SC493 datasheet(8/28 Pages) SEMTECH

Part #	SC493

Description	EcoSpeedTM Step-down Controller with I2C Interface

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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8 / 28 page

SC493

Typical Characteristics (continued)

Soft Start — EN Pin

EN (5V/div)

IN = 5V, VOUT = 1.8V, Soft Start = 1ms, Power-on Delay = 0ms

Time (500μs/div)

OUT (500mV/div)

PGOOD (5V/div)

Soft Start — I2C

SCL (5V/div)

IN = 5V, VOUT = 1.8V, Soft Start = 2ms, Power-on Delay = 2ms

Time (1ms/div)

OUT (500mV/div)

PGOOD (5V/div)

Load Transient Response

OUT

(5A/div)

IN = 5V, VOUT = 1.2V, fSW = 1MHz, L = 0.2μH, C = 220μF

Time (500μs/div)

OUT (20mV/div)

Output Over Current Response — Normal Operation

L (10A/div)

IN = 5V, VOUT = 1.8V, fSW = 1MHz, L = 0.2μH, C = 1000μF

Time (20μs/div)

PGOOD (5V/div)

LX (5V/div)

OUT (1V/div)

Switching — Ultrasonic PSAVE Mode

OUT (20mV/div)

IN = 5V, VOUT = 1.8V, fSW = 500kHz, No load

Time (4μs/div)

DH (5V/div)

DL (5V/div)

Switching — Forced Continuous Mode

LX (5V/div)

IN = 5V, VOUT = 1.8V, fSW = 1MHz, Load = 3A

Time (1μs/div)

OUT (20mV/div)

FB (20mV/div)

OUT = 20A

SC493 Datasheet(PDF) 8 Page - Semtech Corporation