aat1154 Datasheet - Analogictech
The AAT1154 is a high efficiency, step-down DC/DC converter that delivers an output current of up to 1A.
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📝 Component Overview
The AAT1154 is a high efficiency, step-down DC/DC converter that delivers an output current of up to 1A. It operates from an input voltage range of 2.7V to 5.5V and can produce an output voltage as low as 0.6V. The device is designed for use in portable electronics, where high efficiency and small size are crucial. It features a low dropout voltage, allowing it to maintain its output voltage even when the input voltage is close to the output voltage. The AAT1154 also has built-in over-temperature protection, short-circuit protection, and over-current protection to prevent damage to the device.
Key Features and Benefits
- High efficiency step-down DC/DC converter
- Output current up to 1A
- Input voltage range: 2.7V to 5.5V
- Output voltage as low as 0.6V
- Low dropout voltage
- Built-in over-temperature protection
- Short-circuit protection
- Over-current protection
- Small size and high efficiency make it ideal for portable electronics
Typical Applications
- Portable electronics
- Mobile phones
- PDAs
- Digital cameras
- MP3 players
- Portable gaming devices
- Wireless headsets
- Bluetooth devices
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Input Voltage | 5.5V |
| Operating Temperature | -40°C to 85°C |
| Storage Temperature | -40°C to 150°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | VIN = 3.3V, IOUT = 500mA | 0.6V | 1.2V | 1.8V | V |
| Efficiency | VIN = 3.3V, VOUT = 1.2V, IOUT = 500mA | 85% | 90% | 95% | % |
Package Information
- SOP-8: 8-lead SOP package
Pin Configuration
- Pin 1: VIN - Input voltage
- Pin 2: GND - Ground
- Pin 3: FB - Feedback
- Pin 4: VOUT - Output voltage
- Pin 5: EN - Enable
- Pin 6: NC - No connection
- Pin 7: NC - No connection
- Pin 8: NC - No connection
🔧 Application Guidelines
Design Considerations
The AAT1154 is a high efficiency, step-down DC/DC converter that requires careful design consideration to ensure optimal performance. The input capacitor should be placed as close as possible to the VIN pin, and the output capacitor should be placed as close as possible to the VOUT pin. The device also requires a feedback resistor network to set the output voltage.
Installation Guidelines
The AAT1154 should be mounted on a PCB with adequate thermal management to ensure reliable operation. The device is sensitive to moisture and should be stored in a dry environment. The PCB should be designed to minimize thermal resistance and ensure good heat sinking.
Operational Notes
The AAT1154 is a high efficiency device that can operate at high temperatures. However, it is still important to ensure that the device is operated within its specified temperature range to ensure reliable operation. The device should also be protected from over-voltage and over-current conditions to prevent damage.