RT9725A Datasheet, PDF (1/17 Pages) Richtek Technology Corporation – Express Card Power Interface Switch

RT9725A/B
Express Card Power Interface Switch
General Description
The RT9725A/B power distribution switches are designed
to fulfill power management requirements of Express Card
specification. The RT9725A/B supports systems with
single slot ExpressCard|34 and ExpressCard|54 socket.
The device distributes 3.3V, AUX and 1.5V to the Express
Card socket. Each power rail is protected with current
limit circuitry when output load exceeds over-current
threshold or short-circuits occurs. A thermal protection
circuit turns off switches to prevent the device from damage
when power dissipation is increased by continuous heavy
overloads or short-circuits in the switches. The
RT9725A/B is available in WQFN-20L 3x3 package.
Features
z Meets Express Card Standard (ExpressCard|34 and
ExpressCard|54)
z Compliant with the Express Card Compliance
Check Lists, Compliance ID : EC100328
z Fully Satisfy the Express Card Implementation
Guidelines
z Supports Systems with WAKE Function
z TTL-Logic Compatible Input
z Under-Voltage Lockout Protection
z Over Current Protection
z Over Temperature Protection
z RoHS Compliant and Halogen Free
Ordering Information
Applications
RT9725A/B
z PCs
Package Type
QW : WQFN-20L 3x3 (W-Type)
z PDAs
z Digital Cameras
Lead Plating System
z TV and Set Top Boxes
G : Green (Halogen Free and Pb Free)
Note :
SYSRST Pull High Resistor
A : With Internal Resistor
B : Without Internal Resistor
Pin Configurations
(TOP VIEW)
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.
Marking Information
For marking information, contact our sales representative
STBY 1
3.3VIN 2
3.3VOUT 3
NC 4
NC 5
20 19 18 17 16
GND
21
15 AUXOUT
14 NC
13 NC
12 1.5VIN
11 1.5VOUT
6 7 8 9 10
directly or through a Richtek distributor located in your
area.
WQFN-20L 3x3
DS9725A/B-01 April 2011
www.richtek.com
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