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SC4509 Datasheet(PDF) 2 Page - Semtech Corporation

Part # SC4509
Description  Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4509 Datasheet(HTML) 2 Page - Semtech Corporation

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© 2007 Semtech Corp.
SC4509
www.semtech.com
PRELIMINARY
POWER MANAGEMENT
2
Absolute Maximum Rating
Electrical Characteristics
Parameter
Symbol
Maximum
Units
Input Supply Voltage
V
IN
-0.3 to 20
V
SW Voltage
V
SW
-0.3 to 30
V
Maximum Output Voltage
V
OUT
30
V
Feedback Voltage
V
FB
-0.3 to 20
V
EN/SS Voltage
V
EN/SS
-0.3 to V
IN + 0.3
V
Maximum Junction Temperature
T
J
125
°C
Storage Temperature Range
T
STG
-65 to +150
°C
Thermal Impedance
Junction to Ambient(1)
MLPD-W8
θ
JA
78
C/W
SOT23-6
165
Lead Temperature (Soldering), 10s (SOT23-6 package only)
T
LEAD
300
°C
Peak IR Flow Temperature, (10-40sec)
T
PKG
260
°C
ESD Rating (Human Body Model)(2)
V
ESD
2kV
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.
Unless specified: V
IN = VEN/SS = 3.6V; CIN = 1μF; COUT = 0.22μF; L = 22μH; unless otherwise noted, TA = +25°C for Typ, -40ºC to 85°C for Min and Max.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Input Voltage
V
IN
2.7
10
V
Quiescent Current
I
Q
No switching
2.6
3.3
mA
Feedback Voltage
V
FB
182
199
216
mV
Feedback Pin Bias Current
I
QFB
35
100
nA
Switching Frequency
f
OSC
T
A=25 °C
1.0
1.2
1.4
MHz
Maximum Output Voltage
V
OUT
20
V
Switch Saturation Voltage
V
CESAT
I
SW = 85mA; TA=25 °C
160
300
mV
Maximum Duty Cycle
D
MAX
V
FB = GND
90
%
Switch Current Limit
I
cl
I
LOAD = 0; TA=25 °C
300
500
700
mA
Switch Leakage Current
I
LKG
V
SW = 5V; VOUT = Open
0.01
5.0
μA
Shutdown Current
I
SHD
V
EN/SS = GND; VIN = 3V; VOUT = Open
3
5
μA
PWM Dimming Frequency(1)
f
DIM
1
10
kHz
EN/SS Threshold Low
V
IL
50
mV
EN/SS Threshold High
V
IH
1.8
V
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.


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