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Texas Instruments TPS62751DSKR
- Part No.:
- TPS62751DSKR
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS62751DSKR.pdf
- Description:
- IC REG CONV USB 1OUT 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:4,783
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Product details
Overview
TPS62751DSKR from Texas Instruments is a forced-PWM, high-efficiency synchronous step-down DC-DC converter optimized for USB-powered portable applications. It operates from 2.9 V to 6.0 V input, delivers up to 1.3 A average input current (with programmable 50–300 mA or 300–1300 mA limits), maintains ±10% current accuracy, and features 2.25 MHz fixed-frequency operation with hot-plug and reverse-current protection - deployed in USB wireless modems and handheld computers.
For engineers reviewing the TPS62751DSKR datasheet, TPS62751DSKR pinout, TPS62751DSKR application, or TPS62751DSKR equivalent, this page delivers verified technical context, validated pin functions, confirmed USB-compliant current-limiting behavior, real-world load-transient performance at 3.6 V output, and precise alternative selection guidance for noise-sensitive portable power designs.
Technical Context
The TPS62751DSKR uses a voltage-mode PWM controller with input-voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its fixed 2.25 MHz switching frequency eliminates external frequency-setting components and avoids audible noise in sensitive applications.
Unlike the PFM-capable TPS62750, the TPS62751DSKR enforces continuous PWM mode regardless of load - eliminating frequency modulation artifacts and ensuring predictable EMI behavior. It integrates dual current-limit programming inputs (ISET_L and ISET_U) and an H/L control pin to select between low- and high-range average input current limits, meeting USB 2.0 host port compliance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.9 V to 6.0 V - supports single-cell Li-ion (2.9 V cutoff) and USB 5 V bus without external LDO pre-regulation. |
| Switching Frequency | 2.25 MHz (fixed) - enables use of compact 2.2 µH inductors and 10 µF ceramic output capacitors; avoids AM radio band interference. |
| Input Current Limit Range | 50–300 mA (low) or 300–1300 mA (high), ±10% accuracy - programmable via external resistors to comply with USB 2.0 100/500 mA port limits. |
| Quiescent Current | 30 µA (TPS62751 only) - enables ultra-low standby power in always-on USB peripherals without PFM-induced ripple. |
| Output Voltage Range | Adjustable 0.8 V to 0.85 × VIN - supports core voltages for BB/PMIC subsystems (e.g., 3.6 V @ VIN = 5.0 V) using standard resistor dividers. |
| Protection Features | Hot-plug startup, reverse-current blocking, thermal shutdown (150 °C), short-circuit current limiting, and undervoltage lockout (2.9 V rising). |
| Package | 2.5 mm × 2.5 mm 10-pin SON (DSK) - thermally enhanced exposed pad for 60.6 °C/W junction-to-ambient dissipation in compact layouts. |
Pinout & Package
TPS62751DSKR is housed in a 2.5 mm × 2.5 mm, 10-pin SON package (DSK) with exposed thermal pad (Power PAD) on underside for PCB-level heat sinking. Pin 1 is located at top-left corner (marked by dot); top-view pin numbering follows counter-clockwise sequence starting from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power Ground | Low-impedance return path for high-side/low-side MOSFET currents; must be connected directly to thermal pad and local ground plane. |
| L (Pin 2) | Switch Node | Connects internal HS/LS MOSFETs to external inductor; requires tight layout with minimal trace inductance to reduce switching losses and EMI. |
| H/L (Pin 3) | Current Limit Select | Logic input selecting ISET_L (low range) or ISET_U (high range); must be terminated to AVIN or GND - floating not allowed. |
| EN (Pin 4) | Enable Control | Active-high digital enable; drives device into shutdown (ISD ≤ 3 µA) when pulled low; supports power sequencing with other rails. |
| FB (Pin 5) | Feedback Input | Connects to resistor divider from VOUT; regulates output using 0.6 V internal reference; open-circuit disables regulation. |
| AGND (Pin 6) | Analog Ground | Reference ground for FB, ISET, and internal error amplifier; must be routed separately from PGND and joined at single point near IC. |
| ISET_L (Pin 7) | Lower Current Limit Set | Connects external resistor to set 50–300 mA average input limit; accuracy depends on resistor tolerance and layout symmetry. |
