AnalogicTech Expands Integrated Load Switch Portfolio with Introduction of Ultra-High Precision Current Limit ICs

Offering precision-current-limit capability as tight as ± five percent, the AAT4616 family allows system designers to reduce the margin they would otherwise typically have to implement in their systems. This allows products such as HDTVs, set top boxes and tablet computers to maximize the power usage from their USB or other supply rails and buses.





“In previous generations of our Load Switch Family, we integrated many discrete functions into space saving, single-chip solutions,” said Roger Smullen, Director of Strategic Marketing for AnalogicTech. “With the introduction of the AAT4616 family, we deliver the same high performance, fully integrated solution with the added benefit of ultra-high precision current limiting. Whether our customers are producing HDTVs, tablets, set top boxes or 3G/4G USB datacards, they must constantly improve the performance, cost, size and efficiency of their products, and the AAT4616 products help them achieve those goals.”





The AAT4616 family broadens the AnalogicTech Integrated Load Switch family by adding the ultra-high precision (± five percent) AAT4616 and the high precision (± 10 percent) AAT4616A to the existing family of current limit devices. System designers can also pick from a broad set of options to select the best device for their end product, including: active hi/lo enable, fault flag/no fault flag, resistor settable current limit, precision, and multiple package choices, among others. The comprehensive options and benefits available from the AAT4616 family deliver maximum flexibility to meet a full range of product design requirements.





Further, the AAT4616 family incorporates a host of protection features including reverse blocking, over temperature shutdown, short circuit protection and fast transient response to ensure safe system operation. Finally, the SOT23-5 versions of the AAT4616 family are pin compatible with the previous generation AAT4610 and AAT4614 parts, which facilitates upgrading an existing end product to a higher performance current limit IC with a drop-in replacement.





The AAT4616 family is priced from US$0.54 to US$0.61 @10K units, depending on part and features. For other quantities, contact AnalogicTech or its distributors. The AAT4616 and AAT4616A are currently shipping.



Key Features:



* Key Features:

* Input Voltage Range: 2.4V to 5.5V

* Programmable Over-current Limit Setting

o 300mA to 1.6A

* ±5 percent High Current Limit Accuracy at 750mA (AAT4616)

* ±10 percent High Current Limit Accuracy at 750mA (AAT4616A)

* Fast Transient Response:

o 2μs Response to Short Circuit

* Low Quiescent Current

o 10μA Typical while Enabled

o 1μA Max with Switch Off

* 130mΩ Typical RDS(ON)

* Under-Voltage Lockout (UVLO)

* Reverse Blocking During Disable

* 4ms Fault Masking at Start-up (Capacitive Load)

* Fault Flag Open Drain Output (TDFN22-6 and TDFN22-8 Packages Only)

* Active Hi/Lo Enable Options

* Over Temperature Protection

* SOT23-5 and TDFN22-8 Package (AAT4616)

* TDFN22-6 Package (AAT4616A)

* Temperature Range: -40°C to +85°C