NCP305LSQ24T1

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PMIC (Power Management IC) Supervisors play a key role in modern electronic designs, providing protection against current or voltage overloads. The NCP305LSQ24T1 is a low-cost, low-power supervisor specifically designed for protecting low-voltage single-supply applications. It features a temperature range of -20°C to +85°C and an input voltage range of +2.2V to +5.5V. The device’s 24 mA current limiting capability is ideal for protecting devices against current surges and over-driving. The NCP305LSQ24T1 is designed to be mounted on form-in-place PCB assemblies and requires only a small footprint on the board.

When power is applied to the NCP305LSQ24T1, a 3.3V output is generated with a tolerance of ± 10%. This output is used to power the connected load and is also connected to the device’s temperature sensor, protecting against over-temperature conditions. The supervisor’s brown-out Reset (BOR) circuit will monitor the output voltage and assert a reset signal if the voltage falls below 3.2V.

In addition to temperature and voltage protection, the NCP305LSQ24T1 provides additional features to protect against power supply voltage transient events. It has a 200V IEC61000-4-2 ESD (electrostatic discharge) guard pin with the ability to protect against voltage transients up to ±20V (clamping voltage). The device also provides protection against overvoltage conditions through its integrated “Active Load Discharge (ALD)” circuits.

The NCP305LSQ24T1’s low-profile, miniature design is ideal for space-constrained applications such as Point-of-Sale terminals, industrial controls, and consumer electronics. It can also be used in hand-held, automated test equipment, remote monitoring devices, and general-purpose power supply management circuits.

The working principle of the NCP305LSQ24T1 is based on the use of a voltage limiter. The voltage limiter works by comparing the voltage sensed by the device’s temperature sensor to the input voltage. The device will then limit the output current to the safe value determined by the temperature sensor. The device is designed to be connected to the application’s power supply and will monitor the output current and limit it as needed. If the device detects an overvoltage condition, it will shut off the power to the load and indicate an alarm signal to the user.

The NCP305LSQ24T1 is a low-cost, low-power supervisor specifically designed for protecting low-voltage single-supply applications. Its low-profile, miniature design makes it ideal for space-constrained applications and its integrated protection features protect against current, temperature, and voltage transients. Its 3.3V output with ± 10% tolerance provides the necessary power for connected loads and serves as a temperature sensor for over-temperature protection. Its integrated Active Load Discharge (ALD) circuits also provide protection against overvoltage conditions.

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