SC4509
POWER MANAGEMENT
Absolute Maximum Rating
PRELIMINARY
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the
Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device reliability.
Parameter
Input Supply Voltage
SW Voltage
Maximum Output Voltage
Feedback Voltage
EN/SS Voltage
Maximum Junction Temperature
Storage Temperature Range
Thermal Impedance
Junction to Ambient
(1)
MLPD-W8
SOT23-6
Symbol
V
IN
V
SW
V
OUT
V
FB
V
EN/SS
T
J
T
STG
θ
JA
T
LEAD
T
PKG
V
ESD
Maximum
-0.3 to 20
-0.3 to 30
30
-0.3 to 20
-0.3 to V
IN
+ 0.3
125
-65 to +150
78
165
300
260
2
Units
V
V
V
V
V
°C
°C
C/W
°C
°C
kV
Lead Temperature (Soldering), 10s (SOT23-6 package only)
Peak IR Flow Temperature, (10-40sec)
ESD Rating (Human Body Model)
(2)
Note:
1) Calculated from package in still air, mounted to 3”x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
2) Tested in accordance to JEDEC standard JESD22-A114B.
Electrical Characteristics
Unless specified: V
IN
= V
EN/SS
= 3.6V; C
IN
= 1μF; C
OUT
= 0.22μF; L = 22μH; unless otherwise noted, T
A
= +25°C for Typ, -40ºC to 85°C for Min and Max.
Parameter
Input Voltage
Quiescent Current
Feedback Voltage
Feedback Pin Bias Current
Switching Frequency
Maximum Output Voltage
Switch Saturation Voltage
Maximum Duty Cycle
Switch Current Limit
Switch Leakage Current
Shutdown Current
PWM Dimming Frequency
(1)
EN/SS Threshold Low
EN/SS Threshold High
Symbol
V
IN
I
Q
V
FB
I
QFB
f
OSC
V
OUT
V
CESAT
D
MAX
I
cl
I
LKG
I
SHD
f
DIM
V
IL
V
IH
Conditions
Min
2.7
Typ
Max
10
Units
V
mA
mV
nA
MHz
V
No switching
182
2.6
199
35
3.3
216
100
1.4
T
A
=25 °C
1.0
20
1.2
I
SW
= 85mA; T
A
=25 °C
V
FB
= GND
I
LOAD
= 0; T
A
=25 °C
V
SW
= 5V; V
OUT
= Open
V
EN/SS
= GND; V
IN
= 3V; V
OUT
= Open
90
300
160
300
mV
%
500
0.01
3
1
700
5.0
5
10
50
mA
μA
μA
kHz
mV
V
1.8
©
2007 Semtech Corp.
2
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
