TPS2553

可调节限流配电开关

The TPS255x and TPS255x-1 power-distribution switches are intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered and provide up to 1.5 A of continuous load current. These devices offer a programmable current-limit threshold between 75 mA and 1.7 A typical through an external resistor. Current-limit accuracy as tight as ±6% can be achieved at the higher current-limit settings. The power-switch rise and fall times are controlled to minimize current surges during turnon and turnoff.

TPS255x devices limit the output current to a safe level by using a constant-current mode when the output load exceeds the current-limit threshold. TPS255x-1 devices provide circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. An internal reverse-voltage comparator disables the power-switch when the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT output asserts low during overcurrent and reverse-voltage conditions.

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Up to 1.5-A Maximum Load Current

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±6% Current-Limit Accuracy at 1.7 A Typical

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Meets USB Current-Limiting Requirements

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Backwards Compatible With TPS2550 and TPS2551

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Adjustable Current Limit: 75 mA to 1700 mA Typical

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Constant-Current TPS255x and Latch-Off TPS255x-1 Versions

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Fast Overcurrent Response - 2 µs Typical

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85-mΩ High-Side MOSFET DBV Package

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Reverse Input-Output Voltage Protection

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Operating Range: 2.5 V to 6.5 V

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Built-In Soft Start

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15-kV ESD Protection per IEC 61000-4-2 With External Capacitance

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UL Listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0

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See the Switch Portfolio