SC189BULTRT datasheet(6/23 Pages) SEMTECH

Part #	SC189BULTRT

Description	2.5MHz, 1.5A Synchronous Step Down Regulator

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Manufacturer	SEMTECH [Semtech Corporation]

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6

SC189

Typical Characteristics (continued)

Circuit Conditions: C

IN= 10uF/6.3V; COUT= 10uF/6.3V for L=2.2uH; COUT= 22uF/6.3V for L=1uH.

Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.

Efficiency vs. Load Current (V

OUT=1.5V, SOT23-5)

Total Loss vs. Load Current (V

OUT=1.5V, SOT23-5)

Efficiency vs. Load Current (V

OUT=3.3V, SOT23-5)

Efficiency vs. Load Current (SOT23-5)

Efficiency

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VOUT= 1.50V

TA=25°C

VIN= 5.0V

VIN= 3.3V

Efficiency

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VOUT= 3.30V

TA=25°C

VIN= 5.0V

VIN= 4.0V

Efficiency

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VIN= 5.0V

VOUT= 1.0V

TA=25°C

L=1071AS-1R0 (33m

_typ)

L=1071AS-2R2 (50m

_typ)

L=LQM2HPN1R0MG0 (55m

_typ)

L=MDT2520-CR1R0 (60m

_typ)

Efficiency

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VIN= 5.0V

VOUT= 3.3V

TA=25°C

L=1071AS-1R0N (33m

_typ)

L=1071AS-2R2N (50m

_typ)

L=LQM2HP1R0MG0 (55m

_typ)

L=MDT2520-CR1R0M (60m

_typ)

Losses

0

200

400

600

800

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VOUT= 3.30V

TA=25°C

VIN= 5.0V

VIN= 4.0V

Losses

0

200

400

600

800

0.0

0.3

0.6

0.9

1.2

1.5

Output Current (A)

VOUT= 1.50V

TA=25°C

VIN= 5.0V

VIN= 3.3V

Total Loss vs. Load Current (V

OUT=3.3V, SOT23-5)

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