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SC4626 датащи(PDF) 3 Page - Semtech Corporation

номер детали SC4626
подробное описание детали  2.5MHz, 1A Synchronous Step Down Regulator in SOT23-5
PDF  21 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4626 датащи(HTML) 3 Page - Semtech Corporation

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© 2009 Semtech Corp.
3
SC4626
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:
() Measured in free convection, mounted on 0mm x 0mm, 2 layer FR4 PCB shown in figure 4 with copper of oz for each layer.
(2) Tested according to JEDEC standard JESD22-A4-B.
Electrical Characteristics
Recommended Operating Conditions
VIN Supply Voltage ……………………………… 2.9 to 5.5V
Maximum Output Current …………………………… .0A
Temperature Range …………………………… -40 to +85˚C
Thermal Resistance, Junction to Ambient() ………… 90°C/W
Maximum Junction Temperature …………………… +50°C
Storage Temperature Range ………………… -65 to +50 °C
Thermal Information
Absolute Maximum Ratings
VIN Supply Voltage ……………………………… -0.3 to 6.0V
LX Voltage …………..
- to V
IN+V, -3V (20ns Max), 6V Max
VOUT Voltage ……………………………… -0.3 to V
IN+0.3V
EN Voltage …………………………………. -0.3 to V
IN+0.3V
Peak IR Reflow temperature …………………………. 260°C
ESD Protection Level(2) …………………………………. 3kV
Unless specified: V
IN = 5.0V; -40°C<TA<+85 °C; TJ(MAX)=25°C; Unless otherwise noted typical values are TA=+25 °C.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Under-Voltage Lockout
UVLO
Rising V
IN
2.60
2.70
2.80
V
Hysteresis
250
mV
Output Voltage Tolerance()
ΔV
OUT
V
IN=3.6V to 5.0V; No Load
-2.5
+2.5
%
Current Limit
I
LIMIT
Peak inductor current
.5
A
VIN Supply Current
I
Q
EN= VIN, No Load
7.5
mA
VIN Shutdown Current
I
SHDN
EN= GND

0
µA
High Side Switch Resistance
R
DSON_P
I
LX= 00mA
0.5
Ω
Low Side Switch Resistance
R
DSON_N
I
LX= -00mA
0.25
LX Leakage Current
I
LK(LX)
V
IN=5.5V; LX=0V; EN=GND

0
µA
V
IN=5.5V; LX=5.0V; EN=GND
-0
-
Line Regulation
ΔV
LINE-REG
V
IN= 3.6 – 5.0V; IOUT=0A
±.0
%
Load Regulation(2)
ΔV
LOAD-REG
V
IN= 5.0V; IOUT=0mA – .0A
±.0
%
Oscillator Frequency
F
OSC
2.0
2.5
3.0
MHz
Soft-Start Time(2)
T
SS
00
µs
EN Input High Current
I
EN_HI
EN=VIN
-2.0
2.0
µA
EN Input Low Current
I
EN_LO
EN=GND
-2.0
2.0
µA
EN Input High Threshold
V
EN_HI
.2
V
EN Input Low Threshold
V
EN_LO
0.4
V



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