MC34708 datasheet(59/159 Pages) FREESCALE

59 / 159 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC34708

Functional Block Description

tON-SW4

Turn-on Time

• Enable to 90% of end value IL = 0

500

µs

fSW4

Switching Frequency

• PLLX = 0

• PLLX = 1

2.0

4.0

MHz

ISW4Q

Quiescent Current Consumption

• PWMPS or APS MODE, IL = 0 mA; High output voltage range

(VSW4x = 3.15 V or 2.5 V) device not switching

• PWMPS or APS MODE, IL = 0 mA; Low output voltage range

(VSW4x = 1.3 V). device not switching

• PFM MODE, IL = 0 mA; device not switching

500

260

µA

SW4

Efficiency

•PFM, 3.15 V, 10 mA (A)

• PWM Pulse skipping, 3.15 V, 50 mA (A)

• PWM Pulse skipping, 3.15 V, 250 mA (A)

• PWM, 3.15 V, 500 mA (A)

•PFM, 1.2 V, 10 mA (B)

• PWM Pulse skipping, 1.2 V, 50 mA (B)

• PWM Pulse skipping, 1.2 V, 250 mA (B)

•PWM 1.2 V, 500 mA (B)

(52)

Notes:

50.

Transient loading for load steps of ILMAX / 2.

51.

When SW4A/B is set to 3.0 V and above the regulator may drop out of regulation when BP nears the output voltage.

52.

Efficiency numbers at VIN = 3.6 V, excludes the quiescent current.

Table 46. SW4A/B Electrical Specifications

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) 59 Page - Freescale Semiconductor, Inc

MC34708 数据表(HTML) 59 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