RT9702_11 Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – 80mΩ, 500mA/1.1A High Side Power Switches with Flag

RT9702/A
80mΩ, 500mA/1.1A High Side Power Switches with Flag
General Description
Features
The RT9702 and RT9702A are cost-effective, low voltage,
single N-Channel MOSFET high-side power switches,
optimized for self-powered and bus- powered Universal
Serial Bus (USB) applications. The RT9702/A equipped
with a charge pump circuitry to drive the internal MOSFET
switch; the switch's low R_DS(ON), 80mΩ, meets USB
voltage drop requirements; and a flag output is available
to indicate fault conditions to the local USB controller.
Additional features include soft-start to limit inrush current
during plug-in, thermal shutdown to prevent catastrophic
switch failure from high current loads, under-voltage
lockout (UVLO) to ensure that the device remains off
unless there is a valid input voltage present, fault current
is limited to typically 800mA for RT9702 in single port and
1.5A for RT9702A in dual ports in accordance with the
USB power requirements, lower quiescent current as 25μA
making this device ideal for portable battery-operated
equipment.
The RT9702/A is available in SOT-23-5 and TSOT-23-5
packages requiring minimum board space and smallest
components.
z Compliant to USB Specifications
z Built-In (Typically 80mΩ) N-Channel MOSFET
z Output Can Be Forced Higher Than Input (Off-State)
z Low Supply Current :
25uA Typical at Switch On State
1uA Typical at Switch Off State
z Guaranteed 500mA/RT9702 and 1.1A/RT9702A
Continuous Load Current
z Wide Input Voltage Ranges : 2V to 5.5V
z Open-Drain Fault Flag Output
z Hot Plug-In Application (Soft-Start)
z 1.7V Typical Under Voltage Lockout (UVLO)
z Current Limiting Protection
z Thermal Shutdown Protection
z Reverse Current Flow Blocking (no body diode)
z Smallest SOT-23-5 and TSOT-23-5 Packages
Minimizes Board Space
z UL Approved−E219878
z TUV IEC60950-1 : 2005 Certified
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
RT9702/A
Package Type
B : SOT-23-5
J5 : TSOT-23-5
z USB Bus/Self Powered Hubs
z USB Peripherals
z ACPI Power Distribution
z PC Card Hot Swap
z Notebook, Motherboard PCs
Lead Plating System
z Battery-Powered Equipment
P : Pb Free
z Hot-Plug Power Supplies
G : Green (Halogen Free and Pb Free) _{z Battery-Charger Circuits}
1.1A Output Current
Note :
500mA Output Current
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
` Suitable for use in SnPb or Pb-free soldering processes.
DS9702/A-15 April 2011
www.richtek.com
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