DESCRIPTION

The UTC UD100201 is a 100V/3.8A peak switching current limit,

non-sync buck converter.

The UD100201 integrated with high-side power MOSFET with

advanced COT control method, the size of the total solution will be

small, load transient will be excellent, and also with good robustness.

Integrated BST charge circuit minimize the cost and solution size.

High duty on-time extension make the part ideal for the application

that need low drop-out feature. 190μA quiescent current saves the

power, and 3μA low off current is good for those battery powered

applications.

With 4.5V to 100V wide input voltage range, the UD100201

accommodates a variety of step-down applications.

FEATURES

* 4.5V to 100V Wide Input Range

* 3.8A Typical Peak Current Limit

* Integrated 500mΩ low resistance high side power MOS

* Constant On Time Control with Constant Switching Frequency

* 190μA Low Quiescent Current

* 150kHz, 240kHz, 460kHz Switching Frequency Selectable

* Special Valley Current Limit for non-sync Buck Short Protection

* 3μA Low Current at Off-state

* Built-in Pull-up Current at EN Pin

* Full Protection: Over Current Protection, Output Over Voltage

Protection, FB Open/Short Protection, Over Temperature