34708 datasheet(51/159 Pages) FREESCALE

51 / 159 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC34708

Functional Block Description

010001

0.8625

110001

1.2625

010010

0.8750

110010

1.2750

010011

0.8875

110011

1.2875

010100

0.9000

110100

1.3000

010101

0.9125

110101

1.3125

010110

0.9250

110110

1.3250

010111

0.9375

110111

1.3375

011000

0.9500

111000

1.3500

011001

0.9625

111001

1.3625

011010

0.9750

111010

1.3750

011011

0.9875

111011

1.3875

011100

1.0000

111100

1.4000

011101

1.0125

111101

1.4125

011110

1.0250

111110

1.4250

011111

1.0375

111111

1.4375

Table 40. SW2 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

SW2 BUCK REGULATOR

VSW2IN

Operating Input Voltage

• PWM operation, 0 < IL < IMAX

• PFM operation, 0 < IL < ILMAX

3.0

2.8

4.5

VSW2ACC

Output Voltage Accuracy

• PWM mode including ripple, load regulation, and transients

• PFM Mode, including ripple, load regulation, and transients

Nom-25

Nom

Nom+25

(46)

ISW2

Continuous Output Load Current, VINMIN < BP < 4.65 V

• PWM mode

• PFM mode

1000

ISW2PEAK

Current Limiter Peak Current Detection

•VIN = 3.6 V Current through Inductor

2.0

ISW2

TRANSIENT

Transient Load Change

• 100 mA/µs

0.500

VSW2OS-

START

Start-up Overshoot, IL = 0

tON-SW2

Turn-on Time

• Enable to 90% of end value IL = 0

500

µs

Table 39. SW2 Output Voltage Programmability

Set Point

SW2[5:0]

SW2x

Output (V)

Set Point

SW2[5:0]

SW2 Output

(V)

34708 Datasheet(PDF) 51 Page - Freescale Semiconductor, Inc

34708 Datasheet(HTML) 51 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

Datasheet Download

Link URL