aat1149 Datasheet - Analogdevices
The AAT1149 is a high efficiency, low dropout linear regulator designed for handheld devices.
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📝 Component Overview
The AAT1149 is a high efficiency, low dropout linear regulator designed for handheld devices. It can deliver up to 400mA of output current and has a low dropout voltage of 300mV at full load. The device is available in a tiny SC70JW-8 package, making it ideal for space-constrained applications.
Key Features and Benefits
- High Efficiency: Up to 95% at full load
- Low Dropout Voltage: 300mV at 400mA
- Low Quiescent Current: 25uA in shutdown mode
- High Accuracy: +/-2% over temperature
- Tiny SC70JW-8 Package: Ideal for handheld devices
- Over-Temperature Protection
- Current Limit Protection
Typical Applications
- Handheld Devices
- Smartphones
- Tablets
- Laptops
- Wireless Modules
- Bluetooth Devices
- GPS Devices
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Input Voltage | 5.5V |
| Operating Temperature | -40 to 85°C |
| Storage Temperature | -40 to 150°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | Vin = 3.5V, Iout = 400mA | 2.5V | 3.0V | 3.5V | V |
| Dropout Voltage | Vin = 3.5V, Iout = 400mA | 200mV | 300mV | 400mV | mV |
Package Information
- SC70JW-8: Tiny 8-pin package with a thermal pad
Pin Configuration
- Pin 1: VIN - Input voltage pin
- Pin 2: GND - Ground pin
🔧 Application Guidelines
Design Considerations
The AAT1149 is designed for high efficiency and low dropout voltage. To achieve the best performance, it is recommended to use a 10uF ceramic capacitor at the input and a 10uF ceramic capacitor at the output.
Installation Guidelines
The device should be mounted on a PCB with a thermal pad to improve heat dissipation. The input and output capacitors should be placed as close as possible to the device.
Operational Notes
The device has a built-in over-temperature protection circuit that will shut down the device if the junction temperature exceeds 150°C. The device will automatically restart when the temperature drops below 120°C.