HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

S-1112/1122 Series

Seiko Instruments Inc.

9



Electrical Characteristics

Table 7

(Ta = 25

°C unless otherwise specified)

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Test

Circuit

Output voltage

*1

× 0.99

× 1.01

V

1

Output current

*2

150

*5

⎯

⎯

mA

3

Dropout voltage

*3

= 100 mA

1.5 V

⎯

0.32

0.55

V

1

1.7 V

⎯

0.28

0.47

V

1

1.9 V

⎯

0.25

0.35

V

1

2.4 V

⎯

0.20

0.29

V

1

2.8 V

⎯

0.19

0.26

V

1

Line regulation

OUT

IN

OUT1

V

V

V

•

Δ

Δ

⎯

0.05

0.2

%/V

1

Load regulation

+ 1.0 V,

1.0 mA

⎯

12

40

mV

1

Output voltage

temperature coefficient

*4

OUT

OUT

V

Ta

V

•

Δ

Δ

−40°C ≤ Ta ≤ 85°C

⎯

±100

⎯

ppm/

°

C

1

Current consumption

during operation

+ 1.0 V, ON/OFF pin = ON,

no load

⎯

50

90

μA2

Current consumption

during power-off

+ 1.0 V, ON/OFF pin = OFF,

no load

⎯

0.1

1.0

μA2

Input voltage

⎯

2.0

⎯

6.5

V

⎯

ON/OFF pin

input voltage “H”

1.5

⎯

⎯

V

4

ON/OFF pin

input voltage “L”

⎯

⎯

0.3

V

4

ON/OFF pin

input current “H”

−0.1

⎯

0.1

μA

4

ON/OFF pin

input current “L”

−0.1

⎯

0.1

μA

4

Ripple rejection

RR

+ 1.0 V, f = 1.0 kHz,

⎯

80

⎯

dB

5

Short-circuit current

+ 1.0 V, ON/OFF pin = ON,

⎯

200

⎯

mA

3

+ 1.0 V

*4. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.

[]

×

÷ 1000

*1. Change in temperature of output voltage

*2. Set output voltage

*3. Output voltage temperature coefficient

*5. The output current can be at least this value.

Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the

power dissipation of the package when the output current is large.

This specification is guaranteed by design.