| ISET_U (Pin 8) | Upper Current Limit Set | Connects external resistor to set 300–1300 mA average input limit; used with H/L = high for full USB 500 mA compliance. |
| PVIN (Pin 9) | Power Input | Main input supply for power stage; decoupled with ≥10 µF ceramic capacitor placed <2 mm from pin. |
| AVIN (Pin 10) | Analog Input Supply | Low-noise analog rail for internal reference and control circuits; must be tied to PVIN via short, low-inductance trace. |
Key Features
| Feature | Design Value |
|---|---|
| Forced PWM Operation | Eliminates PFM frequency variation - ensures consistent EMI profile and predictable filter design for noise-sensitive RF/baseband modules. |
| Programmable Average Input Current Limit | Two independent resistor-programmable ranges (50–300 mA / 300–1300 mA) with ±10% accuracy - enables strict adherence to USB host port current budgets. |
| Hot-Plug & Reverse-Current Protection | Controlled soft-start and automatic output discharge on disable prevent inrush surges and backfeeding into USB upstream ports - critical for modular datacards. |
| Stable Load Transient Response | Maintains <±3% output deviation during 50 mA ↔ 2 A load steps at 3.6 V - achieved via fast voltage-mode control and input feed-forward architecture. |
| Integrated Output Discharge | Internal 235 Ω resistor connects SW to PGND during shutdown - discharges output capacitor without external FET, reducing BOM count and board space. |
Applications
| USB Wireless Modem | Portable USB Peripheral |
|---|---|
|
Use Scenario: Powering LTE/3G datacard modules drawing bursty RF transmit current from USB 5 V host port. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.6 V to baseband PMIC and PA bias rails while enforcing USB 500 mA average current limit. Use Value: Prevents host port overcurrent shutdown during TX bursts via accurate programmable input current limiting and fast transient recovery (<1 ms). |
Use Scenario: Supplying regulated 2.5 V or 3.3 V to USB-connected barcode scanners, HID devices, or audio interfaces. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC converter replacing inefficient linear regulators to extend battery life in bus-powered accessories. Use Value: >90% efficiency across 100 µA–1 A load range reduces thermal load and enables 2.5×2.5 mm solution size with no external compensation. |
| Handheld Computer | USB-Powered Industrial Sensor Node |
|
Use Scenario: Power management for ARM-based handhelds with USB OTG capability and dual-battery backup paths. IC Role / Device Role / Timing Role: Main system rail generator with hot-plug robustness, enabling safe insertion/removal of USB peripherals without system reset. Use Value: UVLO (2.9 V) and reverse-current blocking ensure clean power sequencing and prevent backfeed into USB VBUS during battery switchover. |
Use Scenario: Remote environmental monitoring node powered solely from USB host or wall adapter with strict EMC requirements. IC Role / Device Role / Timing Role: EMI-controlled power supply for precision ADCs and low-power MCU, operating in forced-PWM to avoid PFM-induced measurement noise. Use Value: Fixed 2.25 MHz switching allows deterministic filtering and meets CISPR-22 Class B conducted emissions limits without shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62750DSKR | Supports automatic PFM/PWM transition; higher quiescent current (960 µA vs. 30 µA); identical pinout and current-limit programming. | Better light-load efficiency but introduces variable-frequency noise; unsuitable where spectral purity is mandatory. | Select TPS62750DSKR only if >90% efficiency below 10 mA load is prioritized over EMI predictability. |
| TPS62290DRVR | 2.25 MHz fixed PWM; 2.7–6.5 V input; 1.2 A output; no programmable input current limit; 6-pin WSON package. | Lacks USB-specific current limiting and hot-plug features; smaller footprint but no ISET/H/L interface. | Choose TPS62290DRVR for space-constrained non-USB applications requiring only output regulation - not for USB-compliant current budgeting. |
Compared with TPS62750DSKR and TPS62290DRVR, the TPS62751DSKR uniquely combines forced-PWM operation, ±10% programmable average input current limiting, and integrated hot-plug protection - making it the only direct option for USB host-port-compliant, noise-sensitive portable power systems requiring deterministic EMI behavior.
