SP6120 datasheet(6/22 Pages) EXAR

Part #	SP6120

Description	Low Voltage, AnyFETTM, Synchronous,Buck Controller

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Manufacturer	EXAR [Exar Corporation]

Direct Link	http://www.exar.com

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6 / 22 page

6

Date: 1/21/05

SP6120 Low Voltage, AnyFETTM, Synchronous, Buck Controller

50

60

70

80

90

100

02

46

Output Current (A)

810

Figure 2. Efficiency vs. Output Current

Figure 3. Load Regulation

Figure 4. Load Step Response: 0.4A to 2A

Figure 5. Load Step Response: 0.4A to 7A

TYPICAL PERFORMANCE CHARACTERISTICS

Refer to circuit in Figure 1 with V

IN = 3.3V; VOUT = 1.9V, ROSC = 18.7kΩ, and TAMB = +25°C unless otherwise noted.

Figure 6. Start-Up Response: 5A Load

1.875

1.880

1.885

1.890

1.895

1.900

1.905

1.910

1.915

1.920

1.925

01

23

45

Load Current (A)

VOUT

Gate High

IOUT(1A/div)

VOUT

Gate High

IOUT(5A/div)

VOUT

VIN

Soft Start

IIN (1A/div)

Figure 7. Overcurrent: 9A Load

VOUT

VIN

Soft Start

IOUT (5A/div)

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SP6120 Datasheet(PDF) 6 Page - Exar Corporation

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