DESCRIPTION
The LT® 3645 is a dual output regulator combining a 500mA buck regulator and a 200mA low dropout linear regulator (LDO). The wide input voltage range of 3.6V to 36V makes the LT3645 suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and capacitors, resulting in a very small solution.

FEATURES
Wide Input Range:
  Operation from 3.6V to 36V
  Overvoltage Lockout Protects Circuit Through 55V Transients on Input
500mA Output Current Switching Regulator
High Switching Frequency: 750kHz
200mA Low Dropout Linear Regulator
  1.2V to 16V Input; 0.8V to 8V Output
  310mV Dropout Voltage VCC2to OUT2
Precision Programmable Undervoltage Lockout
Short-Circuit Robust
Internal Soft-Start
<2μA Shutdown Current
Small Thermally Enhanced 16-Lead (3mm × 3mm)
  QFN and 12-Lead MSE Packages

APPLICATIONS
Automotive CMOS Image Sensors
Industrial/Automotive Micro-Controller Supply