onsemi FPF2165

FPF2163, FPF2164, and FPF2165 are a family of load switches providing comprehensive protection for systems and loads under high-current conditions. Each device integrates a 0.12Ω current-limiting P-channel MOSFET operating over an input voltage range of 1.8–5.5V. A reverse-current blocking feature prevents current flow when the MOSFET is off and the output voltage exceeds the input voltage. Switching is controlled via a logic input (ON) compatible with low-voltage control signals. All devices include a thermal shutdown function that turns off the switch during sustained overcurrent conditions causing overheating, thereby preventing component damage. When the switch current reaches the current limit, the device operates in constant-current mode to prevent damage from excessive current. For FPF2163 and FPF2164, if the constant-current condition persists for more than 30ms, the device turns off the switch and pulls the fault signal pin (FLAGB) low. FPF2163 features auto-restart: if the ON pin remains asserted after 450ms, the switch turns on again. FPF2164 does not have auto-restart, so the switch remains off until the ON pin is cycled. FPF2165 does not shut down upon a current-limit fault but continues operating in constant-current mode. The minimum current limit is 150mA. These devices are available in a space-saving 6-pin 2X2MLP package.

FPF2163, FPF2164, and FPF2165 are current-limiting switches that protect systems and loads from damage in high-current applications. At the core of each device is a 0.12Ω P-channel MOSFET paired with a controller operating over a wide supply voltage range of 1.8–5.5V. The controller safeguards the system against failures through current limiting, undervoltage lockout, and thermal shutdown. The current limit is adjustable from 150mA to 1.5A by selecting the appropriate external resistor value.

• Input voltage range: 1.8 - 5.5V
• Controllable turn-on
• 0.15－1.5A adjustable current limit
• Undervoltage lockout
• Thermal shutdown < 2μA shutdown current
• Auto-restart
• Fast current limiting response time: 5μs moderate overcurrent, 30ns hard short circuit
• Fault blanking
• Reverse current blocking
• RoHS compliant
• These are Pb-Free Devices

• PDA
• Mobile phones
• GPS devices
• MP3 players
• Digital cameras
• Peripheral ports
• Hot-swap power supplies