RYC8630-2M TE Connectivity, RYC8630-2M Datasheet - Page 7

• Manufacturer Part Number: RYC8630-2M
• Description: IC, DUAL HIGH SIDE POWER SW, 5.5V, SOIC8
• Manufacturer: TE Connectivity

Specifications of RYC8630-2M

• Power Load Switch Type: High Side
• Input Voltage: 5.5V
• Current Limit: 1.5A
• On State Resistance: 100mohm
• Thermal Protection: Yes
• On / Enable Input Polarity: Active Low
• No. Of Outputs: 2
• Rohs Compliant: Yes
• Internal Switch: Yes

FUNCTIONAL DESCRIPTION
The RYC86xx is a series of dual channel protected power switches designed for USB, SD Memory, and other 3.3V
to 5V high-side power switched applications. Each channel can be separately enabled and has a deglitched fault
flag to minimize nuisance tripping when high inrush current devices are plugged into the port. The output MOSFET
typically has a low on resistance of 100mΩ. The RYC86xx provides channel independent current limiting and
overtemperature protection. In an overcurrent event, the offending channel is turned off allowing normal operation
on the other channel. The RYC86xx features undervoltage lockout, soft start and reverse current blocking when
disabled.
Current Limit and Overtemperature
The RYC86xx is designed to support two power ports. The current limit is 0.6A minimum and 1.25A maximum for the
RYC8620, 0.7A minimum and 1.35A maximum for RYC8621 and 1.1A minimum and 2.2A maximum for the
RYC8630. When the current limit is exceeded, the device will first limit the current and then, if necessary, will go into
thermal shutdown when the die temperature reaches approximately 130°C. When the temperature falls 10°C below
the thermal shutdown temperature, the device will restart. If the fault has not been removed, the device will continue
to cycle on and off. The frequency of the cycle is dependent on the impedance of the fault and the thermal
environment. Each channel operates independently and in a fault event will be protected while allowing the other
channel to operate normally.
Enable Pull Up/Down
The EN input is logic level compatible. The enable pin should not be allowed to float; a pull-up/pull-down resistor
(depending on the polarity of the enable) should be used to tie the pin high/low.
The fault flag signal is asserted low when an overcurrent, overtemperature or undervoltage event occurs. In the
event of an overcurrent, the fault flag is deglitched for approximately 10 ms to minimize nuisance tripping. The
FLAG pin is an open drain design and will require a pull-up resistor.
Undervoltage lockout (UVLO)
If the supply voltage (V_aux) drops below approximately 2.0V the RYC86xx will turn off. The undervoltage limit
protects the hub from operating at voltages too low to assure reliable logic operation.
Soft Start
When the device is first enabled into a load, the device is turned on slowly and requires typically 0.5 ms to reach
90% of the operating voltage.
Tyco Electronics Corporation 308 Constitution Drive, Menlo Park, CA 94025 Tel: [phone] Fax: [phone]
RYC8620/21/30
Protected Power Switch
Fault Flag
Raychem
Power Management ICs
www.tycopowercomponents.com
Document: SCD 25389
Status: Released
Rev. E
Date: September 3, 2004
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