MC34025 MC33025

3

MOTOROLA ANALOG IC DEVICE DATA

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

Characteristic

Symbol

Min

Typ

Max

Unit

ERROR AMPLIFIER SECTION

Input Offset Voltage

VIO

–

–

15

mV

Input Bias Current

IIB

–

0.6

3.0

µA

Input Offset Current

IIO

–

0.1

1.0

µA

Open–Loop Voltage Gain (VO = 1.0 V to 4.0 V)

AVOL

60

95

–

dB

Gain Bandwidth Product (TJ = + 25°C)

GBW

4.0

8.3

–

MHz

Common Mode Rejection Ratio (VCM = 1.5 V to 5.5 V)

CMRR

75

95

–

dB

Power Supply Rejection Ratio (VCC = 10 V to 30 V)

PSRR

85

110

–

dB

Output Current, Source (VO = 4.0 V)

ISource

ISink

0.5

1.0

3.0

3.6

–

–

mA

Output Voltage Swing, High State (IO = – 0.5 mA)

VOH

VOL

4.5

0

4.75

0.4

5.0

1.0

V

Slew Rate

SR

6.0

12

–

V/

µs

PWM COMPARATOR SECTION

Ramp Input Bias Current

IIB

–

– 0.5

– 5.0

µA

Duty Cycle, Maximum

DC(max)

DC(min)

80

–

90

–

–

0

%

Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V)

Vth

1.1

1.25

1.4

V

Propagation Delay (Ramp Input to Output, TJ = + 25°C)

tPLH(in/out)

–

60

100

ns

SIFT–START SECTION

Charge Current (VSoft–Start = 0.5 V)

Ichg

3.0

9.0

20

µA

Discharge Current (VSoft–Start = 1.5 V)

Idischg

1.0

4.0

–

mA

CURRENT SENSE SECTION

Input Bias Current (Pin 9(12) = 0 V to 4.0 V)

IIB

–

–

15

µA

Current Limit Comparator Threshold

Sh td

C

t

Th

h ld

Vth

V

0.9

125

1.0

140

1.10

155

V

p

Shutdown Comparator Threshold

th

Vth

1.25

1.40

1.55

Propagation Delay (Current Limit/Shutdown to Output, TJ = + 25°C)

tPLH(in/out)

–

50

80

ns

OUTPUT SECTION

Output Voltage

Low State

(ISink = 20 mA)

(ISink = 200 mA)

High State

(ISource = 20 mA)

(ISource = 200 mA)

VOL

VOH

–

–

13

12

0.25

1.2

13.5

13

0.4

2.2

–

–

V

Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 0.5 mA)

VOL(UVLO)

–

0.25

1.0

V

Output Leakage Current (VC = 20 V)

IL

–

100

500

µA

Output Voltage Rise Time (CL = 1.0 nF, TJ = + 25°C)

tr

–

30

60

ns

Output Voltage Fall Time (CL = 1.0 nF, TJ = + 25°C)

tf

–

30

60

ns

UNDERVOLTAGE LOCKOUT SECTION

Start–Up Threshold (VCC Increasing)

Vth(on)

8.8

9.2

9.6

V

UVLO Hysteresis Voltage (VCC Decreasing After Turn–On)

VH

0.4

0.8

1.2

V

TOTAL DEVICE

Power Supply Current

Start–Up (VCC = 8.0 V)

Operating

ICC

–

–

0.5

25

1.2

35

mA

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.