MC34025 MC33025

2

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Power Supply Voltage

VCC

30

V

Output Driver Supply Voltage

VC

20

V

Output Current, Source or Sink (Note 1)

DC

Pulsed (0.5

µs)

IO

0.5

2.0

A

Current Sense, Soft–Start, Ramp, and Error Amp Inputs

Vin

– 0.3 to +7.0

V

Error Amp Output and Soft–Start Sink Current

IO

10

mA

Clock and RT Output Current

ICO

5.0

mA

Power Dissipation and Thermal Characteristics

SO–16 Package (Case 751G)

Maximum Power Dissipation @ TA = + 25°C

Thermal Resistance, Junction–to–Air

DIP Package (Case 648)

Maximum Power Dissipation @ TA = + 25°C

Thermal Resistance, Junction–to–Air

PD

R

θJA

PD

R

θJA

862

145

1.25

100

mW

°C/W

W

°C/W

Operating Junction Temperature

TJ

+150

°C

Operating Ambient Temperature (Note 2)

MC34025

MC33025

TA

0 to +70

– 40 to +105

°C

Storage Temperature Range

Tstg

– 55 to +150

°C

the operating ambient temperature range that applies [Note 2], unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

REFERENCE SECTION

Reference Output Voltage (IO = 1.0 mA, TJ = + 25°C)

Vref

5.05

5.1

5.15

V

Line Regulation (VCC = 10 V to 30 V)

Regline

–

2.0

15

mV

Load Regulation (IO = 1.0 mA to 10 mA)

Regload

–

2.0

15

mV

Temperature Stability

TS

–

0.2

–

mV/

°C

Total Output Variation over Line, Load, and Temperature

Vref

4.95

–

5.25

V

Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = + 25°C)

Vn

–

50

–

µV

Long Term Stability (TA = +125°C for 1000 Hours)

S

–

5.0

–

mV

Output Short Circuit Current

ISC

–30

–65

–100

mA

OSCILLATOR SECTION

Frequency

TJ = + 25°C

Line (VCC = 10 V to 30 V) and Temperature (TA = Tlow to Thigh)

fosc

380

370

400

400

420

430

kHz

Frequency Change with Voltage (VCC = 10 V to 30 V)

∆fosc/∆V

–

0.2

1.0

%

Frequency Change with Temperature (TA = Tlow to Thigh)

∆fosc/∆T

–

2.0

–

%

Sawtooth Peak Voltage

VP

2.6

2.8

3.0

V

Sawtooth Valley Voltage

VV

0.7

1.0

1.25

V

Clock Output Voltage

High State

Low State

VOH

VOL

3.9

–

4.5

2.3

–

2.9

V

NOTES: 1. Maximum package power dissipation limits must be observed.

2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.