TPD3S014

Part: TPD3S014 / TPD3S044 (TPD3S0x4) — Texas Instruments

Type: Current-Limited USB Load Switch with D+/D- ESD Protection

Description: 4.5–5.5 V input USB power switch with 0.5 A (TPD3S014) or 1.5 A (TPD3S044) continuous current ratings, fixed current limits of 0.85 A / 2.15 A (typ), and a two-channel IEC 61000-4-2 Level 4 ESD protection array for D+/D-.

Operating Conditions:

• Supply voltage (VIN): 4.5–5.5 V
• Operating junction temperature: -40 to 125 °C (ambient range listed in Features: -40 to 85 °C)
• Continuous output current: 0.5 A (TPD3S014), 1.5 A (TPD3S044)
• EN input: 0–5.5 V; VIH ≥ 2 V, VIL ≤ 0.7 V

Absolute Maximum Ratings:

• Input voltage (VIN, VOUT, EN, D1, D2): -0.3 to 6 V
• VIN to VOUT voltage: -6 to 6 V
• Junction temperature: internally limited
• Storage temperature: -65 to 150 °C

Key Specs:

• RDS(on) at 25 °C: 97 mΩ typ / 110 mΩ max (TPD3S014); 74 mΩ typ / 91 mΩ max (TPD3S044)
• RDS(on) over -40 to 125 °C: 154 mΩ max (TPD3S014); 121 mΩ max (TPD3S044)
• Current limit IOS (-40 to 125 °C): 0.65 / 0.85 / 1.05 A min/typ/max (TPD3S014); 1.60 / 2.15 / 2.70 A (TPD3S044)
• Short-circuit response time: 2 μs typ
• Supply current: 66 μA typ, 94 μA max enabled; 0.02 μA typ, 10 μA max disabled (-40 to 125 °C)
• UVLO rising threshold: 3.5 / 3.77 / 4 V min/typ/max; hysteresis 0.14 V typ
• Turn-on time: 1.6 ms typ (VIN = 5 V, CL = 1 μF, RL = 100 Ω)
• Thermal shutdown: 135 °C min in current limit, 155 °C min when not in current limit
• ESD pin capacitance (D1/D2 to GND): 1.4 pF typ; dynamic resistance 0.2 Ω
• ESD ratings: ±12 kV contact, ±15 kV air gap (VOUT, Dx pins)

Features:

• Fixed constant current limits of 0.85 A and 2.15 A (typ)
• Fast overcurrent response (2 μs)
• Integrated output discharge
• Reverse current blocking
• Short-circuit protection
• Over-temperature protection with auto-restart
• Built-in soft start
• UL recognized component (UL 2367); CB certificate to IEC 60950-1
• IEC 61000-4-2 Level 4 ESD protection on external pins

Applications:

• Electronic point of sale (ESOP)
• USB hubs
• Laptops and desktops
• High-definition digital TVs
• Set-top boxes
• USB ports and 5-V power rails

Package:

• DBV (SOT-23, 6 pins), 2.90 mm × 2.80 mm × 1.45 mm

• End Equipment:
• -Electronic Point of Sale (ESOP)
• -USB Hubs
• -Laptops, Desktops
• -High-Definition Digital TVs
• -Set-Top Boxes
• Interfaces:
• -USB Ports
• -5-V Power Rails

The TPD3S0x4s are integrated devices that feature a current-limited load switch and a two-channel transient voltage suppressor (TVS) based electrostatic discharge (ESD) protection diode array for USB interfaces.

The TPD3S0x4 devices are intended for applications such as USB where heavy capacitive loads and short-circuits are likely to be encountered; TPD3S0x4s provide short-circuit protection and overcurrent protection. The TPD3S0x4s limit the output current to a safe level by operating in constant current mode when the output load exceeds the current limit threshold. The fast overload response eases the burden on the main 5-V power supply by quickly regulating the power when the output is shorted. The rise and fall times for the current limit switch are controlled to minimize current surges when turning the device on and off.

The TPD3S014 and TPD3S044 will allow 0.5 A and 1.5 A of continuous current, respectively. The TVS diode array is rated to dissipate ESD strikes above the maximum level specified in the IEC 61000-4-2 international standard.

The high level of integration, combined with its easyto-route DBV package, allows this device to provide great circuit protection for USB interfaces in applications like laptops, high-definition digital TVs, set-top boxes, and electronic point of sale equipment.

1

• 2 GND

• 3 IN

6

5

• 4 OUT

EN

D2

D1

DBV Package 6-Pin SOT-23 Top View

Unless otherwise noted: VIN = 5 V, VEN = VIN, IOUT = 0 A. See Device Comparison Table for the rated current of each part number. Parametrics over a wider operational range are shown in the second Electrical Characteristics: -40°C ≤ TJ ≤ 125°C table.

over operating free-air temperature (unless otherwise noted) (1)(2)

over operating free-air temperature range (unless otherwise noted)

TPD3S0x4 are devices that feature a current limited load switch and a two-channel TVS based ESD protection diode array. They are typically used to provide a complete protection solution for USB host ports. USB host ports are required by the USB specification to provide a current limit on the VBUS path in order to protect the system from overcurrent conditions on the port that could lead to system damage and user injury. Additionally, USB ports typically require system level IEC ESD protection due to direct end-user interaction. The following design procedure can be used to determine how to properly implement TPD3S0x4s in your systems to provide a complete, one-chip solution for your USB ports.