AP1212LSL-13 Diodes Inc, AP1212LSL-13 Datasheet - Page 10

• Manufacturer Part Number: AP1212LSL-13
• Description: IC PWR SWITCH USB HISIDE 8-SOIC
• Manufacturer: Diodes Inc
• Type: USB Switchr

Specifications of AP1212LSL-13

• Number Of Outputs: 2
• Rds (on): 140 mOhm
• Internal Switch(s): Yes
• Current Limit: 1A
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AP1212LSLDITR

Functional Description
Error Flag
An open-drained output of N-channel MOSFET, the FLG output
is pulled low to signal the following fault conditions: input under
voltage, output current limit, and thermal shutdown.
Current Limit
The current limit threshold is preset internally. It protects the
output MOSFET switches from damage due to undesirable short
circuit conditions or excess inrush current often encountered
during hot plug-in. The low limit of the current limit threshold of
the AP1212 allows a minimum current of 0.5A through the
MOSFET switches. A current limit condition will signal the error
flag.
Thermal Shutdown
When the chip temperature exceeds 140ºC for any reason other
than over current fault of either one of the two MOSFET switches,
the thermal shutdown function turns off both MOSFET switches
and signals the error flag. A hysteresis of 10ºC prevents the
MOSFETs from turning back on until the chip temperature drops
to below 130ºC.
Enable
Before EN is asserted, a delay of 10ms minimum from when the
supply voltage, Vcc, becomes stable must be allowed.
AP1212 Rev. 8
DS31019
NEW DESIGN PLEASE USE
www.diodes.com
AP2146 OR AP2156
10 of 12
Supply Filtering
A 0.1µF to 1µF bypass capacitor from IN to GND, located near
the device, is strongly recommended to control supply transients.
Without a bypass capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to damage
internal control circuitry.
Transient Droop Requirements
USB applications support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input capacitance of
downstream device. Ferrite beads are recommended in series
with all power and ground connector pins. Ferrite beads reduce
EMI and limit the inrush current during hot-attachment by filtering
high-frequency signals.
Short Circuit Transient
Bulk capacitance provides the short-term transient current
needed
16V tantalum or 100µF, 10V electrolytic capacitor mounted close
to downstream connector per port should provide transient drop
protection.
Printed Circuit Layout
The power circuitry of USB printed circuit boards requires a
customized layout to maximize thermal dissipation and to
minimize voltage drop and EMI.
DUAL USB HIGH-SIDE POWER SWITCH
during
a
hot-attachment
event.
©
NOVEMBER 2010
AP1212
Diodes Incorporated
With
a
33µF,