MAX16820ATT+

LED Driver IC Overview

The MAX16820ATT+ is a step-down constant-current high-brightness LED driver from the MAX16819/MAX16820 series. It operates within a 4.5V to 28V input voltage range and features an integrated 5V/10mA on-board regulator. The device utilizes a hysteretic control algorithm for excellent input-supply rejection and fast transient response. It supports up to 2MHz switching frequency, enabling small external component sizes. Key specifications include ±5% LED current accuracy, over 25W output power capability, and a dedicated PWM dimming input (DIM). The part is housed in a 6-WDFN Exposed Pad package.

LED Driver IC Feature Summary

• High-side current sensing with integrated current-setting circuitry minimizes external components while maintaining precise regulation.
• Dedicated PWM dimming control input enables wide-range pulsed dimming efficiency up to 20kHz.
• Hysteretic control architecture eliminates the need for external compensation networks.
• Integrated 5V/10mA on-board regulator provides auxiliary power capabilities.

LED Driver IC Applications

• Automotive interior and exterior lighting systems
• Architectural and ambient illumination applications
• LED bulbs such as MR16 and other general LED illumination uses

LED Driver IC Procurement Notes

Verify the specific suffix 'ATT' against official Analog Devices documentation to confirm the exact ripple characteristics and pinout configuration. Ensure the procurement channel sources genuine parts from authorized distributors to avoid counterfeit components. Cross-reference the RoHS compliance status and lead times directly with the manufacturer or authorized agents, as availability may vary by region.

LED Driver IC Selection Notes

Select the MAX16820ATT+ when a 10% inductor current ripple is required, distinguishing it from the MAX16819 which offers 30% ripple. This component is suitable for designs needing a wide input voltage range up to 28V and high switching frequencies to reduce passive component size. Consider the ±5% current accuracy and hysteretic control benefits for applications demanding fast load transient response without complex compensation.

LED Driver IC Part Context

The MAX16820ATT+ belongs to the MAX16819/MAX16820 family of step-down constant-current LED drivers. These devices are designed for cost-effective solutions in various lighting sectors. The MAX16820 variant specifically differentiates itself through its 10% inductor current ripple characteristic compared to the 30% ripple of the MAX16819, both operating at frequencies up to 2MHz.

LED Driver IC Replacement Considerations

The MAX16819ATT+ is a confirmed substitute within the same family, differing primarily in inductor current ripple specifications (30% vs 10%). Verify compatibility regarding thermal performance and PCB layout requirements when substituting between these variants.