SC286 datasheet(3/20 Pages) SEMTECH

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SC286

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:

(1) Due to parasitic board inductance, the transient LX pin voltage at the point of measurement may appear larger than that which exists on silicon. The device is

designed to tolerate the short duration transient voltages that will appear on the LX pin due to the deadtime diode conduction, for inductor currents up to the

current limit setting of the device.

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

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

Unless specified: PVIN = AVIN = 5.0V, VOUT = 1.50V, C

IN = 22µF, COUT = 2 x 22µF; L = 1.0µH; -40°C≤ TJ ≤ +125 °C; Per Channel Unless otherwise noted; Typical values are

A = +25 °C.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Under-Voltage Lockout

UVLO

Rising AVINA/B; PVINA/B=AVINA/B

2.70

2.80

2.90

Hysteresis

300

Output Voltage Tolerance(1)

ΔV

OUT

PVINA/B= AVINA/B= 2.9 to 5.5V; I

OUT=0A

-1.25

+1.25

Current Limit

LIMIT

Peak LX current

5.0

6.0

7.0

Supply Current

OUTA/B = 0A

100

µA

Shutdown Current

SHDN

CTL3-0A/B = AGNDA/B

µA

High Side Switch Resistance(2)

DSON_P

LXA./B= 100mA, TJ= 25 °C

mΩ

Low Side Switch Resistance(2)

DSON_N

LXA/B= -100mA, TJ= 25 °C

X Leakage Current

(2)

LK(LX)

PVINA/B = AVINA/B= 5.5V; LXA/B= 0V; CTL3-0A/B =

AGNDA/B

µA

PVINA/B = AVINA/B = 5.5V; LXA/B = 5.0V; CTL3-0A/B =

AGNDA/B

-20

-1

Absolute Maximum Ratings

PVINA/B and AVINA/B Supply Voltages (V) . . . -0.3 to +6.0

LXA, LXB (V) (1) . . . . . . . . . . . . . . . -0.3 to PVIN +0.3V, 6V Max

VOUTA, VOUTB (V) . . . . . . . . . . . . . . . . . . . -0.3 to AVIN + 0.3

CTLx

A, CTLxB pins (V) . . . . . . . . . . . . . . . .

-0.3 to AVIN + 0.3

VOUTA, VOUTB Short Circuit Duration . . . . . . Continuous

ESD Protection Level(2) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Recommended Operating Conditions

PVINA/B and AVINA/B Supply (V) . . . . . . . . . . 2.9 to +5.5

Maximum Output Current, Each Channel (A). . . . . . . . .4.0

Input Capacitor, Each Channel (µF) . . . . . . . . . . . . . . . . . . 22

Output Capacitor, Each Channel (µF) . . . . . . 47 or 2 x 22

Output Inductor, Each Channel (µH) . . . . . . . . . . . . . . . 1.0

Thermal Information

Thermal Resistance, Junction to Ambient(3) (°C/W) . . 32.5

Thermal Resistance, Junction to Case (°C/W) . . . . . . . . . . 7

Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150

Storage Temperature Range (°C) . . . . . . . . . . . -65 to +150

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . +260

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