U6229B

www.DataSheet4U.com U6229B DC/DC Converter – Power Supply 28 V Description The U6229B is a multifunctional power supply IC which provides four different voltages dedicated to supply components of complex microcontroller systems. Supplied by a battery voltage in the wide range from 6 V to 26 V, the U6229B generates typically 28.4 V with a step-up converter, PWM, external power MOSFET and 150 m H inductivity. This voltage is fed to a step-down converter with external 150 m H inductivity to generate a 7-V auxiliary voltage with a small ripple. By means of this voltage, two linear regulators with only a small power dissipation provide a constant 5-V (±3%) supply for microcontrollers and an even more accurate 5-V (±2%) supply as a reference for sensors and a/d converters. Features D Voltage outputs – 28.4-V step-up converter with I 1.2 A – 7-V step-down converter with I 400 mA – 5-V logic supply with I 14 mA – 5-V reference voltage with I 14 mA v v v v D Analog input VKL15 – Energy-reserve mode switches off the step-up converter at VBatt < 5.25 V – Controls start-up behavior D Logic output NRES – N-reset output with over/ under voltage monitoring of both 5-V supplies D Logic input ENABLE – Enables the step-up converter Ordering Information Extended Type Number U6229B Package SO20 Remarks Block Diagram VBatt 28.4 V Supply 7V Supply 5V Logic supply 5V Reference supply VBL VA1 VHL VH VCC VREF GATE Step-down converter PWM Step-up converter Logic supply Reference voltag...