Ultra-Tiny nanoPower, 1A Ideal Diodes with Ultra-Low-Voltage Drop

The MAX40203 is an ideal diode current-switch with forward voltage drop that is approximately an order of magnitude smaller than that of Schottky diodes. When forward biased and enabled, the MAX40203 conducts with 90mV of voltage drop while carrying currents as high as 1A. During a short-circuit or a fast power-up, the device limits its output current to 2A. The MAX40203 thermally protects itself and any downstream circuitry from overcurrent conditions.

This ideal diode operates from a supply voltage of 1.2V to 5.5V. The supply current is relatively constant with load current, and is typically 300nA. When disabled (EN = low), the ideal diode blocks voltages up to 6V in either direction, makes it suitable for use in most low-voltage, portable electronic devices.

The MAX40203 is available in a tiny, 0.77mm x 0.77mm, 4-bump WLP with a 0.35mm bump pitch and a 5-pin SOT23 package. It is specified over the -40°C to +125°C automotive temperature range.

Applications

* Battery Backup Systems

* Cellular Phones

* Electronic Toys

* Notebook and Tablet Computers

* Portable Medical Devices

* Powerline Fault Recorders

* USB-Powered Peripherals

* Lower Voltage Drop in Portable Applications

* 14mV Forward Drop at 1mA (WLP)

* 16mV Forward Drop at 100mA (WLP)

* 43mV Forward Drop at 500mA (WLP)

* 90mV Forward Drop at 1A (WLP)

* Longer Battery Life

* Low Leakage When Reverse-Biased from VDD:

* 10nA (typ)

* Low Supply Quiescent Current

* 300nA (typ), 500nA (max)

* Smaller Footprint Than Larger Schottky Diodes

* Tiny 0.77mm x 0.77mm 4-Bump WLP

* 5-Pin SOT23 Package

* Wide Supply Voltage Range: 1.2V to 5.5V

* Thermally Self-Protecting

* -40°C to +125° C Operating Temperature Range