SC283 datasheet(3/20 Pages) SEMTECH

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SC283

Electrical Characteristics

Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the

parameters specified in the Electrical Characteristics section is not recommended.

Notes:

(5) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

(6) Tested according to JEDEC standard JESD22-A114-B.

Recommended Operating Conditions

Supply Voltage VINA and VINB …………………… 2.9 to 5.5V

Maximum Output Current for each channel ………… 1.8A

Temperature Range …………………………… -40 to +85˚C

Thermal Resistance, Junction to Ambient(5) ………… 65 °C/W

Maximum Junction Temperature …………………… +150°C

Storage Temperature Range ………………… -65 to +150 °C

Thermal Information

VINA and VINB Supply Voltages ………………… -0.3 to 6.0V

LXA, LXB Voltage …. . -1 to VIN+1V, -3V (20ns Max), 6V Max

VOUTA, VOUTB Voltage ……………………

-0.3 to VIN+0.3V

CTLxA/B pins Voltages

…………………

-0.3 to VIN+0.3V

Peak IR Reflow Temperature …………………………. 260°C

ESD Protection Level(6) ……………………………… 3.5kV

Unless specified: VINA= VINB= 5.0V, VOUTA= VOUTB=1.50V, C

INA=CINB=10µF, COA=COB= 22µF, L= 2.2µH, -40°C≤ TJ≤ +125 °C. Unless otherwise noted

typical values are T

A= +25 °C.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Under-Voltage Lockout

UVLO

Rising VINA, VINB

2.65

2.75

2.85

Hysteresis

240

300

Output Voltage Tolerance(7)

ΔV

OUT

Channel A & B; VIN= 2.9 – 5.5V; I

OUT=0A

-2.0

+2.0

Current Limit

LIMIT

Channel A & B; Peak LX current

2.25

3.0

3.75

Supply Current

Channel A & B; No load, Per channel

Shutdown Current

SHDN

CTL

0-3= GND, Per channel

µA

High Side Switch Resistance(8)

DSON_P

Channel A & B; I

LX= 100mA, TJ= 25 °C

mΩ

Low Side Switch Resistance(8)

DSON_N

Channel A & B; I

LX= -100mA, TJ= 25 °C

X Leakage Current

(8)

LK(LX)

Channel A & B; VIN= 5.5V; LX= 0V; CTL

0-3= GND

µA

Channel A & B; VIN= 5.5V; LX= 5.0V; CTL

0-3= GND

-10

-1

Load Regulation

ΔV

LOAD-REG

Channel A & B; VIN= 5.0V; I

OUT=1mA – 1.8A

±0.5

Oscillator Frequency

OSC

Channel A & B

2.125

2.500

2.875

MHz

Soft-Start Time

Channel A & B; I

OUT= 1.8A

850

µs

Foldback Holding Current

CL_HOLD

Average LX Current, VOUT=1.5V

240

Average LX Current, VOUT=3.3V

130

CTLx Input Current(8)

CTL_

Channel A & B; CTL

0-3=VIN or GND

-2.0

2.0

µA

CTLx Input High Threshold

CTLx_HI

Channel A & B

1.2

Absolute Maximum Ratings

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