RT9705 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – The RT9705 is a dual input single output power multiplexer

RT9705
80mΩ, 1A Power Multiplexer
General Description
The RT9705 is a dual input single output power multiplexer
specifically designed to provide seamless voltage transition
between two independent power suppliers. Equipped with
two low R_DS(ON) N-Channel MOSFETs driven by internal
charge pump circuitry, the RT9705 is able to deliver 1A
output current with only 80mV voltage drop. Manual or
auto switching mode is easily selected by two digital inputs
D1 and D0. When both D0 and D1 are selected high, the
RT9705 enters shutdown mode and consumes minimum
power making it ideal suitable for battery powered
equipments. A STAT pin with open drain output is provided
to indicate the switch status. A user-programmable up to
1.25A current limit function is available for maximum safety
in various applications.
The RT9705 provides comprehensive protection functions,
including adjustable current limit, over temperature
protection, soft start function for minimum inrush current,
cross-conduction protection, and reverse conduction
protection. These features greatly simplify power
multiplexer design. The RT9705 is available in TSSOP-8
package requiring minimum board area and smallest
components.
Ordering Information
RT9705
Package Type
C : TSSOP-8
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Features
z Adjustable Current Limiting up to 1.25A
z Built-In (Typically 80mΩ) N-MOSFET
z Reverse Current Flow Blocking (no body diode) i.e.
Output Can Be Forced Higher than Input (Off-State)
z Low Supply Current :
` 55uA Typical at Switch on State
` Less than 0.5uA Typical at Switch Off State
z Guaranteed 1A Continuous Load Current
z Wide Input Voltage Ranges : 2.8V to 5.5V
z Open-Drain STAT Output
z Hot Plug-In Application (Soft-Start)
z Thermal Shutdown Protection
z Smallest TSSOP-8 Package Minimizes Board Space
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z LCD Monitor, LCD-TV
z Information Appliance and Set-Top Box
z Battery-Powered Equipment
z ACPI Power Distribution
z Motherboard & Notebook PCs
z Mini PCI & PCI-Express Cards
z PCMCIA & New Cards
Pin Configurations
(TOP VIEW)
STAT
D0
D1
ILIM
8
2
7
3
6
4
5
TSSOP-8
VIN1
VOUT
VIN2
GND
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9705-07 April 2011
www.richtek.com
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