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SC284 датащи(PDF) 3 Page - Semtech Corporation

номер детали SC284
подробное описание детали  Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
PDF  20 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC284 датащи(HTML) 3 Page - Semtech Corporation

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SC284
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:
() 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 JESD5 standards.
(2) Tested according to JEDEC standard JESD22-A4-B.
Unless specified: VINA= VINB= 5.0V, VOUTA= VOUTB=.50V, C
INA=CINB=0µF, COA=COB= 22µF, L= 2.2µH, -40°C≤ TJ≤ +25 °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
V
Hysteresis
240
300
mV
Output Voltage Tolerance()
ΔV
OUT
Channel A & B; VIN= 2.9 – 5.5V; I
OUT=0A
-2.0
+2.0
%
Current Limit
I
LIMIT
Channel A & B; Peak LX current
2.25
3.0
3.75
A
Supply Current
I
Q
Channel A & B; No load, Per channel
0
mA
Shutdown Current
I
SHDN
CTL
0-3= GND, Per channel

0
µA
High Side Switch Resistance(2)
R
DSON_P
Channel A & B; I
LX= 00mA, TJ= 25 °C
95
mΩ
Low Side Switch Resistance(2)
R
DSON_N
Channel A & B; I
LX= -00mA, TJ= 25 °C
65
L
X Leakage Current
(2)
I
LK(LX)
Channel A & B; VIN= 5.5V; LX= 0V; CTL
0-3= GND

0
µA
Channel A & B; VIN= 5.5V; LX= 5.0V; CTL
0-3= GND
-0
-
Load Regulation
ΔV
LOAD-REG
Channel A & B; VIN= 5.0V; I
OUT=mA – .8A
±0.5
%
Oscillator Frequency
f
OSC
Channel A & B
2.0
2.5
3.0
MHz
Soft-Start Time
t
SS
Channel A & B; I
OUT= .8A
850
µs
Absolute Maximum Ratings
VINA and VINB Supply (V) . . . . . . . . . . . . . . . . . . -0.3 to +6.0
LXA, LXB (V) . . . . . . . . . . . . . - to VIN+, -3 (20ns Max), 6 Max
VOUTA, VOUTB
(V). . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VIN+0.3
CTLxA/B pins
(V) . . . . . . . . . . . . . . . . . . . . -0.3 to (V
OUT + 0.3)
Peak IR Reflow Temperature (°C)
. . . . . . . . . . . . . . . . . . . . . . . . 260
ESD Protection Level(2) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . 3KV
Recommended Operating Conditions
VINA and VINB Supply (V) . . . . . . . . . . . . . . . . . . . . 2.9 to 5.5
Maximum Output current each channel (A) . . . . . . . . . . .8
Temperature Range (°C)
. . . . . . . . . . . . . . . . . . . . . . . . . -40 to +85
Thermal Information
Thermal Resistance, Junction to Ambient () (°C/W)
. . . . . . . . 40
Maximum Junction Temperature (°C)
. . . . . . . . . . . . . . . . . +50
Storage Temperature Range
(°C). . . . . . . . . . . . . . . . . -65 to +50



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