34708 datasheet(76/159 Pages) FREESCALE

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Analog Integrated Circuit Device Data



Freescale Semiconductor

MC34708

Functional Block Description

tMODE-VGEN1 Mode Transition Time

• From low power to active and from active to low power

VIN = VINMIN, VINMAX IL = ILMAXLP

100

µs

VGEN

1MODERES

Mode Transition Response

• From low power to active and from active to low power

VIN = VINMIN, VINMAX IL = ILMAXLP

1.0

2.0

Table 66. VGEN2 Electrical Specification

Characteristics noted under conditions BP = 3.6 V, VBUS = 5.0 V, -40 C  TA  85 C, unless otherwise noted. Typical values

at BP = 3.6 V and TA = 25 °C under nominal conditions, unless otherwise noted.

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

VGEN2

VGEN2IN

Operating Input Voltage Range VINMIN to VINMAX

• All settings, BP biased

VNOM

+0.25

4.5

IGEN2

Operating Current Load Range ILMI to ILMAX

• Internal Pass FET

0.0

IGEN2

Operating Current Load Range ILMIN to ILMAX

• External PNP, Not exceeding PNP max power

0.0

250

VGEN2IN

Extended Input Voltage Range

• BP Biased, Performance may out of specification for output levels

VGEN2 [2:0] = 010 to 111

UVDET

4.5

mV/mA

COVGEN2

Minimum Bypass Capacitor Value

• Used as a condition for all other parameters

1.1

2.2

µF

ESRVGEN2 Bypass Capacitor ESR

•10 kHz – 1.0 MHz

100



VGEN2 ACTIVE MODE - DC

VGEN2

Output Voltage VOUT

•VINMIN < VIN < VINMAX ILMIN < IL < ILMAX

VNOM - 3%

VNOM

VNOM + 3%

VGEN2LOPP Load Regulation

•1.0 mA < IL < ILMAX, For any VINMIN < VIN < VINMAX

0.20

mV/mA

VGEN2LIPP Line Regulation

•VINMIN < VIN < VINMAX For any ILMIN < IL < ILMAX

8.0

VGEN2SCTH Short-circuit Protection Threshold

Internal pass FET mode

•VINMIN < VIN < VINMAX Short-circuit VOUT to GND

ILmax

+20%

IGEN2Q

Active Mode Quiescent Current

•VINMIN < VIN < VINMAX IL = 0

µA

Table 65. VGEN1 Electrical Specification

Characteristics noted under conditions BP = 3.6 V, VBUS = 5.0 V, -40 C  TA  85 C, unless otherwise noted. Typical values

at BP = 3.6 V and TA = 25 °C under nominal conditions, unless otherwise noted.

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

34708 Datasheet(PDF) 76 Page - Freescale Semiconductor, Inc

34708 Datasheet(HTML) 76 Page - Freescale Semiconductor, Inc

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