MC33063AVPG datasheet(11/15 Pages) ONSEMI

部件名	MC33063AVPG

功能描述	1.5 A, Step-Up/Down/ Inverting Switching Regulators

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制造商	ONSEMI [ON Semiconductor]

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MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A

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11

Calculation

Step−Up

Step−Down

Voltage−Inverting

ton/toff

Vout ) VF * Vin(min)

Vin(min) * Vsat

Vout ) VF

Vin(min) * Vsat * Vout

|Vout| ) VF

Vin * Vsat

(ton + toff)

1

f

1

f

1

f

toff

ton ) toff

ton

toff

) 1

ton ) toff

ton

toff

) 1

ton ) toff

ton

toff

) 1

ton

(ton + toff) − toff

CT

4.0 x 10−5 ton

Ipk(switch)

2Iout(max)

ton

toff

) 1

2Iout(max)

ton

toff

) 1

Rsc

0.3/Ipk(switch)

L(min)

(Vin(min) * Vsat)

Ipk(switch)

ton(max)

(Vin(min) * Vsat * Vout)

Ipk(switch)

ton(max)

(Vin(min) * Vsat)

Ipk(switch)

ton(max)

CO

9

Ioutton

Vripple(pp)

Ipk(switch)(ton ) toff)

8Vripple(pp)

9

Ioutton

Vripple(pp)

Vsat = Saturation voltage of the output switch.

VF = Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

Vin − Nominal input voltage.

Vout − Desired output voltage,

Iout − Desired output current.

fmin − Minimum desired output switching frequency at the selected values of Vin and IO.

Vripple(pp) − Desired peak−to−peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its

equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the

line and load regulation.

NOTE: For further information refer to Application Note AN920A/D and AN954/D.

|Vout| + 1.25 1 )

R2

R1

Figure 17. Design Formula Table

类似零件编号 - MC33063AVPG

制造商	部件名	数据表	功能描述
ON Semiconductor	MC33063AVPG	159Kb / 13P	1.5 A, Step?뭊p/Down/ Inverting Switching Regulators February, 2007 ??Rev. 19
	MC33063AVPG	1Mb / 15P	1.5 A, Step?뭊p/Down/ Inverting Switching Regulators August, 2010 ??Rev. 23
	MC33063AVPG	1Mb / 15P	1.5 A, Step-Up/Down/ Inverting Switching Regulators August, 2010 ??Rev. 23
	MC33063AVPG	1Mb / 15P	1.5 A, Step-Up/Down/Inverting Switching Regulators December, 2016 ??Rev. 24
	MC33063AVPG	1Mb / 15P	1.5 A, Step-Up/Down/Inverting Switching Regulators December, 2016 ??Rev. 24

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