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SC189AEVB-3 Datasheet(PDF) 3 Page - Semtech Corporation

Part # SC189AEVB-3
Description  2.5MHz, 1.5A Synchronous Step Down Regulator
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC189AEVB-3 Datasheet(HTML) 3 Page - Semtech Corporation

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© 2009 Semtech Corp.
3
SC189
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) Measured in free convection, mounted on 10mm x 10mm, 2 layer FR4 PCB shown in figure 7 ( for MLPD-UT6 package) and figure 8 ( for SOT23-
5 package) with copper of 1oz for each layer.
(2) Tested according to JEDEC standard JESD22-A114-B.
(3) For SOT23-5 package, the limit of the maximum power dissiption shown in figure 2 may reduce the maximum output current.
Electrical Characteristics
Recommended Operating Conditions
VIN Supply Voltage ……………………………… 2.9 to 5.5V
Maximum Output Current(3) …………………………… 1.5A
Temperature Range …………………………… -40 to +85˚C
Thermal Resistance, Junction to Ambient(1)
MLPD-UT6 Package ……………………………… 60°C/W
SOT23-5 Package ……………………………… 90°C/W
Maximum Junction Temperature …………………… +150°C
Storage Temperature Range ………………… -65 to +150 °C
Thermal Information
Absolute Maximum Ratings
VIN Supply Voltage ……………………………… -0.3 to 6.0V
LX Voltage
………….. -1 to V
IN+1V, -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, CIN=10µF, COUT=10µF; L=2.2µH; -40°C<TA<+85 °C; TJ(MAX)=125°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(1)
ΔV
OUT
V
IN=3.6V to 5.0V; No Load
-2.5
+2.5
%
Current Limit
I
LIMIT
Peak inductor current
2.0
A
VIN Supply Current
I
Q
EN= VIN, No Load
7.5
mA
VIN Shutdown Current
I
SHDN
EN= GND
1
10
µA
High Side Switch Resistance
R
DSON_P
I
LX= 100mA, for MLPD-UT6
0.13
Ω
I
LX= -100mA, for SOT23-5
0.15
Low Side Switch Resistance
R
DSON_N
I
LX= -100mA, for MLPD-UT6
0.10
I
LX= -100mA, for SOT23-5
0.125
LX Leakage Current
I
LK(LX)
V
IN=5.5V; LX=0V; EN=GND
1
10
µA
V
IN=5.5V; LX=5.0V; EN=GND
-10
-1
Line Regulation
ΔV
LINE-REG
V
IN= 3.6 – 5.0V; IOUT=0A
±1.0
%
Load Regulation(2)
ΔV
LOAD-REG
V
IN= 5.0V; IOUT=10mA – 1.5A
±1.0
%
Oscillator Frequency
F
OSC
2.0
2.5
3.0
MHz
Soft-Start Time(2)
T
SS
100
µs
EN Input High Current
I
EN_HI
EN=VIN
-2.0
2.0
µA


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