Protection IC Datasheet
© 2022 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: F.W.12/01/22
LS24062RQ23
28V 6A Bidirectional eFuse with Dual Port Independent Current Limit Setting
The LS24062RQ23 is an advanced 28V 6A rated bidirectional load
switch which provides overload, short circuit, input voltage surge,
excessive inrush current and over-temperature protections to
power the system. The built-in 24mΩ ultra low RDS(ON) power
switch helps reducing power loss during normal operation. The
device features two input/output ports, VBUS1 and VBUS2, which
are rated at 30V Absolute Maximum. Each port has independent
enable, external current limit setting and discharge control pins.
The integrated two N-channel power switch M1 and M2 in-series
configuration blocks any leakage between VBUS1 and VBUS2 two
ports when the device is disabled. The LS24062RQ23 is available
in low profile 16 leads QFN 2.5mm x 3.2mm package.
Features and Benefits
RoHS
Pb
Description
Applications
■ Wide Supply Voltage Range
from 3V to 24V
■ 30V Tolerance on Port VBUS1
and VBUS2
■ Integrate a 24mΩ Ultra Low
On Protection Switch
■ External Adjustable Soft-Start
Time
■ External Adjustable Input
Over-voltage Threshold
■ Short-circuit Protection
■ Fault Indicator
■ Thermal Shutdown Protection
and Auto Recovery
■ Each Port VBUS1/VBUS2
Independent Control
■ External Adjustable Current
Limit
■ Enable Interface Pin
■ Port Discharge Interface Pin
■ QFN 2.5mm×3.2mm_16L
Packages
■ Pb-Free and RoHS Compliant
■ UL/IEC 62368-1certification
■ Notebook, Desktop, Servers
and Tablets
■ Dongle and Docking Stations
■ Power Accessories
■ Thunderbolt / USB Type-C PD
power switch
Agency Agency File/Certificate Number
E528847
Agency Approvals
Protection IC Datasheet
© 2022 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: F.W.12/01/22
LS24062RQ23
28V 6A Bidirectional eFuse with Dual Port Independent Current Limit Setting
Pinout Designation
Pin #
Pin
Name
Description
1
ILIM2
Port VBUS2 current limit program pin. Program the current limit of power switch M2 (VBUS2 to MOUT) by connecting a
resister from ILIMT2 to ground. ILIM2 pin can’t be shorted to GND. If the system requires a single component fail safe,
use 2 resistor in series to program current limit.
2
DISC1
Port VBUS1 discharge control input. Pull Logic High discharges port VBUS1 to GND through an internal 190Ω pull down
resistor.
3
DISC2
Port VBUS2 discharge control input. Pull Logic High discharges port VBUS2 to GND through an internal 190Ω pull down
resistor.
4
EN1
Enable control input of the power switch M1 (VBUS1 to MOUT). Pull Logic High enables power switch M1, and pull
Logic Low disables the power switch M1. This pin has a pull-down resistor of typically 1MΩ when the device is disabled.
See Table 1 EN1 and EN2 Control Sequence.
5
EN2
Enable control input of the power switch M2 (VBUS2 to MOUT). Pull Logic High enables power switch M2 and pull Logic
Low disables the power switch M2. This pin has a pull-down resistor of typically 1MΩ when the device is disabled. See
Table 1 EN1 and EN2 Control Sequence.
6,16
VBUS1
Bidirectional Input/Output Port 1. Connect VBUS1 to power supply input or output to the load.
7, 1 5
MOUT
The N-type power switch M1 and M2 common drain output pin. Leave this pin float if it is not used. Although MOUT pin
can provide power to the other circuitry when EN1 or EN2 pin is pulled Logic High, need to pay extra attention when use
it. MOUT pin does NOT have short circuit protection due to the power switch M1 and M2 body diode, and the current
drawn from MOUT pin also affects current limit setting accuracy at ILIM1 or ILIM2 pin. See Application Notes how to
take power from the MOUT pin.
8,14
VBUS2
Bidirectional Input/Output Port 2. Connect VBUS2 to power supply input or output to the load.
9
FLTB
Fault event indicator open drain output pin. A pull-up resistor is connected from FLTB pin to any voltage less than 28V.
Active Low indicates input over-voltage, over-current and over-temperature fault events.
10
SS
Soft-start time program pin. Connect a capacitor to ground to program the soft start time.
11
ILIM1
Port VBUS1 current limit program pin. Program the current limit of switch M1 (VBUS1 to MOUT) by connecting a resister
from ILIMT1 to ground. ILIM1 pin can’t be shorted to GND. If the system requires a single component fail safe, use 2
resistor in series to program current limit.
12
VLIM
VBUS1 or VBUS2 Input over voltage protection threshold set pin. Program input over-voltage protection threshold (VOVP)
by connecting a resister to ground. Typical VOVP=12x10µAxRVLIM. Recommend to set input over-voltage protection
threshold range 5V to 24V.
13
GND
Ground pin.
1
5
3
2
4
687
16 1415
13
LS24062
9
11
12
10
SS
DISC1
VLIM
EN1
ILIM2
DISC2
ILIM1
FLTBEN2
GND
VBUS1MOUT VBUS2
VBUS1MOUT VBUS2