34712 datasheet(9/23 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34712

ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

Table 4. Dynamic Electrical Characteristics

Characteristics noted under conditions 3.0 V

≤ V

IN ≤ 6.0 V, - 40°C ≤ T

A ≤ 85°C, GND = 0 V unless otherwise noted. Typical

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

Characteristic

Symbol

Min

Typ

Max

Unit

BUCK CONVERTER (PVIN, SW, GND, BOOT)

Switching Node (SW) Rise Time (19)

(PVIN = 3.3 V, IOUT = ±3.0 A)

tRISE

Switching Node (SW) Fall Time (19)

(PVIN = 3.3 V, IOUT = ±3.0 A)

tFALL

Soft Start Duration

(Normal Mode)

tSS

1.3

2.6

Over Current Limit Timer

tLIM

Over Current Limit Retry Time-out Period

tTIMEOUT

120

Output Undervoltage/Overvoltage Filter Delay Timer

tFILTER

5.0

µs

OSCILLATOR (FREQ)

Oscillator Default Switching Frequency (18)

(FREQ = GND)

FSW

1.0

MHz

Oscillator Switching Frequency Range

FSW

200

1000

kHz

CONTROL AND SUPERVISORY (STBY, SD, PG)

PG Reset Delay

tPGRESET

8.0

Thermal Shutdown Retry Time-out Period (19)

tTIMEOUT

120

Notes

18.

Oscillator Frequency tolerance is ±10%.

19.

Design information only, this parameter is not production tested.

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