69

External Variable Output Voltage Circuit

1. Variable output voltage with a single external resistor

The output voltage of the STR9000 series may be decreased by insert-

ing a resistor between terminals No.1 (output terminal) and No.2 (out-

put fine adjustment terminals). Alternatively, the output voltage may be

increased by inserting a resistor between terminals No.2 and No.5

(ground terminal).

<Standard External Circuit>

2. Fine adjustment of output voltage

The output voltage may be finely adjusted by using terminals No.1, No.2

and No. 5 as shown in the following connections.

<Standard External Circuit>

Note: The fine adjustment range of output voltage for the STR9000 se-

ries is

±0.5V max for STR9012 and +1.0V/-2.0V max for STR9015.

Adjustment exceeding these values may cause start-up errors.

w Typical Characteristics of Fine Output Voltage Adjustment

q Typical Characteristics of Variable Output Voltage

1

4

35

2

STR9000

GND

GND

for Vo down

for Vo up

++

Select either one of the external resistor.

1

4

35

2

STR9000

GND

VR

GND

++

20K

50K 100K

500K

1M

5M

50M

10M

5.3

5.2

5.1

5.0

4.9

4.8

4.7

STR9005

Ω)

°C)

Variable Output

Voltage Range

20K

50K 100K

500K

1M

5M

50M

10M

14

13

12

11

10

9

Ω)

°C)

STR9012

Variable Output

Voltage Range

20K

50K 100K

500K

1M

5M

50M

10M

17

16

15

14

13

12

Ω)

: Insertion of resistor between terminals No. 2 and No. 5

: Insertion of resistor between terminals No. 2 and No. 1

°C)

STR9015

Variable Output Voltage Range

STR9005

0

100

200

300

400

500

5.4

5.2

5.0

4.8

4.6

Ω)

Ω

Ω

°C)

0

100

200

300

400

500

14

13

12

11

10

Ω)

°C)

Ω

Ω

STR9012

0

100

200

300

400

500

20

18

16

14

12

10

Ω)

°C)

Ω

Ω

STR9015

qSTR9000 Series