SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 3

• Manufacturer Part Number: SC189ASKTRT
• Description: 2.5MHz, 1.5A Synchronous Step Down Regulator In SOT-23_5
• Manufacturer: Semtech

Absolute Maximum Ratings
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-
(2) Tested according to JEDEC standard JESD22-A114-B.
(3)
Electrical Characteristics
Unless specified: V
© 2009 Semtech Corp.
VIN Supply Voltage ……………………………… -0.3 to 6.0V
LX Voltage
VOUT Voltage
EN Voltage …………………………………. -0.3 to V
Peak IR Reflow temperature …………………………. 260°C
ESD Protection Level
Parameter
Under-Voltage Lockout
Output Voltage Tolerance
Current Limit
VIN Supply Current
VIN Shutdown Current
High Side Switch Resistance
Low Side Switch Resistance
LX Leakage Current
Line Regulation
Load Regulation
Oscillator Frequency
Soft-Start Time
EN Input High Current
5 package) with copper of 1oz for each layer.
For SOT23-5 package, the limit of the maximum power dissiption shown in figure 2 may reduce the maximum output current.
(2)
………….. -1 to V
(2)
IN
……………………………… -0.3 to V
= 5.0V, C
(2)
(1)
………………………………….
IN
=10µF, C
IN
OUT
+1V, -3V (20ns Max), 6V Max
Symbol
ΔV
=10µF; L=2.2µH; -40°C<T
ΔV
R
R
UVLO
ΔV
I
I
I
DSON_N
I
DSON_P
F
LK(LX)
LOAD-REG
SHDN
EN_HI
LIMIT
LINE-REG
T
I
OSC
Q
SS
OUT
IN
IN
+0.3V
+0.3V
3kV
A
I
V
V
<+85 °C; T
I
LX
V
V
LX
I
I
IN
IN
LX
LX
= -100mA, for MLPD-UT6
IN
IN
V
= 100mA, for MLPD-UT6
= 5.0V; I
Peak inductor current
=5.5V; L
= -100mA, for SOT23-5
= -100mA, for SOT23-5
=3.6V to 5.0V; No Load
=5.5V; L
IN
EN= VIN, No Load
= 3.6 – 5.0V; I
3
Conditions
Recommended Operating Conditions
Thermal Information
Hysteresis
EN= GND
Rising V
VIN Supply Voltage ……………………………… 2.9 to 5.5V
Maximum Output Current
Temperature Range …………………………… -40 to +85˚C
Thermal Resistance, Junction to Ambient
Maximum Junction Temperature …………………… +150°C
Storage Temperature Range ………………… -65 to +150 °C
EN=VIN
X
OUT
J(MAX)
=5.0V; EN=GND
X
=0V; EN=GND
=10mA – 1.5A
MLPD-UT6 Package ……………………………… 60°C/W
SOT23-5 Package
=125°C; Unless otherwise noted typical values are T
IN
OUT
=0A
……………………………… 90°C/W
(3)
…………………………… 1.5A
Min
2.60
-2.5
-2.0
-10
2.0
2.0
0.125
Typ
2.70
0.13
0.15
0.10
±1.0
±1.0
250
100
7.5
2.5
-1
1
1
(1)
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Max
+2.5
2.80
3.0
2.0
10
10
SC189
A
=+25 °C.
Units
MHz
mV
mA
µA
µA
µA
µs
%
%
%
Ω
V
A