The TPS2044 and TPS2054 quad power-
●distribution switches are intended for applications where heavy capacitive loads and short circuits
●are likely to be encountered. Both the TPS2044 and the TPS2054 incorporate in a single package four 135-m N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches. Each switch is controlled by a logic enable that is compatible with 5-V logic and 3-V logic. Gate drive is provided by an internal charge pump that controls the power-switch rise times and fall times to minimize current surges during switching. The charge pump, requiring no external components, allows operation from supplies as low as 2.7 V.
●When the output load exceeds the current-limit threshold or a short is present, the TPS2044 and TPS2054 limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx\\) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch remains off until valid input voltage is present.
●The TPS2044 and TPS2054 are designed to limit at 0.9-A load. These power-distribution switches are available in 16-pin small-outline integrated-circuit (SOIC) packages and operate over an ambient temperature range of -40°C to 85°C.
●The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2044DR)
● 135-m -Maximum (5-V Input) High-Side MOSFET Switch
● 500 mA Continuous Current per Channel
● Short-Circuit Protection
● Independent Thermal Protection
● Overcurrent Logic Output
● Operating Range...2.7-V to 5.5-V
● Logic-Level Enable Input
● 2.5-ms Typical Rise Time
● Undervoltage Lockout
● 20-uA-Maximum Standby Supply Current
● Bidirectional Switch
● 16-pin SOIC Package
● Ambient Temperature Range, -40°C to 85°C
● 2-kV Human-Body-Model, 200-V Machine-Model ESD Protection
