T6309B Taiwan Memory Technology, T6309B Datasheet - Page 4

• Manufacturer Part Number: T6309B
• Description: Micropower Step-up DC/DC Converter
• Manufacturer: Taiwan Memory Technology

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Typical Operating Characteristics
(VIN=+3.3V,Load=3 LEDs, L=10uH, C
note: Efficiency=(Vout٠Iout) / (Vin٠Iin)
TM Technology Inc. reserves the right
to change products or specifications without notice.
(200mV/Div)
Vin=3.6V
(2.0V/Div)
(5.0V/Div)
Vout
2.8
2.6
2.4
2.2
1.8
V
3
2
Vin
SW
90
85
80
75
70
65
60
Stability for driving 3 LEDs
2.0
20
2.5
CH
TE
Efficiency (2WLED)
30
3.0
Vin vs. temperature
3.5
40
Vin(V)
Temperature
4.0
50
4.5
60
5.0
(Time=2.0us/Div)
Io=20mA
IN
5.5
=4.7uF, C
70
6.0
OUT
P. 4
=4.7uF, T A=+25 ºC, unless otherwise noted.)
(200mV/Div)
Vin=5.2V
(2.0V/Div)
(5.0V/Div)
Vout
V
90
85
80
75
70
65
60
SW
Stability for driving 3 LEDs
0. 43
0. 42
0. 41
0. 39
0. 38
2.0
0. 4
-30 -20 -10
2.5
Efficiency (3WLED)
VFB Temperature curve
3.0
3.5
0
Temperature (ºC)
Publication Date: SEP. 2005
Vin(V)
4.0
10
20
4.5
30
5.0
Vi n=3. 0V
Load 3LED
Io=20mA
(Time=2.0us/Div)
T6309B
40 50
5.5
Revision: A
6.0
60
70