MC34065–H, L MC33065–H, L

3

MOTOROLA ANALOG IC DEVICE DATA

TA is the operating ambient temperature range that applies to [Note 3].)

Characteristics

Symbol

Min

Typ

Max

Unit

CURRENT SENSE SECTION

Current Sense Input Voltage Gain (Notes 4 and 5)

AV

2.75

3.0

3.25

V/V

Maximum Current Sense Input Threshold (Note 4)

Vth

0.9

1.0

1.1

V

Input Bias Current

IIB

–

– 2.0

–10

µA

Propagation Delay (Current Sense Input to Output)

tPLN(In/Out)

–

150

300

ns

DRIVE OUTPUT 2 ENABLE PIN

Enable Pin Voltage – High State (Output 2 Enabled)

VIH

VIL

3.5

0

–

–

Vref

1.5

V

Low State Input Current (VIL = 0 V)

IIB

100

250

400

µA

DRIVE OUTPUTS

Output Voltage – Low State (Isink = 20 mA)

VOL

VOH

–

1.6

12.8

10

0.3

2.4

13.3

11.2

0.5

3.0

–

12.3

V

Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA)

VOL(UVLO)

–

0.1

1.1

V

Output Voltage Rise Time (CL = 1.0 nF)

tr

–

50

150

ns

Output Voltage Fall Time (CL = 1.0 nF)

tf

–

50

150

ns

UNDERVOLTAGE LOCKOUT SECTION

Startup Threshold (VCC Increasing)

–L Suffix

–H Suffix

Vth

7.8

13

8.4

14

9.0

15

V

Minimum Operating Voltage After Turn–On (VCC Decreasing)

–L Suffix

–H Suffix

VCC(min)

7.2

9.0

7.8

10

8.4

11

V

TOTAL DEVICE

Power Supply Current

Startup

–L Suffix (VCC = 6.0 V)

–H Suffix (VCC = 12 V)

Operating (Note 2)

ICC

–

–

–

0.4

0.6

20

0.8

1.0

25

mA

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

Tlow = 0°C for the MC34065

Thigh = +70°C for MC34065

Tlow = –40°C for the MC33065

Thigh = +85°C for MC33065

4. This parameter is measured at the latch trip point with VFB = 0 V

5. Comparator gain is defined as AV =

∆V Compensation

∆V Current Sense

Figure 1. Timing Resistor versus

Oscillator Frequency

Figure 2. Maximum Output Duty Cycle

versus Oscillator Frequency

4.0

6.0

8.0

10

14

16

fOSC, OSCILLATOR FREQUENCY (Hz)

12

3.3 nF

500 pF

220 pF

330 pF

2.2 nF

5.0 nF

1.0 nF

10 k

30 k

50 k

300 k 500 k

100 k

1.0 M

100 pF

fOSC, OSCILLATOR FREQUENCY (Hz)

38

40

42

44

48

50

46

Output 2

Output 1

10 k

30 k

50 k

300 k 500 k

100 k

1.0 M

VCC =15 V

RT = 4.0 k to 16 k

TA = 25°

CL =15 pF

CT =

10 nF

VCC =15V

TA =25°C