The AAT3236IJS-3.1-T1 is a high-efficiency fractional charge pump DC/DC converter designed for powering white LEDs in handheld devices. Manufactured by Advanced Analog Technology, Inc., this device utilizes a 1x/1.5x charge pump architecture to optimize efficiency across a broad input voltage range. It integrates soft-start circuitry to minimize inrush current and reduce electromagnetic interference (EMI). The AAT3236IJS-3.1-T1 also features built-in short-circuit and over-temperature protection for improved reliability and robustness.

Applications

• White LED Backlighting for LCD Displays in Mobile Phones
• LED Drivers for PDAs
• LED Backlights for Portable Media Players
• Digital Camera LED Flash
• General LED Illumination

Features

• High Efficiency: Up to 90% Efficiency
• Input Voltage Range: 2.7V to 5.5V
• Output Voltage: Regulated Output for LED Driving
• Fractional 1x/1.5x Charge Pump Architecture
• Low Noise Operation: Internal Soft-Start Function
• Short-Circuit Protection
• Over-Temperature Protection
• Small Package: 8-Pin TDFN (3x3mm)

Benefits

• Extended Battery Life: High efficiency minimizes power consumption, resulting in longer operating times for battery-powered devices.
• Reduced EMI: Soft-start circuitry and optimized design minimize electromagnetic interference, ensuring stable operation in sensitive electronic environments.
• Enhanced Reliability: Built-in protection features prevent damage from short circuits and over-temperature conditions.
• Compact Solution: The small TDFN package allows for space-saving designs in portable devices.
• Stable LED Illumination: Provides a stable and regulated current source for driving white LEDs, ensuring consistent brightness and color.

Additional Details

The AAT3236IJS-3.1-T1 is designed for a fixed output voltage suitable for driving multiple white LEDs in series or parallel. The device operates at a fixed switching frequency, typically around 1 MHz, allowing for the use of small external components. The thermal performance of the TDFN package ensures reliable operation even at higher ambient temperatures. It is also RoHS compliant.