Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33997/D Rev 3.
0, 03/2003
Advance Information Switching Power Supply with Linear Regulators
The 33997 is a medium-power, multi-output power supply integrated circuit that is capable of operating over a wide input
voltage range, from 6.
0 V up to 26.
5 V with 40 V transient capability.
It incorporates a sensorless current mode control step-down switching controller regulating directly to 5.
0 V.
The 3.
3 V linear regulator uses an external pass transistor to reduce the 33997 power dissipation.
The 33997 also provides a 3.
3 V linear standby regulator and two 5.
0 V sensor supply outputs protected by interna...