AP2156SG-13 Diodes Zetex, AP2156SG-13 Datasheet - Page 15

• Manufacturer Part Number: AP2156SG-13
• Manufacturer: Diodes Zetex

Specifications of AP2156SG-13

• Usb Power Switch Type: High Side Switch
• Short Circuit Current Limit: 800mA
• Input Voltage Range: 2.7 to 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOP
• Lead Free Status / RoHS Status: Compliant

Application Note
Generic Hot-Plug Applications
In many applications it may be necessary to remove modules or pc boards while the main unit is still
operating. These are considered hot-plug applications. Such implementations require the control of current
surges seen by the main power supply and the card being inserted. The most effective way to control these
surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in
which a power supply normally turns on. Due to the controlled rise times and fall times of the
AP2146/AP2156, these devices can be used to provide a softer start-up to devices being hot-plugged into a
powered system. The UVLO feature of the AP2146/AP2156 also ensures that the switch is off after the card
has been removed, and that the switch is off during the next insertion.
By placing the AP2146/AP2156 between the V
these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow
voltage ramp at the output of the device. This implementation controls system surge current and provides a
hot-plugging mechanism for any device.
Marking Information
(1) SOP-8L
(2) MSOP-8L-EP
AP2146/AP2156 Rev 2
4 : Active Low
5 : Active High
Part Number
4 : Active Low
5 : Active High
Part Number
Logo
Logo
(Continued)
8
1
AP21X X
( Top view )
8
1
AP21X X
YY WW X X
7
2
( Top view )
www.diodes.com
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
7
2
Y W X E
CC
3
6
15 of 17
input and the rest of the circuitry, the input power reaches
6
3
4
5
5
4
MSOP-8L-EP
W : Week : a~z : 1~26 week;
6 : 2 Channel
A~Z : Green
Y : Year : 0~9
A~Z : 27~52 week; Z represents
52 and 53 week
6 : 2 Channel
G : Green
YY : Year : 08, 09,10~
WW : Week : 01~52; 52
represents 52 and 53 week
X : Internal Code
AP2146/AP2156
©
DECEMBER 2009
Diodes Incorporated
SWITCH