S-8353A20MC-IQFT2X Datasheet, PDF (29/49 Pages) Seiko Instruments Inc – BUILT-IN TRANSISTOR SWITCHING REGULATOR

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_01
S-8353/8354 Series
(12) Soft Start Time (tSS) vs. Temperature (Ta)
fOSC = 50 kHz
8
fOSC = 250 kHz
8
6
6
4
4
2
2
0
−40 −20 0
20 40 60 80 100
Ta [°C]
0
−40 −20 0
20 40 60 80 100
Ta [°C]
(13) Operation Start Voltage (VST1) vs. Temperature (Ta) (14) Oscillation Start Voltage (VST2) vs. Temperature (Ta)
fOSC = 250 kHz
1.2
1.0
0.8
0.6
0.4
0.2
0
−40 −20 0 20 40 60 80 100
Ta [°C]
fOSC = 250 kHz
1.2
1.0
0.8
0.6
0.4
0.2
0
−40 −20 0 20 40 60 80 100
Ta [°C]
(15) Output Voltage (VOUT) vs. Temperature (Ta)
3.40
fOSC = 50 kHz
3.40
fOSC = 250 kHz
3.35
3.35
3.30
3.30
3.25
3.20
−40 −20 0 20 40 60 80 100
Ta [°C]
3.25
3.20
−40 −20 0 20 40 60 80 100
Ta [°C]
29