33997 datasheet(11/20 Pages) FREESCALE

Part #	33997

Description	Switching Power Supply with Linear Regulators

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

33997

11

Timing Diagrams

Figure 2. Soft-Start Time

Figure 3. VREF Retry Timer

Figure 4. PWROK Delay Timer (Power-On Reset)

4.8V

tSS

0

5.0

0

6.0

5.0

TIME

2.5V

0

5.0

0

14

5.0

0

3.3

??V

TIME

2.0V

tRet

tDet

2.0V

4.0V

0

5.0

0

14

5.0

tD(PWROK)

0

3.3

4.6V

TIME

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33997 Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc

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