SPEC No.

LCY-1210401A

MODEL No.

LS027B7DH01

PAGE

25

10． External Power Supply Circuit

An external power supply circuit is necessary to drive the memory LCD with 3V battery.

Table 10-1 shows recommended power supply IC>

Table 10-1

Vendor

Model No.

Note

SII

S-8821

Charge pump type

National Semiconductor

LM2750

Charge pump type

【

Remark 10-1】For detailed specification, refer to specification for each power supply IC.

【

Remark 10-2】To use, set constant value after sufficient evaluation of actual application.

Electrical Characteristics

Table 10-2

Vin [V]

Vout

Model No.

min

max

min

typ

max

Iout

[A]

S-8821

2.8

5.0

4.9

5.0

5.1

0.04

LM2750

2.7

5.6

4.8

5.0

5.2

0.04

【

Remark 10-3】For detailed specification, refer to specification for each power supply IC.

【

Remark 10-4】To use, set constant value after sufficient evaluation of actual application.

Reference Circuit

Reference circuit is shown below.

S-8821

LM2750