days.
3.What payment methods are accepted for TPS62903RPJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62903RPJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62903RPJR?
TPS62903RPJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62903RPJR 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 TPS62903RPJR?
For technical support, including TPS62903RPJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62903RPJR requirements.
6.How does Aetrix verify that TPS62903RPJR is sourced from the original manufacturer or authorized distributors?
All TPS62903RPJR 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 TPS62903RPJR meets industry standards.
7.What is the process for return or replacement of TPS62903RPJR?
All TPS62903RPJR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62903RPJR, 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 TPS62903RPJR part is unused and in its original packaging.
Return procedure for TPS62903RPJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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