Load Switches and Surge Protection for Power Management Designers

The NX5P3090 is a precision adjustable current-limited power switch for USB PD application. The device includes under voltage lockout, over-temperature protection, and reverse current protection circuits to automatically isolate the switch terminals when a fault condition occurs. The 29V tolerance on VBUS pin ensures the device is able to work on a USB PD port; a current limit input (ILIM) pin defines the over-current limit threshold; an open-drain fault output (FAULT) indicates when a fault condition has occurred.

The over-current limit threshold can be programmed from 400 mA to 3.3 A, using an external resistor between the ILIM pin and GND pin. In the over current condition, the device will clamp the output current to the value set by ILIM and keep the switch on while assert the FAULT flag. To minimize current surges during turn on and turn off, the device has built in soft start which controls the power switch rise and fall time.

Surge protection has been integrated in the device to enhance system robustness. The enable input includes integrated logic level translation making the device compatible with lower voltage processors and controllers.

NX5P3090 is offered in a 12 bump 1.35 × 1.65 mm, 0.4 mm pitch WLCSP package.

The NX5P2924C is a high-side load switch which features a low ON resistance N-channel MOSFET with controlled slew rate that supports 2.5 A of continuous current. Designed for operation from 0.8 V to 5.5 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. An output pull-down transistor has been integrated for fast discharge of capacitive load. The enable logic includes integrated logic level translation making the device compatible with lower voltage processors and controllers. The NX5P2924C is ideal for portable, battery-operated applications due to low ground current.

The NX5P2925CUKZ is a high-side load switch which features a low ON resistance N-channel MOSFET with controlled slew rate that supports 2.5 A of continuous current. Designed for operation from 0.8 V to 5.5 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation making the device compatible with lower voltage processors and controllers. The NX5P2925CUKZ is ideal for portable, battery-operated applications due to low ground current.

NX5P2925CUKZ features reverse current protection (RCP) circuits. If VOUT exceeds VIN by 25 mV, the RCP circuit isolates VOUT from VIN, preventing damage to devices on the input side of the switch.

The NX20P5090 is an advanced 5.0 A Uni-directional power switch for USB PD. It includes undervoltage lockout, overvoltage lockout, reverse current protection and over-temperature protection circuits. It is designed to automatically isolate the power switch terminals when a fault condition occurs. Both VBUS and VINT pin have 29 V tolerance in shutdown mode. Two NX20P5090s can be used in parallel to support dual power inputs connecting to the same charging circuit.

The device has a default 23 V over-voltage protection threshold, and the OVP threshold can be adjusted by using external resistors on OVLO pin. A 15 ms debounce time is deployed every time before the device is switched ON, followed by a soft start to limit the inrush current.

Designed for operation from 2.5 V to 20.0 V, it is used in USB PD power domain isolation applications to offer essential protection and enhance reliability.

NX20P5090 is offered in a small 15 bumps 1.6 × 2.6 mm, 0.5 mm pitch WLCSP package.

The NX5P3201 is an advanced dual power switch consisting of two independent switches. They are, an advanced 3 A bidirectional power switch (SWP) for USB OTG and charger port applications, and a high-side 6 A load switch (SW5).

SWP includes an open-drain status indicator. It also consists of OverTemperature Protection (OTP), UnderVoltage LockOut (UVLO) and OverVoltage LockOut (OVLO) protection circuits. The OVLO circuit isolates the pin VBUS when more than 6.55 V is applied to pin VBUS via the USB connector. To prevent unnecessary switching due to ringing on pins VBUS or PMU, the UVLO circuits include a 15 ms turn-on delay. This deglitch function allows the applied voltage to stabilize above VUVLO before closing SWP.

SW5 consists of OTP, Reverse Current Protection (RCP), and UVLO protection circuits. The UVLO isolates VBAT from VIN until VI exceeds VUVLO. If the voltage at VBAT exceeds VI by 30 mV, the RCP circuit isolates VBAT from VIN. It prevents damage to devices on the input side of the switch.

