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34710

Adjustable Dual Output Switching Power Supply

Motorola => Freescale 

Freescale Semiconductor, Inc.

DYNAMIC ELECTRICAL CHARACTERISTICS

Characteristics noted under conditions 4.75 V ≤ VIO ≤ 5.25 V, 12 V ≤ VB+ ≤ 32 V, and 0°C ≤ TJ ≤ 105°C unless otherwise noted.

Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted

Characteristic

Symbol

Min

Typ

Max

Unit

VI/O SWITCHING REGULATOR

Duty Cycle

D

45

–

55

%

Switching Rise and Fall Time

Load Resistance = 100 Ω, VB+ = 30 V

tr, tf

ns

25

–

–

Switching Rise and Fall Time

Load Resistance = 100 Ω, VB+ = 30 V

tr + tf

–

ns

–

50

SUPERVISOR CIRCUITRY

RST Delay

Cdelay = 0.1 µF

t delay

ms

48

–

82

RST Filter Time

VB+ = 9.0 V

t filter

µs

1.0

–

6.0

RST Fall Time

CL = 100 pF, RPULLUP = 4.7 kΩ, 90% to 10%

tf

ns

–

–

125

External Low (Note 12)

VI/O = 5.0 V

t slpl

(Note 13)

30

–

ns

–

RST Recovery Time Before Next RST Input (Note 12)

VI/O = 5.0 V

t phsl

µs

–

–

10

INTERNAL OSCILLATOR

Charge Pump and VI/O Switching Regulator Operating Frequency

VB+ = 9.0 V to 32 V

f OP

kHz

140

–

260

Notes

12. See Figure 2, RST Timing, page 9.

13. tslpl is an input.

34710

8

For More Information OMnOTTOhRiOsLAPAroNdALuOcGt,INTEGRATED CIRCUIT DEVICE DATA

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