mc33283ftb28r2 ON Semiconductor, mc33283ftb28r2 Datasheet - Page 17

• Manufacturer Part Number: mc33283ftb28r2
• Description: Versatile 6 Regulator Power Management Circuit For Cellular Subscriber Terminal
• Manufacturer: ON Semiconductor

Introduction
integration. More than a simple multi−output low dropout regulator
(LDO), it offers a comprehensive solution to power any portable
device such as GSM phones etc.
output current capabilities. These regulators are marked R1, R2, R3
and R7 on the simplified block diagram. This configuration ensures an
excellent noise isolation between the LDOs and thus between the
downstream electronics.
delivers 5V up to 20mA while the battery is at a lower value. Finally,
for maximum flexibility, regulator R5 is a multi−output device in one
part: with the help of an external pin, the designer can toggle its value
between 4.75V or 2.85V. This regulator is split in two distinct
references: R5A and R5B.
The MC33283 represents a major lead toward large−scale analog
The system includes four 2.85V regulators featuring different
Thanks to the implementation of the charge pump, regulator R6
Figure 15. Current step response: Regulator 1
Figure 13. Start−up response: Regulator 1
Product Description and Application Hints
TYPICAL OSCILLOSCOPE SHOTS
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Figure 14. Start−up response: Regulator 6
Figure 16. Enable response: Regulator 6