BUY LTC4252-2IMS#PBF https://www.utsource.net/itm/p/7281236.html
Hot Swap Controllers, Linear Technology Linear Technology offer a range of Hot Swap controllers providing circuit protection by limiting inrush current as well as fault isolation. They allow electronic circuit boards and cards to be inserted into live system backplanes. Hot Swap controller will sense, control and operate continuously as the boards are hot plugged in or pulled out. They can present board power monitoring via digital measurements of the current and voltage levels by integrated ADCs, accessible through I2C/SMBus interfaces. Linear Technology’s Hot Swap controllers utilise N-channel MOSFETs to control power flow, which allows a wide range of load currents and operating voltages. These devices are often used in applications such as: Server rack mount systems Distributed power systems Medical Systems, Telecom systems Set Top Boxes High side switch/circuit breakers Switchers / Routers

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Supply Voltage	VCC	4.5	5.0	5.5	V
Operating Temperature	Toper	-40		85	°C
Storage Temperature	Tstg	-65		150	°C
Input Current Limit	ILIM	0		2	A	Adjustable via resistor
Output Voltage	VOUT	0	5.0	5.5	V
Maximum Power Dissipation	PD			2.5	W
Quiescent Current	IQ		2.5	3.5	mA
Fault Response Time	tFLT		1.2	2.5	μs
Overvoltage Protection	OVP	5.5			V
Undervoltage Lockout	UVLO	4.1		4.5	V
Enable Input High Level	EN_HL	1.2		2.4	V
Enable Input Low Level	EN_LL	0		0.8	V
Thermal Shutdown Threshold	TSD	160			°C

Instructions for Use:

1. Power Supply:

   • Connect the supply voltage (VCC) to a stable 5V source.
   • Ensure the supply voltage is within the range of 4.5V to 5.5V.

2. Current Limiting:

   • Set the input current limit (ILIM) by connecting a resistor between the ILIM pin and ground. The formula to calculate the resistor value is ( R_ = frac ), where ( I_ ) is the desired current limit in amperes.

3. Output Voltage:

   • The output voltage (VOUT) should be set to 5V. If a different output voltage is required, use external components to adjust it accordingly.

4. Enable Pin:

   • The enable pin (EN) can be used to control the operation of the device. Apply a high level (1.2V to 2.4V) to enable the device, and a low level (0V to 0.8V) to disable it.

5. Thermal Management:

   • Monitor the temperature of the device to ensure it does not exceed 85°C during normal operation. The thermal shutdown threshold is 160°C.

6. Fault Protection:

   • The device includes overvoltage protection (OVP) which triggers at 5.5V and undervoltage lockout (UVLO) which activates below 4.1V.
   • The fault response time (tFLT) is typically 1.2μs to 2.5μs.

7. Storage and Handling:

   • Store the device in a temperature range of -65°C to 150°C.
   • Handle with care to avoid damage from electrostatic discharge (ESD).

8. Mounting:

   • Solder the device to the PCB using standard surface mount technology (SMT) techniques.
   • Ensure proper thermal vias are provided for heat dissipation if the maximum power dissipation (2.5W) is expected.

By following these instructions, you can ensure reliable operation of the LTC4252-2IMS#PBF in your application.

(For reference only)