MC34708 datasheet(71/159 Pages) FREESCALE

71 / 159 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC34708

Functional Block Description

VUSB2LOPP Load Regulation

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

0.25

mV/mA

VUSB2LIPP Line Regulation

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

8.0

VUSB2SCTH Short-circuit Protection Threshold

Internal pass FET mode

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

ILMAX

+20%

IUSB2Q

Active Mode Quiescent Current, VINMIN < VIN < VINMAX

•IL = 0, Internal PMOS configuration

•VINMIN < VIN < VINMAX IL = 0, External PNP configuration

µA

VUSB2 LOW POWER MODE - DC

VUSB2

Output Voltage VOUT

•VINMIN < VIN < VINMAX ILMINLP < IL < ILMAXLP

VNOM - 3%

VNOM

VNOM + 3%

IUSB2

Current Load Range ILMINLP to ILMAXLP

0.0

3.0

IUSB2Q

Low Power Mode Quiescent Current

•VINMIN < VIN < VINMAX IL = 0

8.0

10.5

µA

VUSB2 ACTIVE MODE - AC

VUSB2PSRR PSRR, IL = 75% of ILMAX 20 Hz to 20 kHz

•VIN = VINMIN + 100 mV

•VIN = VNOM + 1.0 V

VUSB

2NOISE

Output Noise Density, VIN = VINMIN IL = 75% of ILMAX

• 100 Hz – 1.0 kHz

•> 1.0 kHz – 1.0 MHz

1.0

dB/dec

V/Hz

tON-VUSB2 Turn-on Time

• Enable to 90% of end value VIN = VINMIN, VINMAX IL = 0

1.0

tOFF-VUSB2 Turn-off Time

• Disable to 10% of initial value VIN = VINMIN, VINMAX IL = 0

0.05

VUSB2OS-

START

Start-up Overshoot

•VIN = VINMIN, VINMAX IL = 0

1.0

2.0

VUSB2LO

TRANSIENT

Transient Load Response, VIN = VINMIN, VINMAXx

• VUSB2=01, 10, 11

• VUSB2=00

1.0

2.0

VUSB2LI

TRANSIENT

Transient Line Response

•IL = 75% of ILMAX

5.0

8.0

tMOD-VUSB2 Mode Transition Time

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

VIN = VINMIN, VINMAX IL = ILMAXLP

100

µs

VUSBMODE

RES

Mode Transition Response

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

VIN = VINMIN, VINMAX IL = ILMAXLP

1.0

2.0

Table 60. VUSB2 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

MC34708 数据表(PDF) 71 Page - Freescale Semiconductor, Inc

MC34708 数据表(HTML) 71 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载