XC8114
3A Load Switch with Ideal Diode function
Perfect for OR connection applications, with low VF and true reverse current prevention.
The XC8114 is a 3A Load switch with Ideal Diode function. The perfect Ideal Diode has a Forward Voltage (VF) of zero Volts, resulting in a Diode with no voltage drop. Whilst this perfect Diode remains elusive our new IC comes very close to the achieving this goal.
This IC integrates an ideal diode function that achieves ultra-low loss equivalent to a diode forward voltage (VF) of just 20mV. This is approximately about 1/20th of the forward voltage typically found in Schottky barrier diodes used for reverse current protection, significantly extending battery life. Despite the VF being as low as 20mV, the reverse current from VOUT to VIN remains at 0μA, truly embodying the characteristics of an ideal diode. These features make it easy to implement output OR circuits and effectively reduce power consumption in backup battery applications.
The XC8114 uses constant current limiting and fold-back current limiting to manage overcurrent. The fold-back method limits short-circuit current to 60mA, allowing for safe operation even in short-circuit conditions. The thermal shutdown function prevents IC damage due to overheating. These features enable the easy implementation of a reverse current prevention circuit with ultra-low loss and comprehensive protection functions. The device is also suitable for output OR-connection circuit configurations.
Furthermore, its 3A output current capability makes it the perfect choice for high-current applications such as USB power lines and various power supply interfaces.
KEY FEATURES:
- Ideal Diode function
- Low Forward Voltage (VF = 20mV)
- Low Forward Voltage (VF = 20mV)
- No Input Current under Reverse bias
- Iq of VIN = 0.0μA during Reverse bias
- Iq of VIN = 0.0μA during Reverse bias
- Perfect for OR connection applications
- With true reverse current prevention
- With true reverse current prevention
- Applications include:
- Battery back-up circuits
- Circuits to prevent backflow when batteries are paralleled
- Adding shutdown function for shipping
- Parallel connection for higher currents
- With lower RON
- With lower RON
- Small, Low-Profile Package
- WLP-4-04 only 0.82mm x 1.48mm x 0.495mm
KEY ELECTRICAL PARAMETERS:
| SERIES | XC8114  |
|
| Input Voltage | 1.5V ~ 6.0V | |
| Output Current | 3A (VIN > 2.6 V) |
|
| Over Current Limit | 4500mA | |
| Short current | 60mA | |
| Quiescent Current | 3.6μA/ch | |
| Stand-by Current | 0.65μA/ch | |
| Reverse Bias Current | 0.8μA/ch | |
| Forward Voltage | 20mV | |
| Functions | Ideal Diode Function | |
| True Reverse prevention | ||
| Inrush current prevention | ||
| Protection Circuits | Over Current Limit | |
| Thermal Shutdown | ||
| Op. Amb. Temp. | -40℃ ~ +105℃ | |
WLP-4-04
(BOTTOM VIEW)
(0.82 x 1.48 x 0.495mm)
DFN1820-6G
(BOTTOM VIEW)
(1.8 x 2.0 x 0.6mm)
Under Development
SOT89-5
(TOP VIEW)
(4.5 x 4.6 x 1.6mm)
V-I CURVE OF IDEAL DIODE
This graph illustrates the performance of the
XC8114 3A channel Load Switch
TYPICAL APPLICATION CIRCUIT
APPLICATION EXAMPLE: OR CIRCUIT
The series uses constant current limiting and fold-back current limiting to manage overcurrent.
The fold-back method limits short-circuit current to 60mA, allowing for safe operation even in short-circuit conditions. The thermal shutdown function prevents IC damage due to overheating.
These features enable the easy implementation of a reverse current prevention circuit with ultra-low loss and comprehensive protection functions. The device is also suitable for output OR-connection circuit configurations.
An example of OR connection circuit using the XC8114 series, is perfect for OR circuits because of its low VF and 0μA VIN Iq when Reverse biased. This circuit realises switching between two or more power supplies such as an internal power supply and an external power supply without voltage drop.
The example below demonstrates a simple OR connection circuit using the XC8114 series, which is ideal for OR circuits because of its low VF and 0μA VIN Iq when Reverse biased. This circuit realises switching between two or more power supplies such as an internal power supply and an external power supply without voltage drop.
OR CIRCUIT FOR BACK-UP BATTERY WITH SHIPPING MODE
An example below of an OR connection circuit equipped with a simple shipment function (ship function).
The XC8114 can be put into standby by inputting the “H” voltage to the “Shutdown Signal” when the product is shipped. As a result, the current consumption of the battery can be suppressed to ISTB (TYP. 0.65μA), and the battery drive time can be extended.
Current consumption at no load under each operating condition.
| Battery For Back up Operating mode |
Applied voltage to VIN | Applied voltage to VOUT | Shutdown Signal |
EN2 | IIN2 | IVOUT2 | IEN2 | 2ch Pch Driver FET |
Reverse Protection |
| External power supply applied | VIN1 + VREV1≦VOUT1 | VOUT1 | “L” | “H” (VOUT) |
0μA | IRBC2 (0.8μA) |
IENH2 (0.5μA) |
OFF | Yes |
| Backup Operation | 1.5V ~ 6.0V | - | “L” | “H” (VOUT) |
IQ2 (3.6μA) |
0μA | IENH2 (0.5μA) |
ON | - |
| Backup Operation → Ship Mode |
1.5V ~ 6.0V | - | “H” Pulse | “L” Pulse (GND) |
ISTB2 (0.65μA) |
0μA | IENH2 (0μA) |
OFF | - |
| Ship Mode | 1.5V ~ 6.0V | - | “L” | “L” (VOUT=0V) |
ISTB2 (0.65μA) |
0μA | IENH2 (0μA) |
OFF | - |
APPLICATION EXAMPLE: PARALLEL CONNECTION FOR HIGH CURRENTS
The XC8114 can be connected in parallel to deliver higher currents of 3A or more as illustrated by the graph
When connected in parallel, the Ron is ½!
The circuit on the right is an example which multiple XC8114 series are connected in parallel.
Normally, the maximum output current of XC8114 is 3A, but the maximum value of the output current can be increased to 3A or more by arranging multiple units in parallel.
For more information on our Ideal Diode Family check out our Power Management Brochure - packed with innovative ideas to help you optimise your specific power needs.