Product Description: The NID1101 is a compact, high-efficiency ideal diode that replaces traditional Schottky diodes in low-voltage power systems. It provides a low froward voltage drop alternative to traditional Schottky diodes while integrating both forward and true reverse current blocking.
The NID1101 operates across a 1.5 V to 5.5 V input range, and supports up to 1.5 A of continuous current. It is well suited for applications that require minimal power loss and precise current control, such as power OR-ing, redundant supply switchover, and reverse current protection. In dual-supply configurations, it enables seamless transition between sources without the need for additional control logic.
An active-high enable (EN) pin governs device operation.
When EN is low, the NID1101 remains off, blocking current flow in both directions.
When EN is asserted and the input voltage (IN) exceeds the output voltage (OUT), the device activates with controlled turn-on, managing inrush current during startup.
Once enabled, the device starts up in a controlled manner limiting the amount of inrush current. Once startup is completed, the device regulates the voltage between the IN and OUT pins that is approximately an order of magnitude lower than similarly rated Schottky diodes.
To ensure robust system performance, the NID1101 integrates short-circuit current limiting and thermal shutdown protection. If the output voltage rises above the input, the device automatically enters a high-impedance state with minimal reverse leakage current, effectively preventing reverse conduction.
A variety of power OR-ing configurations are supported for system flexibility:
The NID1101 is available in a compact WLCSP4 (SOT8113) package and is characterized for operation over an ambient temperature range of –40 °C to 125 °C.
Features and benefits
- Input voltage range: 1.5 V to 5.5 V
- Low forward drop voltage: VFWD = 29 mV (typ. at 3.6 V input and 100 mA load current)
- Reverse voltage blocking always
- Low leakage current when VOUT > VIN
Applications
- Smart wearables
- OR-ing applications
- Diode replacement
- Battery backup systems
- USB powered devices
Figure 1. Simplified application
