SG3525A SG3527A

4

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS (Continued)

Characteristics

Symbol

Min

Typ

Max

Unit

SOFT–START SECTION

Soft–Start Current (Vshutdown = 0 V)

25

50

80

µA

Soft–Start Voltage (Vshutdown = 2.0 V)

–

0.4

0.6

V

Shutdown Input Current (Vshutdown = 2.5 V)

–

0.4

1.0

mA

OUTPUT DRIVERS (Each Output, VCC = +20 V)

Output Low Level

(Isink = 20 mA)

(Isink = 100 mA)

VOL

–

–

0.2

1.0

0.4

2.0

V

Output High Level

(Isource = 20 mA)

(Isource = 100 mA)

VOH

18

17

19

18

–

–

V

Under Voltage Lockout (V8 and V9 = High)

VUL

6.0

7.0

8.0

V

Collector Leakage, VC = +35 V (Note 7)

IC(leak)

–

–

200

µA

Rise Time (CL = 1.0 nF, TJ = 25°C)

tr

–

100

600

ns

Fall Time (CL = 1.0 nF, TJ = 25°C)

tf

–

50

300

ns

Shutdown Delay (VDS = +3.0 V, CS = 0, TJ = +25°C)

tds

–

0.2

0.5

µs

Supply Current (VCC = +35 V)

ICC

–

14

20

mA

NOTE:

7. Applies to SG3525A only, due to polarity of output pulses.

Reference Regulator

Flip/

Flop

PWM

–

+

E/A

DUT

Vref

Clock

16

4

0.1

3

6

7

5

Deadtime

100

Ω

0.001

Comp

10k

9

0.01

1

2

1

2

3

1

2

3

3

2

1

3

+

–

1 = VIO

2 = 1(+)

3 = 1(–)

0.1

0.009

1.5k

1.0k

3.0k

PWM

ADJ.

Sync

RT

Ramp

50

µA

5.0k

5.0k

15

13

11

VC

Out A

0.1

0.1

1.0k, 1.0W

(2)

14

Out B

Gnd

12

8

Softstart

5.0

µF

10

2.0k

Shutdown

Vref

+

O

s

c

i

l

l

a

t

o

r

V/I Meter

VCC

A

1

2

B

Lab Test Fixture