SC4509 Semtech Corporation, SC4509 Datasheet - Page 2

• Manufacturer Part Number: SC4509
• Description: Highly Integrated Step-Up Converter
• Manufacturer: Semtech Corporation

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Exceeding the specifi cations below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specifi ed in the
Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device reliability.
Unless specifi ed: V
© 2007 Semtech Corp.
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
POWER MANAGEMENT
Absolute Maximum Rating
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
Lead Temperature (Soldering), 10s (SOT23-6 package only)
Peak IR Flow Temperature, (10-40sec)
ESD Rating (Human Body Model)
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
EN/SS Threshold Low
EN/SS Threshold High
IN
= V
EN/SS
(1)
= 3.6V; C
(1)
IN
= 1μF; C
(2)
Symbol
OUT
V
D
V
= 0.22μF; L = 22μH; unless otherwise noted, T
f
V
I
I
I
V
f
V
CESAT
V
OSC
SHD
QFB
LKG
I
I
DIM
OUT
MAX
Q
cl
FB
IN
IH
IL
MLPD-W8
V
SOT23-6
EN/SS
= GND; V
V
I
SW
SW
I
LOAD
= 85mA; T
= 5V; V
Conditions
No switching
2
V
T
= 0; T
FB
A
=25 °C
IN
= GND
= 3V; V
OUT
A
=25 °C
A
=25 °C
= Open
Symbol
V
T
OUT
V
T
T
V
V
V
V
θ
EN/SS
T
LEAD
OUT
STG
PKG
ESD
SW
JA
FB
IN
J
A
= Open
= +25°C for Typ, -40ºC to 85°C for Min and Max.
Min
182
300
2.7
1.0
1.8
20
90
-0.3 to V
Maximum
-65 to +150
-0.3 to 20
-0.3 to 30
-0.3 to 20
125
165
300
260
30
78
2
Typ
0.01
199
500
2.6
1.2
160
IN
35
3
1
+ 0.3
PRELIMINARY
Max
216
100
300
700
3.3
1.4
5.0
10
10
50
5
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SC4509
Units
C/W
kV
°C
°C
°C
°C
Units
V
V
V
V
V
MHz
kHz
mA
mV
mV
mA
mV
nA
μA
μA
%
V
V
V