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TPS2557DRBR

Adjustable current-limited power switch, 0.5-5A, 50mOhm, USB compliant, VSSOP-8

10200

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Pieza del fabricante：

TPS2557DRBR

Paquete：

VSSOP-8 (3.0 x 3.0 mm, HRI package)

Marca：
Categorías de productos：
Compromiso de calidad
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Descripción

Productos

The TPS2557DRBR is a precision adjustable current-limited power-distribution switch from Texas Instruments with 0.5A to 5A current limit range, 50 mOhm RDS(ON), and USB 2.0 compliance in an 8-pin VSSOP package.

Especificaciones

Current Limit Range 0.5 A to 5 A (adjustable via external resistor)
Current Limit Accuracy ±6% at 2A setting
RDS(ON) 50 mOhm typical
Input Voltage Range 2.5 V to 6.5 V
UVLO Threshold 2.2 V (falling)
Enable Input Active high, compatible with 1V logic
Fault Reporting Open-drain FAULT output
Thermal Shutdown Auto-retry after thermal fault
Reverse Current Blocking Yes (when disabled)
Temperatura de funcionamiento -40°C to +125°C
Paquete VSSOP-8 (3.0 x 3.0 mm)

Características

  • Precision adjustable current limit: 0.5A to 5A
  • Low 50 mOhm RDS(ON) MOSFET switch
  • USB 2.0 compliant with 500 mA and 900 mA settings
  • Auto-retry thermal shutdown protection
  • Reverse current blocking when disabled
  • Open-drain fault reporting output
  • 1V logic-compatible enable input
  • Undervoltage lockout (UVLO)

Aplicaciones

  • USB power distribution
  • Hot-plug power supplies
  • Laptop and notebook USB ports
  • Industrial power distribution
  • Battery-powered load switches

The TPS2557DRBR is a precision adjustable current-limited power-distribution switch from Texas Instruments featuring an N-channel MOSFET with 50 mOhm on-resistance and programmable current limit from 0.5A to 5A via an external resistor. The device meets USB 2.0 current limit requirements and provides comprehensive protection including thermal shutdown with auto-retry, undervoltage lockout, and reverse current blocking when the switch is disabled. The open-drain FAULT output reports overcurrent and thermal fault conditions. The 1V logic-compatible enable input allows direct interface with low-voltage microcontrollers. The device operates from 2.5V to 6.5V in the compact VSSOP-8 package suitable for USB port protection and general power distribution applications.

The TPS2557 uses an N-channel MOSFET as the main pass element, driven by an internal charge pump that ensures the gate voltage is sufficient for low RDS(ON) even at the minimum 2.5V input. The current limit circuit senses the MOSFET current and compares it against a reference set by the external RILIM resistor. When the current exceeds the limit, the control loop reduces the gate drive to regulate the current at the set limit, rather than immediately shutting off. This provides a constant-current limiting behavior that allows the output to recover when the overload is removed. If the current-limit condition persists and causes excessive power dissipation, the thermal shutdown activates at approximately 140°C and the switch turns off. After the junction cools by approximately 20°C, the switch automatically retries, cycling on and off until the fault clears. The FAULT open-drain output pulls low during overcurrent and thermal fault conditions.

Pin Nombre Tipo Descripción
1 OUT Potencia Switch output (connects to load)
2 ILIM Analógico Current limit set (connect resistor to GND)
3 GND Potencia Suelo
4 ES Entrada Enable (active high, 1V logic compatible)
5 FALLO Salida Fault indicator (open-drain, active low)
6 NC - Sin conexión
7 EN Potencia Switch input (2.5-6.5V)
8 OUT Potencia Switch output (connected to pin 1 internally)
  • USB Port Protection: Adjustable 0.5-5A current limit meets USB 2.0 500mA/900mA requirements with ±6% accuracy
  • Hot-Plug Supplies: Current limiting and thermal shutdown protect against inrush current and short circuits during hot-plug events
  • Laptop USB Ports: 50 mOhm RDS(ON) minimizes voltage drop; FAULT output enables port status reporting to host controller
  • Industrial Distribution: Reverse current blocking prevents backfeed when a powered port is disabled or input voltage drops
  • Battery Load Switches: 1V-compatible enable input and 2.5V minimum operation suit single-cell Li-Ion powered systems
Modelo Fabricante Diferencia clave
TPS2556DRBR TI Fixed 1.1A current limit version
TPS2552DRVR TI 0.5-1.5A range, SOT-23-6, smaller
TPS2549RTER TI USB charging port controller + switch
FDC6327L onsemi Load switch, smaller current range
AP2145SG-13 Diodos Inc Adjustable current limit, SOT-23-6
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Envíos y pagos

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Servicio y embalaje

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

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Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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