S1721 datasheet(30/42 Pages) SII

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

S-1721 Series

Rev.2.0_00

Seiko Instruments Inc.

VOUT = 5.0 V

VIN = 6.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 50 mA

VOUT = 5.0 V

VIN = 6.0 V, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 10 ↔ 100 mA

5.50

5.40

5.20

5.10

5.00

4.90

4.70

4.60

t [

μs]

100

−125

−100

−50

−25

−50

200

300

50 100 150

250

350

−100

−75

4.80

5.30

VOUT

IOUT

5.50

5.40

5.20

5.10

5.00

4.90

4.70

4.60

t [

μs]

200

−250

−200

−100

−50

150

−50

200

300

50 100 150

250

350

−100

100

−150

4.80

5.30

VOUT

IOUT

(3) Transient Response Characteristics of ON/OFF Pin (Ta = 25°C)

VOUT = 1.2 V

VIN = 2.2 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA

VOUT = 3.0 V

VIN = 4.0 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA

1.2

0.8

0.4

t [

μs]

4.0

2.0

100

150

200

VOUT

VON / OFF

1.6

2.0

2.4

−2.0

−4.0

−6.0

−8.0

3.0

2.0

1.0

t [

μs]

6.0

4.0

100

150

200

VOUT

VON / OFF

2.0

4.0

5.0

6.0

7.0

−2.0

−4.0

−6.0

−8.0

VOUT = 5.0 V

VIN = 6.0 V, tr = 5.0 μs, CLn = 1.0 μF, CIN = 1.0 μF, IOUT = 100 mA

3.0

2.0

1.0

t [

μs]

8.0

4.0

100

150

200

2.0

4.0

5.0

VOUT

VON / OFF

6.0

7.0

8.0

9.0

10.0

−2.0

−4.0

−6.0

−8.0

−10.0

−12.0

Remark

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

S1721 Datasheet(PDF) 30 Page - Seiko Instruments Inc

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