34063AD datasheet(2/2 Pages) ETC

2 / 2 page

ORDERING INFORMATION

Device

Temperature

Range

Package

34063AD 0° to +70°C

SO-8

34063AP1

Plastic DIP

ELECTRICAL CHARACTERICISTICS

(VCC = 5.0 V, TA= 0 to +70

oC unless otherwise specified.)

Characteristics

Symbol

Min

Typ

Max

Unit

OSCILLATOR

Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)

fosc

kHz

Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)

Ichg

µA

Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C)

Idischg

140

200

260

µA

Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25°C)

Idischg/Ichg

5.2

6.2

7.5

—

Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)

Vlpk(sense) 250

300

350

OUTPUT SWITCH (Note 3)

Saturation Voltage, Darlington Connection (ISW = 1.0 A,

Pins 1, 8 connected)

VCE(sat)

—

1.0

1.3

Saturation Voltage (ISW = 1.0 A, RPin 8 = 82

Ω to VCC.

Forced

β = 20)

VCE(sat)

—

0.45

0.7

DC Current Gain (ISW = 1.0 A, VCE

= 5.0 V, T

A = 25°C)

hFE

120

—

Collector Off-State Current (VCE = 40V)

IC(off)

—

0.01

100

µA

COMPARATOR

Threshold Voltage (TA = 25°C)

(TA = TLOW to THIGH)

Vth

1.225

1.21

1.25

—

1.275

1.29

Threshold Voltage (TA = 25°C) **

Vth

1.2375

1.25

1.2625 V

Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V)

V REG line

1.4

5.0

Input Bias Current (Vin=0V)

IIB

—

-40

-400

TOTAL DEVICE

Supply Current (VCC = 5 0 V to 40 V, CT = 1 0 nF, Vpin7 =

VCC. VPin5 > Vth, Pin 2 = Gnd, Remaining pins open)

ICC

2.5

4.0

NOTES:

1. Maximum package power dissipation limits must be observed.

Low duty cycle pulse techniques are used during test to maintain Junction temperature as close to ambient

temperature as possible

If the output switch is driven into hard saturation (non Darlington configuration) at low switch currents (< 300 mA) and

high driver

currents (>30 mA), it may take up to 2.0

µs to come out of saturation This condition will shorten the off' time

at frequencies > 30 kHz,

and is magnified at high temperatures This condition does not occur with a Darlington configuration,

since the output switch cannot

saturate If a non Darlington configuration is used, the following output drive condition is

recommended

Forced

β of output switch = IC, output/(Ic, driver -7.0 mA*) > 10

*The 100

Ω. resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts

**Possible version for shipment

Pin connection

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