S-1155 datasheet(21/28 Pages) SII

21 / 28 page

HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

Rev.1.1_00

S-1155 Series

Seiko Instruments Inc.

Reference Data

(1) Characteristics of Input Transient Response (Ta = 25°C)

S-1155B10

IOUT = 100 mA, tr = tf = 5.0

µs, COUT = 4.7 µF, CIN = 4.7 µF

S-1155B30

IOUT = 100 mA, tr = tf = 5.0

µs, COUT = 4.7 µF, CIN = 4.7 µF

200

t [

µs]

−200

600

400

800 1000 1200

0.95

1.00

1.05

1.10

1.15

VIN

VOUT

200

t [

µs]

−200

600

400

800 1000 1200

3.00

3.05

3.10

3.15

3.20

2.90

2.95

VIN

VOUT

S-1155B50

IOUT = 100 mA, tr = tf = 5.0

µs, COUT = 4.7 µF, CIN = 4.7 µF

4.90

4.95

5.00

5.05

5.10

5.15

5.20

5.25

200

t [

µs]

−200

600

400

800 1000 1200

VIN

VOUT

(2) Characteristics of Load Transient Response (Ta = 25

°C)

S-1155B10

VIN = 2.0 V, COUT = 4.7

µF, CIN = 4.7 µF, IOUT = 50 ↔ 100 mA

S-1155B30

VIN = 4.0 V, COUT = 4.7

µF, CIN = 4.7 µF, IOUT = 50 ↔ 100 mA

150

100

−50

−100

0.90

0.95

1.00

1.05

1.10

1.15

1.20

200

t [

µs]

−200

600

400

800 1000 1200

−150

IOUT

VOUT

150

100

−50

−100

2.90

2.95

3.00

3.05

3.10

3.15

3.20

200

t [

µs]

−200

600

400

800 1000 1200

−150

IOUT

VOUT

S-1155B50

VIN = 5.5 V, COUT = 4.7

µF, CIN = 4.7 µF, IOUT = 50 ↔ 100 mA

−50

−100

4.90

4.95

5.00

5.05

5.10

5.15

5.20

200

t [

µs]

−200

600

400

800 1000 1200

−150

IOUT

VOUT

100

150

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