SC283EVB datasheet(5/20 Pages) SEMTECH

Part #	SC283EVB

Description	Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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SC283

Typical Characteristics

Efficiency vs. Load Current

Total Loss (Per Channel) vs. Load Current

Load Regulation

Circuit Conditions: C

IN= 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (TOKO: 1127AS-2R2M).

Dropout Voltage in 100% Duty Cycle Operation

Dropout Voltage of 100% Duty Cycle Operation

0

50

100

150

200

250

300

350

400

450

500

0.0

0.3

0.6

0.9

1.2

1.5

1.8

Output Current (A)

TA= 25°C

L= 1071AS-2R2M

(DCR= 60m

_max)

L= 1127AS-2R2M

(DCR=48m

_max)

UVLO Rising Threshold Variation

-1.0%

-0.8%

-0.6%

-0.4%

-0.2%

0.0%

0.2%

0.4%

0.6%

0.8%

1.0%

-40

-15

10

35

60

85

Ambient Temperature (°C)

IOUT= 0A

UVLO Hysteresis Variation

-5%

-4%

-3%

-2%

-1%

0%

1%

2%

3%

4%

5%

-40

-15

10

35

60

85

Ambient Temperature (°C)

IOUT= 0A

UVLO Hysteresis Variation

Efficiency

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.0

0.3

0.6

0.9

1.2

1.5

1.8

Output Current (A)

VIN=5.0V;VOUT=3.3V

TA=25°C

VIN=5.0V;VOUT=1.5V

VIN=3.3V;VOUT=1.5V

Total Loss

0

200

400

600

800

1000

0.0

0.3

0.6

0.9

1.2

1.5

1.8

Output Current (A)

TA=25°C

VIN=5.0V;VOUT=3.3V

VIN=5.0V;VOUT=1.5V

VIN=3.3V;VOUT=1.5V

Load Regulation

-1.0%

-0.8%

-0.6%

-0.4%

-0.2%

0.0%

0.2%

0.4%

0.6%

0.8%

1.0%

0.0

0.3

0.6

0.9

1.2

1.5

1.8

Output Current (A)

TA=25°C

VIN=5.0V;VOUT=3.3V

VIN=5.0V;VOUT=1.5V

VIN=3.3V;VOUT=1.5V

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5

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