Sink Output Current

200

300

µA

Supply Voltage Ripple

Rejection

µF 1-5mA load

current

60

80

dB

DC Open Loop Gain

∞

50

60

dB

Transconductance

2.5

mS

OSCILLATOR SECTION

Ramp valley

0.78

0.85

0.92

V

Ramp peak

1.9

2.1

2.3

V

9

9.6

10.2

V

Maximum Duty Cycle

95

97

%

Maximum Frequency

13K

500

KHz

SYNC FUNCTION

High Input Voltage

3.5

V

Low Input Voltage

0.9

V

Slave Sink Current

0.15

0.25

0.45

mA

Master Output Amplitude

4

4.5

V

Output Pulse Width

0.20

0.35

µs

(*) Pulse testing with a low duty cycle.

(**) The maximum power dissipation of the package must be observed.

ELECTRICAL CHARACTERISTICS (continued)

L4973

C1

C2

R2

C7

C3

C4

C5

C6

R1

D1

L1

3 x

C0

C12

R3

R4

C8

4,5,6

13,14,15

7,8

9

1

17

16

11

2,3

12

D97IN515B

(DIP18)

10

C1=1000

µF/63V

C2=220nF/63V

C3=470nF

C4=1

µF/50V

C5=220pF

C6=22nF

C7=2.7nF

C8=220nF/63V

C0=100

µF/40V(C9,C10,C11)

C12=Optional (220nF)

L1=150

µHK

OOL

µ 77310 - 40 Turns - 0.9mm

R1=9.1K

R2=20K

D1=GI SB560

R3(K

Ω)

R4(K

Ω)

3.3

5.1

12

15

18

24

0

2.7

12

16

20

30

4.7

4.7

4.7

4.7

4.7

L4973 V3.3

R3(K

Ω)

R4(K

Ω)

5.1

12

15

18

24

0

6.2

9.1

12

18

4.7

4.7

4.7

4.7

L4973 V5.1

Figure 1. Evaluation Board Circuit

L4973V3 - L4973V5 - L4973D3 - L4973D5

5/16