S-8355 Seiko Instruments, S-8355 Datasheet - Page 43

• Manufacturer Part Number: S-8355
• Description: (S-8355 - S-8358) PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko Instruments

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Rev.6.6
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
(7) Maximum Duty Ratio (MaxDuty) vs. Temperature (Ta) (V
(8) PWM / PFM Switching Duty Ratio (PFMDuty) vs.
(10)
Temperature (Ta) (S-8356/58 Series)
_00
ON
25
20
15
10
90
85
80
75
70
1.0
0.8
0.6
0.4
0.2
90
85
80
75
70
5
−40 −20 0
−40 −20
−40 −20 0
0
−40 −20
Temperature (Ta)
/
OFF
Pin Input Voltage “L” 1 (V
V
V
OUT
OUT
0
0
= 3.3 V, f
= 3.3 V, f
20
20 40
Ta [°C]
20 40
20 40 60 80 100
Ta [°C]
Ta [°C]
Ta [°C]
40
f
f
OSC
OSC
OSC
OSC
60 80 100
60
60 80 100
= 100 kHz
= 300 kHz
= 600 kHz
= 100 kHz
80 100
SL1
) vs.
Seiko Instruments Inc.
OUT
(9)
(11)
= 3.3 V)
ON
ON
/
OFF
/
OFF
90
85
80
75
70
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
Pin Input Voltage “H” (V
−40 −20 0
Pin Input Voltage “L” 2 (V
0
−40 −20 0
0
−40 −20 0
V
V
OUT
OUT
= 3.3 V, f
= 1.4 V, f
S-8355/56/57/58 Series
20
Ta [°C]
Ta [°C]
Ta [°C]
20 40 60
20 40 60 80 100
40
SH
f
OSC
OSC
) vs. Temperature (Ta)
OSC
SL2
) vs. Temperatuer (Ta)
60 80 100
= 300 kHz
= 300 kHz
= 300 kHz
80 100
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