Both switches include slew rate controlled inrush current reduction to prevent damage when switching high capacitive loads.

The NX5P2190 is an advanced power switch with adjustable current limit. It includes undervoltage and overvoltage lockout, over-current, over-temperature, reverse bias and in-rush current protection circuits. These circuits are designed to isolate a voltage source from a VBUS interface pin automatically when a fault occurs. The device features two power switch terminals, one input (VINT) and one output (VBUS). A current limit input (ILIM) defines the over-current and in-rush current limit, and a voltage detect output (VDET) monitors the voltage level on VBUS. An open-drain fault output (FAULT) indicates when a fault condition occurs. An enable input (EN) controls the state of the switch. When EN is set LOW the device enters a low-power mode, disabling all protection circuits except the undervoltage lockout. The low-power mode can be entered at any time unless the over-temperature protection circuit has been triggered.

Designed for operation from 3 V to 5.5 V, the NX5P2190 is a complete solution for power domain isolation and protection applications. The enable input includes integrated logic level translation making the device compatible with lower voltage processors and controllers.

The NX3P190 is a high-side load switch which features a low ON resistance P-channel MOSFET that supports more than 500 mA of continuous current. Designed for operation from 1.1 V to 3.6 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX3P190 is ideal for portable, battery-operated applications due to low ground current and ultra-low shutdown current.

The NX3P191 is a high-side load switch which features a low ON resistance P-channel MOSFET with input inrush current reduction that supports more than 500 mA of continuous current and an integrated output discharge resistor to discharge the output capacitance when disabled. Designed for operation from 1.1 V to 3.6 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX3P191 is ideal for portable, battery-operated applications due to low ground current and ultra-low shutdown current.

The NX3P2902B is a high-side load switch which features a low ON resistance P-channel MOSFET. The MOSFET supports more than 500 mA of continuous current and an integrated output discharge resistor to discharge the output capacitance when disabled. Designed for operation from 1.1 V to 3.6 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX3P2902B is ideal for portable, battery-operated applications due to low ground current and OFF-state current.

The NX3P1108 is a high-side load switch which features a low ON resistance P-channel MOSFET that supports more than 1.5 A of continuous current. It has an integrated output discharge resistor to discharge the output capacitance when disabled. Designed for operation from 0.9 V to 3.6 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX3P1108 is ideal for portable, battery-operated applications due to low ground current and ultra-low OFF-state current.

The NX5P1000 is an advanced power switch and ESD-protection device for USB OTG applications. The device includes undervoltage and overvoltage lockout, over-current, over-temperature, reverse bias and in-rush current protection circuits. These circuits are designed to isolate a VBUS OTG voltage source automatically from a VBUS interface pin when a fault condition occurs. The device features two power switch terminals, one input (VINT) and one output (VBUS). It has a current limit input (ILIM) for defining the over-current and in-rush current limit. A voltage detect output (VDET) is used to determine when VINT is in the correct voltage range. An open-drain fault output (FAULT) indicates when a fault condition has occurred and an enable input (EN) controls the state of the switch. When EN is set LOW the device enters a low-power mode, disabling all protection circuits except the undervoltage lockout. The low-power mode can be entered at any time unless the over-temperature protection circuit has been triggered.

Designed for operation from 3 V to 5.5 V, it is used in power domain isolation applications to protect from out of range operation. The enable input includes integrated logic level translation, making the device compatible with lower voltage processors and controllers.

The NX5P1100 is an advanced power switch and ESD-protection device for USB OTG applications. It includes undervoltage and overvoltage lockout, over-current, over-temperature, reverse bias and in-rush current protection circuits. These circuits are designed to isolate a VBUS OTG voltage source from a VBUS interface pin automatically when a fault condition occurs. The device features two power switch terminals, one input (VINT) and one output (VBUS). It has a current limit input (ILIM) for defining the over-current and in-rush current limit. A voltage detect output (VDET) is used to determine when VINT is in the correct voltage range. An open-drain fault output (FAULT) indicates when a fault condition has occurred, and an enable input (EN) controls the state of the switch. When EN is set LOW the device enters a low-power mode, disabling all protection circuits except the undervoltage lockout. The low-power mode can be entered at any time unless the over-temperature protection circuit has been triggered.

