U6229B

Features:

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
Logic input ENABLE
  Enables the step-up converter
Analog input VKL15
  Energy-reserve mode switches off the step-up converter at V_Batt < 5.25 V
  Controls start-up behavior
Logic output NRES
  N-reset output with over/ under voltage monitoring of both 5-V supplies


Pinout




Specifications

Parameters	Symbol	Min.	Typ.	Max.	Unit
Supply voltage	VBatt			44	V
Ambient temperature range	Tamb	40		95	°C
Junction temperature range	Tj	40		150	°C
Storage temperature range	Tstg	55		150	°C

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
H inductivity. This voltageof U6229B  is fed to a step-down converter with external 150
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.