S-8337AAAA-P8T1G Datasheet, PDF (27/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8337/8338 Series
2. Example of Major Power Supply Dependence Characteristics (Ta = 25°C)
1200
1000
800
ISS1
[μA]
600
400
f_OSC = 1133 kHz
(R_OSC = 120 kΩ)
f_OSC = 700 kHz
(R_OSC = 200 kΩ)
ISS1 vs. VIN
200 _{fOSC = 286 kHz}
0 ^{(ROSC = 510 kΩ)}
01234 567
VIN [V]
–200
–180
–160
–140
IEXTH
[mA]
–120
–100
–80
–60
–40
–20
0
0
IEXTH vs. VIN
f_OSC = 700 kHz, MaxDuty = 77% (R_OSC = 200 kΩ, R_Duty = 300 kΩ)
1234 567
VIN [V]
0.10
0.08
0.06
0.04
IFB
[μA]
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
IFB vs. VIN
0 1234 567
VIN [V]
100
90
80
70
MaxDuty ⁶⁰
[%]
50
40
30
20
10
0
MaxDuty vs. VIN
MaxDuty = 88.5%
MaxDuty = 77%
(R_OSC = 200 kΩ, R_Duty = 100 kΩ) (ROSC = 200 kΩ, RDuty = 300 kΩ)
MaxDuty = 47%
(R_OSC = 200 kΩ, R_Duty = 820 kΩ)
0 1234 567
VIN [V]
1.0
0.9
0.8
0.7
ISSS
[μA]
0.6
0.5
0.4
0.3
0.2
0.1
0
ISSS vs. VIN
fOSC = 700 kHz (ROSC = 200 kΩ)
01234 567
VIN [V]
200
180
160
140
IEXTL
[mA]
120
100
80
60
40
20
0
0
IEXTL vs. VIN
f_OSC = 700 kHz, MaxDuty = 77% (R_OSC = 200 kΩ, R_Duty = 300 kΩ)
1 234 567
VIN [V]
1400
1200
fOSC vs. VIN
fOSC = 1133 kHz (ROSC = 120 kΩ)
1000
fOSC 800
[kHz] ₆₀₀
400
fOSC = 700 kHz (ROSC = 200 kΩ)
fOSC = 286 kHz (ROSC = 510 kΩ)
200
0
0 1234 567
VIN [V]
25.0
20.0
tSS vs. VIN
tSS = 20 ms
tSS ^15.0
[ms] _10.0
tSS = 10 ms
5.0
0
0 1234 567
VIN [V]
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