SC185JEVB datasheet(9/18 Pages) SEMTECH

Part #	SC185JEVB

Description	4A Synchronous Step-Down Regulator

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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9 / 18 page

SC185

Typical Waveforms (continued)

Output Voltage Ripple (V

OUT=3.3V), PSAVE Mode

Output Voltage Ripple (V

OUT=3.3V) @ Full Load

Output Voltage Ripple (V

OUT=3.3V), forced PWM

Start Up (Enable) (V

OUT=1.5V), PSAVE Mode

Start Up (Enable) (V

OUT=1.5V), forced PWM

Start Up (Enable) (V

OUT=1.5V) @Full Load

Ch3

V

OUT

Output Voltage Ripple (V

IN=5.0V, VOUT=3.3V, 0A)-Auto

V

IN = 5.0V

I

OUT = 0A

Mode= Low

Ch1

V

LX

Ch2

I

LX

Ch4

V

IN

Ch3

V

OUT

Output Voltage Ripple (V

IN=5.0V, VOUT=3.3V, 0A)-PWM

V

IN = 5.0V

I

OUT = 0A

Mode= Hi

Ch1

V

LX

Ch2

I

LX

Ch4

V

IN

Ch3

V

OUT

Output Voltage Ripple (V

IN=5.0V, VOUT=3.3V, 4A)-All

V

IN = 5.0V

I

OUT = 4A

Ch1

V

LX

Ch2

I

LX

Ch4

V

IN

Start-up (V

IN=5.0V, VOUT=1.5V, 0A)-Auto

V

IN = 5.0V

I

OUT = 0A

Mode= Low

Ch1:V

EN

Ch2: I

OUT

Ch3: V

OUT

Ch4: PGood

Start-up (V

IN=5.0V, VOUT=1.5V, 0A)-PWM

V

IN = 5.0V

I

OUT = 0A

Mode= Hi

Ch1:V

EN

Ch2: I

OUT

Ch3: V

OUT

Ch4: PGood

Start-up (V

IN=5.0V, VOUT=1.5V, 4A)-All

V

IN = 5.0V

I

OUT = 4A

Ch1:V

EN

Ch2: I

OUT

Ch3: V

OUT

Ch4: PGood

Circuit Conditions: C

IN= 22uF/6.3V, COUT= 2 x 22uF/6.3V, CSS= 10nF. Unless otherwise noted, L= 1.0uH (TOKO: FDV0530S-1R0).

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