Electrical characteristics
STCF03
11/35
6 Electrical
characteristics
Table 6. Electrical characteristics
(T
J
= 25°C, V
I
= 3.6 V, 2xC
I
= 10 µF, C
O
= 1 µF, L = 4.7 µH, R
FL
= 0.27
Ω
R
TR
= 1.8
Ω
, R
X
= 15 K
Ω
,
Typ. values @25°C, unless otherwise specified).
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
V
I
Input operation supply voltage
2.7
5.5
V
V
PW_ON
RESET
Power ON reset threshold
V
I
rising
2.3
V
I
O
Output current adjustment
range I
FLASH
FLASH MODE for V
I
= 2.7 V to 5.5 V
(STCF03PNR)
60
800
mA
FLASH MODE for V
I
= 2.7 V to 3.3 V
(STCF03TBR)
60
600
FLASH MODE for V
I
=3.3 V to 5.5 V
(STCF03TBR)
60
800
Output current adjustment
range I
TORCH
Torch mode V
I
= 2.7 V to 5.5 V
15
200
Auxiliary LED output current
adjustment range I
AUXLED
Ready mode, V
I
= 3.3 V to 5.5 V
0
20
V
O
Regulated voltage range
2.5
5.3
V
FB1
Feedback voltage
Torch mode
30
250
mV
FB2
Feedback voltage
Flash mode
30
250
mV
Δ
I
O
Output current tolerance
Flash mode, I
O
= 160 mV/R
FL
-10
10
%
R
ON_
FB1-FB2 ON resistance
Torch mode, I
O
= 200 mA
90
m
Ω
I
Q
Quiescent current in
SHUTDOWN mode
NTC_ON=0
1
µA
NTC_ON=1
1
Quiescent current in ready -
mode
1.8
mA
f
s
Frequency
V
I
= 2.7 V
1.8
MHz
ν
Efficiency of the chip itself
V
I
= 3.2 to 4.2 V, Flash Mode,
I
O
= 800 mA
87
%
Efficiency of the whole
application
V
I
= 3.2 to 4.2 V, Flash Mode,
I
O
= 800 mA, V
O
=V
fLED_max
+ V
FB2
=
5.02 V
See the typical application schematic
It is included losses of inductor and
sensing resistor
76
OVP
Output over voltage protection V
I
= 5.5 V, No Load
5.3
V
OV
HYST
Over voltage hysteresis
V
I
= 5.5 V, No Load
0.3
V
OTP
Over temperature protection
V
I
= 5.5 V
140
°C
OT
HYST
Over temperature hysteresis
V
I
= 5.5 V
20
°C
