Overview
The ADP197, produced by Analog Devices Inc., is a high-side load switch designed to operate within a voltage range of 1.8 V to 5.5 V. This component is engineered to provide power domain isolation, which is crucial for extending the battery life of portable and battery-operated equipment. The ADP197 features a low on-resistance, N-channel MOSFET that supports continuous currents of up to 3 A, thereby minimizing power loss. Its low quiescent current and ultralow shutdown current make it an ideal choice for battery-operated devices.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage Range | 1.8 V to 5.5 V |
| Continuous Current | Up to 3 A (TJ < 70°C), 2.22 A (TJ = 85°C) |
| On-Resistance | 12 mΩ |
| Quiescent Current | 31 μA (VIN = 4.2 V) |
| Shutdown Current | <1 μA |
| Overtemperature Protection | Activates at TJ > 125°C, reenables at TJ < 110°C |
| Package Options | 1.0 mm × 1.5 mm, 0.5 mm pitch, 6-ball WLCSP; 2.0 mm × 2.0 mm × 0.55 mm, 0.65 mm pitch, 6-lead LFCSP |
Key Features
- Low on-resistance, N-channel MOSFET for minimal power loss
- Internal charge pump for controlled turn-on times and low on-resistance
- Overtemperature protection to prevent damage to the device and downstream circuits
- Ultralow shutdown current and low quiescent current for battery efficiency
- Internal quick output discharge (QOD) circuit in the ADP197-02 model to discharge output capacitance when disabled
- Compatibility with 1.8 V logic signals through the built-in level shifter for enable logic
- Space-saving package options to minimize PCB space
Applications
- Mobile phones
- Digital cameras and audio devices
- Portable and battery-powered equipment
Q & A
- What is the operating voltage range of the ADP197? The ADP197 operates between 1.8 V and 5.5 V.
- What is the maximum continuous current supported by the ADP197? The ADP197 supports up to 3 A of continuous current at junction temperatures below 70°C.
- What is the on-resistance of the ADP197? The on-resistance is 12 mΩ across the entire input voltage range.
- What is the quiescent current of the ADP197? The quiescent current is 31 μA at VIN = 4.2 V.
- Does the ADP197 have overtemperature protection? Yes, the ADP197 has overtemperature protection that activates if the junction temperature exceeds 125°C.
- What package options are available for the ADP197? The ADP197 is available in a 1.0 mm × 1.5 mm, 0.5 mm pitch, 6-ball WLCSP and a 2.0 mm × 2.0 mm × 0.55 mm, 0.65 mm pitch, 6-lead LFCSP.
- Is the ADP197 compatible with low-voltage logic signals? Yes, the ADP197 is compatible with 1.8 V logic signals through its built-in level shifter for enable logic.
- What is the purpose of the internal charge pump in the ADP197? The internal charge pump biases the NMOS switch to achieve a relatively constant, ultralow on-resistance and allows for controlled turn-on times.
- Does the ADP197 have a quick output discharge (QOD) circuit? Yes, the ADP197-02 model includes an internal QOD circuit to discharge the output capacitance when the output is disabled.
- What types of devices typically use the ADP197? The ADP197 is typically used in mobile phones, digital cameras, audio devices, and other portable and battery-powered equipment.
