063EC datasheet(6/23 Pages) STMICROELECTRONICS

6 / 23 page

Electrical characteristics

MC34063AB - MC34063AC - MC34063EB - MC34063EC

6/23

Electrical characteristics

(Refer to the test circuits, VCC = 5 V, TA = TLOW to THIGH, unless otherwise specified, see

Note 2)

Table 5.

Oscillator

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

fOSC

Frequency

VPIN5 = 0V, CT = 1 nF, TA = 25°C

kHz

ICHG

Charge current

VCC = 5 to 40V, TA = 25°C

µA

IDISCHG

Discharge current

VCC = 5 to 40V, TA = 25°C

140

200

260

µA

IDISCHG/ICHG

Discharge to charge

current ratio

PIN 7 = VCC, TA = 25°C

5.2

6.2

7.5

µA

VIPK(sense)

Current limit sense voltage ICHG = IDISCHG, TA = 25°C

250

300

350

Table 6.

Output switch

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VCE(sat)

Saturation voltage, darlington

connection

ISW = 1 A, PIN 7, 8 connected

1.3

VCE(sat)

Saturation voltage

ISW = 1 A, RPIN8 = 82 Ω to VCC

Forced

β ~ 20

0.45

0.7

hFE

DC current gain

ISW = 1 A,VCE = 5 V, TA = 25°C

120

IC(off)

Collector off-state current

VCE = 40 V

0.01

100

µA

Table 7.

Comparator

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VTH

Threshold voltage

TA = 25°C

1.225

1.25

1.275

TA = TLOW to THIGH

1.21

1.29

Regline

Threshold voltage line

regulation

VCC = 3 to 40 V

IIB

Input bias current

VIN = 0 V

-5

-400

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