SC4605 Ver la hoja de datos (PDF) - Semtech Corporation

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SC4605

Low Input, High Efficiency Synchronous, Step Down Controller

Semtech Corporation 

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless otherwise specified, VCC = 5V, CT = 470pF, TA = -40°C to 85°C, TA = TJ.

Parameter

Test Conditions

Min

Typ

Oscillator

Initial Accuracy

Minimum Operation Frequency (1)

TA = 25°C

255

300

100

Maximum Operation Frequency (1)

600

Ramp Peak to Valley (1)

1.5

Ramp Peak Voltage (1)

2.0

Ramp Valley Voltage (1)

0.5

Sleep, Soft Start, Current Limit

Sleep Threshold

Measured at FS

Soft Start Time (1)

1.8

ISET Bias Current

Current Limit Blank Time (1)

TJ = 25°C

-43

-50

150

Gate Drive

Duty Cycle

0

Peak Source (DRVH) (2)

Peak Sink (DRVH) (2)

Peak Source (DRVL) (2)

Peak Sink (DRVL) (2)

Output Rise Time (2)

Output Fall Time (2)

Minimum Non-Overlap (1)

Vgs = 5V, ISOURCE = 100mA

Vgs = 5V, ISINK = 100mA

Vgs = 5V, ISOURCE = 100mA

Vgs = 5V, ISINK = 100mA

Vgs = 5V, COUT = 4.7nF

35

Vgs = 5V, COUT = 4.7nF

35

30

40

Notes:

(1). Guaranteed by design.

(2). Guaranteed by characterization.

(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.

SC4605

Max

Unit

345

kHz

kHz

kHz

V

V

V

0.2

V

ms

-57

µA

ns

97

%

3

Ω

3

Ω

3

Ω

3

Ω

ns

ns

ns

 2004 Semtech Corp.

3

www.semtech.com

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