SC4539 Semtech Corporation, SC4539 Datasheet - Page 4

• Manufacturer Part Number: SC4539
• Description: High Effi ciency Boost Converter
• Manufacturer: Semtech Corporation

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Electrical Characteristics (continued)
Notes:
(1) Guaranteed by design.
Boost Converter Characteristics (continued)
Switch Leakage Current
Switch Saturation Voltage
COMP Sourcing Current
COMP Sinking Current
OUT Over-Voltage Protection
OUT Internal Pull-Down Current
OUT Bias Current
OUT Leakage Current
PWM Dimming Frequency Range
PWM Dimming Duty Cycle Range
BL Current Setting Range
BL Current Setting Accuracy
BL Leakage Current
BL Current Line Regulation
BL Voltage
ISET Bias Voltage
ISET-to-I
Start-Up Time
Parameter
Current Sink Characteristics
BL
Gain
(1)
(1)
Symbol
ΔI
t
I
BL
V
V
A
start-up
I
V
I
COMP
I
I
D
V
L(LX)
f
OUT
I
L(BL)
OVP
/ΔV
OVP
ISET
ISET
SAT
EN
BL
EN
BL
IN
V
During OVP condition
EN
V
V
V
COMP
COMP
Applied to EN pin
= 0V, V
200Hz on EN pin
V
EN
V
EN
Conditions
IN
= V
= 0.9V, T
= 0.9V, T
= 0V, V
V
I
= 3.0 to 5.5V
T
LX
LX
A
IN
= 25°C
OUT
= 0.3A
, V
= 5.5V
OUT
= V
BL
A
A
= 20V
= 2V
= 25ºC
= 25ºC
IN
= 5.5V
Min
100
-3.5
22
0
1
±0.05
Typ
0.01
0.01
0.01
0.35
250
230
0.5
1.3
40
5
6
1
Max
450
100
50k
3.5
0.1
SC4539
25
60
30
1
1
Units
mA/V
A/A
mA
mA
mV
μA
μA
μA
μA
μA
Hz
μs
%
%
V
V
V
4