S1721 datasheet(29/42 Pages) SII

29 / 42 page

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.2.0_00

S-1721 Series

Seiko Instruments Inc.

Reference Data (Per Circuit)

(1) Transient Response Characteristics when Input (Ta = 25°C) Common to VR1 and VR2

VOUT = 1.2 V

IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF

VOUT = 3.0 V

IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF

1.30

1.28

1.26

1.24

1.22

1.20

1.18

1.16

1.14

t [

μs]

4.0

3.0

2.5

2.0

0.5

1.0

1.5

3.5

−50

200

300

50 100 150

250

350

−100

VOUT

VIN

3.10

3.08

3.06

3.04

3.02

3.00

2.98

2.96

t [

μs]

7.0

5.0

4.0

1.0

2.0

3.0

6.0

−50

200

300

50 100 150

250

350

−100

VOUT

VIN

VOUT = 5.0 V

IOUT = 30 mA, tr = tf = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF

5.04

5.03

5.02

5.01

5.00

4.99

4.98

4.97

t [

μs]

7.0

6.0

5.5

3.5

4.0

4.5

5.0

6.5

−50

200

300

50 100 150

250

350

−100

VOUT

VIN

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

VOUT = 1.2 V

VIN = 2.2 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA

VOUT = 1.2 V

VIN = 2.2 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA

1.46

1.42

1.34

1.30

1.26

1.22

1.14

1.10

t [

μs]

100

−150

−125

−50

−25

−50

200

300

50 100 150

250

350

−100

1.18

1.38

VOUT

IOUT

1.42

1.38

1.30

1.26

1.22

1.18

1.10

1.06

t [

μs]

200

−250

−200

−100

−50

150

−50

200

300

50 100 150

250

350

−100

VOUT

IOUT

100

−150

1.14

1.34

VOUT = 3.0 V

VIN = 4.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA

VOUT = 3.0 V

VIN = 4.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA

3.25

3.20

3.10

3.05

3.00

2.95

2.85

2.80

t [

μs]

100

−125

−100

−50

−25

−50

200

300

50 100 150

250

350

−100

−75

2.90

3.15

VOUT

IOUT

3.25

3.20

3.10

3.05

3.00

2.95

2.85

2.80

t [

μs]

200

−250

−200

−100

−50

150

−50

200

300

50 100 150

250

350

−100

100

−150

2.90

3.15

VOUT

IOUT

Remark

CLn: Capacitor set to VOUTn pin externally (n = 1, 2)

S1721 Datasheet(PDF) 29 Page - Seiko Instruments Inc

S1721 Datasheet(HTML) 29 Page - Seiko Instruments Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Datasheet Download

Link URL