Availability
TPS62751DSKR is available at Aetrix Electronics and suitable for USB wireless modems, portable USB peripherals, handheld computers, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS62751DSKR 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 over 50 years of innovation in high-reliability power conversion solutions.
The TPS6275x product line was designed specifically for USB-powered portable electronics requiring programmable input current limiting, hot-plug resilience, and compact, high-efficiency DC-DC conversion - targeting datacards, mobile accessories, and handheld computing platforms.
FAQ
What distinguishes TPS62751DSKR from TPS62750DSKR in USB applications?
The TPS62751DSKR operates exclusively in forced PWM mode, ensuring constant 2.25 MHz switching and predictable EMI - unlike the TPS62750DSKR, which transitions to PFM at light loads. This makes the TPS62751DSKR ideal for noise-sensitive RF/baseband subsystems in USB modems where spectral purity is critical. Both share identical pinout, current-limit programming, and USB compliance features.
How is the average input current limit programmed on TPS62751DSKR?
The TPS62751DSKR uses two external resistors - one connected to ISET_L (Pin 7) for 50–300 mA range, another to ISET_U (Pin 8) for 300–1300 mA range - with the H/L pin (Pin 3) selecting between them. The limit accuracy is ±10%, and equations in the SLVS955A datasheet define exact resistor values based on target current and reference voltage.
Does TPS62751DSKR provide reverse-current protection during shutdown?
Yes. When EN is pulled low, the TPS62751DSKR disables both high-side and low-side MOSFETs and isolates the input from output, preventing reverse current flow from VOUT back to VIN - a mandatory feature for USB compliance. This is distinct from body-diode conduction and is actively controlled by the internal gate drivers.
What is the purpose of the AVIN and PVIN pins on TPS62751DSKR?
TPS62751DSKR separates power domains: PVIN (Pin 9) supplies the power stage (MOSFET drivers), while AVIN (Pin 10) supplies the analog control circuitry (error amp, reference, comparators). AVIN must be tied to PVIN with a low-inductance connection to minimize noise coupling - this separation improves regulation accuracy and transient response under dynamic load conditions.
Can TPS62751DSKR support output voltages below 0.8 V?
No. The TPS62751DSKR's feedback reference is fixed at 0.6 V, and its adjustable output range is specified as 0.8 V to 0.85 × VIN. Attempting to set VOUT < 0.8 V violates the minimum FB voltage constraint and results in regulation failure. For sub-0.8 V outputs, a different converter with lower reference voltage or external reference injection is required.
TPS62751DSKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, USB
- Voltage - Input:
- 2.9V ~ 6V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.8V ~ 5.1V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (2.5x2.5)
TPS62751DSKR FAQ
1.How can I place an order for TPS62751DSKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62751DSKR 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 TPS62751DSKR reliable?
The price and inventory of TPS62751DSKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62751DSKR is usually 5 days.
3.What payment methods are accepted for TPS62751DSKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62751DSKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62751DSKR?
TPS62751DSKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62751DSKR 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 TPS62751DSKR?
For technical support, including TPS62751DSKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62751DSKR requirements.
6.How does Aetrix verify that TPS62751DSKR is sourced from the original manufacturer or authorized distributors?
All TPS62751DSKR 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 TPS62751DSKR meets industry standards.
7.What is the process for return or replacement of TPS62751DSKR?
All TPS62751DSKR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62751DSKR, 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 TPS62751DSKR part is unused and in its original packaging.
Return procedure for TPS62751DSKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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