Designed for operation from 3 V to 5.5 V, it is used in power domain isolation applications to protect from out of range operation. The enable input includes integrated logic level translation, making the device compatible with lower voltage processors and controllers.

The NX5P2924 is a high-side load switch which features a low ON resistance N-channel MOSFET with controlled slew rate that supports 2.5 A of continuous current. Designed for operation from 0.8 V to 5.5 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX5P2924 is ideal for portable, battery-operated applications due to low ground current.

The NX5P2924B is a high-side load switch which features a low ON resistance N-channel MOSFET with controlled slew rate that supports 2.5 A of continuous current. Designed for operation from 0.8 V to 5.5 V, it is used in power domain isolation applications to reduce power dissipation and extend battery life. The enable logic includes integrated logic level translation, making the device compatible with lower voltage processors and controllers. The NX5P2924B is ideal for portable, battery-operated applications due to low ground current.

The NX5P3001 is an advanced bidirectional power switch and ESD-protection device for combined USB OTG and charger port applications. It includes undervoltage lockout, over-voltage lockout and over-temperature protection circuits designed to automatically isolate the power switch terminals when a fault condition occurs.

The device features two power switch input/output terminals (VBUSI and VBUSO), an open-drain acknowledge output (ACK), an enable input which includes logic level translation (EN) and low-capacitance Transient Voltage Suppression (TVS)-type ESD clamps for USB data and ID pins.

When EN is set HIGH the device enters a low-power mode, disabling all protection circuits. When used in combined charger and USB OTG applications the 30 V tolerant VBUSI switch terminal is used as the supply and switch input when charging, for USB OTG the VBUSO switch terminal is used as the supply and switch input.

Designed for operation from 3.2 V to 6.35 V, it is used in battery charging and power domain isolation applications to reduce power dissipation and extend battery life.

The NX5P2090 is an advanced power switch for USB OTG applications. The device includes undervoltage and overvoltage lockout, over-current, over-temperature, reverse bias and in-rush current protection circuits designed to automatically isolate a VBUS OTG voltage source from a VBUS interface pin when a fault condition occurs. The device features two power switch terminals, one input (VINT) and one output (VBUS); a current limit input (ILIM) for defining the over-current and in-rush current limit; a voltage detect output (VDET) to monitor the voltage level on VBUS; an open-drain fault output (FAULT) to indicate when a fault condition has occurred and an enable input (EN) to control the state of the switch. When EN is set LOW the device enters a low-power mode, disabling all protection circuits accept the undervoltage lockout. The low-power mode can be entered at any time unless the over-temperature protection circuit has been triggered.

Designed for operation from 3 V to 5.5 V, it is used in power domain isolation applications to protect from out of range operation. The enable input includes integrated logic level translation, making the device compatible with lower voltage processors and controllers.

The NX18P3001 is an advanced bidirectional power switch and ESD-protection device for combined USB-OTG and charger port applications. It includes undervoltage lockout, over-voltage lockout and over-temperature protection circuits designed to automatically isolate the power switch terminals when a fault condition occurs.

The device features two power switch input/output terminals (VBUSI and VBUSO), an open-drain acknowledge output (ACK), an enable input which includes logic level translation (EN) and low-capacitance Transient Voltage Suppression (TVS)-type ESD clamps for USB data and ID pins.

When EN is set HIGH the device enters a low-power mode, disabling all protection circuits. When used in combined charger and USB-OTG applications the 30 V tolerant VBUSI switch terminal is used as the supply and switch input when charging, for USB-OTG the VBUSO switch terminal is used as the supply and switch input.

Designed for operation from 3.2 V to 17.5 V, it is used in battery charging and power domain isolation applications to reduce power dissipation and extend battery life.