ST1208
!
Absolute Maximum Ratings
IN, OUT, EN1, EN2 to GND ........……..…....... -0.3V to + 6.0V
SET, LED1, LED2, LED3 to GND ….… -0.3V to ( VIN + 0.3V )
C1N, C2N to GND .........................…..... -0.3V to ( VIN + 1V )
C1P, C2P to GND ...........................……... -0.3V to greater of
.................................................. ....(VOUT
+ 1V) or (VIN + 1V)
Continuous Power Dissipation (TA = +70°C)
16-Pin QFN ( de-rate 17 mW/°C above +70°C )
1350 mW
16-Pin TSSOP ( de-rate 18 mW/°C above +70°C ) 1500 mW
Operating Temperature Range ...….................-40°C to +85°C
Storage Temperature Range .…....................-40°C to +125°C
!
Electrical Characteristics
Condition: VIN = VEN1 = VEN2 = 3.6 V, CIN = C1 = C2 = COUT = 1 uf, dropout current is 60 mA. ( 20 mA / LED X 3 ), LED Vf
= 3.3 V, ISET = 125 uA, Charge pump switching
( TA = +25℃)
Symbol
V
IN
I
IN
I
OUT
I
LED
I
INS
I
LSS
I
LLS
I
SET
V
IH
V
IL
I
EN
V
LED
V
DP
Parameter
IN Operating Voltage
Power Supply Current
Maximum OUT Current
Maximum LEDx Sink Current
Shutdown Supply Current
SET Leakage in Shutdown
LED Leakage in Shutdown
SET Current Range
EN1, EN2 Logic High Voltage
EN1, EN2 Logic Low Voltage
EN1, EN2 Input Current
LEDx Minimum Regulation
Voltage (1.5x Mode)
LEDx Dropout Voltage
Test Condition
-
Switching, no load
VIN >=3.6 V, EN1 = EN2 = IN
VIN >=3.3 V, I
SET
= 190 uA, EN1 =
EN2 = IN
EN1 = EN2 = GND
EN1 = EN2 = GND, TA = 25
℃
EN1 = EN2 = GND, TA = 25
℃
VIN=2.7 V to 5.0 V
VIN=2.7 V to 5.0 V
VENx = GND or 5.0 V, TA = 25
℃
EN1 = EN2 = IN, I
SET
= 125 uA
Min. Typ. Max.
2.7
-
100
28
-
-
-
30
0.7 V
IN
0
-
200
-
-
-
0.8
130
2.2
145
43
14
-
-
80
-
2.0
30
1
0.01
0.01
-
-
-
0.5
300
20
7
11
1.0
160
2.3
160
48
16
±3
±3
88
5.0
4.0
-
-
3
0.1
0.1
200
V
IN
0.2 V
IN
1.0
400
30
10
Unit
V
mA
mA
mA
uA
uA
uA
uA
V
V
uA
mV
mV
Ohm
I
SET
= 125 uA
1x mode ( 1 X V
IN
- V
OUT
) / I
OUT
@
VIN = 4.2 V, IOUT = 60 mA
R
OUT
Open-Loop OUT Resistance
1.5x mode ( 1.5 X V
IN
- V
OUT
) / I
OUT
@ VIN = 3.6 V, IOUT = 60 mA
±
20%
f
SW
Switching Frequency
20℃ hysteresis
T
TS
Thermal-Shutdown Threshold
V
UV
Undervoltage Lockout Threshold VIN rising or falling, 0.25V hysteresis
EN1 = EN2 = IN
SET to LEDx Current Ratio
K
I
SET
= 125 uA EN1 = IN, EN2 = GND
( ILED / ISET )
EN1 = GND, EN2 = IN
EN1 = EN2 = IN, R
SET
= 4.8KOhm,
A
LEDx Current Accuracy
TA = 0℃ ~ 85℃
EN1 = EN2 = IN, I
SET
= 125 uA,
M
LEDx Current Matching
TA = 0℃ ~ 85℃ ( Note 1 )
η
Peak efficiency in 1x mode
I
OUT
= 60 mA, P
LEDs
/ P
IN
X 100 %
Note1: LEDx current matching is define as : ( I
LEDX
- I
AVG
) / I
AVG
X 100 %.
15
1.2
190
2.6
175
52
17
-
-
-
MHz
℃
V
A/A
%
%
%
V1.1
8/12
2004/10/27
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
